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| Number | Title | Issue Date |
| 4866408 | Multiphase motor protector apparatus A three phase hermetic protector for electrical apparatus has a pair of terminals extending through a header with first and second elongated heaters mounted on the terminals and extending away from the header. A rigid support is attached to the header bet... | 09/12/1989 |
| 4866365 | Supplemental automotive vehicular heater system and method of providing same A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's alternator and a positive temperature coefficient (PTC) of resistivity heater electrically con... | 09/12/1989 |
| 4865250 | Automotive oil level control valve apparatus A fluid level control valve has a base with an aperture formed therein. A cover is slidingly disposed over the aperture and is biased by a thermostatic element in a direction tending to close the aperture. The thermostatic element is an elongated strip ha... | 09/12/1989 |
| 4866559 | Solid state circuit protector A protective circuit capable of remotely switching power to a load on and off and including an electrothermal sensor system having a heating element of predetermined resistance in series with the load and source of power whereby the temperature of the hea... | 09/12/1989 |
| 4862306 | Combination motor protector and starter apparatus A motor protector and starter particularly suited for refrigeration compressor motors are mounted in the recess of a first housing portion with their resilient female sockets disposed in alignment with a pin receiving aperture. Leads are attached to termi... | 08/29/1989 |
| 4861953 | Pressure switch apparatus having improved longevity and widened tolerence for location of stationary contact An automotive transmission control is shown having pressure switches to sense the state of actuation of solenoid valves to provide logic signals to a microprocessor type of transmission control. The pressure switches, which sense the pressure of hydraulic... | 08/29/1989 |
| 4853503 | Pressure switch apparatus having improved longevity and widened tolerance for location of stationary contact An automotive transmission control is shown having pressure switches to sense the state of actuation of solenoid valves to provide logic signals to a microprocessor type of transmission control. The pressure switches, which sense the pressure of hydraulic... | 08/01/1989 |
| 4843295 | Method and apparatus for starting single phase motors A solid state starting system for electric motors having main and start windings of the capacitor start, capacitor start-capacitor run and split phase types uses a triac serially connected to the start winding. The system turns on the triac upon energizat... | 06/27/1989 |
| 4837545 | Miniature circuit breaker with improved longevity A circuit breaker device has a chamber in which is disposed a single break contact system using low contact resistance material mounted on movable and stationary supports arranged in a loop configuration in order to direct arcs between the contacts throug... | 06/06/1989 |
| 4834053 | Internal combustion engine An internal combustion engine is provided with a heat sink 6 with thermistor pellets 10, 22, 32 of PTC material. This heat sink is held in position inside a through passage for the fuel mixture through the action of clamp means 14; 17; 23; 33 which press ... | 05/30/1989 |
| 4827242 | CMOS/bipolar integrated circuit A dual function sensor particularly useful with vehicular coolant systems indicates when a coolant liquid becomes corrosive to such cooling system materials as well as when the liquid falls to a low level condition. A reference and a sense electrode are u... | 05/02/1989 |
| 4827233 | Miniature circuit breaker with improved longivity A circuit breaker device has a chamber in which is disposed a single break contact system using low contact resistance material mounted on movable and stationary supports arranged in a loop configuration in order to direct arcs between the contacts throug... | 05/02/1989 |
| 4812799 | Miniature circuit breaker with improved longevity A circuit breaker device has a chamber in which is disposed a single break contact system using low contact resistance material mounted on movable and stationary supports arranged in a loop configuration in order to direct arcs between the contacts throug... | 03/14/1989 |
| 4793188 | Lubrication sensor apparatus A pressure sensor probe has a first port connectable to a relatively low pressure source in a compressor crankcase and a second port connectable to a relatively high pressure source at the output of an oil pump. A shuttle is slidably disposed in a bore an... | 12/27/1988 |
| 4794214 | Fluid pressure responsive electrical switch A fluid pressure switch is shown including first and second discs each having convex-concave surface configurations on opposite sides thereof adapted to invert its configuration upon being subjected to selected pressure levels. A slidably disposed plural ... | 12/27/1988 |
| 4783000 | Temperature responsive flow control valve apparatus A temperature responsive valve particularly adapted for use in a manual valve of a vehicular automatic transmission control is shown in which the temperature responsive valve has a generally cylindrical housing with a reduced diameter section and a cylind... | 11/08/1988 |
| 4780697 | Miniature circuit breaker with improved longevity A circuit breaker device has a chamber in which is disposed a single break contact system using low contact resistance material mounted on movable and stationary supports arranged in a loop configuration in order to direct arcs between the contacts throug... | 10/25/1988 |
| 4768284 | A method for making low profile microswitches, particularly useful for keyboards A keyboard unit is shown having a substrate in which portions of the substrate are physically displaced to provide a cavity, an embossment and a plurality of protuberances for each switching station. The embossment, in registry with a button contact area,... | 09/06/1988 |
| 4758876 | Thermal protective device with bimetal for semiconductor devices and the like A thermal protective device for semiconductor devices and the like comprises a housing of electrically insulative plastic material made in cup form having at the open end a seat for lodging a bimetallic disc and means for applying the cup to the semicondu... | 07/19/1988 |
| 4758695 | Automotive transmission control system and improved longevity therefor An automotive transmission control is shown having pressure switches to sense the state of actuation of solenoid valves to provide logic signals to a microprocessor type of transmission control. The pressure switches, which sense the pressure of hydraulic... | 07/19/1988 |
| 4757165 | Dual condition responsive electrical switch A dual condition responsive switch is shown including first and second discs each having convex-concave surface configurations on opposite sides thereof adapted to invert its configuration upon being subjected to selected conditions. A motion transfer mem... | 07/12/1988 |
| 4754251 | Thermostatic electric switch and thermal biasing assembly therefor A housing has a switch chamber in which an electric switch is placed and a recess in which is received a snap acting, thermally responsive disc which actuates and deactuates the switch upon snapping from one configuration to another. A thermal biasing ass... | 06/28/1988 |
| 4740966 | Analog input circuit for microcontroller apparatus A plurality of differential analog input channels are multiplexed into a programmable gain amplifier providing four input ranges. The circuit is self-calibrating under microprocessor control with periodic measurements taken of internal channels for analog... | 04/26/1988 |
| 4726452 | Fluid flow control apparatus A shock absorbing mechanism has a fluid filled pressure chamber with a piston mounted therein along with a restrictive orifice leading to an outer chamber. When shock is transmitted by the piston, fluid is forced through the opening against compressed gas... | 02/23/1988 |
| 4724605 | Method for making area actuated switch Disclosed is an area actuated switch which can be used, by way of example, in a keyboard for a calculator, learning aid or the like. An area actuated switch array is formed using two insulating sheets made of polyester or polycarbonate; the insulating she... | 02/16/1988 |
| 4717813 | Multipassage, multiphase electrical heater A resistor particularly useful as a multiphase, self-regulating fluid heater has passages extending through a body of ceramic resistance material of positive temperature coefficient of resistivity (PTC) for heating fluid adapted to pass therethrough. Seve... | 01/05/1988 |
| 4715823 | Plug-in socket assembly for integrated circuit package A Plug-in socket assembly for use with a semiconductor integrated circuit package has a plurality of contact elements mounted on a support member. The contact elements are each formed with a spring portion, an elongated arm portion merging out of the spri... | 12/29/1987 |
| 4700032 | Keyboard apparatus and method for making same A keyboard is assembled by providing first and second electrically conductive strips of layers and first and second electrically insulative strips of layers, forming the layers into a desired configuration and laminating them together with the respective ... | 10/13/1987 |
| 4680753 | System and method for controlling network bus communications for input-output interlocking information among distributed programmable controllers A control system for controlling an industrial process includes a network of a plurality of distributed programmable controllers or nodes coupled serially to a communications bus on either a single or dual media by means of a shielded twisted wire pair ca... | 07/14/1987 |
| 4673844 | Starter circuit for a fluorescent tube lamp A starter circuit for a fluorescent tube lamp is connected between the cathode heaters of the tube to provide an initial heating current and then changes to a high impedance to ignite the tube. The circuit is fed by raw rectified a.c. and has a main thyri... | 06/16/1987 |
| 4672231 | Control circuit particularly adapted for use with lubrication sensor apparatus A pressure sensor probe has a first port connectable to a relatively low pressure source in a compressor crankcase and a second port connectable to a relatively high pressure source at the output of an oil pump. A shuttle is slidably disposed in a bore an... | 06/09/1987 |
| 4666582 | Coolant condition sensor apparatus A dual function sensor particularly useful with vehicular coolant systems indicates when a coolant liquid becomes corrosive to such cooling system materials as well as when the liquid falls to a low level condition. A reference and a sense electrode are u... | 05/19/1987 |
| 4662232 | Coolant condition sensor apparatus A dual function sensor particularly useful with vehicular coolant systems indicates when a coolant liquid becomes corrosive to such cooling system materials as well as when the liquid falls to a low level condition. A reference and a sense electrode are u... | 05/05/1987 |
| 4654617 | Magnetic circuit control apparatus A remotely controlled circuit control device has first and second load contact assemblies movable into circuit engagement and circuit disengagement positions relative to one another in which one load contact assembly is operatively connected to a solenoid... | 03/31/1987 |
| 4646051 | Thermostatic electric switch and thermal biasing assembly therefor A housing has a switch chamber in which an electric switch is placed and a recess in which is received a snap acting, thermally responsive disc which actuates and deactuates the switch upon snapping from one configuration to another. A drop in thermal bia... | 02/24/1987 |
| 4646195 | Motor protector particularly suited for use with compressor motors A motor protector of the type having a snap acting thermostatic element is shown particularly adapted for use with compressor motors in which a conventional three pin header is mounted on the compressor casing to allow electrical energization of the motor... | 02/24/1987 |
| 4641121 | Sealed electrical switch and mounting therefor A sealed thermostatic electric switch has a heat responsive thermostatic element disposed in good heat transfer relationship with the closed end of a heat conductive cup shaped member. The side wall of the cup shaped member extends upwardly from the close... | 02/03/1987 |
| 4633579 | Method for making a pressure responsive switch A hermetically sealed, creep acting pressure switch has a sensor assembly comprising a bulged metallic membrane welded between a port fitting and a support. A switch assembly, attached to the sensor assembly, includes a housing which has a switch chamber ... | 01/06/1987 |
| 4630021 | Low cost time delay relay assembly A time delay relay (TDR) is formed by capturing a thermostatic switch between identical shells of an outer housing and suspending the switch in a switch cavity to minimize heat loss to the outer housing. The shells are bonded together to form a unitary ho... | 12/16/1986 |
| 4629944 | Starter circuit for a fluorescent tube lamp A starter circuit for a fluorescent tube lamp is connected between the cathode heaters of the tube to provide an initial heating current and then changes to a high impedance to ignite the tube. The circuit is fed by raw rectified a.c. and has a main thyri... | 12/16/1986 |
