Abstract: A pressure gauge includes a housing, a Bourdon tube with a closed end, an adjustment rod mounted rotatably in the housing, a microswitch installed on the adjustment rod, a gear, a sector wheel meshing with the gear, and a crank member interconnecting the sector wheel and the closed end of the Bourdon. Increase of the air pressure inside the Bourdon tube activates a portion of the assembly of the Bourdon tube and the sector wheel to contact the microswitch, so as to stop supply of compressed air from a pressure source to an article which is measured by the gauge. The adjustment rod can be rotated relative to the housing so as to change the distance between the microswitch and the portion of the assembly, thereby adjusting the preset upper limit value of the air pressure inside the Bourdon tube.

Abstract: A lighted switch set gauge includes Hall effect devices using a circuit activating switch attached to a lower extension of indicating and switch set pointers. The switch set pointer is externally adjustable. An overriding slip gear with automatic spring-back is incorporated in the switch set arm prevent damage to the set pointer at the extreme ends of its range of movement. The indicating pointer can be calibrated without removing a hub attached to the shaft of the gauge meter movement.

Abstract: An apparatus for mounting a plate on a plate cylinder includes a plate lockup device, a reference pin, a detecting sensor, and a lamp. The plate lockup device is provided in a gap formed in a circumferential surface of the plate cylinder. The reference pin is supported by a gripper portion of the plate lockup device and engaged with a reference pin hole formed at an insertion end of a plate when the plate is inserted into the gripper portion of the plate lockup device. The detecting sensor is arranged at a position corresponding to at least a bottom portion of the reference pin hole to electrically detect that the bottom portion of the reference pin hole contacts the reference pin. The lamp confirms and indicates insertion of the plate on the basis of an output from the detecting sensor.

Abstract: An elevator hall call button includes a switch (20, 56) as well as displays (21, 54, 55) comprising matrices of light emitting diodes to provide an indication to a passenger of the imminence of arrival of the responding car. The display can be floor position (FIG. 5), flashing at a varying speed (FIG. 6) flashing at a lobby floor whenever a car approaches the lobby (FIG. 7) or in response to a lobby call (FIG. 8), an arbitrary number which reduces in response to the car approaching (FIGS. 9 and 10), or time remaining (FIG. 11).

Abstract: A pressure gauge and indicator switch wherein a Bourdon tube and electrical switch are sealably contained within a liquid-filled compartment, and a liquid pathway is provided between the Bourdon tube and an external fitting. The electrical switch leads are connectable outside the compartment, and the Bourdon tube is mechanically linked to a pressure indicator so as to provide an analog reading of actual pressure within the Bourdon tube, and the Bourdon tube is mechanically linked to the pressure switch so as to provide a switch actuation whenever the pressure within the Bourdon tube reaches a predetermined level.

Abstract: A signalling gauge may utilize a non-captivating, magnetically actuated switch element which is mounted in an influence zone of a path of a magnet carried by an indicating pointer of the gauge. The gauge may operate despite the presence of dust, dirt or other pollutants for an extended period of time without inducing sparks or arcing often associated with electromechanical contacts. Hall effect switch elements such as latches or digital switches may be utilized as a switch element for signalling to drive an audio or visual alarm or a digital signal.

Abstract: An apparatus with an initiator for detecting the rotational position of a shaft (10) comprising a housing (2) containing an electric sensor element (14) and a movable revolving body (22) fastened on the shaft (10). The apparatus achieves a simple and functionally reliable alignment of the revolving body (22) with respect to the sensor element (14) in order to facilitate assembly or adjustment at low cost. The revolving body (22) is rotationally fixed to the shaft (10) by means of a clamping connection and is adjustable in the circumferential and/or axial direction upon contact with a stop body in the housing once the clamping force of the clamping connection has been overcome.

Abstract: A pressure gauge has a turning button, a turning disc and a sliding block disposed thereon that, through a protruding wheel fixed on the needle shaft moves the sliding block to force a contact point of a conducting metal piece to contact with a contact point of the turning disc, can start an alarm in case the needle of the gauge comes to reach the designated pressure.

Abstract: A modular switch device includes a housing enclosing an interconnected control module, a display module and a power module. A sensor module supplying analog data signals from one of a temperature or pressure sensing element connects to the control module through a passage in the housing. A user connects his electrical wires and electrical power to the electrical assembly within the housing through an opening. The user can select between AC and DC switched output modules and the presence or absence of a 4-20 milliampere output module by plugging and unplugging same from wells provided in the housing. The manufacturer and user thus can modify the standard housing, which includes an internal electrical assembly to be a pressure or temperature switch and to provide selected output switch characteristics by applying and removing selected sensor and output modules thereto.

Abstract: An electric position indicating apparatus includes a base structure which accommodates a central reciprocating element is provided with a control mechanism for determining the position of the reciprocating element. Connected to the base structure is a component carrier the walls of which support the control mechanism with its control elements, clamp terminals and circuit boards. The walls of the component carrier are directed toward the corners of the base structure with the control elements supported at one side of the base structure and the clamp terminals at the opposing side thereof.

Abstract: A cam-actuated microswitch unit has cams the positions of which can be varied relative to a drive shaft to vary the switch-actuating point. The unit includes a plurality of microswitches rigidly connected to a support while the cams are frictionally retained in a selected angular orientation on the drive shaft which can be connected to a measuring instrument so that its angular orientation is representative of the magnitude of a physical quantity to which the instrument is sensitive. The cams are connected to index pointers which can be moved over a movable scale fixed for rotation with the drive shaft to determine and to display the switch point settings.

Abstract: Improvements in a manual control device wherein an incremental touch key or a decremental touch key is depressed by hand so as to bring a manipulated value and a set value into agreement. The manual control device comprises a pressure sensor which converts a contact pressure of a hand into a voltage level which is proportional to the pressure, a level encoder which delivers a pulse at any one of a plurality of different frequencies to a counter in correspondence with the output of the pressure sensor, a D/A converter which converts a digital output of the counter into an analog output, and an output driver which controls a base current of a transistor for driving a manipulated-value indicator, by the A.C. output of the D/A converter.

Abstract: An encoding apparatus provides range or other data as determined by the setting of a control or selection knob therefor. The encoding apparatus is intended for use with an instrument providing an output voltage representative of data within a range, and providing output signals indicative of the setting for the range control or selection switch of the instrument. The encoding device is adapted to fit externally of the instrument chassis and is mounted between the range selecting knob and the chassis. The encoding apparatus is non-invasive, requiring no connection to or modification of the internal components of the measuring instrument.

Abstract: A keyboard for inputting plural letters or symbols includes a number of switches, each of which has its associated letter or symbol displayed in a transparent window adjacent thereto. The keyboard is arranged such that a display card located beneath the transparent windows may be replaced so as to easily change the letters or symbols which are visible through the transparent windows.

Abstract: A device is used for indicating a preset torque on a conventional torque wrench. The device has a front part and a back part, which are held together by a U-shaped bracket. The bracket serves to secure the front part and back part of the device on opposite sides of the torque wrench's dial. The device includes a battery which is electrically connected to a copper plate on the back part of the device. This copper plate electrically connects to the pointer of the torque wrench by way of the indicating plate and rod. When the pointer is deflected an amount determined by the positioning of the device on the indicating plate, the pointer will contact and electrically connect to a resilient terminal on the device. This contact will connect the battery to a circuit in the device, causing the device to generate an audible and turn on a light. A test switch is included and used for bypassing the pointer arm in determining that the circuit is still operative.

Abstract: To an odometer which has two parallel shafts, one being fitted with a plurality of distance-indicating wheels, while the other is fitted with a plurality of carry pinions which actuate said distance-indicating wheels, is fitted an alarm device, which comprises a means for triggering, which rotates together with one of said carry pinions, and an alarm switch, which is actuated by said means for triggering when it reaches a certain predetermined position during its movement together with its carrying pinion.

Abstract: An apparatus for providing a service reminder when a vehicle has accumulated a predetermined mileage comprises a potentiometer operated by the highest order number wheel of the vehicle odometer to provide an output voltage which changes incrementally with each indexing motion of that number wheel. An electrical detector responsive to the potentiometer output energizes a signal lamp when the output reaches a voltage in a predetermined range representing a desired service interval. An electrical connector in circuit with the potentiometer can be disconnected to change the potentiometer voltage to a value outside the predetermined range to allow the service reminder circuit to turn off the indicator lamp when the indicated service has been performed. The apparatus is adapted to operate in conjunction with an electronic engine control module which can be programmed to detect the predetermined value of the potentiometer output and to operate a signal lamp.

Abstract: A speed indicating apparatus for an automobile comprising a plurality of indicator lights showing the travelling speed at all times, a half-circular magnet pivoted on a hand shaft of a speedometer in the automobile, a plurality of contact metal plates connected to a lead wire of each said indicator light separately, and a ground connection circular metal plate connected to said hand shaft of said speedometer; said speed indicating apparatus being capable of giving indications of the travelling speed to other drivers at all times and reminding the driver of his speeding so as to minimize the traffic accidents.

Abstract: An industrial type switch having modular parts which may be assembled so the switch may be used in a wide range of installations. The switch includes a differential module which is easily adjustable to operate over a selected range of pressures, a plug-in snap switch module so the switch may be easily wired and serviced, a range module so the response of the switch to pressures within a range may be readily accomplished, and any one of a plurality of different type actuator modules which are mountable on the exterior of the switch so the switch may be used in a large variety of different type installations.

Abstract: An electric switch mounted within an enclosure having a hinged cover is manually operated from outside the enclosure by a handle mechanism secured to the enclosure. The cover is provided with a single aperture near the edge thereof remote from the cover hinges, with this aperture providing clearance for the operating handle and housing of the mechanism when the cover is closed and also providing clearance for a catch which holds the cover closed. A defeatable cover interlock prevents opening of the cover when the switch is closed, and a defeatable switch interlock prevents closing of the switch when the cover is open. The handle mechanism housing is provided with a front recess having a pivoted indicator member therein which is connected by a wire link to the cradle of the trip free contact operating mechanism.

Abstract: The control system is of the type which is manually controlled by a suspended control box. Directional errors arise when the control box is twisted relative to the installation being controlled since the controls on the control box no longer have their original meaning. A direction indicating mechanism is therefore provided which comprises an indicating member mounted within the control box and visible to an operator, which indicating member is held against rotation relative to the installation but is able to rotate relative to the control box itself.

Abstract: A bracket member of square U-shaped configuration having first and second spaced parallel arms and a head joining the arms and extending perpendicularly thereto rests on a wall of a freezer at the opening of the freezer with the first arm abutting the outside surface of the wall, the second arm abutting the inside surface of the wall and the head abutting the edge of the wall. A battery and an alarm are mounted on the first arm of the bracket member. A thermometer device is mounted on the second arm of the bracket member and has a column of mercury for indicating the temperature and a pair of spaced electrical contacts in the path of the column of mercury at an unsafe temperature. Electrical conductors connect the battery, the alarm and the thermometer device in a circuit whereby when the temperature in the freezer becomes unsafe as indicated when the column of mercury reaches the electrical contacts, the circuit is closed and the battery energizes the alarm.

Abstract: A pressure switch incorporates a pressure gauge in which the indicator actuator is operatively connected to an element movable in response to pressure variations in the system being monitored, which element is also part of the switch operating mechanism.

Abstract: A self-cleaning or wiping switch contact for use on machinery monitoring gages embodies a spring contact arm mounted directly on the gage movable pointer for wiping coaction with either high or low adjustable set contacts of the gage.

Abstract: A deviation meter, responding to a deviation signal, is mounted on a turntable which rotates in response to a set point adjustment. Rotation of the turntable maintains the null position of the deviation meter pointer at a scale position corresponding to a set point value, so that a direct readout of the actual measurement value is provided.

Abstract: The circuit control unit of the present invention comprises a piston-type pressure responsive member or gauge wherein one end of the piston extends beyond the gauge body and carries an actuator which is movable with the piston. A circuit control member is mounted for actuation by the actuator for controlling an external electrical circuit in response to changes in fluid pressure as detected by the pressure responsive member. Where desired, an indicator may be mounted in fixed relationship with the pressure responsive member, providing means for visibly indicating the pressure of the fluid and the position of the piston with respect to the pressure responsive member.