US3958200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade construction for relay
Assignee: Guardian Electric Manufacturing Co
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Filing: 1975-01-09
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Granted: 1976-05-18
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Expires: 1995-01-09
Abstract
Abstract An improved spring leaf construction for relays includes a cantilever blade fabricated to cooperate with a tapered lead post. The end of the blade which is attached to the post includes a pair of parallel slits defining a bridging portion. The bridging portion is friction fitted over the post and tightly engages that post. Preferably, a tapered post construction is utilized in combination with the improved cantilever blade.
Inventors
- 👤 Frank X. Mally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:53
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; H01H50/00; H01H50/16; H01H50/18; H01H50/24; H01H50/28; H01H50/54; H01H50/56; H01H51/00; H01H51/02; H01H51/04; H01H51/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
An improved spring leaf construction for relays comprising, in combination: a generally cylindrical post having circular cross section; and a cantilever blade having a contact end and a post connection end, said post connection end including a continuous, planar section with first and second parallel slits extending substantially in the direction of the longitudinal axis of the blade, said slits defining an intermediate portion and flanking side portions, said intermediate portion extending transversely from said side portions to define an opening encircling the post and edges scarifying said post, whereby said blade is retained in substantially non-rotatable position on said post to provide a spring leaf.
Claim 2
Dependent Claim
106 words
An improved spring leaf construction for relays comprising, in combination: a generally cylindrical post having circular cross section; and a cantilever blade having a contact end and a post connection end, said post connection end including a continuous, planar section with first and second parallel slits extending substantially in the direction of the longitudinal axis of the blade, said slits defining an intermediate portion and flanking side portions, said intermediate portion extending transversely from said side portions to define an opening encircling the post and edges scarifying said post, whereby said blade is retained in substantially non-rotatable position on said post to provide a spring leaf.
Claim 3
Dependent Claim
21 words
The improved construction of claim 1 in combination with a tapered post, said post tapered to define a substantially frusto-conical surface.
Claim 4
Dependent Claim
58 words
The improved construction of claim 1 in combination with a relay of the type including a coil and an armature pivotally mounted for response to current through said coil, said cantilever blade being attached to said armature and normally biasing said armature in a first direction opposite the direction imparted by current in said coil to said armature.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |