US4093056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single revolution mechanism
Assignee: International Business Machines Corp
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Filing: 1976-12-10
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Granted: 1978-06-06
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Expires: 1996-12-10
Abstract
Abstract A single revolution mechanism is disclosed in which a feed roll is mounted on a print lever which is attached rotatably to a pivot. By rotating the lever, the feed roll can be brought into contact with an external driving shaft. The feed roll is coupled to a ratchet mechanism comprising a pawl and ratchet. The pawl is engaged with a spring urged pressure lever so that when the feed roll is driven, the ratchet pushes itself away from the second lever to latch the print lever and roll in the operative position during a full revolution. After performing the revolution, the print lever reengages the ratchet to unlatch the device from the driving roll in preparation for another actuation.
Inventors
- 👤 Gerrit Burgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:31
CPC Classifications
B; B41; B41K; B41K3/00; B41K3/62; B41K3/02; B41K3/12; F; F16; F16H; F16H27/00; F16H27/04; F16H27/10; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A single revolution mechanism, wherein a coupling between a shaft to be driven and a continuously rotating shaft is effected and latched, and after performing a predetermined rotation of the shaft to be driven, the latching and the coupling with said continuously rotating shaft are automatically interrupted, comprising: a feed roll (6) rotatably mounted at one end of a first lever (3); means (4) for bringing said first lever from the rest position to an operative position in which operative position said feed roll is in a proper position to be driven by frictional contact with a continuously rotating shaft (11); and, further means for mechanically latching said lever and feed roll in the operative position independently of said means (4) and means for eliminating this mechanical latching after a predetermined rotation of said feed roll.
Claim 2
Dependent Claim
136 words
A single revolution mechanism, wherein a coupling between a shaft to be driven and a continuously rotating shaft is effected and latched, and after performing a predetermined rotation of the shaft to be driven, the latching and the coupling with said continuously rotating shaft are automatically interrupted, comprising: a feed roll (6) rotatably mounted at one end of a first lever (3); means (4) for bringing said first lever from the rest position to an operative position in which operative position said feed roll is in a proper position to be driven by frictional contact with a continuously rotating shaft (11); and, further means for mechanically latching said lever and feed roll in the operative position independently of said means (4) and means for eliminating this mechanical latching after a predetermined rotation of said feed roll.
Claim 3
Dependent Claim
90 words
Single revolution mechanism as described in claim 1 wherein: said first lever is pivotably fitted on a shaft (12) and is held in the rest state by spring force (13), said means (4) being electromagnetic means, cooperating with the other end of said lever (3) and causing, in response to an electrical signal, an angular rotation of said lever, as a result whereof said lever moves from the rest state to the operative state; and means (5) for switching off said electromagnetic means upon the mechanical latching of the device.
Claim 4
Dependent Claim
79 words
A single revolution mechanism according to claim 1 wherein: said feed roll (6), which is rotatably mounted on said first lever, is rigidly secured to a camming disc (15) comprising a recess, engaged by a stop (17) of a second lever (16) to latch said feed roll in the rest state, said camming surface being disengaged from said second lever as a result of the movement of said first lever (3) and the rotation of said feed roll, respectively.
Claim 5
Dependent Claim
79 words
A single revolution mechanism according to claim 2 wherein: said feed roll (6), which is rotatably mounted on said first lever, is rigidly secured to a camming disc (15) comprising a recess, engaged by a stop (17) of a second lever (16) to latch said feed roll in the rest state, said camming surface being disengaged from said second lever as a result of the movement of said first lever (3) and the rotation of said feed roll, respectively.
Claim 6
Dependent Claim
83 words
A single revolution mechanism as described in claim 4, wherein: said second lever (16) is pivotably mounted and is held engaged with the recess in the camming surface (15) under the influence of spring force (18, 21), said camming surface being caused to rotate with said feed roll upon reaching said operative position and causing said second lever to pivot against the force of said springs (18, 21), in order to latch said first lever and said feed roll in said operative position.
Claim 7
Dependent Claim
121 words
Single revolution mechanism as described in claim 5, wherein: said second lever (16) rests against a stop (19) in said rest state, said camming surface being partially lifted out of engagement with said stop (17) of said second lever upon its transition from said rest state to said operative state during the movement of said first lever, whereupon said camming surface, in its operative state, exerts a force on said stop (17) or said second lever due to its simultaneous rotation, in consequence whereof said second lever undergoes an angular displacement which is opposed to that of said first lever, for maintaining and latching, under spring force, the pressure with which said feed roll is urged against said continuously rotating shaft.
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |