US3616888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Typewriting mechanism having plural type wheel type head
Assignee: Kurosawa Tele Communications Ltd
•
Filing: 1968-09-03
•
Granted: 1971-11-02
•
Expires: 1988-09-03
Abstract
Abstract A typewriter mechanism which uses a plurality of type wheels with the characters thereon. The type wheels are positioned in a type wheel head which is actuated by an axial selector means and a rotation selector means. The selector means and the type wheel head are mounted on a movable carriage frame such that the type wheel heads and the selector means are positioned with respect to the typewriter platen. Each selector is operated by a separate lever mechanism which is in turn operated by electromagnet means through a connecting means. The electromagnet means are operated in accordance with a binary coded input signal.
Inventors
- 👤 Reijiro Kawano
- 👤 Masatsugu Arakawa
- 👤 Yoshinari Fujishima
- 👤 Yoshio Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:33
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
electromagnetic means, p. electronic circuit means electrically connected to said electromagnetic means for supplying a binary coded signal to said electromagnetic means, q. second connecting means for connecting said electromagnetic means to each of said clutch keys, whereby when said electromagnetic means are activated, one of said clutch keys brings one of said cam assemblies into an operative relation with said cam shaft thereby operating one of said first connecting means whereby a related push-pull bar is operated.
Claim 2
Dependent Claim
309 words
A typewriter mechanism comprising: a. a rotatable platen, b. a carriage frame, c. a first shaft, said carriage frame slidably mounted thereon, d. a typewheel head comprising a plurality of typewheels arranged in series at regular intervals, e. a second shaft rotatably mounted in said carriage frame, said typewheel head slidably mounted on said second shaft, f. first and second lever mechanisms, each comprising a plurality of parallel push-pull bars, each push-pull bar having two stable positions, g. first and second link mechanisms connecting in a linked relation said push-pull bars of said first and second lever mechanisms, h. an endless toothed belt mechanically connected to said second shaft for rotating said shaft, thereby rotatably positioning all of said typewheels, i. a first output bar linked at one end to said typewheel head at the other end to said first link mechanism, j. a second output bar linked at one end to said endless toothed belt and at the other end to said second link mechanism, k. a cam shaft rotatably mounted in said carriage frame, l. a plurality of cam assemblies capable of being operatively positioned with respect to said cam shaft, m. a plurality of first connecting means for operatively connecting each of said cam assemblies to one of said push-pull bars, n. a plurality of clutch keys slidably mounted in the radial direCtion in said cam shaft, 0. electromagnetic means, p. electronic circuit means electrically connected to said electromagnetic means for supplying a binary coded signal to said electromagnetic means, q. second connecting means for connecting said electromagnetic means to each of said clutch keys, whereby when said electromagnetic means are activated, one of said clutch keys brings one of said cam assemblies into an operative relation with said cam shaft thereby operating one of said first connecting means whereby a related push-pull bar is operated.
Claim 3
Dependent Claim
25 words
Typewriter mechanism of claim 1, wherein said electromagnetic means comprises a plurality of electromagnets, each of said electromagnets associated with one of said cam assemblies.
References Cited (Backward Citations)
US2919002A
Cited
US3302765A
Cited
US3233715A
Cited
US3453379A
Cited
US3353648A
Cited
US3414103A
Cited
US3404765A
Cited
US3391774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |