US3763968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro magnetic braking device
Assignee: Individual
•
Filing: 1972-03-06
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Granted: 1973-10-09
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Expires: 1992-03-06
Abstract
Abstract The electro-magnetic braking device includes two coils concentrically disposed about a magnetizable core having a high residual magnetism capable of holding a brake armature in nonbraking position against a spring bias even when the current is removed form the coils. When it is desired to have the brake armature spring biased into braking position when the current is removed from the coils a demagnetization circuit is connected to one of said coils to demagnetize the core.
Inventors
- 👤 J Noly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:47
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D59/00; F16D59/02; F16D65/00; F16D65/38; F16D2065/383; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22; F16D2123/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
An electro-magnetically controlled brake comprising a rotatable disc, a movable armature, support means guiding said armature non-rotatably toward and away from said disc, coil means mounted on said support means, a stationary component having high residual magnetism disposed in the magnetic circuit of said armature and said coil means, resilient means normally biasing said armature into engagement with said disc to prevent rotation of said disc and control circuit means including said coil means and relay means for magnetizing said component upon energization of said relay means to overcome the force of said resilient means and for automatically de-magnetizing said component upon deenergization of said relay means.
Claim 2
Dependent Claim
107 words
An electro-magnetically controlled brake comprising a rotatable disc, a movable armature, support means guiding said armature non-rotatably toward and away from said disc, coil means mounted on said support means, a stationary component having high residual magnetism disposed in the magnetic circuit of said armature and said coil means, resilient means normally biasing said armature into engagement with said disc to prevent rotation of said disc and control circuit means including said coil means and relay means for magnetizing said component upon energization of said relay means to overcome the force of said resilient means and for automatically de-magnetizing said component upon deenergization of said relay means.
Claim 3
Dependent Claim
33 words
An electro-magnetically controlled brake as set forth in claim 1 wherein said resilient means is comprised of a compression spring and means on said support means for adjusting the force of said spring.
Claim 4
Dependent Claim
47 words
An electro-magnetically controlled brake as set forth in claim 1 wherein said coil means is comprised of two separate windings concentrically arranged around said component, one of said windings being arranged to magnetize said component and the other of said windings being arranged to de-magnetize said component.
Claim 5
Dependent Claim
49 words
An electro-magnetically controlled brake as set forth in claim 3 wherein said relay means includes a first normally open switch connected in series with said one of said windings, a second normally open switch and a third normally closed switch connected in series with said other of said windings.
Claim 6
Dependent Claim
102 words
An electro-magnetically controlled brake as set forth in claim 4 further comprising capacitor means connected in parallel with said third normally closed switch and said other of said windings and connected in series with said second normally open switch whereby upon energization of said relay said second switch will close to charge said capacitor means while said third switch opens to prevent energization of said other of said windings and upon de-energization of said relay said second switch will open and said third switch will close to allow discharge of said capacitor through said other of said windings to de-magnetize said component.
Claim 7
Dependent Claim
37 words
An electro-magnetically controlled brake as set forth in claim 4 further comprising a manually operated switch connected in toto with said first normally open switch to selectively energize said one of said windings to magnetize said component.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |