US3798756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing recording heads
Assignee: Robert Bosch GmbH
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Filing: 1972-05-25
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Granted: 1974-03-26
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Expires: 1992-05-25
Abstract
Abstract The method of constructing recording heads includes the steps of positioning a plurality of contact pins between spaced parallel threaded rods and winding a wire uniformly and under tension around the latter, adjacent turns being placed into successive grooves of the threads. The contact pins are displaced from one another in the direction of the turns, and the parallel turns are each connected to one of the contact pins. The portions of the turns between the rods are embedded in an insulating material. Each rod has a longitudinal groove over which the turns pass and the latter are cut along each groove to produce free ends which are ground and sharpened to provide suitable writing electrodes, and recording heads produced in accordance with this method.
Inventors
- 👤 H Bauerlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/39; B41J2/395; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
110 words
Method of constructing recording heads comprising the steps of positioning a pluRality of connector electrodes mounted on at least one isolating plate between at least two spaced rods; uniformly winding a wire under tension around said at least two spaced rods so that adjacent turns are substantially parallel to one another; connecting each turn to another of said connector electrodes; embedding adjacent portions of the turns located between the two spaced rods in insulating material to permanently fix the parallel relationship of the adjacent portions; and severing the turns in the region of the spaced rods to form free ends respectively for the embedded portions located between the spaced rods.
Claim 2
Dependent Claim
110 words
Method of constructing recording heads comprising the steps of positioning a pluRality of connector electrodes mounted on at least one isolating plate between at least two spaced rods; uniformly winding a wire under tension around said at least two spaced rods so that adjacent turns are substantially parallel to one another; connecting each turn to another of said connector electrodes; embedding adjacent portions of the turns located between the two spaced rods in insulating material to permanently fix the parallel relationship of the adjacent portions; and severing the turns in the region of the spaced rods to form free ends respectively for the embedded portions located between the spaced rods.
Claim 3
Dependent Claim
16 words
Method as defined in claim 1, wherein the step of severing comprises the step of cutting.
Claim 4
Dependent Claim
35 words
Method as defined in claim 1, wherein said rods are each provided with a screw thread, and wherein the step of winding comprises engaging each turn in a successive groove of the respective screw thread.
Claim 5
Dependent Claim
77 words
Method as defined in claim 1, wherein the adjacent portions of the turns located between the spaced rods and on opposite sides thereof define two substantially parallel planes, and wherein one isolating plate carrying connector electrodes is positioned adjacent to each plane between the spaced rods prior to the winding step; and wherein the step of connecting comprises connecting the adjacent portions lying in one plane to the respective electrodes carried on the corresponding adjacent isolating plate.
Claim 6
Dependent Claim
12 words
Method as defined in claim 1, wherein said connecting step comprises soldering.
Claim 7
Dependent Claim
12 words
Method as defined in claim 1, wherein said connecting step comprises welding.
Claim 8
Dependent Claim
32 words
Method as defined in claim 1, wherein said imbedding step is carried out subsequently to said connecting step to thereby also imbed the connecting points between the turns and the connector electrodes.
Claim 9
Dependent Claim
50 words
Method as defined in claim 1, wherein each spaced rod is provided with a longitudinal slot open in a direction which faces away from the other respective rod, the turns passing over said slots when wound under tension, and wherein the severing step comprises cutting the turns along the slots.
Claim 10
Dependent Claim
115 words
Method of constructing recording heads comprising the steps of uniformly winding a wire under tension around said at least two spaced rods so that adjacent turns are substantially parallel to one another; imbedding adjacent portions of the turns located between the two spaced rods in insulating material to permanently fix the parallel relationship of the adjacent portions; severing the turns in the region of the spaced rods to form free ends respectively for the imbedded portions located between the spaced rods; fixing the free ends in a binding material; trimming the free ends to make them all lie along a straight line; and finshing the free ends to provide pointed ends suitable for recording heads.
Claim 11
Dependent Claim
115 words
Method of constructing recording heads comprising the steps of uniformly winding a wire under tension around said at least two spaced rods so that adjacent turns are substantially parallel to one another; imbedding adjacent portions of the turns located between the two spaced rods in insulating material to permanently fix the parallel relationship of the adjacent portions; severing the turns in the region of the spaced rods to form free ends respectively for the imbedded portions located between the spaced rods; fixing the free ends in a binding material; trimming the free ends to make them all lie along a straight line; and finshing the free ends to provide pointed ends suitable for recording heads.
Claim 12
Dependent Claim
13 words
Method as defined in claim 9, wherein the step of finishing comprises grinding.
Claim 13
Dependent Claim
14 words
Method as defined in claim 9, wherein the step of trimming comprises removing burrs.
Claim 14
Dependent Claim
22 words
Method as defined in claim 9, further comprising the steps of removing the binding material after said trimming and said finishing steps.
References Cited (Backward Citations)
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |