US3636621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead forming method
Assignee: Micafil Inc
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Filing: 1968-08-26
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Granted: 1972-01-25
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Expires: 1988-08-26
Abstract
Abstract A method of attaching the leads of coils wound onto a slotted armature with the leads wrapped at least partially around the shaft of the armature and then connected to selected commutator hooks circumferentially spaced from the slots in which the coils are laid, which method is characterized by the fact that a pair of concentric sleeves shield the commutator to prevent engagement of the wire with the hooks during winding of the coils; and upon completion of a pair of simultaneously wound coils, rotation of the concentric sleeves both in unison and relative to one another, first in one direction and then the other, exposes the selected hooks and wraps the wire lead about them.
Inventors
- 👤 Raymon H Dammar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:14
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/08; H02K15/09; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T29/49012; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53157
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
349 words
A method of winding an armature having a core with circumferentially spaced coil-receiving slots, a commutator having segments with lead-receiving hooks to which leads from coils that are wound into pairs of the slots are attached, and a shaft on which the core and the commutator are mounted in axially spaced relation, said method comprising the steps of: A. shielding the entire commutator by inserting the same into an open end portion of the inner one of a pair of concentric sleeve members that are rotatable together and with respect to one another; B. winding a coil in a pair of circumferentially spaced slots of the armature core while the commutator is thus shielded; C. upon completion of the coil, holding the ending lead thereof taut and alongside the portion of the armature shaft between the core and the commutator and adjacent to the shielded commutator; D. by rotation of the outer sleeve member in one direction, moving said lead circumferentially about the axis of the armature into tangential engagement with said portion of the armature shaft and into juxtaposition to a selected commutator hook that is circumferentially spaced from the coil slot from which the lead emanates; E. by relative rotation between the sleeve members, exposing only the selected hook and placing the lead in position to be engaged with said hook; F. by rotation together and relative to one another of both sleeve members in the opposite direction, completing engagement of the lead with the hook, reshielding said hook, moving the lead which now extends from said hook circumferentially about the axis of the armature into position to enter directly into the first of the next pair of coil-receiving slots; G. with all of the hooks of the commutator again shielded and with the armature indexed to bring said next pair of slots into winding position, placing the lead directly into the first of said pair of slots to begin the next coil and completing the winding of said next coil; and H. repeating the aforesaid steps until all coil-receiving slots have had coils wound into them.
Claim 2
Independent Claim
349 words
A method of winding an armature having a core with circumferentially spaced coil-receiving slots, a commutator having segments with lead-receiving hooks to which leads from coils that are wound into pairs of the slots are attached, and a shaft on which the core and the commutator are mounted in axially spaced relation, said method comprising the steps of: A. shielding the entire commutator by inserting the same into an open end portion of the inner one of a pair of concentric sleeve members that are rotatable together and with respect to one another; B. winding a coil in a pair of circumferentially spaced slots of the armature core while the commutator is thus shielded; C. upon completion of the coil, holding the ending lead thereof taut and alongside the portion of the armature shaft between the core and the commutator and adjacent to the shielded commutator; D. by rotation of the outer sleeve member in one direction, moving said lead circumferentially about the axis of the armature into tangential engagement with said portion of the armature shaft and into juxtaposition to a selected commutator hook that is circumferentially spaced from the coil slot from which the lead emanates; E. by relative rotation between the sleeve members, exposing only the selected hook and placing the lead in position to be engaged with said hook; F. by rotation together and relative to one another of both sleeve members in the opposite direction, completing engagement of the lead with the hook, reshielding said hook, moving the lead which now extends from said hook circumferentially about the axis of the armature into position to enter directly into the first of the next pair of coil-receiving slots; G. with all of the hooks of the commutator again shielded and with the armature indexed to bring said next pair of slots into winding position, placing the lead directly into the first of said pair of slots to begin the next coil and completing the winding of said next coil; and H. repeating the aforesaid steps until all coil-receiving slots have had coils wound into them.
Claim 3
Dependent Claim
39 words
The method of claim 1, wherein the lead is moved circumferentially around the axis of the armature between 90* and 270* from the coil slot from which it emanates in being brought into juxtaposition to the selected commutator hook.
Claim 4
Dependent Claim
79 words
The method of claim 1, wherein during the first movement of the lead circumferentially about the axis of the armature, the lead is placed adjacent to one side of the selected hook, and wherein during the second movement of the lead circumferentially about the axis of the armature, the lead is carried under and placed at the opposite side of the selected hook. said selected hook being unshielded only during the time the lead is carried under said hook.
Claim 5
Dependent Claim
43 words
The method of claim 1, wherein a pair of coils are simultaneously wound in two pairs of coil slots, and wherein the ending leads from the two coils are simultaneously engaged with selected commutator hooks, while all of the other hooks remain shielded.
Claim 6
Dependent Claim
318 words
In the winding of an armature having a core with circumferentially spaced slots, into pairs of which coils are successively wound, a commutator having segments with hooks onto which leads from the coils are attached, and a shaft on which the core and the commutator are mounted in axially spaced relation, the improvement by which crossover loops and undesirable bridging of leads are eliminated and which improvement is achieved by: A. shielding the commutator hooks; B. with the commutator hooks shielded, winding a coil of wire into a pair of circumferentially spaced core slots; C. upon completion of the coil, holding the ending lead of the coil taut and alongside the portion of the armature shaft between the core and commutator; D. effecting relative motion between the tautly held lead and the armature about the axis of the armature to bring the lead into tangential engagement with said portion of the shaft; E. with the tautly held lead bearing tangentially against said portion of the shaft, rendering accessible a selected coMmutator hook that is circumferentially spaced from the coil slot from which the lead emanates and effecting relative motion between the lead and the armature to produce engagement of the lead with said selected hook; F. reshielding the selected commutator hook; G. again effecting relative motion between the tautly held lead and the armature about the axis of the armature to thereby engage the lead around the selected commutator hook; H. with the armature indexed to dispose the pair of slots into which the next coil is to be wound in winding position, carrying the lead directly into the first of said pair of slots with said stretch of the lead that extends from the engaged commutator hook bearing tangentially against said portion of the armature shaft, and resuming the winding operation; and I. repeating the aforesaid steps until all of the core slots have coils wound therein.
Claim 7
Dependent Claim
318 words
In the winding of an armature having a core with circumferentially spaced slots, into pairs of which coils are successively wound, a commutator having segments with hooks onto which leads from the coils are attached, and a shaft on which the core and the commutator are mounted in axially spaced relation, the improvement by which crossover loops and undesirable bridging of leads are eliminated and which improvement is achieved by: A. shielding the commutator hooks; B. with the commutator hooks shielded, winding a coil of wire into a pair of circumferentially spaced core slots; C. upon completion of the coil, holding the ending lead of the coil taut and alongside the portion of the armature shaft between the core and commutator; D. effecting relative motion between the tautly held lead and the armature about the axis of the armature to bring the lead into tangential engagement with said portion of the shaft; E. with the tautly held lead bearing tangentially against said portion of the shaft, rendering accessible a selected coMmutator hook that is circumferentially spaced from the coil slot from which the lead emanates and effecting relative motion between the lead and the armature to produce engagement of the lead with said selected hook; F. reshielding the selected commutator hook; G. again effecting relative motion between the tautly held lead and the armature about the axis of the armature to thereby engage the lead around the selected commutator hook; H. with the armature indexed to dispose the pair of slots into which the next coil is to be wound in winding position, carrying the lead directly into the first of said pair of slots with said stretch of the lead that extends from the engaged commutator hook bearing tangentially against said portion of the armature shaft, and resuming the winding operation; and I. repeating the aforesaid steps until all of the core slots have coils wound therein.
Claim 8
Dependent Claim
40 words
In the winding of an armature, the improvement set forth in claim 5, wherein said relative motion between the tautly held lead and the armature is produced by imparting motion to the tautly held lead while the armature remains stationary.
Claim 9
Dependent Claim
57 words
The method of claim 6, wherein during said first relative motion, the tautly held lead is moved in one direction around the axis of the armature beyond the selected commutator hook so that the lead engages behind the hook, and wherein said second relative motion is in the reverse direction to carry the lead around the hook.
Claim 10
Dependent Claim
58 words
The method of claim 6, wherein the shielding of the commutator hooks is done by placing the entire commutator in a cup-shaped chamber, and wherein the relative motion between the tautly held lead and the armature is effected by establishing a connection between the lead and the side of said chamber and rotating the chamber around the commutator.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |