US3759362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transporting a type support carriage in typewriters or similar office machines
Assignee: Olympia Werke AG
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Filing: 1972-02-02
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Granted: 1973-09-18
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Expires: 1992-02-02
Abstract
Abstract A device for transporting a type support carriage in typewriters or similar office machines including a stepping mechanism which advances the support carriage in steps in the typing direction. The stepping mechanism includes a first toothed rail mounted on the machine frame and displaceable relative thereto. A second toothed rail is provided which is also fastened to the machine frame along with a third toothed rail which is fastened to the support carriage. A sprocket wheel assembly is also provided with the first toothed rail engageable through the sprocket assembly with the third toothed rail in a path translating manner while the sprocket assembly is in engagement with the second toothed rail.
Inventors
- 👤 P Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:53
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J19/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
In a device for transporting a type support carriage in typewriters or similar office machines in which the type support carriage is advanced in steps in the typing direction by a step advancing mechanism fastened to the machine frame, the improvement comprising: a first toothed rail formed as part of said step advancing mechanism and mounted on the machine frame for displacement relative thereto; a second toothed rail fastened to said machine frame; a third toothed rail fastened to the type support carriage; and a sprocket wheel means freely rotatably secured to said first toothed rail for displacement therewith as a unit, said sprocket wheel means meshing with the teeth of said second and third toothed rails.
Claim 2
Dependent Claim
117 words
In a device for transporting a type support carriage in typewriters or similar office machines in which the type support carriage is advanced in steps in the typing direction by a step advancing mechanism fastened to the machine frame, the improvement comprising: a first toothed rail formed as part of said step advancing mechanism and mounted on the machine frame for displacement relative thereto; a second toothed rail fastened to said machine frame; a third toothed rail fastened to the type support carriage; and a sprocket wheel means freely rotatably secured to said first toothed rail for displacement therewith as a unit, said sprocket wheel means meshing with the teeth of said second and third toothed rails.
Claim 3
Dependent Claim
49 words
A device as defined in claim 1, further comprising a guide member mounted on the machine frame coextensive with said first toothed rail, means defining a groove in said guide member and a bolt provided on said first toothed rail, said bolt being in continuous engagement with said groove.
Claim 4
Dependent Claim
70 words
A device as defined in claim 1, further comprising a spring motor formed by the sprocket wheel means, the first toothed rail, and a torsion spring, and wherein the sprocket wheel means includes a bearing seat upon which the torsion spring is disposed with the free ends of said spring engaging in bores provided in a sprocket wheel of the sprocket wheel means and in the first toothed rail, respectively.
Claim 5
Dependent Claim
46 words
A device as defined in claim 1, wherein the step advancing mechanism includes a toothed stepping rail which supports the sprocket wheel means and a stepping latch which directly engages the teeth of said toothed stepping rail, said toothed stepping rail constituting said first toothed rail.
Claim 6
Dependent Claim
44 words
A device as defined in claim 1, wherein said third toothed rail is displaceable relative to said first toothed rail by said sprocket wheel means, and wherein the displacement of said third toothed rail is greater than the displacement of said first toothed rail.
Claim 7
Dependent Claim
27 words
A device as defined in claim 1, wherein said third toothed rail is substantially shorter than the length of the travelling path of said type support carriage.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |