US3799313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable sprocket assembly
Assignee: AT&T Teletype Corp
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Filing: 1972-04-13
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Granted: 1974-03-26
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Expires: 1992-04-13
Abstract
Abstract A sprocket assembly for a teletypewriter, or other device wherein perforated webs are to be advanced, includes a horizontally stationary, rotatable platen or roller which mounts a plurality of sprocket pins thereon for drivingly engaging marginal apertures in a web. The platen has a plurality of axially extending, equiangularly spaced grooves formed in the outer surface thereof. The sprocket pins are mounted for sliding movement within the grooves and thereby are adaptable for engaging webs of various widths. A keeper ring, which may be formed integrally with the sprocket pins, or as a separate element, aligns the sprocket pins for engagement with the web apertures and can be selectively positioned along the platen to accommodate webs of various widths. A mechanism is provided for releasably locking the sprocket assembly in the desired preset position along the platen.
Inventors
- 👤 B Shevick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:19
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/26; B41J11/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
331 words
In a printer, a sprocket feed assembly for moving a web having marginal apertures formed therein into position for receiving print information, which comprises: a rotatable cylindrical platen having a plurality of equiangularly spaced grooves of dovetail cross-sectional configuration formed in the periphery thereof and extending along the length thereof; an elongated shaft mounted on the printer with the axis of said shaft parallel to the axis of said platen; a plurality of carriers having a body portion with a boss and a sprocket pin extending upwardly from opposite ends thereof and having a foot extending downwardly from each end thereof to slidably retain one of the pLurality of carriers in each dovetail groove so that the boss and the sprocket pin extend in radially outward direction from the platen; a plate having apertures formed at opposite ends thereof through which plate apertures said shaft and said platen extend to slidably mount said plate and to prevent the rotation of said plate, said plate having a channel formed about the inner circumference of the plate aperture through which the platen extends to engage the boss extending from the body portion of each carrier thereby aligning the plurality of carriers so that, upon rotation of the platen, the sprocket pins engage the apertures in the web to move the web into position for receiving print information, the inner circumference of the plate aperture through which the platen extends being such that engagement of the channel with the boss on the body portion of each carrier distorts the body portion in a radially inward direction thereby frictionally engaging the feet on the body portion of each carrier with the platen; and a gate mounted on the end of said plate adjacent said platen for pivotal movement toward said platen and having a concave inner surface so that, upon said gate being pivoted toward said platen to a position proximate to said platen, said gate holds the web against the periphery of said platen.
Claim 2
Dependent Claim
331 words
In a printer, a sprocket feed assembly for moving a web having marginal apertures formed therein into position for receiving print information, which comprises: a rotatable cylindrical platen having a plurality of equiangularly spaced grooves of dovetail cross-sectional configuration formed in the periphery thereof and extending along the length thereof; an elongated shaft mounted on the printer with the axis of said shaft parallel to the axis of said platen; a plurality of carriers having a body portion with a boss and a sprocket pin extending upwardly from opposite ends thereof and having a foot extending downwardly from each end thereof to slidably retain one of the pLurality of carriers in each dovetail groove so that the boss and the sprocket pin extend in radially outward direction from the platen; a plate having apertures formed at opposite ends thereof through which plate apertures said shaft and said platen extend to slidably mount said plate and to prevent the rotation of said plate, said plate having a channel formed about the inner circumference of the plate aperture through which the platen extends to engage the boss extending from the body portion of each carrier thereby aligning the plurality of carriers so that, upon rotation of the platen, the sprocket pins engage the apertures in the web to move the web into position for receiving print information, the inner circumference of the plate aperture through which the platen extends being such that engagement of the channel with the boss on the body portion of each carrier distorts the body portion in a radially inward direction thereby frictionally engaging the feet on the body portion of each carrier with the platen; and a gate mounted on the end of said plate adjacent said platen for pivotal movement toward said platen and having a concave inner surface so that, upon said gate being pivoted toward said platen to a position proximate to said platen, said gate holds the web against the periphery of said platen.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |