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| Number | Title | Issue Date |
| 7170388 | Thermostat A thermostat has a switch, a temperature sensor, a lever, a spring, and a control plate. The sensor generates a force to operate switch in response to the ambient temperature. The lever having an arm turns with the force from the sensor to open/close contacts of the... | 01/30/2007 |
| 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 |
| 5467523 | Method for assembling and calibrating a condition-responsive electric switch mechanism A method for assembling a condition-responsive electric switch mechanism having a snap-acting bistable spring switch element. The switch mechanism is assembled substantially in its entirety except for the capillary tube. The switch mechanism is then calib... | 11/21/1995 |
| 5392637 | Method of testing for leaks in a closed fluid filled system and system tested by such method A method of testing for leaks in a closed fluid filled system and a system tested by such method are provided, the method comprising the steps of disposing the system in a chamber, disposing a fluid in the chamber under a pressure so that if a leak path o... | 02/28/1995 |
| 5303576 | Method of testing for leaks in a closed fluid filled system and system tested by such method A method of testing for leaks in a closed fluid filled system and a system tested by such method are provided, the method comprising the steps of disposing the system in a chamber, disposing a fluid in the chamber under a pressure so that if a leak path o... | 04/19/1994 |
| 4864270 | Thermostatic controller for waterbed heater A thermostatic controller for a waterbed heater of the type where the water bladder is enclosed in a foam casing with the controller disposed between the bladder and the side of the casing. The controller has a liquid filled bulb and capillary temperature... | 09/05/1989 |
| 4721937 | Temperature responsive switch A temperature responsive switch includes a housing(1) which can be secured to the engine block of a motor vehicle and a temperature sensitive element (4) which is in contact with the cooling medium of the motor. In order to guarantee switching dependent o... | 01/26/1988 |
| 4716277 | Electric hotplate A large electric hotplate for restaurants and the like is heated by tubular heaters, which are placed in slots on the bottom of a cast hotplate body. An insulation with metal cover plates and a lower plate dish ensures the necessary pressing and thermal i... | 12/29/1987 |
| 4706259 | Mounting and isolation system for tuning fork temperature sensor Prior mounting systems for tuning fork temperature sensors have resulted in unpredictable activity dips within the sensor operating ranges. This problem is eliminated by the mounting and isolation system (32) of the present invention that is adapted to mo... | 11/10/1987 |
| 4565920 | Fail safe thermal control device This invention relates generally to thermal control apparatus wherein a change in temperature is transmitted from a sensing bulb through a capillary to a control device. More particularly this invention is related to a novel, fail-safe control device for ... | 01/21/1986 |
| 4510480 | Thermostat with temperature pull-down facility A thermostatic switch unit for controlling a freezer or, for example, refrigeration apparatus in automotive air conditioning, includes a switch (1) which is acted upon by a thermostat mechanism responsive to the working temperature of the evaporator so as... | 04/09/1985 |
| 4491821 | Differential temperature control A differential temperature control uses a first temperature expansion element for driving a first pivoted lever supporting a selectively operable switch and a second temperature expansion element for driving a second pivoted lever for operating the switch... | 01/01/1985 |
| 4429295 | Variable impedance current limiting device A current limiting device including a housing in which a chamber is formed. A pair of spaced electrical terminals are located at opposite ends of the housing to be disposed in communication with the chamber. An electrically conductive fusible metal is dis... | 01/31/1984 |
| 4194102 | Condition responsive electrical switch construction and parts and methods therefor A condition responsive electrical switch construction having a frame carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by the frame and is operatively associated... | 03/18/1980 |
| 4160225 | Temperature responsive control device with improved hydraulic diaphragm A temperature responsive control device is provided for controlling an electric oven. The device is comprised of a housing which contains an electrical switching means which is controlled by a temperature sensitive expansible member through a snap-acting ... | 07/03/1979 |
| 4112765 | Expansion diaphragm-type temperature sensor A temperature sensor includes a liquid-filled sensor tube, an expansion diaphragm assembly and a capillary tube maintaining communication between the sensor tube and the diaphragm assembly for introducing into the diaphragm assembly temperature-dependent ... | 09/12/1978 |
| 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 |
| 3946175 | Magnetic pressure indicator for a container A temperature compensated pressure indicator adapted to be mounted within a pressure container includes a reservoir housing and housing member welded together to form a secondary pressure chamber. A bellows member is hermetically mounted within the second... | 03/23/1976 |
