Browse Prior Art Database

Pneumatic Camera Scanner

IP.com Disclosure Number: IPCOM000088811D
Original Publication Date: 1977-Aug-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Helms, RR: AUTHOR [+2]

Abstract

A pneumatically driven scanner for a closed circuit television camera can be operated in hazardous atmospheres where an electrically driven scanner would have to be specially designed and sealed. '

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Pneumatic Camera Scanner

A pneumatically driven scanner for a closed circuit television camera can be operated in hazardous atmospheres where an electrically driven scanner would have to be specially designed and sealed. '

A camera (Fig. 1) is fastened to a mounting plate and is adjusted to a desired tilt angle. A bolted connection maintains the tilt angle and secures the mounting plate to the output shaft of a gearbox. The camera is scanned by driving the input of the gearbox with a reversible rotary air motor.

Two cams, mounted on the output shaft, determine the scan limits by operation pilot valves. The left pilot valve causes a directional control valve (switch) to port air into the motor via path A (Fig. 2), driving the motor in one direction until the cam for the right pilot valve actuates the right pilot valve. This switches the directional control valve, porting air into the motor via path B, reversing the air motor and the scan direction. An exhaust flow rate valve adjusts motor speed.

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