Title: Power supply for an audio-video recording system

Abstract: The disclosure relates to a selectively operable power supply for a recording system of the type which includes tuning and intermediate frequency sections for receiving and converting transmitted television signals into composite video and audio signals and a recorder for recording the composite video and audio television signals onto a recording medium. The power supply comprises a timer including a switch which is selectively operable for providing an A.C. line voltage when its contacts are closed at preselected times and a receptacle coupled to the switch and adapted to receive the power input of the recorder for powering the recorder at the preselected times and a rectifier and filter coupled to the switch for powering the tuning and intermediate frequency sections with filtered DC voltage at the preselected times.

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Inventors: Aubert, Richard C. (Chicago, IL, US)
Dean, George R. (Chicago, IL, US)
Ricks, James B. (Evanston, IL, US)
Wade, John W. (Mount Prospect, IL, US)

Application Number: 569346
Filing Date: 1975-04-18
Publication_date: 1976-06-08
Assignee: Bell & Howell Company (Chicago, IL)
Primary Class(es): 348/730 360/69, 369/7, 386/96, 455/343.4
Other Classes:
US Patent Ref:

3611151	Oct, 1971	Fernandez	325/396.
3818352	Jun, 1974	Moran	325/396.
3873921	Mar, 1975	Petrinec	325/396.

Other Refs:
Primary Examiner: Griffin, Robert L.
Assistant Examiner: Psitos, Aristotelis M.
Attorney: Gray; Richard, Fitz-Gerald; Roger M.