Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7324876 | System for remotely controlling energy distribution at local sites A power management system and associated method includes provision of local wireless energy control units at remote sites for controlling power delivery to customer loads, and a central station with a wireless transmitter for broadcasting commands to the wireless en... | 01/29/2008 |
| 7265652 | Controllable electronic switch A controllable electronic switch for, e.g., controlling power distribution comprises a deformable member such as a bimetal arm that can be deformed to break an electrical path. The deformable member may be anchored at one end and in controllable contact with an elec... | 09/04/2007 |
| 4987336 | Reversible short-circuit and the use of said short-circuit in a photoelectric tube A reversible short circuit device in the form of a metal loop. The metal loop has a first base side which forms a first contact. Extending from the base side are second and third generally parallel sides. The second side includes a contact portion for eng... | 01/22/1991 |
| 4851804 | Thermo-activating breaker A thermally actuated switch having a bi-metal switch arm carrying a contact, a cooperating contact, a heating resistor and a holding resistor. The switch is enclosed in a sealed housing and circuit connections extend from the switch contacts, heating resi... | 07/25/1989 |
| 4570144 | Thermally actuated variable-rating circuit breaker having adjustable heat sink means A heater strip (12) is disposed in spaced relation to a temperature responsive actuator element (20) for indirectly heating that element in response to current flow in the heater (12). An adjustable heat sink (22) is disposed in spaced proximity to the ac... | 02/11/1986 |
| 4365225 | Time delay relay with spring clips A time delay relay has a switch assembly, a spring terminal assembly, and an electrical resistance heater unit of an inexpensive construction held together in a reliable and economical manner by a pair of easily mounted metal spring clips. The clips have ... | 12/21/1982 |
| 4045757 | Thermostatic switch The switch includes a generally J-shaped, bimetallic switch arm having two, spaced, parallel legs, one of which is longer than the other. The shorter leg is welded at its outer end to a metal boss, which is formed on the face of a mounting bracket, and th... | 08/30/1977 |
| 3965387 | Electric lamp and thermal switch therefore An improved thermal switch permitting large temperature excursions beyond the design closure temperature without stressing the switch material beyond its elastic limits. It combines a bimetal portion with a spring portion through which movement is transmi... | 06/22/1976 |
| 3962664 | Current protector A current sensing, self-heating device for protecting equipment against abnormal current levels which is automatically resettable under mild overcurrent conditions and nonresettable under severe overcurrent conditions. The device comprises a thermostat me... | 06/08/1976 |
