US3608909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record-flattening turntable
Assignee: Individual
•
Filing: 1969-11-03
•
Granted: 1971-09-28
•
Expires: 1989-11-03
Abstract
Abstract A phonograph record turntable is provided with means for flattening disc records placed thereon. Examples are shown for accomplishing this by means of vacuum or mechanical holddown devices.
Inventors
- 👤 Jacob Rabinow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:54
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/0282; G11B17/32; G11B19/00; G11B19/20; G11B23/00; G11B23/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A. A turntable for phonograph disc records having means to flatten a record on said turntable during the playing cycle, b. said flattening means comprising a number of peripherally spaced mechanical finger means pivotally attached to the underside of the turntable and arranged to hook over the outer edge of a disc record, and to pull the rim of the record down against the turntable during playing of the record.
Claim 2
Dependent Claim
70 words
A. A turntable for phonograph disc records having means to flatten a record on said turntable during the playing cycle, b. said flattening means comprising a number of peripherally spaced mechanical finger means pivotally attached to the underside of the turntable and arranged to hook over the outer edge of a disc record, and to pull the rim of the record down against the turntable during playing of the record.
Claim 3
Dependent Claim
45 words
The invention according to claim 1, c. means to actuate said fingers so as to move them up from the disc and out from the edge of the disc when releasing the record, and in toward the disc and down onto the disc when playing.
Claim 4
Dependent Claim
263 words
The invention according to claim 1, c. and additional vacuum means to reduce the pressure under a record on said turntable. 4. a. A turntable for phonograph disc records having means to flatten a record on said turntable during the playing cycle, b. said flattening means comprising a number of peripherally spaced mechanical finger means attached to the turntable to pull the rim of the record down against the turntable during playing of the record, c. means to actuate said fingers so as to move them up from the disc and out from the edge of the disc when releasing the record, and in toward the disc and down onto the disc when playing, d. said actuating means comprising a vertically slidable flanged collar coaxial with and mounted below said turntable, e. a centrally pivoted, radially oriented lever for each of said fingers mounted on the underside of the turntable, the inner end of each said lever engaging said collar for movement therewith, f. each of said fingers being pivotally mounted on the outer end of one of said levers and being spring-biased to engage a portion of the turntable so that as the outer end of the lever moves in one direction, the finger is disengaged from the record and as the outer end moves in the other direction, the finger is engaged with the record, g. yoke means engageable with a flange on said collar to control vertical movement of the collar and through it of said levers, f. stationary mounted mechanical linkage means controlling the movement of said yoke means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |