Title: Entertainment and public address system with replay of entertainment program after a public address interruption

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Claims: What is claimed is:

1. An entertainment and public address system comprising:

an amplifier;

at least one speaker connected to an output of said amplifier;

first and second sources of audio input signals, said first source including a recorder having a reversible drive adapted to be connected to a source of operating potential;

switching means having first and second positions for alternately coupling said first and second audio input sources, respectively, to said amplifier; and

rewind means connected to said switch means and said recorder for rewinding said recorder a preselected amount in response to actuation of said switching means to said second position, said rewind means including:

interrupt means connected to said drive for selectively interrupting the supply of operating potential to said drive; and

a time delay network connected to said interrupt means and said drive for reversing said drive in response to actuation of said switching means to said second position and for actuating said interrupt means a preselected time after actuation of said switching means to said second position whereby said recorder is rewound by said preselected amount whenever said second audio input source is connected to said amplifier.

2. The system as recited in claim 1 wherein said reversible drive includes a direct current motor coupled with a polarity reversing switch network.

3. The system as recited in claim 1 wherein said second source of audio signals comprises a microphone.

4. The system as recited in claim 1 wherein said switching means comprises a double-pole, double-throw relay.

Other info:

Inventors: Parke, Harry G. (Brooklyn, NY, US)

Application Number: 644442
Filing Date: 1975-12-29
Publication_date: 1977-07-12
Assignee: Marine Electric Corporation (Brooklyn, NY)
Primary Class(es): 369/1 360/12, 381/82, 381/86
Other Classes:
US Patent Ref:

2495749	Jan, 1950	Mayle	179/1.
3632893	Jan, 1972	Bolick	179/100.
3795769	Mar, 1974	Nowka	179/1.

Other Refs:
Primary Examiner: Cardillo, Jr., Raymond F.
Assistant Examiner:
Attorney: Imirie, Smiley & Linn