US3833871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil connections for an electromagnetic drive
Assignee: Signet Systems Inc
•
Filing: 1973-11-19
•
Granted: 1974-09-03
•
Expires: 1993-11-19
Abstract
Abstract An electromagnetic drive has a uniquely mounted electric coil located within an annular recessed member of the electromagnetic drive to electrically ground the coil to the recessed member along the inner periphery of the coil. A power lead is ultrasonically welded to an insulated outer lead wire of the electric coil so as to have the power lead angularly contact the conductive portion of the lead wire. Energization of the coil by a current passing from the lead wire to the grounded coil produces an electromagnetic field which controls the application of torque between a driving member and a driven member of the electromagnetic drive. The method of mounting the electric coil includes a step wherein the coil is interference pressed onto the annular recessed member in a manner which removes the electrical insulation from the radially inner windings of the coil to electrically ground the coil to the recessed member.
Inventors
- 👤 F Fisher
- 👤 C Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:49
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00421; B60H1/0045; H; H01; H01F; H01F5/00; H01F5/04; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
An electromagnetic coupling assembly for transmitting torque between a driving member and a driven member in response to the energization state of the coupling comprising: energizing means operative to selectively couple the driving and driven member; mounting means having an annular recess with an inner annular surface for mounting said energizing means; said energizing means including an annular electric coil mounted in the recess of said mounting means to have portions of an inner annular surface of said coil in electrical contact with the inner annular surface of the recess of said mounting means; means for connecting one end of said coil to a source of electrical energy to provide energization of said coil by the conduction of current between the one end of said coil and the inner annular surface of said coil in electrical contact with said mounting means; and means for electrically insulating said electric coil from said mounting member in all but portions of the inner annular surface of said coil in electrical contact with said mounting member.
Claim 2
Dependent Claim
172 words
An electromagnetic coupling assembly for transmitting torque between a driving member and a driven member in response to the energization state of the coupling comprising: energizing means operative to selectively couple the driving and driven member; mounting means having an annular recess with an inner annular surface for mounting said energizing means; said energizing means including an annular electric coil mounted in the recess of said mounting means to have portions of an inner annular surface of said coil in electrical contact with the inner annular surface of the recess of said mounting means; means for connecting one end of said coil to a source of electrical energy to provide energization of said coil by the conduction of current between the one end of said coil and the inner annular surface of said coil in electrical contact with said mounting means; and means for electrically insulating said electric coil from said mounting member in all but portions of the inner annular surface of said coil in electrical contact with said mounting member.
Claim 3
Dependent Claim
54 words
An electromagnetic coupling as set forth in claim 1, wherein said mounting means includes a rotatable driving pulley having an annular recess for mounting said electric coil to rotate with said pulley, said pulley further having engaging means for selectively engaging the driven member in response to an energization state of said electric coil.
Claim 4
Dependent Claim
58 words
An electromagnetic coupling as set forth in claim 1 wherein said mounting means includes a stationary mounting member having an annular recess for mounting said electric coil proximately to the driving member and the driven member to effect the coupling of the driven member to the driving member in response to an energization state of said electric coil.
Claim 5
Dependent Claim
58 words
An electromagnetic coupling as set forth in claim 1 wherein said electric coil includes a continuous annular winding of a conductive material and wherein said connecting means includes a power lead connectable to a power source at one end with the other end welded around the periphery of one end of said conductive material of said electric coil.
Claim 6
Dependent Claim
63 words
An electromagnetic coupling as set forth in claim 4 wherein said electrical insulating means includes an insulating coating encasing said conductive material and wherein said power lead is ultrasonically welded to said insulated conductive material and said insulation is removed from said conductive material in the area of said power lead to provide electrical contact between said power lead and said conductive material.
Claim 7
Dependent Claim
31 words
An electromagnetic coupling as set forth in claim 5 wherein said power lead is in angular contact with said conductive material along the periphery of a cross-section of said conductive material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |