Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7372356 | Concealed adjustable temperature switch A concealed adjustable temperature switch includes a fixed plate, an adjusting block threadedly engaged with a screw hole of the fixed plate, a bimetal plate, and a metal plate. Mounted on the adjusting block are upper and lower positioning rings and a fixing ring b... | 05/13/2008 |
| 7109840 | Protector for electrical apparatus A protector (10) particularly useful for wye-connected three phase electrical motors has a header (12) mounting first and second terminal pins (14) to which L-shaped pin heaters (16) are mounted along with stationary electrical contacts (... | 09/19/2006 |
| 7075403 | Motor protector particularly useful with hermetic electromotive compressors A protector (1) has a metal header (30) that mounts a first terminal (31) and a second terminal (32) electrically isolated from one another. A metallic housing (10) is fixed to the header (30) and forms a chamber. A stationa... | 07/11/2006 |
| 6515571 | Thermal protector A thermal protector is configured so that a raised portion 23 and a lowered portion 27 with the attachment face of a movable contact 21 being the reference are provided at the rear of and close to the movable contact 21 on a movable plate 20, and a tongue... | 02/04/2003 |
| 6448883 | Switch having an end of service position in its open state A switch has a temperature-dependent switching mechanism with a stationary contact element; a movable contact element coacting with the stationary contact element; and a bimetallic element, having a predetermined functional service life, that as a functio... | 09/10/2002 |
| 6252492 | Condition-responsive electric switch mechanism A condition-responsive electric switch mechanism for use in controlling a compressor of a refrigeration appliance. The switch mechanism includes first, second and third terminals, an actuator movable as a function of a detected condition and a bistable sp... | 06/26/2001 |
| 5585774 | Condition-responsive electric switch mechanism A condition-responsive electric switch mechanism having a snap-acting bistable spring switch element carrying a movable contact, and an actuator movable in response to a detected condition to operate the bistable spring switch element. The spring switch e... | 12/17/1996 |
| 5525952 | Switchblade A one-piece resilient switchblade includes contacts on its opposite end portions. A mounting arm extends transversely of the switchblade and is attached to a switchcase under bending stress for biasing the switchblade against a fulcrum. The mounting arm t... | 06/11/1996 |
| 4539545 | Thermal switch In a thermal switch for temperature control of electrical heating apparatus, a contact reed is integral with a terminal and is rigid except for a relatively short longitudinal area so that, when the contact reed is acted upon by a bimetallic disk spring, ... | 09/03/1985 |
| 4521760 | Miniaturized circuit breaker A circuit breaker comprises a two piece metal enclosure, a cover and a base. Disposed within the enclosure is a PMB bimetal which is fastened to a step in the cover. The opening time of the circuit breaker can be adjusted by means of the step.... | 06/04/1985 |
| 4313047 | Combined thermostatic control and thermal fuse overtemperature protector for electrical heating appliances An overtemperature protector for an appliance having an electrical heating element, the overtemperature protector being formed basically of just a spring blade positionable to bring a contact on the surface of the blade into circuit-energizing engagement ... | 01/26/1982 |
