Dynamic information storage or retrieval – Sound reproduction for toy or novelty device – With beginning or end of cycle stylus return
Patent
1986-02-26
1987-09-15
Stephan, Steven L.
Dynamic information storage or retrieval
Sound reproduction for toy or novelty device
With beginning or end of cycle stylus return
369 63, 369 65, G11B 1706
Patent
active
046944460
ABSTRACT:
A simplified sound reproducing device for randomly selecting recordings to be reproduced, having a free gear formed with one or more intermittent tooth portions with tooth crest in the direction of rotation longer than that of other normal teeth. The gear system which includes this intermittent tooth portion is constructed such that this portion can contact any one gear tooth among other normal teeth of the mating gear in the gear system including the free gear and a center gear disposed at the center of the record disc. When the swing arm approaches the end point of sound reproduction at the urging of pickup, the free gear can engage the center gear. A cam member is interposed between the record disc and sound transmitting member. The cam member has two cam pieces axially stacked one on another such that the total length of the cam member can be lengthened when the two pieces are twisted. One upper piece 7 is capable of engagement with the free gear. When the free gear abuts the crest of tooth of a gear tooth in the mating gear of the gear system in the device and stops rotation against the driving force imparted by the center gear upper cam piece also stops resulting in elongation of the cam member. Because the location of the intermittent tooth portion is unpredictable with regard to the phase of rotation of the record disc the timing for initiating twisting action in the cam member which releases the stylus force is also made random.
REFERENCES:
patent: 4055351 (1977-10-01), Hughes
patent: 4150832 (1979-04-01), Watanabe
patent: 4347595 (1982-08-01), Ngai
patent: 4486871 (1984-12-01), Koike
Ozen Corporation
Stephan Steven L.
LandOfFree
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