Power supply device for controlling automatic door

Details Power supply device for controlling automatic door Power supply device for controlling automatic door

1994-06-13

1997-01-14

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

49370, H02T 700, E06B 342

Patent

active

055943160

ABSTRACT:
In order to realize a power supply device for a sensor which can be used for a long time without any wire linking an outside power source and a movable door so as to supply an electric power, an outside power source contact on a transom and a battery contact on a door are connected when the door is in its closed or open position, induced current is generated from a primary circuit on the transom to a secondary circuit on the door by electro-magnetic induction when the door is in its closed or open position, or electric current is generated by a generator mounted to the door by utilizing the closing and opening movements of the door.

REFERENCES:
patent: 4698876 (1987-10-01), Karita
patent: 4983963 (1991-01-01), Hodgetts et al.
patent: 5157319 (1992-10-01), Klontz
patent: 5239779 (1993-08-01), DeLand et al.

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