US3817359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single or multirevolution pawl clutch
Assignee: Walther Bueromaschinen GmbH
•
Filing: 1973-05-02
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Granted: 1974-06-18
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Expires: 1993-05-02
Abstract
Abstract A single or multirevolution pawl clutch for coupling rotating transfer systems comprises driving and driven shafts mounted in a housing and a pawl mounted on the driven shaft. A stationary ratchet ring surrounds the driven shaft and has teeth thereon engageable by the pawl. A driving member is drivingly connected to the driving shaft by gearing and has teeth thereon engageable by the pawl which is urged into engagement with the driving member by a spring. A magnetic coil can be energized by pulse signals so that upon energization the pawl is magnetically attracted into engagement with the ratchet ring such that the driven shaft is disengaged and upon the energization the pawl is engaged with the driving member under the action of the spring to engage the driven shaft.
Inventors
- 👤 G Haupt
- 👤 E Lassle
- 👤 K Heisele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/38; F; F16; F16D; F16D43/00; F16D43/02; F16D43/26; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1524
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
In a single or multirevolution pawl clutch for coupling rotating transfer systems, such as high speed printing units in office machines, the combination of driving and driven shafts, a pawl mounted oN said driven shaft, a stationary ratchet ring surrounding said driven shaft and engageable by said pawl, a driving member drivingly connected to said driving shaft and engageable by said pawl, spring means urging said pawl into engagement with said driving member, and a magnetic coil adapted to be selectively energized by pulse signals so that upon energization of the coil, said pawl is magnetically attracted into engagement with said stationary ratchet ring to disengage said driven shaft and upon deenergization of said coil said pawl is engaged with said driving member under the action of said spring means to engage said driven shaft.
Claim 2
Dependent Claim
135 words
In a single or multirevolution pawl clutch for coupling rotating transfer systems, such as high speed printing units in office machines, the combination of driving and driven shafts, a pawl mounted oN said driven shaft, a stationary ratchet ring surrounding said driven shaft and engageable by said pawl, a driving member drivingly connected to said driving shaft and engageable by said pawl, spring means urging said pawl into engagement with said driving member, and a magnetic coil adapted to be selectively energized by pulse signals so that upon energization of the coil, said pawl is magnetically attracted into engagement with said stationary ratchet ring to disengage said driven shaft and upon deenergization of said coil said pawl is engaged with said driving member under the action of said spring means to engage said driven shaft.
Claim 3
Dependent Claim
36 words
In a pawl clutch as claimed in claim 1 and a housing, said driving and driven shafts being mounted on said housing, and light barrier means for each of said shafts fixedly mounted on said housing.
Claim 4
Dependent Claim
60 words
In a pawl clutch as claimed in claim 2 and a gear on said driving shaft and having a plurality of light slits therein corresponding in number to the teeth on said driving member, and a timer disk on said driven shaft and having a plurality of light slits therein corresponding in number to the teeth on said ratchet ring.
Claim 5
Dependent Claim
105 words
In a pawl clutch as claimed in claim 3 wherein said pawl has a locking edge engageable with said driving member and an abutment edge engageable with said ratchet ring, the light slits on said gear and timer disk having the same angular relationship as the teeth on said driving member and ratchet ring respectively whereby a control signal can be delivered at that point of time when a tooth of said driving member is positioned in a radial plane with said pawl edge and when a tooth of said ratchet ring is positioned in a radial plane with the abutment edge of said pawl.
Claim 6
Dependent Claim
48 words
In a pawl clutch as claimed in claim 4 wherein the engaging of said pawl with one of said engaging member and ratchet ring is effected synchronously with a control pulse following a tooth edge of said driving member and a tooth edge of said ratchet ring respectively.
Claim 7
Dependent Claim
42 words
In a pawl clutch as claimed in claim 4 wherein said driven shaft is decelerated upon the magnetic attraction of said pawl to said ratchet ring until said pawl engages a tooth thereof to stop said driven shaft in a predetermined position.
References Cited (Backward Citations)
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Cited
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Cited
US2647600A
Cited
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Cited
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Cited
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |