Patent US3800933A successfully refreshed from Google Patents.
US3800933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed and carriage control therefor
Assignee: International Standard Electric Corp
•
Filing: 1972-10-05
•
Granted: 1974-04-02
•
Expires: 1992-10-05
Abstract
Abstract A teleprinter or the like wherein a typewheel is rotated around a helically grooved rod. The typewheel has an internal projection to ride in the groove. The rod is rotated at different speeds for carriage advance, stop and return. The typewheel is rotated continuously.
Inventors
- 👤 T Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:16
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/68; B41J19/70; B41J1/00; B41J1/22; B41J1/32; B41J1/34; B41J19/20; Y; Y10; Y10S; Y10S400/00; Y10S400/901; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18072
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
238 words
A printing mechanism comprising: a frame; a rod rotatably mounted on said frame parallel to a printing line, said rod having a cylindrical outer surface with a helical groove therein; a typewheel rotatable on said rod, said typewheel having a projection extending into said groove; first means mounted on said frame to cooperate with means mounted on said typewheel to rotate said typewheel in a predetermined direction continously at a constant speed relative to said frame; second means mounted on said frame, said second means being selectively operable to rotate said rod in said predetermined direction at an angular velocity greater than that of said typewheel; third means mounted on said frame, said third means being selectively operable to rotate said rod in said predetermined direction at an angular velocity equal to that of said typewheel whereby, when said third means is operable, no movement of the typewheel along the rod occurs while when the second means is operable the typewheel feeds to a new position; fourth means mounted on said frame, said fourth means being selectively operable to brake said rod thereby causing said typewheel to be fed to the beginning of a new print line by said first means, said typewheel having type fonts mounted thereon therearound; and fifth means mounted on said frame, said fifth means being selectively operable to cause any one of said type fonts to make an impression on a recording medium.
Claim 2
Dependent Claim
238 words
A printing mechanism comprising: a frame; a rod rotatably mounted on said frame parallel to a printing line, said rod having a cylindrical outer surface with a helical groove therein; a typewheel rotatable on said rod, said typewheel having a projection extending into said groove; first means mounted on said frame to cooperate with means mounted on said typewheel to rotate said typewheel in a predetermined direction continously at a constant speed relative to said frame; second means mounted on said frame, said second means being selectively operable to rotate said rod in said predetermined direction at an angular velocity greater than that of said typewheel; third means mounted on said frame, said third means being selectively operable to rotate said rod in said predetermined direction at an angular velocity equal to that of said typewheel whereby, when said third means is operable, no movement of the typewheel along the rod occurs while when the second means is operable the typewheel feeds to a new position; fourth means mounted on said frame, said fourth means being selectively operable to brake said rod thereby causing said typewheel to be fed to the beginning of a new print line by said first means, said typewheel having type fonts mounted thereon therearound; and fifth means mounted on said frame, said fifth means being selectively operable to cause any one of said type fonts to make an impression on a recording medium.
Claim 3
Dependent Claim
113 words
The invention as defined in claim 1, wherein said first means includes a first pinion fixed to said typewheel, said rod and said first pinion having the same rotational axis, a carriage slidable over said rod in a fixed angular position therearound relative to said frame, said typewheel being rotatable relative to said carriage but always movable therewith in the direction of said axis, a second pinion rotatably mounted on said carriage in mesh with said first pinion, a third pinion rotatably mounted on said frame in mesh with said second pinion, said first and second pinions having thicknesses at least an order of magnitude less than the thickness of said third pinion.
References Cited (Backward Citations)
US2774816A
Cited
US3630335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |