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US 4,213,059 AGranted
Power switching circuit
AssigneePDM Electrical Products Ltd.
InventorPeter Deacey
Life of this patent
Estimating the term…
Abstract
A power switching circuit for a building which allows remote operation of individual relatively small load portions such as lighting areas, climate control apparatus etc. The entire building can also be powered up or down remotely avoiding current surges by the provision of a motor driven contact arm making contact sequentially with all remote control relays.
Claims6
A power switching circuit comprising
- (a) a base plate carrying a first annular slip ring having a gap forming a break in continuity,
- (b) an isolated contact on the base plate within the gap at the same radius as the ring,
- (c) a second continuous slip ring concentric with the contact ring,
- (d) a contact arm driven by a motor connecting the second ring to the contact ring,
- (e) means connecting the first ring and the second ring in series with a motor across a source of a.c. current, whereby current can be fed to the motor until the contact arm reaches the gap,
- (f) a third continuous annular slip ring concentric with the first and second rings,
- (g) a multiplicity of contacts in a ring at equal radii from the centre of the first and second rings,
- (h) means connecting the third slip ring and each of the contacts in sequence as the motor rotates, whereby external circuits connected individually to each of the contacts are energized once as the motor rotates, the motor stopping when the contact arm reaches said gap.
5 more elements
Dependencies are inferred from the claim text.