Abstract: A handbag, briefcase or luggage alarm of the type which sounds an audible and/or visual alarm when the compartment is opened. The alarm is particularly useful for compartments of the type having a zipper-type opening. The alarm can be disabled by opening the compartment several inches and reaching into the interior thereof and switching off a disarming switch which disables the alarm. The compartment may then be opened the rest of the way. Conversely, when the compartment is closed, the same disabling switch is turned back on when the compartment is almost completely closed. The disarming switch may be replaced by an exterior key pad to program a given number sequence for arming and disarming the device.

Abstract: A motion sensor comprises a beam having a level switch mounted thereon in a horizontal position. When the sensor is moved, the beam tilts causing the level switch to activate an alarm or remote device. Also in response to tilting, a motor is energized to move the beam back to its original horizontal position. In a first embodiment, two level switches control one motor. In a second embodiment, one level switch controls two motors. In other embodiments, pendulum type switches are employed.

Abstract: A float switch and a control apparatus of an internal combustion engine are disclosed. This float switch comprises a float attached to a main body so as to be vertically swung around one end thereof, a magnetic material fixed to the float, and a contact adapted to be closed or opened in response to the approach or removal of the magnetic material. The float switch is provided in the pathway of a coolant passage and a lubricating oil passage of the engine. The control apparatus has a warning apparatus which is operative in response to an absence signal from the float switch which is indicative of the absence of the fluid that is being sensed, and has a rotating speed control apparatus to reduce the engine speed. The absence of the fluid is informed to the operator by the warning and the speed reduction. A warning apparatus for an outboard engine to control the engine speed when an abnormality occurs is also provided.

Abstract: A three color aspect light signalling system that displays one color at a time without producing phantom signals. The apparatus utilizes three sources of collimated white light, a filter and two dichroic mirror/filters are used to produce three colored aspects and two output lenses are used to collimate the colored output signal so that it may be seen at distances greater than one mile.

Abstract: An alarm system for sensing entry through premise doors and windows, including primary and secondary circuits joined by a transformer. The primary circuit has an alarm including a siren and floodlight plus a time delay relay (with automatic reset) for activating the alarm for preset periods. A siren delay tube permits siren on-off operation in preset cycles. The secondary contains a plurality of automatic resetting door and window switches. A solenoid operated trigger switch has switch contacts wired to energize the time delay relay whereby the trigger switch solenoid is wired in the secondary for actuation by any door or window switch. A rocker switch in the primary selectively energizes the floodlight without activating the siren and selectively deactivates primary power to the transformer in coaction with time delay relay when the siren and floodlight are activated thus deactivating secondary power to the doors and windows.

Abstract: An optical fiber transducer system employs a single optical fiber that carries an optical carrier signal to a remote transducer location and also carries a multiplexed multichannel signal, each channel having a characteristic delay and a binary amplitude value, to a receiving unit, where each channel of a set of reference signals having a corresponding characteristic delay interferes with the multiplexed signal to separate a channel signal that is envelope detected.

Abstract: A system for determining characteristics and traits of an animal-type subject, such as cattle or the like, comprising: an apparatus and method for holding or confining the subject; an apparatus and method for reproducing at least one profile image of the subject and locating specific reference points on the profile image of the subject related to the characteristics and traits to be determined; an apparatus and method for linear measurement of predetermined parts or portions of the subject by use of the specific reference points on the profile image of the subject; and an apparatus and method for utilization of the linear measurements to provide correlation between the linear measurements of a particular subject and other subjects of a like kind.

Abstract: A sliding-caliper disc brake assembly includes an H-shaped anti-rattle spring for a brake backing plate that is movable directly by a brake apply piston and an electrical lining wear indicator comprising a mounting portion molded from electrically insulating plastics material with an embedded loop of electrical contact wire fastened on to a central region of the anti-rattle spring. A leg of the mounting portion extends into a recess formed in a layer of friction material carried by the brake backing plate. The mounting block is formed with an internal recess a pair of lateral locating arms and a snap-over detent tongue for co-operation with the anti-rattle spring to ensure secure retention of the mounting portion in position on the spring.

Abstract: A light signal transmission/reception system which is provided, at the side of a transmitter for converting an electrical signal into a light signal and transmitting the converted light signal, with an inserting unit for inserting reference pulse signals onto the electrical signal; and is provided, at the side of a receiver, with a unit for deriving the amount of change in the reference pulse signals; unit for compensating for the magnitude of a received signal in accordance with the amount of the change; and a unit for removing the reference pulse signals from the compensated and received signal.

Abstract: A reversible device for demultiplexing several light signals in integrated optics is more particularly intended to separate n light signals of different wavelengths forming a light beam and transmitted by a first optical fiber and for respectively reinjecting into n second optical fibers the n light signals. Produced in a light guide, it comprises achromatic input optics for rendering parallel said light beam, n gratings arranged in cascade form and operating under Bragg conditions, each grating serving to diffract that part of the light beam carrying one of the n light signals and transmitting the not yet diffracted part of said light beam in the direction of the following grating, as well as n output optics associated with n gratings, each output optics being used for focussing that part of the light beam diffracted by the associated grating.

Abstract: An optical switching system is disclosed comprising a set of optical hardware operating on control status supplied from electronic or electromechanical devices connected in a communication network to connect subscribing devices in the network for data transfer, wherein both control information for the system and the actual data information to be passed between two connected devices are coded in position coded light spots, and carried to the switching system by optical fibers.

Abstract: An optical multiplexer/demultiplexer is disclosed in which a reflection grating (1) is formed on a hemispherical lens (2).

Abstract: The present invention provides an improved electronic parking system which has the capability of providing a relatively inexpensive personal security system to better protect patrons while in the parking garage. The invention provides increased protection through the use of a portable and convenient transmitter carried by a patron which activates a receiver-relay to summon help and activates horns and sirens to frighten away an attacker. The response of the system is immediate and does not depend on visual or auditory interpretation.

Abstract: A method and apparatus are disclosed for implementing an optical communication network wherein switchable information signals are retained in the optical mode. Sources of optical signals, destinations for optical signals, and intermediate photonic switches are interconnected by optical links, each link comprising two unidirectional transmission optical fibers. An optical bit stream generated at a source of optical signals comprises repetitive time frames. Each time frame includes a frame synchronizing signal and a plurality of signal groups of information bits separated in time by a route switching interval. The optical bit streams entering a photonic switch are frame synchronized. A particular group of information bits retains its position in time within a frame from the source of the optical signal to its destination. The photonic switch is set up during a route switching interval for transmission of a group of information bits from an input to an output of the photonic switch.

Abstract: Bulk optic echelon gratings suitable for use in multi/demultiplexing optical signals carried on sets of optical fibers. The gratings can be either reflective or transmissive and may be either curved with self-focusing properties or planar requiring the use of auxiliary collimating optics. All versions have the property of being simultaneously blazed at at least two different wavelengths whose ratio is in the range between 0.8 and 0.9. This property of the gratings enables their operation over preferred multiple wavelength bands using a limited set of fibers which are fixed in place. Preferred wavelengths at which the gratings are simultaneously blazed include 1.3 and 1.55 micrometers. Devices incorporating the gratings can be used singly or in groups in inverted tree arrangements for tandem or hierarchical multiplexing purposes.

Abstract: A center-to-end type information service system utilizing the public telephone networks that are fundamental communication media of nation-wide scale is disclosed in which desired information is requested from the terminal side to the center by means of a telephone set or simplified keyboard and then delivered to and received by a TV receiver. A part of the center functions is transferred together with the exchange function to a subcenter located near the terminal. Thus, the length of transmission path connecting the center to terminals becomes shorter and the cost of the whole system can be cut down. A simplified character generator is provided in the subcenter, thereby diminishing traffic of the video network.

Abstract: The present remote data monitoring system employs a laser and a modulated retroreflector for the remote data monitoring of hard to access spaces, targets etc., in combination with an arrangement for a simultaneous friend-or-foe identification, and in combination with devices for the protection against detection and against interrogation of a friend by an enemy laser. In this system, a liquid crystal modulator of special construction depending on the purpose and structure of the system, is arranged in front of a retroreflector and modulated by the respective information. The information is interrogated by a spatially distant laser station by directing a laser beam onto the retromodulator, whereby the information is retroreflected and simultaneously modulated.

Abstract: Due to pulse amplitude modulation (PAM) there is an unwanted signal being undesirably strong and a broadening of the frequency band as a result of the pulses. In the case of digital binary-coding of signals with half-waves or periods of an alternating current and the code elements having small and large amplitude values, high frequencies are required. In the present invention, the samples of the pulse amplitude modulation of signals ranging from single polar/binary to continuous are being coded by half-waves or periods of an alternating current, also providing alternating currents of a lower frequency with predetermined mutual phase shifting for the samples. Due to these measures the aforementioned shortcomings are avoided.

Abstract: A high-speed fiber optic star configuration network uses a processor at the network hub to monitor and control network activity. The hub and the individual nodes of the network cooperate to calibrate node transmitter power levels and node receiver sensitivities. A token passing protocol is used to allocate network access. The token passing is monitored at the hub to detect lost tokens or a babbling bus. The hub processor has the capability to initiate tokens or restore lost tokens and to shut off the transmitter of a node which remains connected to the bus for an excessive period of time. In one embodiment, the circuit elements of the hub are duplicated to provide two separate paths through the hub.

Abstract: Line of sight optical communications apparatus comprising a plurality of optical beam reflectors arranged in a protected region for optical communication therebetween, at least one of the reflectors being arranged to reflect a signal received at the reflectors to a base location remote from the protected region. Stabilized reflector apparatus which is insensitive to rotation about axes lying in a given plane and which is particularly useful in the line of sight optical apparatus is also described.