Abstract: An alarm system comprises a pair of interlocking components, which when separated causes an electrical switch operable in response there to change states and activate the alarm. The switch may be either a mechanical type device or a magnetic proximity type device. A cable may be attached to one or both components.

Abstract: A garage door position indicating system includes a tilt switch attached to a garage door, an RF transmitter coupled to the tilt switch, an RF receiver, and an indicator controlled by the RF receiver. The tilt switch supplies an enable signal to the RF transmitter at selected first tilt positions and blocks the enable signal at selected second tilt positions. The RF transmitter generates an RF signal in response to the enable signal. The RF receiver is responsive to the RF signal and controls an indicator to indicate the position of the garage door.

Abstract: A door locking device has a shaft portion, a non-skid end portion adjustably connected to a lower end of the shaft portion, a door handle engaging bracket affixed to an end of the shaft portion opposite the end portion, and an alarm device mounted to the shaft portion so as to be responsive to shocks affecting the door handle. The alarm device has an audio output. The shaft portion includes an arcuate shape extending outwardly from the bracket, a straight section extending from the arcuate shape, and an angled section extending vertically downwardly from the straight section. The end portion is threadedly received by the angled section. The bracket has a generally U-shaped configuration with a prong formed interior of the U-shaped configuration.

Abstract: A portable door alarm having an alarm pushbutton switch extending from the back of the housing of the alarm has a first L-shaped member hingeably attached to a bottom portion of the housing. At the top of the first L-shaped member is a bracket hanger which fits over the top of a door. The first L-shaped member is biased to close the hinge, thereby placing the first L-shaped member in close proximity to the housing. A leg portion of a second L-shaped member, having a longitudinal portion attached to the back of the housing, is located above the hanger and pushes against a wall portion above the door once the device is placed on the door and the door is closed. If the door is reopened, with the alarm set, an engaging portion of the first L-shaped member presses the alarm pushbutton switch as the L-shaped member returns to its close proximity to the back of the housing due to the biasing thereof. An alarm sounds once the engaging portion depresses the alarm pushbutton switch with the alarm set.

Abstract: This is a ring fitted with a device that sounds an alarm during times of emergencies. The special features of the ring are a transmission circuit and alarm device that emits a sound enclosed in the setting of the ring. The switches are at the top of the setting forming a connection between the transmission circuit and the battery when pressed.

Abstract: A device for determining whether a darkened enclosure has been opened by an unauthorized user. Though it responds to the presence of light, the device may be actuated either in light or in darkness without compromising its performance. When placed into a darkened enclosure, the device has the capacity of informing the authorized user of a possible unauthorized opening. After an unauthorized opening, an audible alarm would be triggered for a predetermined period of time. Subsequent to the cessation of this audible alarm, the authorized user by viewing the status of a light emitting diode after depressing an on/off switch, can determine whether an unauthorized user has gained access to the enclosure.

Abstract: A portable bar is provided which attaches and locks to a vehicle steering wheel, preferably attaching to and extending tangentially from the top of the rim, and extends to where it is fully visible from outside of the vehicle. In the preferred embodiment, the bar is a hollow tube in which a pair of clamping members, one being a fixed section of the tube and the other part hinged thereto, surrounds and is locked about the steering wheel rim. A cavity in the tube protectively encloses, along with anti-saw-through bars and/or mace, alarm circuitry and the batteries therefor. Light and sound annunciators on the bar and a LED armed-condition indicator, which preferably flashes only when dark, are provided. A panic button on the outside of the tube manually triggers the alarm. Push button selectors enclosed in the tube are accessible only when the device is unlocked to arm and disarm the alarm or function automatically by contact with the rim upon locking and unlocking thereto.

Abstract: A security circuit includes a power supply and one or more modular switch units and a modular alarm unit. Each modular unit includes two standard multiple-conductor telephone jack sockets, with at least one conductor of each socket connected to the circuitry of the unit, with all of the other conductors of one socket being respectively directly connected in-line to the corresponding conductors of the other socket. The modular units are interconnectable with standard telephone connector cables having modular telephone jack plugs mateable with the sockets. The power supply may be a battery which may also be provided with modular telephone jack sockets. Alternatively, the circuit may be powered from the RS-232 serial port of a personal computer, the telephone connector cable being coupled thereto through a standard adapter. Different versions of switch units and alarm units are disclosed. Series circuits are terminated with a spiral terminator plug.

Abstract: A door looking device has an adjustable length shaft portion of an arcuate shape, a non-skid end portion mounted on a lower end of the shaft portion, and a door handle engaging bracket affixed to an end of the shaft portion opposite the end portion. The bracket has a generally U-shaped configuration. The shaft has an adjustable slide member formed therein. The slide member is affixed to the end portion and is movable so as to move the end portion relative to the shaft portion. The non-skid shaft portion is a pivot pad rotatably connected to the shaft portion. The pivot pad is of generally trapezoidal cross-section. The bracket has a prong formed interior of the configuration and extending upwardly from the shaft portion. An alarm device is mounted on the shaft portion and is responsive to shocks affecting the door handle above a threshold value.

Abstract: A marker is provided for use by emergency service personnel entering a room of a building, to keep the door from latching closed while he/she searches the room, and later help him find the door to exit the room, and to indicate to other rescuers that a search is in progress or has been completed. The marker includes a housing (12, FIG. 1) and a door clamp (14) mounted on the housing and constructed to fit on a door to prevent complete closing of the door. The housing holds an audible alarm generator (20) which generates sound beeps to help a searcher find the door in an environment of thick smoke. With the door clamp holding the door ajar, the sound beeps can be heard from outside the room, so another searcher can determine that a search is in progress. The alarm is settable to generate a different pattern of sound beeps, to indicate that a search is in progress, or has been completed. It also generates light flashes. The door clamp can include a length of wire that extends around the outer edge of a door.

Abstract: A self-contained audible alarm assembly settable for actuation when subjected to an axial compressive force. The alarm assembly comprises a cylindrical body and a pair of end caps each comprising a circular base and an annular skirt. A first end cap is mounted on a first end of the body. A sound producing horn is captively mounted within the body adjacent the first end cap, the base of which is perforated to emit sound from the horn. A battery is located within the body. A pair of contacts is mounted within the body adjacent the second end thereof. Each contact has a portion extending slightly beyond the body second end. The battery and the horn are connected in series between these contacts. An electrically conductive disc is affixed to the inside surface of the base of the second one of the end caps. The disc touches the contacts completing the circuit and energizing the horn when the second end cap is fully seated on the second body end.

Abstract: An alarm buzzer produce an alarm sound from a sound-producing device installed in a hollow container in which an opening through which the sound is sent out is arranged not in the face opposite the sound-producing face of the device but in one or both of the back and side faces other than said face opposite said sound-producing face so that sound amplification is achieved through Helmholtz resonance.

Abstract: A "U" shaped door lock is arranged to receive adjacent handles of a refrigerator door therebetween formed of typically "L" shaped configurations and adjacency relative to one another. The door lock apparatus includes spaced parallel legs of deflectable memory retentent material to effect spring back of the legs when directed together, with a modification of the invention to include a latch member mounted at a lower end of the legs requiring deflection of the legs permitting engagement of the latch relative to both legs to receive adjacent door handles of closed "C" shaped configurations. A further modification of the invention includes an audible alarm member mounted to one of the legs actuated upon attempted removal of the lock member relative to the refrigerator handles.

Abstract: An alarm system includes an electronic central controller or control unit with an internal intrusion sensor. The controller is powered by a single nine volt battery. The system can be expanded by adding auxiliary sensors such as sound discriminators, glass breakage sensors and other low power battery operated sensors. The controller can perform all of the functions normally associated with large A.C. powered systems such as factory adjustable entry/exit and reset delays, entrance monitoring, and controlling of lights and message dialers. The system can be adapted for use in mobile environments.

Abstract: A portable alarm device for monitoring areas against burglary includes an alarm and a power supply connected to the alarm by an alarm circuit. A reception sensor is connected to a variable preamplifier for varying volumes of the alarm signal in accordance with the size of the area being monitored. The preamplifier is connected to at least one rejector circuit frequency filter for controlling the susceptible frequency range of the alarm trigger signals with a microprocessor connected to the rejector frequency filter to receive and transmit the signal. A signal converter is used to activate the power supply. A push button time switch is connected to the signal converter in order to delay time or readiness of the alarm for operation and the power supply is connected to the alarm through the signal converter by a closed circuit for delivering a constant low-intensity current with intermittent interruption by the signal converter.

Abstract: The apparatus described herein is a chain with a warning sign attached to it, that incorporates an audible alarm signal which is activated when a person moves the chain away from an egress that it is blocking, such as a supermarket check-out lane. The apparatus solves the problem of how to block a check-out lane so as to draw attention to any patron who is exiting the store by way of an unattended check-out lane, yet is a device that can be easily discarded from the egress, in the event of an emergency. The unique sign incorporates circuitry within. In the preferred embodiment, the sign is a sandwich with outer layers that have something appropriate printed on them, such as "ALARMED EXIT--For Emergency Use Only", and the inner, hidden portion contains an audible alarm, a battery, an arming switch and position sensitive contacts for detecting when an unauthorized person tampers with the barrier.

Abstract: A self contained alarm is arranged to be attached to a door or near a building opening. One version uses a spring loaded switch held open by a door frame, which closes and sounds an audible alarm when the door is opened. A relay with normally open contacts is energized with the alarm to maintain the alarm until a reset switch is opened by a card or key inserted into a mating slot. Another version uses a rotary trip switch which is operated by a line. The line is placed across a building opening to be guarded and closes the rotary switch if the line is disturbed. A second embodiment uses an arm-disarm switch also operated by a card or key inserted into a mating slot to control a second relay. This arm-disarm switch is placed in a second box on the outside of a door to be guarded to permit arming the alarm after the door is closed. Here contacts of the second relay keep the alarm circuit open until the card or key is withdrawn to provide an arm-disarm function.

Abstract: A portable bar attaches tangentially and locks to a vehicle steering wheel, preferably at the uppermost section of the rim, and extends to where it is fully visible from outside of the vehicle. The bar is a holllow tube in which a pair of clamping members, one being a fixed section of the tube and the other part hinged thereto, surrounds and is locked about the steering wheel rim. A cavity in the tube protectively encloses, along with anti-saw-through bars, alarm circuitry and the batteries therefor. Light and sound annunciators on the bar and a flashing LED armed-condition indicator are provided. A panic button on the outside of the tube to manually trigger the alarm, and push button selectors enclosed in the tube and accessible only when the device is unlocked to arm and disarm the alarm and to activate the light to serve as a flashlight or emergency flasher.

Abstract: A wedge-shaped device for use as an alarm for detecting the unauthorized opening of a hinged, inwardly-opening door may be easily installed at the base of the door to resist forced opening of the door while simultaneously sounding a highly audible alarm signal indicative of an attempt to break in. The device uses a top chassis mounted on a bottom chassis to initiate the alarm whenever the top chassis is forced downwardly onto the bottom chassis, and the alarm will continue to sound until the device is reset. The device maintains its wedge shape even after the top chassis is forced down onto the bottom chassis, thereby effectively preventing the door from opening inwardly until the device is removed from its position at the base of the door.

Abstract: Generally there is provided a cabinet alarm device having a protruding switch lever arm arranged such that it is held open during closure of a cabinet door, but is allowed to close when the cabinet door is opened. The switch is pivotally mounted and urged toward its closed positionby a spring under tension, such as a rubber strip or O-ring fixed to the switch arm and alarm case. This switch controls power to the electronic circuit which includes two oscillator and two controlling comparators. A first oscillator drives an annunciator at a preset high resonant frequency, while a second oscillator operating at a low frequency pulsates the tone. A first controlling comparator circuit operates to disable the tone circuit after a fixed time delay to allow an audible battery check during that delay but preventing further tone unless the circuit is energized for a longer period.

Abstract: An occupancy simulator for casting shadows on the walls of a room, the simulator having a lamp, a shutter for casting the shadow by passing through the lamp's light beam, a motor for driving the shutter, and a microprocessor for controlling the operation of both shutter and lamp so that the shadow moves first in one direction and then, after a delay, in the reverse direction in its base mode of operation. The microprocessor can be programmed to start and stop the base mode, to modify the base mode and to cycle through the base mode in response to an external signal such as from a home security system. Several occupancy simulators can be electrically tied into a supervising unit of a home security system to cycle one or more occupancy simulators in sequence through the base mode upon receiving a signal that one of the detectors of the home security system has been tripped.

Abstract: A portable alarm system includes a compact portable sealed housing having an electronic alarm control circuit therein. An electrical a.c. cord supplies power to the control circuit and plugs into the housing. A telephone jack connects a telephone circuit to a dialer circuit within the control circuit. A digital key pad is secured to the housing and has a plurality of switches actuable exteriorly of the housing whereby to program the control circuit by a lessor person and for actuating or deactuating the control circuit by a lessee user person. A receiver circuit is also provided in the housing and is connected to the control circuit. One or more wireless infrared detectors are detachably secured to the housing and positioned to detect moving objects within an environment to be protected. The detectors have infrared transmitters, of different frequencies, and transmit alarm signals to the receiver.

Abstract: An elongated housing has first and second ends and an alarm responsive to an electrical signal. A switch is provided for controlling the electrical signal and includes contact elements for activating the alarm in each of two activation modes corresponding to compression and extension of the housing. A mechanism is disposed at the housing first end for adjusting the length of the housing. Finally, a mechanism is disposed proximate the housing second end for enabling movement of the contact elements to initiate the two activation modes from an inactive alarm mode in cooperation with the housing length adjustment mechanism.

Abstract: A wedge-shaped housing mounts a reciprocating elongate switch medially positioned and resiliently biased through an upper face of the wedge. Upon depression of the wedge by a door opening, a circuit is completed to actuate an included alarm. A variety of friction surfaces can be removably secured to an underlying surface of the housing.

Abstract: A device for use as an alarm for detecting the unauthorized opening of a sliding door or window is disclosed which is a wireless electronic alarm device which may be easily installed either horizontally or vertically in the casing of a sliding door or window to resist forced opening of the sliding door or window while simultaneously sounding a highly audible alarm signal indicative of an attempt to break in. The alarm device is of lightweight, portable construction in a tubular design which acts to substantially forestall the opening of the sliding door or window without the application of force sufficient to break the door or window. Once triggered, the alarm will continue until the unobtrusive owner-activated reset switch is activated to disarm the device.

Abstract: A portable door alarm is used in such environments as hotel rooms and the like. The alarm has a housing containing the alarm mechanism with a front face on which the alarm controls are mounted. The housing is suspended from the shank of a door handle by a locking clamp connected to the housing by a hinge. The hinge allows the housing to be pivoted upwardly so that the alarm controls can be manipulated from a standing position. The activation of the alarm is with a two component switch. The components of the switch are mounted on the door frame and the door in adjacent positions. The door mounted switch component is connected to the alarm mechanism in the housing with a relatively long flexible electrical wire. The arrangement is such that when a door is opened, the switch circuit opens and the alarm is activated.

Abstract: A security device for installation adjacent a sliding door or window to detect movement thereof. A pair of telescopically constructed tubes include a plurality of batteries connected together to an audio alarm and visual alarm. A pair of movable contacts are disposed between the source of electrical power and the alarms and are movable together to complete the circuit by a depressible switch activated by the sliding door or window. The switch includes a rigid member slidably mounted to the tube with a threaded member fixed to the rigid member and extending towards the movable contacts. An adjustable nut threaded to the end of the threaded member allows for presetting of the space between the switch and the contacts thereby adjusting the sensitivity of the switch and security device to the movement of the sliding door or window.

Abstract: A portable security device adapted to be removably mounted on the top edge of an inwardly swinging door whereby opening of the door will automatically actuate a battery-operated alarm. The alarm includes an audible buzzer, the battery, a manual set switch, an actuation lever and associated wiring electrically connecting said components. The actuation lever is formed of spring steel and projects outwardly from a housing containing the alarm components and is biased to the alarm ON position. The lever is moved to the alarm OFF position by contact with the door frame when the door is in the closed position. Upon inward movement of the door by an intruder the lever is urged by its bias to the alarm ON position thereby actuating the alarm. A lock-in circuit may be incorporated into the main electrical circuitry of the alarm to prevent deactivation of the alarm even if the actuation lever or the set switch is moved to the alarm OFF position.

Abstract: A monitor utilizes a sensor which transmits a signal when a specific phenomenon has occurred. The time of the phenomenon is recorded in memory for later withdrawal and analysis by the operator. Being small, palm-sized, the monitor can easily be attached to such items as a drawer to monitor when the drawer is opened. Additionally, through the use of two-sided adhesive tape or the like, the security monitor can be easily moved from one location to another.

Abstract: A modular electric door lock for securing a door, includes a tubular housing selectively affixed to the door. A pair of brackets are positioned on either side of the door frame and fixedly attached thereto in alignment with the tubular housing. A pair of oppositely disposed slides are contained within the housing and are adapted for telescopic extension from the housing into the brackets, or for retraction therefrom. An electric motor contained within the housing extends the slide members into telescopic engagement with the brackets or retracts them as desired. The electric motors may be battery operated or operated off of 110 volt household current. A switching mechanism, which includes a timer is used for selectively locking the door. An alarm is provided for preventing auauthorized entry.

Abstract: A portable intrusion detection, monitoring and alarm system is housed in a portable carrying case in the configuration of a briefcase with handle for convenient portability and inconspicuous placement at a desired location near a space to be monitored. Intrusion detectors are removed from the carrying case and placed in the space to be monitored. The intrusion detectors may include infrared motion sensors and radio transmitters for transmitting detection signals to a radio receiver in the carrying case. An electronic controller receives the detection signals from the radio receiver and delivers actuating data signals to a digital communicator and digital dialer with a telephone line output. The digital communicator captures a telephone line with dialing signals and sends further coded signals corresponding to different monitored spaces and intrusion detectors from which detection signals are received.

Abstract: A personal security device having modular components that can be assembled in various configurations and combinations to perform a wide variety of security functions. A battery powered main alarm unit can be carried on the person and includes a pull out pin for activating a flashing light and audible alarm siren in the event of an assault, a slide switch may be activated for a flashlight mode. A chemical spray component attaches to the alarm unit and can be used with it or alone. A mounting unit which can be connected to the alarm unit with or without other components mounts on a door or wall and activates the alarm unit when a break in occurs. Other components include a smoke detector and a motion detector which activate the alarm unit in the event of fire or motion indicative of an intrusion. The modular construction provides the versatility necessary to meet whatever security needs are expected, and it also allows all components to use the battery and the audible and visible alarms in the main alarm unit.

Abstract: An apparatus is described which can be used by an individual for a multiplicity of purposes. The individual carrying the alarm of this invention can use the device to signal for help during a mugging. The device can also be used as a general call for help.In particular, a position sensitive switch allows the device to be used to sound an alarm when an individual wearing the device falls. Additionally, the device can be placed against a door so that it can signal a burglary.

Abstract: The invention is concerned with a personal alarm device which can be used for a variety of alarm purposes. In one application, the device is used to sound an alarm when there is an impending attack. This is accomplished, after cocking of the alarm, by simply releasing a removable member which falls away. In another application of the device, the alarm can be carried in a purse or other receptacle and is effective to sound the alarm if the purse is moved away from the hand of the user. In still another application, the device may be used to detect the opening of a window or the relative movement of two members which are normally in substantial engagement with each other. In still another arrangement, the device is used for detecting the withdrawal of the latch bolt of a door.The device employs an electrically-operated alarm, a battery and two switches, all mounted within a housing.

Abstract: A simplified and efficient sound generating device consisting of a self-contained audible signaling device and a means of affording said device protection against moisture and cold temperatures, comprised of a photoelectric cell, a source of energy, a sound transducer means, and appropriate container that permits the entry of light therein. When positioned in an appropriate darkened enclosure, the device permits an immediate audible signal upon the opening of said enclosure and the introduction of light therein. Said device is particularly suited for use as an aid to behavior modification programs that are associated with the need to eliminate the habitual and compulsive over-consumption of food from the diet.

Abstract: A compact case houses a battery powered smoke detector, and an alarm clock is detachably mounted to the case. A mechanism is provided for releasably securing the case to the upper edge of a door, picture frame, or the like, so that the smoke detector is positioned close to the ceiling of a room where it more effectively detects fire. The detachable clock is removed and placed at a more convenient location apart from the smoke detector, for example, on a table in the room. A three-position switch is provided. In one position, the switch cuts off power to the smoke detector to prevent unwanted alarms. In another position, the switch causes an emergency light to turn on while the smoke detector is simultaneously deenergized. In the third position, the switch couples the light to the smoke detector circuit and engages this latter circuit such that the light automatically turns on when the smoke detector alarm sounds.

Abstract: A combination door lock and alarm consists of an adjustable shaft, two pads which are able to pivot, and an automatic alarm. The pads are provided with non-skid surfaces which ensure the stability of the device. The pivot feature of the pads allows quick set-up of the device without the need of extensive adjustment. A novel alarm actuating means is also disclosed, which consists of a spring clip in contact with a toggle switch. The use of the toggle switch allows for a continuous alarm signal, even after pressure is removed from the device. The alarm actuating means is activated by a spring loaded shaft, which will be pushed into the main shaft of the device as pressure is applied to the door. The spring clip is mounted on the outside of the spring loaded shaft and the movement of this shaft is what forces the clip to trip the toggle switch. The unit is designed to fit conveniently into a suitcase for travel and can be suspended from a door knob when not in use.

Abstract: Alarm system providing a signal by turning on alarms, lights, sirens, automobile horns or wake-up signal based on interruption of a monitor loop. Monitor loop includes a resistor which connects to the inputs of a low-power low-offset voltage dual comparator for providing an ON signal for turning on a buzzer alarm and also for driving a relay through a switching transistor. The relay can include normally closed and normally open contacts for operating an existing closed loop or open loop device or circuits. The alarm system also includes a line-adjust circuit for adjusting the particular resistance and the monitor loop, a latch circuit for latching the buzzer and relay in an ON position based on circuit interruption, and includes internal power source as well as provision for external power.

Abstract: A disturbance alarm comprising a hollow tubular case having upper and lower electrical contact plates fixedly positioned therein. A pendulum assembly includes a lower weight which rests upon the flat upper surface of the lower contact plate, an upper weight and a rigid shaft fixed to the weights and spacing the weights from each other. The upper electrical contact plate encircles the pendulum shaft and is adapted to make electrical contact therewith to close an electrical circuit through an alarm device. A collar is slidable within the case for clamping the lower weight onto the contact plate such that the pendulum is balanced thereon out of electrical contact with the upper contact plate. A magnet encircles the pendulum shaft adjacent to the upper weight for attracting and holding the pendulum in electrical contact with the upper plate when such balance is disturbed and an alarm condition is thereby detected.

Abstract: An electrical system is provided for attachment to basement windows or the like for the purpose of sounding an alarm automatically if the window is opened and the device is moved or tampered with. The system comprises a spring-loaded bar or a tube within a tube which is placed in the window frame without the need for screws, adhesive or other fastening means. When installed and spring-loaded, the assembly holds an electric switch in place against the side wall of the window. If the assembly is jarred or moved the switch is released, the electrical connection is either made or broken and an alarm is sounded.

Abstract: A portable room security alarm features a smoke detector alarm, a motion sensing intrusion alarm, a temperature sensing alarm, and a digital display alarm clock. The security alarm includes a deployable thermally conducting mounting clip for mounting the alarm at the top of a door with the clip extended to pass around the upper edge of the door. A deployable temperature sensor probe may be attached to the clip to give early warning of a fire outside the door. The temperature probe may alternatively be attached to other metallic structures passing through the door frame, e.g. door knobs, hinges, etc. Large ventilating apertures in an extensible telescoping housing allow access of smoke to the smoke sensor, and with the housing closed the sensor is sealed off against long term contamination.

Abstract: A portable, self-contained combination smoke and burglar alarm includes a smoke sensor and a tester switch both capable of energizing of an audible warning device, all contained in a housing adapted for mounting on an interior room surface such as on a wall or ceiling above a door or window. A releasably inserted locking pin retains a spring-biased plunger mounted above a pressure actuable tester switch accessible externally of the housing to maintain the plunger in its cocked condition. A line attached to the releasable locking pin also attaches to an adjacent door or window such that opening of the door or window increases tension on the line which effectively removes the locking pin and releases the plunger to strike the tester button and actuate the alarm.

Abstract: A portable alarm is provided with a smoke detecting mechanism and circuit connected to an audible signal activated on the presence of smoke and all contained in a compact housing. To this conventional combination the invention interposes a connector means in the circuit between the detector and alarm which connector means includes a highly visible elongated external hanging electrical lead that is plugged into an opening in the housing to complete the circuit through the electrical lead thus, at all times, conspicuously indicating the armed/unarmed condition of the alarm.

Abstract: An alarm is operatively associated with a movable frame and a stationary frame of a sliding door assembly. It has a plunger engagable with one frame or the other, which plunger is urged outwardly and activates a signal if the alarm is removed from its position. The alarm includes a case in which a modular component can be inserted with the component including a source of power, contacts, and a signal which can be an audible signal or a sending signal which activates a remote burglar alarm. The case of the alarm has a locking pin which can lock the plunger in place when the alarm is removed by the occupant. The alarm is also designed with a gravity-operated block which prevents the plunger from being pushed back into the case to turn off the alarm unless the alarm is turned upside down.

Abstract: A portable apparatus for use by a traveler whereby the traveler is able to protect himself from unauthorized entry through a preselected door and simultaneously protect himself from a fire occuring in the room where the portable apparatus is located.

Abstract: An alarm for a sliding door or the like is provided. The alarm is operatively associated with a movable frame and a stationary frame of a sliding door assembly. It has a plunger engagable with one frame or the other, which plunger is urged outwardly and activates a signal if the alarm is removed from its position. The alarm includes a case in which a modular component can be inserted with the component including a source of power, contacts, and a signal which can be an audible signal or a sending signal which activates a remote burglar alarm. The case of the alarm has a lock which can lock the plunger in place when the alarm is removed by the occupant. The plunger is also designed to be prevented from being pushed back into the case to turn off the alarm without the use of an elongate element insertable into an access opening in the case.

Abstract: A portable door lock and combined smoke and intrusion alarm has an upper forked end engageable with the door handle, a shaft extending in an adjustable length tube and terminating in a non-skid rubber end adapted to engage the floor or carpet. The upper end of the shaft is further retained in its mounted position by a retaining ring or cord. It has its lower end lying in a plane substantially aligned with the longitudinal axis of the shaft. A dual function alarm device is slidably mounted on the shaft and includes an actuator for it with a switch contact normally abutting or close to abutment with the surface of the door at a point below the door handle. Responsive to inward movement and pressure on the door the alarm will be actuated. At the same time, the locking action of the shaft and the upper forked end will divert the opening inward forces into forces directed against the floor so that the door cannot be opened.

Abstract: A portable security device adapted to be removably mounted on a door frame adjacent the inside of an inwardly swinging door to prevent the opening of the door and actuate an alarm when forcible entry is attempted. A steel rod is embedded within a rigid housing and extends outwardly from an end wall of the housing. The rod is removably inserted into a complementary-shaped hole in the door frame. The housing has an angled wall extending downwardly toward the rod and forms an exterior angle of between 120.degree. and 165.degree. therebetween. The angled wall lies in abutting relationship with the inside surface of the door blocking the opening of the door. A battery-operated alarm is contained within the housing and has a control button that projects outwardly through a hole in the angled wall and engages the door for actuating an alarm switch. The angled wall may be covered with a sheet of resilient material with the switch button extending a short distance beyond the outer surface of the resilient sheet.

Abstract: A multiple function alarm (10) for the security of an individual within a preselected area, the alarm (10) having substantially all its electrical components mounted to a board (12), includes a switch (14) for selecting the function the alarm is to perform; a smoke detector (16) for optically detecting the presence of smoke including a light source (72) for generating light and a light sensor (73) both mounted on the board (12); intrusion detector (15) for detecting an unauthorized intrusion into the selected area, a visual alarm (18) and audio alarm (19) for communicating to the individual the presence of a potential security threat; and a plate assembly (13) for housing switch (14), the intrusion detector (15) and the alarms (18, 19) in operative association with the electrical components mounted to the board (12).

Abstract: A portable alarm includes a battery, a horn connected across the terminals of the battery, a position sensitive switch and a double pole, double throw magnetic latching relay, all mounted within a housing having an unstable base. The first coil, first relay switch and the position sensitive switch are connected in series with one another and in parallel with the battery. The second coil, second relay switch and silencing switch are connected in series with one another and in parallel with the battery. The horn and third relay switch are connected in series with one another and in parallel with the battery. Tipping the housing closes the position sensitive switch which energizes the first coil to open the first relay switch and close the second and third relay switches. Opening the first relay switch immediately de-energizes the first coil. However closing the third relay switch completes the circuit between the battery and the horn to sound the alarm.