Replay and protective disc for phonograph record changers

Details Replay and protective disc for phonograph record changers Replay and protective disc for phonograph record changers

1977-01-05

1978-10-31

Aegerter, Richard C.

Undertaking

274 42R, G11B 362

Patent

active

041230639

ABSTRACT:
A disc used for the replay and protection of phonograph records on an automatic changer is disclosed which disc has a center hole and a keyway extending therefrom allowing the disc to slide down the changer spindle when the keyway is aligned with the spindle record release lever or to remain atop the spindle when the keyway is misaligned with the release lever.

REFERENCES:
patent: 832403 (1906-10-01), Milans
patent: 870961 (1907-11-01), Hoffman
patent: 1930502 (1933-10-01), Barton
patent: 2906536 (1959-09-01), Mauerhoff
patent: 3401943 (1968-09-01), O'Brien

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