US3910224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Failsafe device
Assignee: Individual
•
Filing: 1973-10-23
•
Granted: 1975-10-07
•
Expires: 1993-10-23
Abstract
Abstract Failsafe device providing warning of impending failure of any member subject to such failure such as machine parts, electrical power transmission lines, structural members, utility pole arms, and the like, including a housing attached to the member; and a warning bar mounted in the housing for movement to a warning position prior to fatigue failure of the member.
Inventors
- 👤 Hugh A Thompson
- 👤 Jr F Michael Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:32
CPC Classifications
G; G08; G08B; G08B21/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A failsafe device providing warning of impending failure of a member subject to fatigue stresses, comprising: a member that is subject to the vibration of fatigue stress; a housing; clamp means for clamping said housing for vibration with said member; warning means mounted in said housing for movement between a normal position and a warning position; failsafe means for supporting said warning means in said normal position and for releasing said warning means for movement to said warning position prior to failure of said member; said housing having opposing side walls; said warning means being a warning bar mounted for movement between said normal position, in which said warning bar is positioned between said side walls, and a warning position, in which said warning bar is positioned outwardly of said side walls; said housing side walls having aligned openings therein and said warning bar having an opening therein; a shaft extending through said aligned openings in said housing side walls and said warning bar; and said shaft being positioned out of engagement with said warning bar.
Claim 2
Dependent Claim
176 words
A failsafe device providing warning of impending failure of a member subject to fatigue stresses, comprising: a member that is subject to the vibration of fatigue stress; a housing; clamp means for clamping said housing for vibration with said member; warning means mounted in said housing for movement between a normal position and a warning position; failsafe means for supporting said warning means in said normal position and for releasing said warning means for movement to said warning position prior to failure of said member; said housing having opposing side walls; said warning means being a warning bar mounted for movement between said normal position, in which said warning bar is positioned between said side walls, and a warning position, in which said warning bar is positioned outwardly of said side walls; said housing side walls having aligned openings therein and said warning bar having an opening therein; a shaft extending through said aligned openings in said housing side walls and said warning bar; and said shaft being positioned out of engagement with said warning bar.
Claim 3
Dependent Claim
31 words
The structure set forth in claim 1, wherein said failsafe means includes: a failsafe member attached to said housing, said failsafe member being designed to fail at a failsafe fatigue limit.
Claim 4
Dependent Claim
37 words
The structure set forth in claim 2, inlcuding: said failsafe fatigue limit being less than the fatigue limit for said member whereby said warning means moves to Said warning position prior to fatigue failure of said member.
Claim 5
Dependent Claim
28 words
The structure set forth in claim 1, including: support means supporting said warning bar in position to prevent transfer of vibration from said shaft to said warning bar.
Claim 6
Dependent Claim
29 words
The structure set forth in claim 4, including: said support means including means releasing support of said warning bar upon releasing of said warning bar by said failsafe means.
Claim 7
Dependent Claim
17 words
The structure set forth in claim 1, wherein: said member is the arm of a utility pole.
Claim 8
Dependent Claim
14 words
The structure set forth in claim 1, including: said housing being U-shaped in configuration.
References Cited (Backward Citations)
US3020452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |