Patent US3557694A successfully refreshed from Google Patents.
US3557694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Print head latching mechanism
Assignee: Unisys Corp
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Filing: 1969-04-21
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Granted: 1971-01-26
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Expires: 1989-04-21
Abstract
Abstract The disclosure embodies a latching mechanism to properly position and secure a print head or the like on a shaft and to facilitate the removal and replacement of the print head. The mechanism comprises a plurality of resilient armlike members fixedly mounted on the insertable end of the shaft, said resilient armlike members are angularly displaced inwardly against bias during insertion and return to their normal outwardly biased position when the print head is properly seated on the shaft, and a plunger which is inserted to prevent angular inward displacement of the resilient armlike members.
Inventors
- 👤 Harry L Wallace
- 👤 Bruno Parysek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:10
CPC Classifications
B; B41; B41L; B41L35/00; B41L35/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
In a document endorsing device, an upright driven shaft having an annular flange on a lower portion thereof, a type carrying rotatable head having a bore therethrough receiving an upper end portion of said shaft and seating on said annular flange, means coupling said head to said shaft for rotation therewith, said bore having a portion of enlarged diameter above the upper end of said shaft when said shaft is fully received in said bore, an annular chamfered shoulder at the junction of said bore and the enlarged diameter portion thereof, a pair of oppositely disposed detents yieldably mounted on the upper end of said shaft and biased laterally of said shaft into engagement with said annular chamfered shoulder to oppose relative axial movement of said head on said shaft, and a retractable stop member, movably mounted on a portion of said endorsing device normally positioned between and opposing movement of said detents away from said annular shoulder.
Claim 2
Dependent Claim
158 words
In a document endorsing device, an upright driven shaft having an annular flange on a lower portion thereof, a type carrying rotatable head having a bore therethrough receiving an upper end portion of said shaft and seating on said annular flange, means coupling said head to said shaft for rotation therewith, said bore having a portion of enlarged diameter above the upper end of said shaft when said shaft is fully received in said bore, an annular chamfered shoulder at the junction of said bore and the enlarged diameter portion thereof, a pair of oppositely disposed detents yieldably mounted on the upper end of said shaft and biased laterally of said shaft into engagement with said annular chamfered shoulder to oppose relative axial movement of said head on said shaft, and a retractable stop member, movably mounted on a portion of said endorsing device normally positioned between and opposing movement of said detents away from said annular shoulder.
Claim 3
Dependent Claim
83 words
The mechanism of an endorsing device as defined in claim 1 wherein said means coupling said head to said shaft for rotation therewith comprises: an extended flatted portion formed on said shaft between said annular flange and said pair of oppositely disposed detents, and an extended flatted portion formed in said bore exclusive of said enlarged diameter portion, said flatted portions of said shaft and said bore engageably cooperating as said bore of said head receives said upper end portion of said shaft.
Claim 4
Dependent Claim
58 words
The mechanism of an endorsing device as defined in claim 1 wherein said retractable stop member is a plunger movably mounted in said enlarged diameter portion of said bore of said type carrying rotatable head, said plunger being depressibly activatable to assume said normal position between and opposing movement of said detents away from said annular chamfered shoulder.
Claim 5
Dependent Claim
42 words
The mechanism of an endorsing device as defined in claim 3 wherein said plunger is operatively responsive to the closing of a lid portion of the endorsing device to effectuate said opposing movement of said detents away from said annular chamfered shoulder.
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |