Abstract: An electrical connector and dual purposes test jack used for testing electrical devices includes both a spring clamp member and a "plug in" pin assembly. The pin assembly has, at one end, an electrically conductive wire receiving portion, a setscrew for attaching an electrical wire thereto, an insulator sleeve therearound and, at the opposite end, a cylindrical, radially compressible, bifurcated, conductive pin having an externally threaded inner end portion. The spring clamp member has, at one end, an electrically conductive tubular receptacle internally threaded adjacent the end thereof and, and its other end, a conductive spring clamp. The pin is longitudinally bifurcated at its outer end portion and is dimensioned such that it may be axially inserted past the internal threads of the receptacle and securely held therein place by the radial compression thereof.

Abstract: An integral grip for the handle of a handgun frame is molded from a resilient, flexible, synthetic plastic material. The grip is of generally U-shaped configuration including a curved rear wall and two spaced opposed sidewall portions. The sidewall portions are biased inwardly from the rear wall portion to their outer edges and are also of tapered cross-section diminishing from the rear wall to the outer edges thereof. The material, its distribution and inward bias of the sidewall portions are such that when fitted onto the handle of the handgun frame, the grip will be in tensioned, clamping relation thereon. An undercut rib is disposed on the inner surface of each sidewall portion adjacent the outer edge thereof for interlocking with a recessed edge portion of the handle. Adjacent the lower end of its rear wall portion, the grip includes a boss with a bore therethrough. The handle, itself, includes two laterally-spaced arms which also include bores aligned with the bore of the boss.

Abstract: A retainer for a revolver yoke stud includes a screw portion with spring and pin detent carried thereby in a unitary assembly. The yoke stud includes an angular groove with a chamfered surface adapted to be engaged by the tapered end of the pin. The frame of the revolver is provided with a threaded bore and a hole in its plate aligned with the chamfer of the stud when the yoke is disposed in operative position in the revolver. The screw serves the dual function of a fastener for the side plate and as the base or mounting member for the spring detent assembly. The screw and pin include oppositely opening tubular recesses and the pin is adapted for axial movment with respect to the screw member. The outer ends of the spring are enlarged to be captured and retained in the opposed tubular recessed of the screw and pin, thereby forming a unitary assembly.

Abstract: Capacitor charge ignition system includes a computer chip programmed to control ignition timing of the system. The system has a generator coil and primary and secondary windings of an ignition coil disposed on one leg portion of a ferromagnetic core. The generator coil is wound with respect to ground potential to provide positive pulses, one preceding and one following, in sequence, an intermediate pulse of negative polarity induced in the generator coil in response to rotation of permanent magnet poles past the one core leg. The positive pulses are supplied to a microprocessor which is programmed to determine the elapsed time between the pair of positive pulses and to provide an output signal which is a multiple function of the elapsed time. A capacitor is charged by the intermediate pulse so that its grounded side is changed to a positive polarity voltage which is connected in circuit with the primary winding of the ignition coil and with the anode/cathode path of a silicon controlled rectifier (SCR).

Abstract: A laundry receptacle includes a backboard and a basketball hoop removably secured thereto by a bracket. A laundry bag is affixed at its open end about the periphery of the hoop. The bracket is designed to permit quick attachment and removal of the hoop. The bracket includes a downwardly opening hook portion to engage the upper surface of the hoop and two arms to engage the underside of the hoop. Hooks disposed along the upper edge of the backboard are adapted to fit onto the upper edge of a door for supporting the backboard thereon.

Abstract: A foldable pocket saw has a handle with a mounting head extending from one end thereof. A blade mounting member is rotatably disposed on the mounting head with a saw blade removably attached thereto. A detent mechanism has a spring loaded pawl actuated by a button radially movable into and out of engagement with one of a plurality of circumferentially spaced, radially extending notches provided in the periphery of the rotatable blade mounting member for releasably locking the saw blade in any one of a plurality of positions relative to the handle.

Abstract: Reciprocal furnace for heating metallic parts to a predetermined temperature has a horizontally reciprocal hearth. The hearth includes a multi-layer firebrick base on which is carried a ceramic fixture adapted to receive the metal parts to be heated in the furnace. The ceramic fixture has a plurality of parallel slots which are longitudinally spaced apart in a direction corresponding to the reciprocal movement of the hearth. The hearth is supported at its underside by a reciprocal drive mechanism and is moved incrementally by a drive motor to advance each slot of the fixture in sequence to a predetermined position at which a part is inserted therein by the reciprocal feed mechanism. After all the slots have been sequentially loaded, the hearth is retracted by the reciprocal drive mechanism to its initial position at which the part, first inserted, is removed and another part is inserted in the same slot. The loading and unloading cycle is repeated continuously.

Abstract: A teaching aid includes a plurality of lenses arranged in an array and mounted within a frame member. A slide channel is disposed along the edges of the frame and is imprinted along one edge with numbers from one to ten. A panel having an index mark is slidably disposed in the slide channels and is movable with respect to the lenses to uncover a specified number of lenses equal to the number disposed in alignment with the indicator mark. Each of the lenses has a cross-section providing a wide field of vision.

Abstract: Electronic control system for a gas-fired/hot air furnace includes a primary control unit which controls the flow of fuel to the furnace. The furnace has heating and cooling space thermostats and a comfort fan to supply heated or cooled air to the space being monitored by the thermostats and an induced draft blower which supplies combustion air into the furnace for heating. A first switch and associated relay drive selectively energizes the comfort fan for low speed heating operation and a second relay switch and associated relay drive selectively energizes the comfort fan for high speed cooling operation. Actuation of the heating thermostat energizes a third switch and associated relay drive which energizes the induced draft blower. A high temperature thermostat located to sense excessive furnace temperatures is also connected to actuate the third relay to energize the induced draft blower in an excessive temperature condition.

Abstract: Electronic control system for an oil burner has a primary direct current power source controlled by a thermostat and a secondary direct current power source independent of the thermostat. A first relay is in circuit with the oil burner motor to energize the same and a second relay is in series with the first and with an alternating voltage source for energizing the ignitor of the furnace. An electronic circuit controls the first relay switch and includes a pair of silicon controlled rectifiers (SCR's) connected in series for energizing the first relay. A second electronic circuit includes a pair of interconnected NPN transistors for controlling the operation of the second relay switch. The first NPN transistor is conductive when the second relay switch is energized and the second NPN transistor is connected to the first to turn "OFF" the same in response to flame being sensed in the furnace.

Abstract: A reversible magazine catch mechanism for handguns includes a knurled actuator button removably screw-fitted onto a shaft which is disposed for slidable axial movement in a bore which extends laterally through the frame of the gun. An enlarged head portion is disposed on the end of said shaft opposite the actuator button and an arm extends radially from the head for interlocking engagement with cutouts provided in opposite sides of the magazine. A spring-biased detent engages a recess in the undersurface of the actuator button to prevent unscrewing of the button from the shaft and to bias the latch arm of the laterally movable shaft into engagement with one of the magazine cutouts.

Abstract: A preferred insulative foam insert to be placed in the cores of masonry building blocks. The inserts are rectangularly formed with top and bottom surfaces and front and back faces. Compression slots are formed in the insert and extend upwardly a substantial distance from the bottom surface; they also extend laterally from the front and back faces a depth which is at least equal to half the width of the insert. The compression slots provide an end-to-end compression of the insert for fitting blocks having different core sizes.

Abstract: A trash compactor has a reciprocable platen with a pivotable outer leaf. An electric motor rotates with a telescoping drive-screw mechanism which reciprocably drives the platen in its compaction and retraction strokes. A toggle linkage mechanism automatically pivots the outer leaf to an upwardly inclined orientation from a coplanar relationship with the platen in response to upward and downward reciprocable movement of the platen by the drive-screw.

Abstract: A spiral mascara brush including both soft bristles for applying mascara and stiff bristles for combing applied mascara through a user's eyelashes. The soft and stiff bristles are intermingled throughout the length of the brush in specified proportion so that the entire brush may be used both for applying the mascara and combing the eyelashes.

Abstract: Automatic reset for an unattended gas furnace has an induced draft blower motor energized by an electrical power source and with a first, normally "open", relay switch in circuit to control the operation of the blower motor. A burner control circuit, energized by a transformer coupled portion of the power source, has a room thermostatic switch, a second, normally "open", relay switch in series with the thermostatic switch and an air-flow switch operated by airflow in the furnace to connect the control circuit to the second power source when the blower is "on" and the thermostat is "closed", calling for heat. The second switch is connected to the control electrode of an electronic switching element to energize selectively a relay controller which, when energized, closes both the first and second relay switches to energize the blower motor and burner control circuit.

Abstract: A fault indicator light control circuit for a regulator controlled alternator/battery charging system has a first transistor connected with a light bulb in its conductive path to be turned "ON" when the transistor is conducting. Conduction of the transistor is controlled by a plurality of conductive paths connected to the base of the transistor and each path includes a Zener diode having a breakdown voltage substantially above the rated voltage of the battery. The conductive paths are connected to detect any one of a plurality of circuit operating defects, including a short in the silicon controlled rectifier (SCR) of a solid state regulator, an open SCR and a regulator failure. A capacitor is connected in the circuit to be charged by an alternator voltage having a polarity opposite that which is used to charge the battery. The capacitor voltage is used as a reference to bias the first transistor "OFF" when the system is operating normally.

Abstract: A cutting device for cutting the shield of an armored cable has three mutually hinged members. One member is interposed between the other two and has a channel opening on one side for receiving the shielded cable therein. The second member is pivotable at one end of the first member and has a rotatable, circular cutter. The upper wall of the channel includes an axial slot to provide an access opening for the circular cutter. The upper wall of the channel member is generally in wedge shape construction for engagement with the upper surface of the shielded cable. The third member is pivotable to the one member at the same end as the second member and includes at its outer end a cable holding plate which extends upwardly from the outer end of the third member. A slot disposed in the lower wall portion of the channel member provides access for movement of the cable holding plate therethrough.