US 4,760,278 AGranted

Transfer switch

OwnerRobert G. Thomsoninventor

Life of this patent

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Abstract

The transfer switch assembly typically automatically transfers electrical loads from a normal electrical power source to an emergency electrical power source upon reduction or loss of normal power source voltage. It can also automatically re-transfer the load to the normal power source when the normal voltage has been restored within acceptable limits. The device includes a rotor and couplers for cooperating with switch toggles of circuit breakers to actuate the circuit breakers. First and second links connect the rotor to the couplers. The links have outer ends connected to the couplers, and inner ends hingedly connected to the rotor at positions spaced circumferentially apart relative to the rotor axis. In this way, rotation of the rotor in one direction moves the couplers to open one circuit breaker and, after a short period of time, to close the remaining circuit breaker so that one circuit breaker opens prior to closing the other circuit breaker. The transfer switch can also be actuated manually.

Claims18

Dependent claims

A transfer switch assembly having:

(a) a body and a rotor means mounted for rotation about a rotor axis relative to the body,
(b) first and second coupling means for operatively connecting first and second switch toggles of first and second circuit breakers to move the switch toggles to actuate the circuit breakers, the coupling means being mounted for movement relative to the body,
(c) first and second link means connecting the rotor means to the first and second coupling means respectively, the link means having outer ends connected to the coupling means and inner ends hingedly connected to the rotor means at positions spaced circumferentially apart relative to the rotor axis,
so that the rotation of the rotor means in one direction moves the coupling means to open one circuit breaker, and after a period of time, to close the remaining circuit breaker, so that one circuit breaker opens prior to closing the other circuit breaker to ensure that an electrical load is momentarily isolated from first and second power sources associated with the first and second circuit breakers respectively.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/076,747Filed 23 Jul 1987
Granted: 26 Jul 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01H 9/26
Interlocking, locking, or latching mechanisms: for interlocking two or more switches
H01H 3/26
Power arrangements internal to the switch for operating the driving mechanism: using dynamo-electric motor
H01H 3/46
Driving mechanisms, i.e. for transmitting driving force to the contacts: using rod or lever linkage, e.g. toggle
H01H 2003/323
Driving mechanisms, i.e. for transmitting driving force to the contacts: the mechanisms being adjustable