Abstract: A primary electrochemical cell having an oxidizable active anode material, a cathode current collector including a catalytic layer for reducing the liquid cathode material, and an electrolytic solution comprising a liquid cathode material and an electrolyte solute dissolved therein. The catalyst layer is a composite material of carbon black particles with platinum particles supported thereon.

Abstract: Sensing apparatus for monitoring the passage of objects, including people, through a doorway. A source of radiant energy is positioned at one side of the doorway and two spaced-apart detectors are positioned at the opposite side to receive beams of radiant energy from the source. A receiver is connected to each detector and produces a signal indicating whether the beam of radiation from the source is impinging on its associated detector or is being blocked by a passing object. Logic circuitry responds to the signals from the receivers and produces a first or second output condition depending upon which beam from the source is the last one to be interrupted by a passing object.

Abstract: An acoustic surface wave device including a three-phase unidirectional transducer. The transducer has three sets of interdigitated electrodes. The first and second sets of electrodes are each connected to bus bars, one on each side of the central axis of the transducer. The electrodes of the third set are connected to two bus bars one on each side of the central axis. The structure of the third set of electrodes and the bus bars connected thereto is symmetrical with respect to the central axis. The balanced structure of the transducer permits simplified impedance-matching and phase-shifting networks for enabling three-phase unidirectional operation of the transducer from a single phase electrical source.

Abstract: Electrical power supply for use with apparatus which transmits a predetermined message. When an input signal is received, a source of electrical energy is connected to a power output terminal by turning a switching transistor on. A latching circuit holds the transistor on after termination of the input signal. Elements of the apparatus which are connected to the power output terminal to obtain operating power transmit the predetermined message when the electrical energy is supplied to the terminal. When the transmission is complete, the apparatus produces a termination signal to the latching circuit causing it to turn the switching transistor off and thus disconnect the source of electrical energy from the power output terminal.

Abstract: Sensing apparatus for monitoring the operation of an electrical appliance. The sensing apparatus is plugged into a standard electrical outlet and the appliance to be monitored is plugged into the sensing apparatus. The appliance current flows through a transformer in the sensing apparatus. Detection circuitry including a comparator produces one signal when current flow through the transformer is negligible (appliance off) and another signal when the current flow through the transformer is significant (appliance on). Transistor circuitry connected to the detection circuitry produces a pulse at one output terminal on a transition from the one signal to the other signal from the detection circuitry (appliance turned on) and produces a pulse at another output terminal on a transition from the other signal to the one signal from the detection circuitry (appliance turned off).

Abstract: Variable phase shift apparatus employing two transistors having their bases connected together and their collectors connected together. The input terminal is coupled to the emitter of the first transistor. A phase control arrangement of a capacitance and a variable resistance in series is connected between the input terminal and ground. The juncture of the capacitance and the variable resistance is connected to the bases of both transistors. A phase control signal is present at this juncture. The collector current in the first transistor is in phase with the difference between the input signal and the phase control signal. The collector current in the second transistor is 180.degree. out of phase with the phase control signal. The two collector currents are combined by flowing through a common load resistance to produce an output signal which is the resultant of the collector currents in the two transistors.

Abstract: Electromagnetically operated contactor or relay employing contact modules which are removably mounted in either of two positions respectively providing normally open and normally closed contact conditions. One set of contact modules is mounted in a main frame and a second set is mounted in an upper frame which overlies the main frame and obscures the first set of contact modules. Transparent viewing members extend through apertures in the upper frame. Each transparent viewing member has a viewing surface exposed externally of the upper frame and an image transmitting surface adjacent to a contact module of the underlying first set. Each contact module has two light reflecting surface areas which are distinguishable from each other, one or the other being adjacent to the image transmitting surface of the associated transparent viewing member depending upon the position of the contact module.

Abstract: An amorphous, resistive thin film is deposited on internal surfaces of portions of a cathode ray tube by the pyrolysis of a liquid mixture of colloidal graphite and a heavy metal resinate to produce a film which is a mixture of graphite and the oxide of the metal. The metal resinate is a combination of tin and antimony resinate. The film is deposited on the tube neck in the region of the G3 and G4 electrodes to impede arcing. The amorphous film is also deposited on the tube funnel in the region extending from the snubber contact locations up to the anode voltage terminal. The pyrolysis of the heavy metal resinate and colloidal graphite results in a film having a resistance ranging from 10.sup.3 to 10.sup.8 ohms point to point. The amorphous film which does not require a binder, has good adhesion and scratch resistance characteristics, thereby reducing conductive particle contamination.

Abstract: Time-correlation apparatus for collecting correlation data when the noise level is low and inhibiting the collection of correlation data when the noise level is high without losing valid correlation data which has already been obtained. An incoming signal is checked for data pulses during each correlation measurement pulse of a synchronizing signal. The correlation measurement pulses are counted by a first counter, and the coincidences of data pulses and correlation measurement pulses are counted by a second counter. A noise monitor samples the incoming signals 100 times during each of a continuous series of noise analysis periods and counts the number of times the signal (assumed to be noise) exceeds a predetermined threshold. A high noise signal is generated if the threshold is exceeded 30 or more times, and a low noise signal if it is exceeded less than 30 times.

Abstract: Disclosed is a primary electrochemical cell having an improved cathode current collector and a method for making the current collector. The cell comprises an oxidizable active anode material; and electrolytic solution comprising a reducible soluble cathode and an electrolyte solute dissolved therein; and a cathode current collector comprising a layer of finely-divided catalyst for reducing the solvent, bonded to an inert, electrically-conductive substrate. Preferably, a bonding layer, comprising a finely-divided polymer and a minor amount of conductive material, bonds the catalyst layer to the substrate. The bonding and catalyst layers preferably can be formed by sequentially applying respective dispersions thereof to the substrate, drying, and heating to bond the materials. Soluble cathode cells employing cathode current collectors of the type described have exceptionally rapid discharge properties.

Abstract: An acoustic surface wave filter device having an input transducer of interleaved overlapping electrode structure. The portions of the inactive electrodes and the active electrodes outside the overlap envelope are combined into continuous uninterrupted metal layers. The elimination of electrode edges in the regions of the metal layers greatly reduces the problem of spurious signals caused by acoustic reflections from the edges.

Abstract: Electromagnetically operated contactor employing contact modules which are converted from normally open to normally closed and from normally closed to normally open operation by inverting the contact module in the contactor. The contact terminals of the contact module are clamped by various arrangements against conductive members of the contactor. Wiring terminals for connecting external wiring to the conductive members are spaced from the arrangement for clamping the contact terminals to the conductive members. Thus, the wiring terminals and the external wiring do not interfere with the module or arrangement for clamping, and the module may be removed, inverted, and replaced without disturbing the external wiring connections.

Abstract: An improved electrical outlet box of the type having a spacer member, providing a back wall and end walls, and two side walls. The box has cooperating members for rotatably wedging one end of each side wall against an end wall to securely fasten it to the spacer member. The box also has an arrangement for camming the end walls together with the side walls to provide a tight box. The box includes bulged side walls for providing additional working space within the box while at the same time improving its mounting. The box also includes a different improved arrangement for use in fastening it to a support.

Abstract: Disclosed is a primary electrochemical cell which employs a lithium metal anode, a lead sulfate cathode, and an electrolyte solution comprising a lithium salt in an organic solvent. The cell has an operating voltage and energy density sufficiently close to conventional 1.5 V cells to permit their direct replacement.

Abstract: An ultra-thin button-type hermetically sealed battery containing two primary electrochemical cells of the lithium-carbon type. The battery includes two similar dish-shaped housing members having outwardly turned rims. The rims of the two housing members are welded to a thin flat collector member of the same diameter as the housing members to form a sealed enclosure of two chambers. Each chamber contains a carbon cathode, a lithium anode, insulating separators, and an appropriate electrolytic solution with the elements suitably arranged and mounted to provide two cells in series. Terminal members pass through the centers of the housing members and are insulated therefrom. One terminal member makes electrical contact to the cathode in one chamber and the other terminal member makes electrical contact to the anode in the other chamber. The battery has a diameter of approximately 25 millimeters and a thickness of about 3 millimeters.

Abstract: A memory system of an array of memory elements arranged in an electrical matrix of rows and columns. Each memory element comprises a bistable circuit of two bipolar transistors. Holding current flows through the on transistor of each memory element of a row from a common current source to a common line. When a memory element is switched so that is transistors reverse operating conditions, the holding current flow through the memory element is diverted during the transition. A clamping arrangement of a transistor and associated resistance is connected between the common current source and the common line of each row. When all of the memory elements of a row are switched at the same time the clamping arrangement provides an alternative controlled current path for the diverted holding currents.

Abstract: A hand tool for quickly, easily, and cleanly removing concentric knockout rings from electrical sheet metal enclosures. The tool is an elongated member fabricated of flat metal stock. Notches in opposite edges at one end of the tool are adapted to engage opposite inner edges of a knockout ring having a central opening. The tool is rocked back and forth pivoting the two halves of the knockout ring about the tabs retaining it in the sheet metal of the enclosure until the tabs fracture completely severing the knockout ring from the enclosure and providing an opening in the enclosure wall for accommodating cable or conduit.

Abstract: An article of manufacture is provided comprising a substantially transparent high density polycrystalline yttria-base body consisting essentially of yttria and from about 0.01 to 5 wt. % alumina.A method for preparing the transparent yttria doped with alumina is also provided comprising admixing alumina or a precursor thereof with yttria or a precursor thereof, drying the admixed powders, calcining the admixed powders and pressing the calcined powders into a desired shape and thereafter sintering the shaped powder for about 1/4 to six hours at a temperature above the eutectic temperature at a sufficiently low oxygen atmosphere to prevent oxidative contaminants.

Abstract: An improved electrical outlet box of the type having a spacer member, providing a back wall and end walls, and two side walls. The box has cooperating members for rotatably wedging one end of each side wall against an end wall to securely fasten it to the spacer member. The box also has an arrangement for camming the end walls together with the side walls to provide a tight box. The box includes bulged side walls for providing additional working space within the box while at the same time improving its mounting. The box also includes a different improved arrangement for use in fastening it to a support.

Abstract: An improved programmable divider employed in a frequency synthesizer which is part of an FM broadcast receiver. The programmable divider has a counter and counter control circuitry for dividing-down the output of a voltage controlled oscillator to the output of a reference frequency source. The counter control circuit causes the counter to count through a first fixed phase after which a second variable count phase takes place. The duration of the second phase is established by an analog input timing circuit and varies with the tuned frequency. After the second phase, the counter counts through a third fixed phase which is a function of the offset or intermediate frequency of the receiver.