Patent US3720892A successfully refreshed from Google Patents.
US3720892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction for a relay
Assignee: Guardian Electric Manufacturing Co
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Filing: 1972-03-09
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Granted: 1973-03-13
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Expires: 1992-03-09
Abstract
Abstract A sheet of insulating material is positioned between the contact block and the pivotal armature of a relay. The insulating material extends beyond the pivot axis of the armature and engages the lead wires of the relay to maintain the length of the lead wire between the sheet and contact terminals on the block in a substantially fixed position whenever the armature is pivoted.
Inventors
- 👤 L Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
In a relay of the type including a field piece with an armature attached thereto to pivot about a pivot axis, said armature having a contact block mounted thereon, said block including at least one blade with a terminal end, and a lead wire connected between a contact terminal and said terminal end, said lead wire being subjected to bending whenever said armature is pivoted, the improvement comprising, in combination: a thin insulating sheet between said block and said armature, said sheet extending over the surface of said armature and beyond the pivot axis, said sheet including a notch to engage said lead wire and hold the length of lead wire between said notch and said terminal end in a substantially fixed relation during pivotal movement of said armature and attached block.
Claim 2
Dependent Claim
132 words
In a relay of the type including a field piece with an armature attached thereto to pivot about a pivot axis, said armature having a contact block mounted thereon, said block including at least one blade with a terminal end, and a lead wire connected between a contact terminal and said terminal end, said lead wire being subjected to bending whenever said armature is pivoted, the improvement comprising, in combination: a thin insulating sheet between said block and said armature, said sheet extending over the surface of said armature and beyond the pivot axis, said sheet including a notch to engage said lead wire and hold the length of lead wire between said notch and said terminal end in a substantially fixed relation during pivotal movement of said armature and attached block.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |