US3559899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toroidal coil-winding machine for deflection yoke coils for television picture tubes and the like
Assignee: Magnatech International Inc
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Filing: 1969-02-24
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Granted: 1971-02-02
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Expires: 1989-02-24
Abstract
Abstract A machine for winding toroidal coils useful for yokes of television picture tubes having an air motor for loading the magazine and for winding the coil under uniform tension. An indexing mechanism comprising an index plate under control of a double-throw pawl effects precisely located winding turns on the inner face of the toroidal yoke core facing the outer surface of the television picture tube. The index plate of the indexing means is arranged for a plurality of different winding configurations and in combination with the double-throw pawl winding assures accurate and precise winding without damage to the teeth of the index plate.
Inventors
- 👤 Rudolf Fahrbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:09
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/08; H01F41/071; H01F2041/0711
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
A toroidal coil-winding machine for television deflection yoke coils and the like, said machine having a magazine adapted to be loaded with wire and driven about its axis through a toroidal core, in combination: a. an index plate having notched teeth on the periphery thereof with one radial inner face; b. means for rotating said plate about an axis through the center of the core to be wound; c. a core clamp mounted on said index plate for holding a core in fixed horizontal position relative to said plate; and d. pawl means having a pawl tip for engaging each tooth on said plate in sequence including a double-acting lever means for reciprocating said pawl tip in substantially radial direction relative to said index plate to avoid thereby engaging the sidewall of said teeth during relative movement of said pawl and plate.
Claim 2
Dependent Claim
142 words
A toroidal coil-winding machine for television deflection yoke coils and the like, said machine having a magazine adapted to be loaded with wire and driven about its axis through a toroidal core, in combination: a. an index plate having notched teeth on the periphery thereof with one radial inner face; b. means for rotating said plate about an axis through the center of the core to be wound; c. a core clamp mounted on said index plate for holding a core in fixed horizontal position relative to said plate; and d. pawl means having a pawl tip for engaging each tooth on said plate in sequence including a double-acting lever means for reciprocating said pawl tip in substantially radial direction relative to said index plate to avoid thereby engaging the sidewall of said teeth during relative movement of said pawl and plate.
Claim 3
Dependent Claim
100 words
A machine according to claim 1 wherein said core clamp comprises: a. an upper and lower jaw for holding a core in fixed position; b. a first spring for holding said upper jaw resiliently against said core; c. a lever-actuated cam for compressing said spring in one position and expanding said spring in a second position; and d. a second spring connected between said jaws and adapted to be compressed when said first spring is compressed and to be expanded when said 6-position spring is expanded to thereby cause said jaws to rapidly separate when said first spring is expanded.
Claim 4
Dependent Claim
35 words
A machine according to claim 1 wherein an air motor rotates said magazine for the wire-loading phase at a high operating pressure and brakes said magazine during the core-winding phase at a low operating pressure.
Claim 5
Dependent Claim
31 words
A machine according to claim 3 including centrifugal cutoff means for stopping the rotation of said magazine when the rotation thereof exceeds a selected speed by rendering inoperative said air motor.
Claim 6
Dependent Claim
61 words
A machine according to claim 1 wherein said magazine is supported within a C-frame support by four idler rollers and two drive rollers, said rollers being mounted on a rib extending radially inwardly from the inner surfacE of said C-frame, said rollers being located to support said magazine in a substantially symmetrically balanced position relative to said C-frame and said core.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |