US3926061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential drive rotating disc impact printer
Assignee: HP Inc
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Filing: 1974-10-02
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Granted: 1975-12-16
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Expires: 1994-10-02
Abstract
Abstract A drive system is provided in which a pair of fixedly mounted motors imparts simultaneous and independent rotational and translational motion to a disc such as a print disc containing a character font. By means of a belt and pulley system, different rotations of the two motors produce different combinations of rotational and translational motions of the disc. The system may also drive elements other than a disc, e.g., a bar and pen arrangement such as that typically employed in an X-Y plotter. A related mechanical system is also disclosed in which translational motion of a pair of rack gears provides simultaneous and independent rotation and translation to a pinion gear. The driving translational motion may also be supplied by a pair of independent belt drives moving parallel or antiparallel to each other.
Inventors
- 👤 Gary L Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/06; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/56; B23Q1/60; B23Q1/62; B23Q1/621; B41; B41J; B41J29/00; B41J29/38; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024; Y10T74/18032; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A differential drive system comprising: a support; first and second drive means fixedly mounted on said support for providing rotational motion; moving means movably positioned for rotational and translational motion with respect to said support; and linking means interconnected between said first and second drive means and said moving means for transmitting forces and torques therebetween, said moving means thereby undergoing motion having rotational and translational components whose magnitudes and directions depend on the relative magnitudes and directions of the rotational motions of said first and second drive means.
Claim 2
Dependent Claim
89 words
A differential drive system comprising: a support; first and second drive means fixedly mounted on said support for providing rotational motion; moving means movably positioned for rotational and translational motion with respect to said support; and linking means interconnected between said first and second drive means and said moving means for transmitting forces and torques therebetween, said moving means thereby undergoing motion having rotational and translational components whose magnitudes and directions depend on the relative magnitudes and directions of the rotational motions of said first and second drive means.
Claim 3
Dependent Claim
41 words
A differential drive system as in claim 1 wherein: said first and second drive means comprise a pair of substantially identical motors; and said linking means comprises a continuous belt linking said first and second drive means and said moving means.
Claim 4
Dependent Claim
22 words
A differential drive system as in claim 2 wherein said moving means comprises a cylinder movably positioned for rotational and translational motion.
Claim 5
Dependent Claim
80 words
A differential drive system as in claim 3 wherein: said linking means further comprises a pair of pulleys; and said continous belt engages one of said pair of motors and one of said pair of pulleys, thence engaging a portion of the perimeter of said cylinder in one direction, thence engaging the other of said pulleys and the other of said motors, and again engaging another portion of the perimeter of said disc in another direction opposite said one direction.
Claim 6
Dependent Claim
68 words
A differential drive system as in claim 2 wherein said moving means comprises: a bar movably mounted for translation along a first axis; a pair of pulleys mounted on said bar for engagement with said continuous belt; and an additional member affixed to said continuous belt adjacent said bar for rotation about said bar producing in part a translation along a second axis perpendicular to said first axis.
Claim 7
Dependent Claim
73 words
A differential drive system comprising: a support; first and second drive means mounted for substantially parallel or antiparallel translational motion therebetween; moving means interconnected with said first and second drive means and movably positioned for rotational and translational motion with respect to said support, said moving means undergoing motion having rotational and translational components whose magnitudes and directions depend on the relative magnitude and direction of the translational motion between said drive means.
Claim 8
Dependent Claim
73 words
A differential drive system comprising: a support; first and second drive means mounted for substantially parallel or antiparallel translational motion therebetween; moving means interconnected with said first and second drive means and movably positioned for rotational and translational motion with respect to said support, said moving means undergoing motion having rotational and translational components whose magnitudes and directions depend on the relative magnitude and direction of the translational motion between said drive means.
Claim 9
Dependent Claim
37 words
A differential drive system as in claim 6 wherein: said first and second drive means comprise first and second rack gears; and said moving means comprises a pinion gear mounted in geared relation between said rack gears.
Claim 10
Dependent Claim
53 words
A differential drive system as in claim 6 wherein: said first and second drive means comprise first and second rotational drive means; and first and second belt means interconnected with said first and second rotational drive means respectively for providing substantially parallel or antiparallel translational motion between said fiRst and second belt means.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |