US3753568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record playback apparatus
Assignee: Mattel Inc
•
Filing: 1969-05-05
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Granted: 1973-08-21
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Expires: 1989-05-05
Abstract
Abstract A record player with an endless record tape or band carrying several parallel sound tracks and a slot therein at the end of the tracks, including a mechanism operated by the slot for stopping the record player and rotating a cam to randomly select the groove in which the stylus will enter when the record player is restarted. The mechanism includes a shaft pivotally mounted on the record player housing, with an arm thereon which lies against the tape to move through the slot and thereby pivot the shaft. The shaft also carries a pawl that ''''flicks'''' the cam and a lug that separates switch contacts to de-energize the record player motor, when the shaft rotates as the arm moves through the record slot.
Inventors
- 👤 G Buck
- 👤 J Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:32
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
193 words
A phonograph comprising: a housing; a record having a surface provided with a sound recording thereon; pick-up means for playing said recording; motor means on said housing for moving said record past said pick-up means; an arm pivotally mounted in said housing about an axis that is adjacent and parallel to said surface and perpendicular to the direction of record movement, said arm extending generally radially of said axis and having a movable end extending in the direction of record movement; means biasing said arm to engage said movable end with said surface; an opening in said surface into which said movable end may move, at a predetermined position of movement of said record; means responsive to the angular position of said arm, about said axis, for controlling the operation of said motor means; said arm being fixed to a shaft that is pivotally mounted on said housing and defining said axis; said record having a plurality of substantially parallel tracks; and including a rotatably mounted cam for selectively engaging said pick-up means with one of said track; and pawl means mounted on said shaft to rotate said cam when said shaft pivots.
Claim 2
Dependent Claim
193 words
A phonograph comprising: a housing; a record having a surface provided with a sound recording thereon; pick-up means for playing said recording; motor means on said housing for moving said record past said pick-up means; an arm pivotally mounted in said housing about an axis that is adjacent and parallel to said surface and perpendicular to the direction of record movement, said arm extending generally radially of said axis and having a movable end extending in the direction of record movement; means biasing said arm to engage said movable end with said surface; an opening in said surface into which said movable end may move, at a predetermined position of movement of said record; means responsive to the angular position of said arm, about said axis, for controlling the operation of said motor means; said arm being fixed to a shaft that is pivotally mounted on said housing and defining said axis; said record having a plurality of substantially parallel tracks; and including a rotatably mounted cam for selectively engaging said pick-up means with one of said track; and pawl means mounted on said shaft to rotate said cam when said shaft pivots.
Claim 3
Dependent Claim
58 words
The phonograph described in claim 1 wherein said cam comprises a freely rotatably mounted cam wheel for positioning said pick-up means at one of said tracks selected in accordance with the rotational position of said cam wheel; and said pawl mounted on said shaft for rotation with it, to flick said cam wheel to a new rotational position.
References Cited (Backward Citations)
US3482842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |