US3560804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery-feed and impulsing circuit using a fast-operating relay
Assignee: Automatic Electric Laboratories Inc
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Filing: 1969-07-14
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Granted: 1971-02-02
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Expires: 1989-07-14
Abstract
Abstract A reed relay has an operating winding connected in series with an audiofrequency choke coil and an auxiliary winding coupled to the choke coil to aid fast operation and release of the contacts of the relay. The choke coil provides high impedance to voice signals, and its coupling to the auxiliary winding compensates for the tendency of the relay to operate more slowly than usual as a result of the inclusion of the high inductance of the choke coil in the operating circuit of the relay. Also, the auxiliary winding causes release of the contacts even though line leakage current is excessive. A varistor effectively functions to disconnect the auxiliary winding during transmission of voice signals.
Inventors
- 👤 Emiel Goossens
- 👤 Herman Labedz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:50
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
179 words
A battery-feed and impulsing relay circuit comprising: a telephone line, an electromagnetic switching element, an operating winding and an auxiliary winding magnetically coupled directly to said switching element to induce magnetic flux through said element in response to flow of current through said windings, the operation and release of said element being determined by current flow in said operating winding, the magnetic flux being modified to change the rate of the operation and release of said switching element in response to current flow in said auxiliary winding, a choke coil, a sOurce of direct current, an operating circuit for said switching element including said source, said choke coil, said operating winding and said line connected sequentially, coupling means for coupling said auxiliary winding to said choke coil to induce current in said auxiliary winding in response to change of magnetic field of said choke coil as a result of change of current in said operating winding, and said auxiliary winding being connected in the required sense to aid said operating winding in operating and in releasing said switching element.
Claim 2
Dependent Claim
179 words
A battery-feed and impulsing relay circuit comprising: a telephone line, an electromagnetic switching element, an operating winding and an auxiliary winding magnetically coupled directly to said switching element to induce magnetic flux through said element in response to flow of current through said windings, the operation and release of said element being determined by current flow in said operating winding, the magnetic flux being modified to change the rate of the operation and release of said switching element in response to current flow in said auxiliary winding, a choke coil, a sOurce of direct current, an operating circuit for said switching element including said source, said choke coil, said operating winding and said line connected sequentially, coupling means for coupling said auxiliary winding to said choke coil to induce current in said auxiliary winding in response to change of magnetic field of said choke coil as a result of change of current in said operating winding, and said auxiliary winding being connected in the required sense to aid said operating winding in operating and in releasing said switching element.
Claim 3
Dependent Claim
19 words
In a relay circuit according to claim 1 in which said electromagnetic switching element is an encapsulated reed relay.
Claim 4
Dependent Claim
30 words
In a relay circuit according to claim 2 in which said coupling means includes a capacitor, said capacitor and said auxiliary winding being connected in series across said choke coil.
Claim 5
Dependent Claim
23 words
In a relay circuit according to claim 3 in which a varistor is connected in series with said capacitor and said auxiliary winding.
Claim 6
Dependent Claim
31 words
In a relay circuit according to claim 2 in which said choke coil has an additional winding, said coupling means including said additional winding connected in series with said auxiliary winding.
Claim 7
Dependent Claim
23 words
In a relay circuit according to claim 5 in which a varistor is connected in series with said additional winding and said auxiliary.
References Cited (Backward Citations)
US3492613A
Cited
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 |