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| Number | Title | Issue Date |
| 4023044 | Automatic machine tool including a monitoring system An automatic punch press and monitoring system. The monitoring system includes a piezoelectric accelerometer mounted within the stationary die shoe of the punch press, and electronic circuitry including a variable gain amplifier, a detector, an integrator... | 05/10/1977 |
| 4016428 | Power switching circuit An automatic power switching circuit for controlling the application of electrical power to an electric typewriter or like apparatus. Radiated electrical energy emanating from alternating current machinery is transmitted to an input antenna by the touch o... | 04/05/1977 |
| 4002923 | Touch actuated electronic switch An electronic switch which has no moving parts and is actuated by the capacitance of an operator providing a connection between earth ground and an input to the electronics associated with the switch is disclosed. The electronic switch in the preferred em... | 01/11/1977 |
| 3992634 | Touch actuated electronic switch including protection from high potential electricity A touch actuated electronic switch is disclosed including at least one surface, accessible to the touch of a human, interconnected with an active circuit and protected against static electricity. In the preferred embodiment, the active circuit is differen... | 11/16/1976 |
| 3991329 | Touch-operation switch A touch-operation semiconductor switch is constituted by employing a switching device and a semiconductor negative resistance device comprising a complemetary connection of a depletion mode n-channel junction type field-effect transistor (hereinafter: FET... | 11/09/1976 |
| 3978352 | Control circuit A circuit for maintaining any medium between two predetermined limits, as for example, the water level in a sump. Current to drive the sump pump is gated through a programmable unijunction transistor which transistor is turned on by a signal from an upper... | 08/31/1976 |
| 3974472 | Domestic appliance control and display panel A domestic range including a touch control and display panel and digital control logic for energizing power circuits controlling the various range heater elements in response to a program entered by the user by touching certain areas of the panel. The con... | 08/10/1976 |
| 3970863 | Element and method for detecting leakage of petroleum products A styrene-butadiene-styrene block copolymer containing 50 to 70% by weight of butadiene can be used as a base material of an element capable of detecting leakage of petroleum products by detecting to the change in an electrical signal. By use of this dete... | 07/20/1976 |
| 3961201 | Patient monitoring A tape switch near the edge of a bed frame closes a warning signal circuit when the weight of a patient near the edge of the bed presses on an actuating switch arm that is cantilevered from the bed frame.... | 06/01/1976 |
| 3953770 | Safety equipment for machinery used in processing plates, etc. Safety equipment for machinery used in processing plates, etc., such as presses and shearing machines which are operated with great power, where, lest the operator's hands, fingers or some other part of the body be caught or cut because of an error in his... | 04/27/1976 |
| 3950653 | Instrument for sensing level of granular materials A cylindrical housing contains both a circuit board and a pair of capacitive sensing electrodes. The pair of electrodes are adjacent the inside wall near an end that is to be wholly or partly covered with granular material in a container. Since an electri... | 04/13/1976 |
| 3947696 | Touch actuated electronic switch A touch actuated electronic switch is disclosed including a surface, accessible to the touch of a human, interconnected with a differential amplifier. In the preferred embodiment, if increased noise immunity or noise protection is desired, a twisted pair ... | 03/30/1976 |
| 3944843 | Impedance responsive touch actuated circuit A relay switch for controlling an electronic circuit adapted to adopt two states includes first and second conducting parts spaced apart from one another by an insulating material in a configuration whereby the first and second parts can be connected by a... | 03/16/1976 |
| 3944844 | Float operated electrical switch assembly The invention is concerned with a float-operated electrical switch assembly comprising a vertical tubular housing, at least the lower end of which is arranged to be open to a liquid the level of which is to be monitored. A float is restrained to move vert... | 03/16/1976 |
| 3943376 | Occupancy detector apparatus for automotive safety systems Occupancy detector apparatus including a metallic electrode disposed to cooperate with the body of an automobile to form an occupant sensing capacitor, a reference capacitor, and an IC capacitance detecting and logic generating circuit. The IC includes a ... | 03/09/1976 |
| 3936754 | Device for detecting the opening of throttle valve of diesel engine for vehicle A device for detecting the opening of a throttle valve of a diesel engine for vehicles. The device comprises a magnetic shield adapted to be rotated responsive to the opening of the throttle valve, a magnet adapted to be inserted into the magnetic shield,... | 02/03/1976 |
| 3932774 | Electronic monitoring system with short-circuit protection A contactless motion detector, including an oscillator and an amplifier, has an energizing circuit connected across a Zener diode in a section of a voltage divider also comprising a current-sensing resistor, another section of this divider comprising an o... | 01/13/1976 |
