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| Number | Title | Issue Date |
| 5870014 | Thermally actuatable auxiliary electrical switch apparatus A thermally actuatable auxiliary switch (10, 10', 100) used with a refrigerator compressor system (60) has a generally U-shaped bimetallic element (12) mounted at one end on a base plate (16, 16', 102) and with a movable contact (28) mounted on the high e... | 02/09/1999 |
| 5867557 | Remotely controlled communication line diagnostic apparatus and method A communication line diagnostic unit (10, 10') that allows telephone central office equipment to perform a test of a communication line and determine the ability of the line as a communication medium is shown. The device is completely passive and transpar... | 02/02/1999 |
| 5861794 | Thermal circuit breaker apparatus An open ended cup shaped housing (12) has first and second spaced electric terminals (14,16) extending through the bottom wall of the housing into a switch chamber with a snap acting, current carrying disc (18) cantilever mounted on one terminal and havin... | 01/19/1999 |
| 5834943 | Apparatus and method for sensing failed temperature responsive sensors A microprocessor control (10, 24) has one or more temperature responsive thermistor sensors (20, 26, 28) used to provide temperature inputs to control operation of a temperature control system. The microprocessor control subjects the thermistor sensors to... | 11/10/1998 |
| 5816828 | Socket A socket (2, 52) for attachment to a printed substrate (10, 60), has a central aperture therethrough. A connective part (3, 53) including a flexible insulative sheet (8, 58) is provided to cover the aperture and act as an electrically connective interface... | 10/06/1998 |
| 5814779 | Fluid pressure responsive electric switch A fluid pressure responsive electric switch (100) is shown in which first and second discrete electrical switches are controlled. A first movable support ring (122) mounts first and second snap acting discs (120a, 124a) on opposite sides thereof, the disc... | 09/29/1998 |
| 5808255 | Fluid pressure responsive electric switch A fluid pressure responsive electric switch (10) is shown having an elongated base (12) in which first and second terminals (34, 48) are mounted by dropping them into respective slots (26, 28). The terminals are provided with tabs (38, 52) to engage with ... | 09/15/1998 |
| 5807104 | Test socket for detachable IC chip A socket with a main socket body 10 for use in a burn-in test of a bare chip 80 with a large number of contact connectors BP is provided with a positioning plate 42 in the top of the socket body 10. This positioning plate has a plurality of through holes ... | 09/15/1998 |
| 5792954 | Condition responsive sensor A condition responsive capacitive transducer, such as an accelerometer, is shown using a material system having refractory metal for the sensing element and glass material for a supporting substrate. The refractory metal is preferably tungsten, tantalum o... | 08/11/1998 |
| 5777468 | Variable differential transformer system and method providing improved temperature stability and sensor fault detection apparatus A variable differential transformer system (10), both linear and rotary (L/RVDT) includes a primary coil (12) drive by a primary drive (20) having a triangle wave generator whose frequency is set by an external frequency control (Rosc and C | 07/07/1998 |
| 5767670 | Method and apparatus for providing improved temperature compensated output for variable differential transformer system A variable differential transformer system (10), both linear and rotary (L/RVDT) includes a primary coil (12) drive by a primary drive (20) having a triangle wave generator whose frequency is set by an external frequency control (Rosc and C | 06/16/1998 |
| 5740594 | Method for making a fluid pressure transducer A capacitive fluid pressure transducer is shown formed of a monolithic ceramic body (10) having a cavity located between a diaphragm portion (12) and a base portion (14). Opposed capacitor plates (22, 24) are disposed on opposed surfaces of the diaphragm ... | 04/21/1998 |
| 5723915 | Solid state power controller A solid state power controller for switching power on and off to an electrical load which also serves as a circuit protection device protecting the load and/or the wire connected between the load output terminal of the controller and ground from thermal d... | 03/03/1998 |
| 5688128 | Detachable socket for an IC chip A socket for mounting an electrical part such as an IC chip 60 in a freely detachable manner in which the electrical part 60 has a plurality of connective terminal parts of a prescribed pitch, has socket terminals 50 fixed in the socket 10 and a plurality... | 11/18/1997 |
| 5655709 | Electrical control system for relay operation responsive to thermostat input having improved efficiency A temperature control system is shown in which a thermostat circuit is combined with a power supply to produce a higher anticipator current for a W1 signal while reducing power consumption and heat generation of the circuit. A first relay power signal is ... | 08/12/1997 |
| 5653379 | Clad metal substrate Ceramic to metal stock or substrates having a relatively large and thick metal core and a relatively thin ceramic layer or layers are bonded to the metal core or a selected portion thereof by providing a metal core material having a temperature coefficien... | 08/05/1997 |
| 5628635 | Test socket for an integrated circuit A socket has a main socket body 10 and a plurality of contact members 12 adapted for making electrical contact with electrical parts (20, 30) of both small outline package (SOP) type and small outline J-leaded package (SOJ) type. The contact members 12 ha... | 05/13/1997 |
| 5617001 | A.C. motor starting control circuit utilizing triggerable semiconductor switching device A starting circuit for use with single phase induction motors such as capacitor run and capacitor start, capacitor run motors is shown having a triggerable semiconductor (Q1, Q2 and Q3) serially connected to the auxiliary winding (AW) across the power sup... | 04/01/1997 |
| 5607522 | Method of making electrical contact material An electrical contact material having metal oxide particles dispersed in a silver metal matrix and having an easily brazeable backing layer is made free of internal oxide depletion zones by bonding a conventional internally oxidizable silver alloy to a th... | 03/04/1997 |
| 5601742 | Heating device for an internal combustion engine with PTC elements having different curie temperatures A heating device for heating an item such as a carburetor uses a first PTC heating element 12 positioned compactly within a housing 10 which is directly adjacent the item to be heated. A Second PTC element 14 having a great electrical resistance increase ... | 02/11/1997 |
| 5585990 | Electronic motor protection apparatus An electronic motor protection system is shown having a power supply usable with multivoltage supplies and providing protection from over-temperature conditions caused by various fault conditions. The system also has optional features of a time delay for ... | 12/17/1996 |
