US3683411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding pen-driving current
Assignee: Iwatsu Electric Co Ltd
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Filing: 1970-08-17
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Granted: 1972-08-08
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Expires: 1990-08-17
Abstract
Abstract An apparatus for feeding pen-driving current through a feeding wire to movable pen means including a wire winding drum rotatably journaled to a fixed member, the feeding wire being wound around the drum, and resilient means urging the drum to turn in the winding direction of the wire.
Inventors
- 👤 Tetsusaburo Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:00
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
270 words
An apparatus for feeding pen-driving current comprising a feeding member and pen means traveling relative thereto, a cablewinding drum rotatably attached to said member, current feeding wire, resilient means normally urging said drum in one direction of rotation for winding said current-Feeding wire about the outer circumference of the drum, said drum being rotatably journaled on a fixed axis to said feeding member and wherein said resilient means comprises a spiral spring associating its inner end with said axis and, concurrently, its outer end with said drum, said feeding wire comprising a winding portion and outer and inner end portions, means electrically connecting the outer end of said winding portion to said pen means and means electrically connecting the inner end of said winding portion to a signal source or control operating to unwind or rewind current feeding wire in relation to the travel direction and distance of said pen means relative to said feeding means, said resilient means operating to avoid any sag in said winding portion between said drum and said pen means, and wherein said feeding wire is provided with a second winding portion wound loosely between the outer circumference of said fixed axis and the inner circumference of said drum, the outer end of said second winding portion being electrically connected with the inner end of said first winding portion, and the inner end of said second winding portion stretching outside through a center hole defined by said fixed axis whereby said feeding wire can avoid twisting when said drum rotates, said inner end of said second winding portion extending to said signal source or control.
Claim 2
Independent Claim
270 words
An apparatus for feeding pen-driving current comprising a feeding member and pen means traveling relative thereto, a cablewinding drum rotatably attached to said member, current feeding wire, resilient means normally urging said drum in one direction of rotation for winding said current-Feeding wire about the outer circumference of the drum, said drum being rotatably journaled on a fixed axis to said feeding member and wherein said resilient means comprises a spiral spring associating its inner end with said axis and, concurrently, its outer end with said drum, said feeding wire comprising a winding portion and outer and inner end portions, means electrically connecting the outer end of said winding portion to said pen means and means electrically connecting the inner end of said winding portion to a signal source or control operating to unwind or rewind current feeding wire in relation to the travel direction and distance of said pen means relative to said feeding means, said resilient means operating to avoid any sag in said winding portion between said drum and said pen means, and wherein said feeding wire is provided with a second winding portion wound loosely between the outer circumference of said fixed axis and the inner circumference of said drum, the outer end of said second winding portion being electrically connected with the inner end of said first winding portion, and the inner end of said second winding portion stretching outside through a center hole defined by said fixed axis whereby said feeding wire can avoid twisting when said drum rotates, said inner end of said second winding portion extending to said signal source or control.
References Cited (Backward Citations)
US2751565A
Cited
US3351949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |