US3763448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relays
Assignee: Individual
•
Filing: 1972-03-29
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Granted: 1973-10-02
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Expires: 1992-03-29
Abstract
Abstract An Electromagnetic relay having a modular coil formed by a number of independent coil modules. The relay is also provided with movable contact units which includes a number of contact sets. Each contact set having at least one pair of contact arms namely a movable contact arm and a fixed contact arm. A removable rest plate for the contact arms is provided in order that the contact arms of each contact set may make or break in a predetermined sequence.
Inventors
- 👤 J Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; H01H50/58; H01H50/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
An electromagnetic relay which comprises in combination: A. a base plate; B. an inner magnetic core mounted on the base plate; C. a movable contact unit mounted on the base plate and disposed adjacent one end of the core; D. a plurality of independent coil modules removably mounted on a common core to form an outer modular coil having a common magnetic axis; E. end plates disposed between adjacent coil modules, said end plates having projecting terminals in communication with an associated coil module; F. electrical input means connected to each coil module by means of said projecting terminals; G. electrical connection means adapted for electrically interconnecting the coil modules; and H. a printed circuit board disposed adjacent to the coils and relative the length of the magnetic axis and having electrical connections disposed for receiving said projecting terminals.
Claim 2
Dependent Claim
139 words
An electromagnetic relay which comprises in combination: A. a base plate; B. an inner magnetic core mounted on the base plate; C. a movable contact unit mounted on the base plate and disposed adjacent one end of the core; D. a plurality of independent coil modules removably mounted on a common core to form an outer modular coil having a common magnetic axis; E. end plates disposed between adjacent coil modules, said end plates having projecting terminals in communication with an associated coil module; F. electrical input means connected to each coil module by means of said projecting terminals; G. electrical connection means adapted for electrically interconnecting the coil modules; and H. a printed circuit board disposed adjacent to the coils and relative the length of the magnetic axis and having electrical connections disposed for receiving said projecting terminals.
Claim 3
Dependent Claim
26 words
A electromagnetic relay as recited in claim 1 in which the electrical input means and the electrical connection means are formed by a printed circuit board.
Claim 4
Dependent Claim
22 words
An electromagnetic relay as recited in claim 2 in which the printed circuit board electrically connects the coil modules electrically in series.
Claim 5
Dependent Claim
22 words
An electromagnetic relay as recited in claim 2 in which the printed circuit board electrically connects the coil modules electrically in parallel.
Claim 6
Dependent Claim
38 words
An electromagnetic relay as recited in claim 2 in which there are three coil modules, the printed circuit board electrically connects two of the coil modules together in series and then in parallel with the third coil module.
Claim 7
Dependent Claim
56 words
An electromagnetic relay as recited in claim 2 in which the base plate is provided with an upstanding support, and in which the core has a collar formed on one end and a threaded portion on its other end whereby the threaded portion engages the upstanding support and the core is cantilevered across the base plate.
Claim 8
Dependent Claim
107 words
An electromagnetic relay as recited in claim 1 in which the movable contact unit comprises: an armature pivotally mounted intermediate its ends on the base plate to form two free legs, one free leg being located adjacent the end of the core for magnetic engagement with the core; a lift plate mounted on the other free leg of the armature; a rest plate mounted in the base plate adjacent the lift plate; a contact set mounted on the base plate and having at least one movable contact arm which engages the lift plate and the same number of co-operating fixed contact arms which engage the rest plate.
Claim 9
Dependent Claim
35 words
An electromagnetic relay as recited in claim 7 in which the rest plate is of stepped construction whereby each movable contact arm engage or disengage from the co-operating fixed contact arm in a predetermined sequence.
Claim 10
Dependent Claim
20 words
An electromagnetic relay as recited in claim 8 in which the rest plate is releasably mounted on the base plate.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |