Abstract: A small self-contained voltage monitoring device, which can be connected to a power line, has a display driver in circuit with a plurality of lamps to light one lamp at a time, depending on the power line voltage. A first oscillator in circuit with the display driver is actuated to operate a sound generator and alarm if the power line voltage falls outside a preset range. A second oscillator is in circuit with the first oscillator if the power line voltage is interrupted even momentarily, both oscillators are actuated by an auxiliary power source to generate a different sounding alarm. The alarm will continue to sound even if the power line voltage is restored until the auxiliary power source is manually deactivated.

Abstract: An electrical connector assembly has socket and plug connectors. Each connector comprises a block of dielectric plastic in which are tapered cavities containing pyramidal modules which have two sections forming a casing enclosing an electrical contact. The modules of the socket connector contain spring contacts located at socket openings in the module casings. Each module of the plug connector contains a rigid bar which extends as a prong out of the smaller end of each plug module to fit into a socket at the smaller end of a socket module in the socket connector. Other ends of the contacts in all modules extend out of larger ends of the modules and carry screws for attaching circuit wires. The dielectric casings of all modules may be thermally bonded to the walls of the cavities in the dielectric plastic blocks.

Abstract: A synchro power amplifier and control circuit for an inductive load has a plurality of synchro leg amplifiers connected to the load. Each amplifier has an interstage transformer for deriving samples of current drawn by the load. A multiplicity of capacitors are respectively connectable in parallel with the (load) upstream of the amplifiers by switches in a circuit 10 responsive to the voltage/current phase angle of the power driving the load, to compensate for the inductance of the load.

Abstract: A heat dissipating retainer for a flat, rectangular solid state package of electronic components is made from a single piece of pliable, springy electrically conductive sheet material bent to form a generally W-shaped structure. This structure has an inner inverted U-shaped channel section open at its front, back, and bottom ends to receive the package in frictional engagement under spring tension by contact with sides of the channel section. This structure serves as a heat sink by effectively dissipating by conduction, convection and radiation, heat generated in the solid state package of electronic components.

Abstract: A motor drive assembly includes a stationary housing, a shaft rotatably carried by the housing for driving a load, a gear box rotatably carried by the shaft, and an electric motor in the gear box having a rotor coupled by a gear train to the shaft. A switch in the housing near the gear box is operated when the gear box rotates against a spring bias in response to the rotor's exerting an increased predetermined torque. The motor may have an auxiliary winding in circuit with the switch to reduce power consumed by the motor when the switch is operated. Alternatively, a solenoid may be connected to the switch to hold the rotor stationary when the motor stops. The motor may have a main drive winding which is de-energized by the switch.

Abstract: A holder assembly for miniature electronic components and method for fabricating the holder assembly comprises two superimposed metal or plastic plates having a multiplicity of centrally aligned first holes. An elastic sheet is disposed between the plates and is bonded to inner sides of the plates to form a laminated assembly. A multiplicity of other holes in the sheet, are smaller than the first holes, and are in central alignment with the first holes to define elastic annular rims. A frame is mounted around the laminated assembly. The first holes may be countersunk. The plates may be made of electrically insulative material.

Abstract: An attachment for a walking cane to serve as audible alarm producing means and as a light projection lamp. The attachment has a hollow casing for mounting onto a cane so that a vertical portion of the cane protrudes from the front section of the casing and the horizontal portion of the cane protrudes from the rear section of the casing. Inside the casing, is a switch connected in circuit with an audible alarm producing device, a lamp and batteries. The switch is operable externally of the casing for selectively sounding the alarm or lighting the lamp. The casing has quickly separable and reengageable sections providing access to the interior or the casing for servicing the batteries. The sound actuating circuit may be arranged to modify the sound produced by the alarm device to increase its attention getting effect.

Abstract: An exerciser device has a rotary crank assembly turnable in opposite selected directions and driving an endless first chain entrained on sprockets. The chain drives through a first engaged clutch when the crank assembly is turned in one direction to turn a wheel which drives a variable resistance device such as a variable delivery pump. A second chain entrained on other sprockets which are driven by the first chain when engaged by a second clutch, to drive the wheel when the crank assembly is turned in opposite direction. The wheel always turns in the same direction regardless of the direction in which the crank assembly is turned.

Abstract: A linear motion encoder which employs a potentiometer type motion detector. It includes an elongated rectangular or cylindrical housing in which are one or two rails for guiding an insulated block to move lengthwise of the housing while being moved by a shaft connected to the block via an anti-backlash spring means. The block carries wiper contacts which respectively contact a fixed resistance element and a fixed commutator strip mounted on one wall of the housing or on the rail. An analog to digital circuit may be disposed in the housing to apply a reference voltage to opposite ends of the resistance strip. The circuit takes a linearly variable analog voltage from the commutator strip when the block moves lengthwise inside the housing driven by the axially moving shaft.

Abstract: This portable steamer device has a central cylindrical casing open at opposite ends. A handle is rotatably mounted to a cylindrical cap attached to the rear end of the casing. A baffle is mounted to the front end of the casing, and has holes for emitting steam. In the casing is a heater assembly to heat water in a first chamber conically shaped body with a central aperature closes the chamber but permits water to pass into the chamber and steam to pass out of the chamber. A tube section inside a second chamber between the baffle and the body which passes steam to the baffle while any water which may inadvertently spill out of the first chamber is captured in the second chamber, thus, water cannot leak out of the device.

Abstract: A system and method for generating phase/frequency coded pulses useful in radar and similar applications, (such as simulation of multiple return of targets) by generating frequency modulated pulse compression pulses rapidly with practically no time in between. Typically, the system simulates target returns as FM sweeps or chirps to obtain an echo of a transmitted pulse having a known signature. Digital circuits are employed with finite steps connected to a digital-to-analog converter driving a radio frequency balanced modulator, to produce the desired chirp output. The system generates FM phase modulations by reading two phase history records representing cosine and sine functions in phase quadrature of a to-be-transmitted pulse.

Abstract: An adjustable seat assembly comprises a horizontal seat. A pedestal is secured to the seat in a downwardly and forwardly inclined position and is secured to a carriage having two spaced frames extending around two elevated parallel rails. One frame has a top bar normally bearing on tops of the rails and a bottom bar spaced from the undersides of the rails. The other frame has a top bar spaced from the tops of the rails, and a bottom bar abutting the undersides of the rails and carrying a catch member which normally engages in one of a plurality of holes in the underside of the rails. When the seat is raised forwardly, the catch member disengages from the hole to permit longitudinal movement of the seat carriage along the rails.

Abstract: A door assembly for a sterilizer includes a rectangular door on which is a vertical rail assembly movable horizontally toward and away from the door on threaded posts. Nuts carried by the rail assembly are rotated on the posts by sprockets entraining a motor driven chain. The rail assembly carries spring mounted axially retractable horizontal pairs of locking bars. The bars are inserted into and removed from sockets in a doorway frame by turning angularly as the rail assembly moves horizontally. A pressure responsive locking mechanism engages the sprockets to prevent their turning when the sterilizer is above a predetermined pressure. Cables carried by the locking bars actuate a switch in an alarm circuit for indicating that any one or more bars is not engaged properly in its respective socket. Limit switches stop operation of the motor when the rail assembly reaches extremes of inward and outward movement.