Patent US4118128A successfully refreshed from Google Patents.
US4118128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical typewriter
Assignee: Individual
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Filing: 1975-09-08
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Granted: 1978-10-03
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Expires: 1995-09-08
Abstract
Abstract A typewriter for writing with a light beam on a photo-sensitive paper includes a translatable typewriter carriage having a sight carried fixedly to a frame of the typewriter defining a region on which an indicia is being written. A light source is carried on a servo-driven trolley along an arcuate track having a center of curvature at the sight portion. A perforate letter template is located along a coaxial arc between the track and the carriage. In response to the depression of a key on a keyboard, for selecting a letter to be typed, the trolley is positioned along the track so that the light therefrom passes through a selected indicia on the template and then to the sight defined region of the paper.
Inventors
- 👤 Louis Van Den Essen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/465; B41J2/4655
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A writing machine comprising a translatable paper carriage for holding a light sensitive paper; a fixedly positioned sight alongside said carriage for defining a portion of said paper to be written on; an elongated track directed along a first arc swung about said sight; an elongated template lying along a second arc located between said sight and said track, said second arc also being swung about said sight; said template having a plurality of perforate indicia thereon; said indicia being spaced apart along the length of said template; a directional light source mounted for movement along said track; said light source being aimed toward said sight for directing light through a selected one of said indicia and onto said paper; there being a correspondence between the selected indicia and the position of said light source along said track; a keyboard for selecting which of said indicia is to be written on said paper; and motor means responsive to said keyboard for positioning said light source along said track.
Claim 2
Dependent Claim
168 words
A writing machine comprising a translatable paper carriage for holding a light sensitive paper; a fixedly positioned sight alongside said carriage for defining a portion of said paper to be written on; an elongated track directed along a first arc swung about said sight; an elongated template lying along a second arc located between said sight and said track, said second arc also being swung about said sight; said template having a plurality of perforate indicia thereon; said indicia being spaced apart along the length of said template; a directional light source mounted for movement along said track; said light source being aimed toward said sight for directing light through a selected one of said indicia and onto said paper; there being a correspondence between the selected indicia and the position of said light source along said track; a keyboard for selecting which of said indicia is to be written on said paper; and motor means responsive to said keyboard for positioning said light source along said track.
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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) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |