Patent US486739A successfully refreshed from Google Patents.
US3666070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential mechanism for positioning a type character on a type element
Assignee: International Business Machines Corp
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Filing: 1970-06-29
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Granted: 1972-05-30
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Expires: 1990-06-29
Abstract
Abstract A type element, which is mounted for movement along a writing line and has a plurality of types arranged thereon, is rotated through a differential mechanism to position a selected type at the printing position. The differential mechanism includes a first gear connected to the type element through a rotatably supported shaft. A sector gear meshes with the first gear to rotate the first gear in one direction in accordance with inputs to an arm on which the sector gear is mounted. The arm is pivotally connected by a pin to a link, which is pivotally mounted about the axis of the first gear, so that movements of the link change the position of the pin, which is the axis of rotation of the sector gear and is intermediate the sector gear and the input end of the arm, to rotate the first gear in the opposite direction. The inputs to the link and the arm are supplied through separate lever arrangements, which may be actuated by a single driving means or by separate pneumatically controlled means.
Inventors
- 👤 John O Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:12
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/54; B41J7/56; B41J7/60
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
192 words
A printer having a type element carrying a plurality of types at regular intervals spaced along a path, means cooperating with said type element for defining a printing position in cooperation therewith, means mounting said type element for movement along said path to position a selected one of said types at the printing position wherein the improvement comprises: a positioning member connected to said type element for movement therewith relative to the mounting means; a first gear connected to said positioning member for motion therewith relative to the mounting means; a second gear positioned in operative mesh with said first gear; a modifying link mounted for pivotal motion about an axis that is fixed with respect to said positioning member; axle means mounting said second gear for pivotal motion about an axis that is displaced from said positioning member, said axle means being mounted on said modifying link; first input means for positioning said modifying link to any of a predetermined plurality of pivotal positions about said positioning member; and second input means for positioning said second gear to any of a predetermined plurality of pivotal positions relative to said axle means.
Claim 2
Dependent Claim
192 words
A printer having a type element carrying a plurality of types at regular intervals spaced along a path, means cooperating with said type element for defining a printing position in cooperation therewith, means mounting said type element for movement along said path to position a selected one of said types at the printing position wherein the improvement comprises: a positioning member connected to said type element for movement therewith relative to the mounting means; a first gear connected to said positioning member for motion therewith relative to the mounting means; a second gear positioned in operative mesh with said first gear; a modifying link mounted for pivotal motion about an axis that is fixed with respect to said positioning member; axle means mounting said second gear for pivotal motion about an axis that is displaced from said positioning member, said axle means being mounted on said modifying link; first input means for positioning said modifying link to any of a predetermined plurality of pivotal positions about said positioning member; and second input means for positioning said second gear to any of a predetermined plurality of pivotal positions relative to said axle means.
Claim 3
Dependent Claim
22 words
A printer as defined in claim 1 including single drive means to synchronously move both of said first and second input means.
Claim 4
Dependent Claim
89 words
A printer as defined in claim 2 wherein: said single drive means comprises a rotatable cam having a plurality of different cam surfaces; said first input means has means cooperating with said cam; said second input means has means cooperating with said cam; selector means to position said cooperating means of said first input means on one of the cam surfaces of said cam and said cooperating means of said second input means on one of the cam surfaces of said cam; and means to control said positioning means.
Claim 5
Dependent Claim
91 words
A printer as defined in claim 3 in which: each of said first input means and second input means comprises lever means; said lever means of said first input means being connected to said modifying link; said lever means of said second input means being connected to said second gear; said lever means of said first input means has said cam cooperating means of said first input means connected thereto; and said lever means of said second input means has said cam cooperating means of said second input means connected thereto.
Claim 6
Dependent Claim
130 words
A printer as defined in claim 4 in which said selector means includes: a plurality of selector cams; a pair of elements for cooperation with each of said selector cams, one of said elements of each pair being mounted on said first input means and the other of said elements of each pair being mounted on said second input means; and means for selectively positioning each of said selector cams relative to said pair of elements cooperating therewith to dispose said selector cam in a first position in which said selector cam engages neither of said elements, a second position in which said selector cam engages said element on said first input means, and a third position in which said selector cam engages said element on said second input means.
Claim 7
Dependent Claim
130 words
A printer as defined in claim 3 in which said selector means includes; a plurality of selector cams; a pair of elements for cooperation with each of said selector cams, one of said elements of each pair being mounted on said first input means and the other of said elements of each pair being mounted on said second input means; and means for selectively positioning each of said selector cams relative to said pair of elements cooperating therewith to dispose said selector cams in a first position in which said selector cam engages neither of said elements, a second position in which said selector cam engages said element on said first input means, and a third position in which said selector cam engages said element on said second input means.
Claim 8
Dependent Claim
27 words
A printer as defined in claim 3 in which: said mounting means for said type element is a movable carrier; and stationary means supports said control means.
Claim 9
Dependent Claim
38 words
A printer as defined in claim 2 in which: said first gear has teeth around its entire periphery; And said second gear has teeth along only a sector thereof and meshing with said teeth on said first gear.
Claim 10
Dependent Claim
52 words
A printer as defined in claim 2 in which: each of said first input means and said second input means comprises lever means; said lever means of said first input means being connected to said modifying link; and said lever means of said second input means being connected to said second gear.
Claim 11
Dependent Claim
27 words
A printer as defined in claim 2 including resilient means yieldably exerting an opposing force against each of said first input means and said second input means.
Claim 12
Dependent Claim
58 words
A printer as defined in claim 2 in which said first input means and said second input means produce rotation of said first gear in opposite directions to rotate said first gear in a direction depending on which of said first input means and said second input means produces the input of largest magnitude and the difference therebetween.
Claim 13
Dependent Claim
65 words
A printer as defined in claim 1 including: first driving means cooperating with said first input means to move said first input means to position said modifying link at any of its plurality of predetermined positions; and second driving means cooperating with said second input means to move said second input means to position said second gear at any of its plurality of predetermined positions.
Claim 14
Dependent Claim
27 words
A printer as defined in claim 12 including: first pneumatic means to control said first driving means; and second pneumatic means to control said second driving means.
Claim 15
Dependent Claim
58 words
A printer as defined in claim 12 in which said first input means and said second input means produce rotation of said first gear in opposite directions to rotate said first gear in a direction depending on which of said first input means and said second input means produces the input of largest magnitude and the difference therebetween.
Claim 16
Dependent Claim
38 words
A printer as defined in claim 1 in which: said first gear has teeth around its entire periphery; and said second gear has teeth along only a sector thereof and meshing with said teeth on said first gear.
Claim 17
Dependent Claim
58 words
A printer as defined in claim 1 in which said first input means and said second input means produce rotation of said first gear in opposite directions to rotate said first gear in a direction depending on which of said first input means and said second input means produces the input of largest magnitude and the difference therebetween.
Claim 18
Dependent Claim
27 words
A printer as defined in claim 1 including resilient means yieldably exerting an opposing force against each of said first input means and said second input means.
Claim 19
Dependent Claim
52 words
A printer as defined in claim 1 in which: each of said first input means and said second input means comprises lever means; said lever means of said first input means being connected to said modifying link; and said lever means of said second input means being connected to said second gear.
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |