US3866196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blown fuse indicator for rotating equipment
Assignee: Westinghouse Electric Corp
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Filing: 1973-08-01
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Granted: 1975-02-11
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Expires: 1993-08-01
Abstract
Abstract A blown fuse indicator for rotating equipment, such as a rotating rectifier assembly, in which a fuse is mounted on an internal surface of a support wheel where it is not visible during operation. An opening is provided through the support wheel structure in alignment with the fuse, and radially movable indicator element or projectile is provided in the fuse which is normally held against movement but which is released when the fuse blows and permitted to move outward through the opening to a position where it can be observed, as by the use of stroboscopic light. Means are provided in the opening for limiting outward movement of the indicator so that it cannot be thrown out of the equipment.
Inventors
- 👤 August C Mann
- 👤 Thayer L Dillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/30; H01H85/303
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
In a rotating rectifier assembly including a rotatable support wheel having a plurality of rectifier circuit components mounted on a cylindrical rim thereof, a fuse mounted on the inner surface of said rim, the rim having an opening therethrough in alignment with the fuse, an indicator member disposed at one end of the fuse adjacent said opening, means for normally retaining said indicator member in position and for releasing the indicator member upon blowing of the fuse to permit the indicator member to move outward into the opening, and means for engaging the indicator member to limit its outward movement.
Claim 2
Dependent Claim
100 words
In a rotating rectifier assembly including a rotatable support wheel having a plurality of rectifier circuit components mounted on a cylindrical rim thereof, a fuse mounted on the inner surface of said rim, the rim having an opening therethrough in alignment with the fuse, an indicator member disposed at one end of the fuse adjacent said opening, means for normally retaining said indicator member in position and for releasing the indicator member upon blowing of the fuse to permit the indicator member to move outward into the opening, and means for engaging the indicator member to limit its outward movement.
Claim 3
Dependent Claim
30 words
The combination defined in claim 1 in which said last-mentioned means comprises a metal wire attached to the indicator member and adapted to be ruptured upon blowing of the fuse.
Claim 4
Dependent Claim
40 words
The combination defined in claim 1 in which the outer end of the opening is of reduced diameter relative to the remainder of the opening and the indicator member is shaped to engage said reduced diameter end of the opening.
Claim 5
Dependent Claim
25 words
The combination of claim 3 and including a membrane covering the outer end of the opening and adapted to be punctured by the indicator member.
Claim 6
Dependent Claim
57 words
The combination of claim 1 in which the fuse includes a housing portion extending into said opening, the indicator member being disposed in said housing, the housing having an open end to permit outward movement of the indicator member therethrough, and the housing and indicator member having interengaging portions to limit outward movement of the indicator member.
Claim 7
Dependent Claim
20 words
The combination of claim 5 and including spring means in the housing biasing the indicator member in the outward direction.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |