Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7067758 | Electric power circuit breaker comprising a connecting bar and an arcing horn An electric power circuit breaker includes a connecting bar against which an arcing horn rests with an attaching limb. The connecting bar extends through an opening of a rear wall of the housing. In order to connect the arching horn to the connecting bar, a projecti... | 06/27/2006 |
| 6335502 | Vacuum switch and vacuum switch gear using the vacuum switch In order to provide a vacuum switch suitable for a distribution and transformation system compatible between structural simplicity and reliability and a vacuum switchgear using the vacuum switch, the vacuum switch comprises switching portions installed in... | 01/01/2002 |
| 5210385 | Low voltage circuit breaker with multiple contacts for high currents To improve the electrical withstand of a low voltage circuit breaker for high currents having multiple contacts of the same length and a stationary arc guiding horn having an intermediate edge extending over a short distance in the direction of movement o... | 05/11/1993 |
| 5091616 | Self-contained switch for electrical distribution circuit A multi-pole group-operated switch is provided for electrical power distribution circuits. The switch is self-contained and suited for ease of use with various line spacings and arrangements of the distribution lines; e.g., side-by-side (horizontal plane)... | 02/25/1992 |
| 4871889 | Arcing contact assembly for a circuit breaker An assembly adapted to commutate arcs from between the main contacts of a circuit breaker to an arcing contact such that a single arc at the arcing contact can be extinguished and dispersed within an arc chute. The assembly is adapted to be pivotally atta... | 10/03/1989 |
| 4788392 | Tank type gas circuit breaker A tank type gas circuit breaker for a three-phase alternating current, comprises: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of the three hollow members; a single mechanism s... | 11/29/1988 |
| 4673779 | Low-voltage circuit breaker including a current transformer A low-voltage circuit breaker comprises a current transformer which at least partly encloses a first connecting bar and is supported by a stationary carrier independently of a second connecting bar. In the region opposite this support, the current transfo... | 06/16/1987 |
| 4614851 | Contact sequencing arrangement for rotary double break switch Stationary contacts (12) of a multi-pole disconnect or safety switch are arranged to be engaged by one of a rotatably movable bridging contact (2) before engagement of the other end thereof with a second set of stationary contacts (10). Stationary contact... | 09/30/1986 |
| 4126773 | Polyphase disconnecting switch arrangement Disclosed is a family of polyphase outdoor interrupter switch arrangements suitable for service in power systems rated up to 34.5 kv with but a single interrupting switch unit per phase. Two insulators are mounted on a base member with one insulator suppo... | 11/21/1978 |
