Camera system having a camera body with a power supply and an ac

Details Camera system having a camera body with a power supply and an ac Camera system having a camera body with a power supply and an ac

1995-06-30

1997-09-02

Gray, David M.

Photography

With power supply detail

Power distribution management

396532, G03B 726

Patent

active

056642458

ABSTRACT:
A camera system having a camera body which is attachable to an accessory, such that the camera body includes a detection unit to detect that the accessory is in the process of being installed on the camera body, the detection unit having a detachment pin which sets a detachment switch ON or OFF. When the detection units detects that the accessory is in the course of installation, a semiconductor switching element (a MOSFET) is set OFF, and the provision of a power supply from a battery to a contact point of a electrical contact point unit of the camera body is stopped. As a result, the power supply is not provided to the accessory and various disadvantages are avoided when the accessory is in the course of installation. In addition, the power supply can be safely provided to the accessory regardless of any communication.

REFERENCES:
patent: 4922283 (1990-05-01), Fukui
patent: 4924249 (1990-05-01), Aihara et al.
patent: 5043754 (1991-08-01), Aihara et al.

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