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| Number | Title | Issue Date |
| 7218200 | Manual-reset thermostat A movable operating member 5 is swingably borne by the base 1, and its distal end is moved upward by allowing its proximal end 5b to be pressed downward. The movable contact 3 is separated from the stationary contact 2 upwar... | 05/15/2007 |
| 6819216 | Thermostat A thermostat includes a wall plate unitarily molded of thermoplastic resin, a first metal plate holding a temperature sensing section, and a second metal plate holding a cam shaft. A fulcrum of a lever and a fulcrum of adjusting plate are protected by the wall plate... | 11/16/2004 |
| 6617954 | Tamper resistant temperature controller for a gas-fired heating device A device for preventing the inadvertent rotation of a temperature selection dial associated with the temperature controller of a water heater. The device includes a spring-loaded prong that extends across the face of a rotatable dial so as to prevent rota... | 09/09/2003 |
| 6496097 | Dual circuit temperature controlled switch A temperature responsive switch includes a housing, an actuator arm for movement in response to temperature conditions, a movable contact, and an adjustable contact connected to a auxiliary terminal for completing an auxiliary circuit. The movable contact... | 12/17/2002 |
| 6064294 | Temperature switch, particularly adjustable temperature regulator A temperature regulator operating with a hydraulic expansion capsule or diastat (5) has a lever mechanism (30) for force transmission between the diastat and the switch spring (21) of a snap switch (20). For protecting the switch spring against overloadin... | 05/16/2000 |
| 5621389 | Apparatus for detecting a fire having a liquid filled sensor tube and compensation for changes in ambient temperature A fire detection system includes an elongated liquid filled tube with a fluid coupled alarm switch, with a flexible diaphragm which senses a change from the liquid to vapor phase in the presence of an overheat or fire condition to provide an alarm. To pre... | 04/15/1997 |
| 5276433 | Methods and apparatus for temperature sensing A temperature sensor has a flexible nylon tube connected by a fluid-tight coupling to a metal bellows within a metal housing. The interior of the tube and bellows is filled with a pressurized liquid whose critical temperature corresponds to a threshold te... | 01/04/1994 |
| 5189269 | Fluid pressure switch having a Belleville washer A resilient diaphragm operated pressure switch has a Belleville spring washer with a dished spring disc nested in the center and supported on the inner periphery of the washer resisting movement of the diaphragm. An actuator member is spring biased agains... | 02/23/1993 |
| 5162774 | Remotely setting thermostatic switch assembly and refrigeration system employing same A remotely changeable thermostat for a refrigeration or air conditioning system and method and system employing same. The thermostat has a fluid filled capsule with a diaphragm movably responsive to fluid expansion and contraction for actuating, via lever... | 11/10/1992 |
| 5101188 | Condition responsive switching apparatus A condition responsive switching apparatus with an alarm feature for use in refrigeration appliances, such as freezers or the like. The switching apparatus includes a contact operator which moves between first, second, and third positions in response to t... | 03/31/1992 |
| 4937549 | Condition responsive switching apparatus A condition responsive switching apparatus with an alarm feature for use in refrigeration appliances, such as freezers or the like. The switching apparatus includes a contact operator which moves between first, second, and third positions in response to t... | 06/26/1990 |
| 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 |
| 4851627 | Compact pressure sensitive switch for use in detecting fluid pressure changes This pressure sensitive switch includes a bellows made of corrosion resistant material and with a hollow cylindrical body, which defines a pressure receiving surface on the outer surface of its one closed end portion, and with an open end which is fixedly... | 07/25/1989 |
| 4841271 | Trip-free resetting mechanism for an on-off unit A trip-free mechanism for resetting an on-off unit, such as a thermostat (1), breakable by the tripping of an actuator element (3) from a first condition to a second condition comprises a resetting button (9) engageable to apply a resetting force to the a... | 06/20/1989 |
| 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 |
| 4698612 | Temperature limiting control A thermostatic switch assembly with a diaphragm responsive to pressure generated in a fluid filled temperature sensing bulb-and-capillary. The diaphragm contacts and moves a pivoted lever having a beam spring cantilevered beam spring adjustably mounted th... | 10/06/1987 |
| 4651140 | Fire detector An improved fire detector vented to atmosphere, capable of closing or opening an alarm circuit on the happening of either two events, when the rate of rise of the temperature of the ambient atmosphere exceeds a predetermined prescribed rate of rise of tem... | 03/17/1987 |
| 4565989 | Temperature control apparatus A temperature control apparatus, for example a hydraulic temperature regulator or thermal cut-out, comprises three interchangeably interconnected subassemblies, namely: a box-like sheet metal casing with an adjusting mechanism; an operating member compris... | 01/21/1986 |
| 4532490 | Fail safe high limit control Temperature limit control having a normally closed contact switch secured to a formed cup with vacuum operated formed diaphragm seal to cup bottom, contacts open on reduced vacuum as by boiling thermal fluid in the linear capillary tube welded to the cup ... | 07/30/1985 |
| 4490708 | Condition responsive electric switch system, electrical switching device and method of operation thereof A condition responsive electric switch system comprises switch means which includes at least one set of contact elements defining a preselected open position, a preselected closed position, and a preselected initial contact make-break position, disposed b... | 12/25/1984 |
| 4408178 | Thermostatic switch The chamber in the metal body is filled with Freon which starts to vaporize at a temperature below the operating temperature of the switch. The vapor pressure increases substantially as the temperature rises above the refrigerant boiling point and acts ag... | 10/04/1983 |
| 4335283 | Temperature compensated fill valve/pressure switch A device (10) for filling a pneumatic tire and sensing the air pressure therein has a check valve (20) disposed within a valve stem (126b) and a pressure sensing switch which is temperature compensated to adjust for air pressure changes within the tire du... | 06/15/1982 |
| 4262274 | Thermal electric switch A thermal electric switch having a thermally expansible material operating on an elastomeric diaphragm to operate a switch wherein the switch is an electrically conductible spring element and is operated by a force transmitting arrangement from the diaphr... | 04/14/1981 |
| 4187684 | Thermally responsive power elements with multiple vapor/gas filled capsules and hydraulic fluid transmissions A thermally responsive power device is disclosed employing a thermally sensitive unit in which are housed multiple vapor/gas filled capsules which expand and contract in response to temperature changes. The thermally responsive element is connected in a c... | 02/12/1980 |
| 4072220 | Apparatus for controlling actuating fluid pressure on vehicular friction clutch with compensation for decrease in friction coefficient at elevated temperature A control apparatus provided with an electromagnetic valve assembly to selectively change the variation rate of a fluid pressure to actuate the clutch in dependence on the degree of opening of the throttle valve for the vehicular engine, a pulse-generatin... | 02/07/1978 |
| 4072933 | Fire heat detector and/or burglar alarm A detecting device for detecting heat due to the presence of fire for example. The detecting device includes an open-ended chamber closed by a resilient diaphragm. The diaphragm engages the open end to permit respectively the passage of air via an annular... | 02/07/1978 |
| 4038613 | Temperature responsive devices An expansible box or bellows or diaphram box comprises two corrugated metal sheets secured together in a sealed manner about their rims. The box is arranged between a transmission lever and an adjusting member. A connection piece has a flange portion whic... | 07/26/1977 |
| 3931483 | Multiple circuit control switch having articulated cascaded operating mechanism An electrical switch having a plurality of means adapted to be movable generally sequentially for switching power through the electrical switch. A plurality of means are adapted to be conjointly and relatively movable disposed in cascaded articulated rela... | 01/06/1976 |
