The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1980
Filed:
Jan. 08, 1979
Robert R Parker, Wheeling, IL (US);
Bell & Howell Company, Chicago, IL (US);
Abstract
One or more remote control arrangements are provided for interconnection to projector apparatus including local controls. Each of the remote control arrangements includes momentary actuated push-button controls for independently controlling the forward, reverse and stop drive modes and the on and off lamp status of the projection apparatus. Each of the remote control arrangements and the local control arrangement generate or synthesize a predetermined control signal corresponding to each of the drive modes and lamp status conditions from a signal waveform inputted to the remote control arrangements from the projection apparatus over one conductor of the interconnection cable between the projection apparatus and each of the remote control arrangements. The interconnection cable includes three conductors; a first conductor carrying the input signal waveform from a signal generator stage of the projection apparatus, a second conductor controlling the forward, reverse and stop status of the projection apparatus, and a third conductor controlling the operational status of the projection lamp and further controlling a lamp status indicator on the remote control arrangement. The projection apparatus includes arrangements for detecting the various drive mode and lamp status control signals received from the remote control arrangements and for controlling the drive control circuitry, audio circuitry, and fire shutter mechanism in accordance with the control signals inputted from the remote control arrangements.