Patent US3552285A successfully refreshed from Google Patents.
US3552285A
Expired / Lapsed
US
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Turret font photocomposing machine
Assignee: Fairchild Semiconductor Corp
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Filing: 1968-06-18
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Granted: 1971-01-05
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Expires: 1988-06-18
Abstract
Abstract A photocomposing apparatus employing a variable-magnification lens system for projecting characters from a character font onto a record film at a variety of effective point-sizes, and in which positive and readily settable detent elements are provided to position the lens elements at the various precise positions required for the desired range of point sizes, by simple manual operations carried out in a few seconds for each such change. This is a division of Serial No. 519,906, filed Jan. 11, 1966 and allowed Mar. 18, 1968, now Pat. No. 3,434,402.
Inventors
- 👤 John M Mccall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
B; B41; B41B; B41B27/00; B41B21/00; B41B21/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
In a photocomposing machine of the kind including a variable magnification optical system for imaging character representations on a photographic medium, said optical system comprising a pair of axially-adjustable lens elements forming a variable magnification system, the improvement which comprises precisely adjustable position-detenting means for said lens elements, said position-detenting means comprising a threaded guide positioned parallel to the common axis of said lens elements, V-grooved positioning detents on said threaded guide, individual clamping nuts threaded on said rod to secure each of said detents in a precisely adjusted position thereon, a positioning element on each of said lens elements for selective engagement with a respective one of said detents, and means for releasably urging each of said positioning elements into engagement with one of said detents.
Claim 2
Dependent Claim
127 words
In a photocomposing machine of the kind including a variable magnification optical system for imaging character representations on a photographic medium, said optical system comprising a pair of axially-adjustable lens elements forming a variable magnification system, the improvement which comprises precisely adjustable position-detenting means for said lens elements, said position-detenting means comprising a threaded guide positioned parallel to the common axis of said lens elements, V-grooved positioning detents on said threaded guide, individual clamping nuts threaded on said rod to secure each of said detents in a precisely adjusted position thereon, a positioning element on each of said lens elements for selective engagement with a respective one of said detents, and means for releasably urging each of said positioning elements into engagement with one of said detents.
Claim 3
Dependent Claim
27 words
In a photocomposing machine as described in claim 1, means for selectively locking each of said positioning elements in engagement with a selected one of said detents.
References Cited (Backward Citations)
US1755105A
Cited
US2923212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |