US3789970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Striking device for a typewriter
Assignee: Individual
•
Filing: 1971-12-01
•
Granted: 1974-02-05
•
Expires: 1991-12-01
Abstract
Abstract The typewriter has type bars with key levers and guide and return means for the key levers. The guide and return means are constituted by flexible guide parts arranged in two substantially parallel rows and extending over the whole width of the machine keyboard. The guide parts are fixed by one of their ends on a support rigidly fixed to the frame of the machine, whilst their free outer ends cooperate with the said type levers.
Inventors
- 👤 G Costa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
B; B41; B41J; B41J23/00; B41J23/02; B41J23/04; B41J23/06; B41J5/00; B41J5/08; B41J5/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A striking device for a typewriter provided with a plurality of typebars, a keyboard including a plurality of key levers attached to flexible means for the guiding and recall of each said key lever, a rigid U-shaped support fixed relative to the frame of the typewriter and provided with a front arm and a rear arm, said flexible means comprising at least two rows of substantially parallel resilient strips, said strips each having one end fixedly attached to said support adjacent said front support arm, said strips each having an opposite free end attached to each said key lever adjacent said rear support arm, said rear support arm including guide slots engageable by each said key lever adjacent the point of attachment between said strip free ends and said key levers, and said strips forming each said row are cut from a single piece of resilient material.
Claim 2
Dependent Claim
147 words
A striking device for a typewriter provided with a plurality of typebars, a keyboard including a plurality of key levers attached to flexible means for the guiding and recall of each said key lever, a rigid U-shaped support fixed relative to the frame of the typewriter and provided with a front arm and a rear arm, said flexible means comprising at least two rows of substantially parallel resilient strips, said strips each having one end fixedly attached to said support adjacent said front support arm, said strips each having an opposite free end attached to each said key lever adjacent said rear support arm, said rear support arm including guide slots engageable by each said key lever adjacent the point of attachment between said strip free ends and said key levers, and said strips forming each said row are cut from a single piece of resilient material.
Claim 3
Dependent Claim
68 words
A device according to claim 1, wherein, each set key lever includes fingers disposed within said guide slots, said strip free ends each provided with an aperture, and the end portion of each said finger is disposed within one said strip aperture to provide said point of attachment between said strips and key levers, whereby said strips maintain the positioning of said key levers within said guide slots.
Claim 4
Dependent Claim
178 words
A striking device for a typewriter with a plurality of type bars, a keyboard including a plurality of adjacent key levers attached to flexible means for the guiding and recall of each said key lever, a rigid rear comb support member affixed to the frame of the typewriter and provided with guide slots engageable by each said key lever adjacent the point of attachment between said flexible means and said key levers, said flexible means comprising for each said key lever a U-shaped resilient member including a pair of parallel arms each having a free end attached to each said key lever adjacent each said guide slot, each said pair of parallel arms connEcted by a web portion fixed relative to the frame of the typewriter, a pair of lugs on each said key lever pivotably connected to a respective pair of said parallel arm free ends, and said lugs are each disposed in one said slot of said rear comb support member, whereby, said parallel arms maintain the positioning of said key levers within said guide slots.
Claim 5
Dependent Claim
178 words
A striking device for a typewriter with a plurality of type bars, a keyboard including a plurality of adjacent key levers attached to flexible means for the guiding and recall of each said key lever, a rigid rear comb support member affixed to the frame of the typewriter and provided with guide slots engageable by each said key lever adjacent the point of attachment between said flexible means and said key levers, said flexible means comprising for each said key lever a U-shaped resilient member including a pair of parallel arms each having a free end attached to each said key lever adjacent each said guide slot, each said pair of parallel arms connEcted by a web portion fixed relative to the frame of the typewriter, a pair of lugs on each said key lever pivotably connected to a respective pair of said parallel arm free ends, and said lugs are each disposed in one said slot of said rear comb support member, whereby, said parallel arms maintain the positioning of said key levers within said guide slots.
Claim 6
Dependent Claim
54 words
A device according to claim 3 including, a pair of parallel pins affixed to the frame of the typewriter and extending the entire lateral extent of the plurality of key levers, and the ends of each of said web portions connecting said pairs of parallel arms are mounted on said pair of parallel pins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |