Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 6750743 | Integrated thermal and magnetic trip unit A circuit breaker for a multi-pole electrical distribution circuit includes a cassette associated with each pole in the multi-pole electrical distribution circuit. Each cassette includes a housing, a pair of electrical contacts disposed in the housing, and a thermal... | 06/15/2004 |
| 6696857 | High speed CMOS dual modulus prescaler using pull down transistor The present invention provides a circuit and a method for high speed prescaler circuits which utilize pull-down transistors in the critical feedback path. This invention contains a high speed CMOS dual modulus prescaler circuit made up of data or D-flip f... | 02/24/2004 |
| 5629662 | Low energy memory metal actuated latch A low energy electromechanical interface for a circuit breaker, magnetic latch, shunt trip device, undervoltage relay, contactor, or other electric switch utilizes a memory wire to initiate the tripping of the circuit breaker. The memory wire is mechanica... | 05/13/1997 |
| 4814737 | Overload relay The invention relates to an overload relay with input and output leads provided on opposite side surfaces of the housing as well as auxiliary switch terminals associated with the front side. The break contact terminal (17, 18) are provided here at the sam... | 03/21/1989 |
| 4350965 | Multi-pole circuit breakers A circuit breaker for interrupting current through plural electrical circuits has a separate current responsive circuit path for each electrical circuit. Each path includes a manually operable latching mechanism capable of engaging and disengaging a pair ... | 09/21/1982 |
| 4114122 | Circuit breaker A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates novel means for mounting and coupling circuit breaker units to achieve multipole operation. An actuator in each pole has a shaft extending through a h... | 09/12/1978 |
| 4090157 | Operating handle means for stacked circuit breaker modules Single pole circuit breaker modules having identical current carrying elements as well as identical fault responsive trip means and spring powered contact operating mechanism, are stacked side-by-side. A transverse tie rod extends through the housings of ... | 05/16/1978 |
