Patent US3621431A successfully refreshed from Google Patents.
US3621431A
Expired / Lapsed
US
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Blown-fuse indicator including a circuit-controlling switching device
Assignee: GOLUD INC A DE CORP
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Filing: 1969-12-23
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Granted: 1971-11-16
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Expires: 1989-12-23
Abstract
Abstract A unit including an indicating fuse and a switching device under the control of said indicating fuse is designed to be more compact and easier to manufacture than comparable prior art devices. This is achieved by providing a tubular member of insulating material mounted on one of the terminal caps of an indicating fuse, covering but one portion of the particular cap, and exposing another portion thereof, said tubular member of insulating material forming a support for a switching device which includes relatively movable contact means.
Inventors
- 👤 Paul C Hitchcock Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:12
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/30; H01H85/303; H01H85/306; H01H13/00; H01H13/02; H01H13/26; H01H13/28; H01H13/285
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A blown-fuse indicator and electric switch unit including a. a tubular casing of insulating material, a fusible restraining wire housed in said casing, a spring-biased indicator pin arranged adjacent one of the ends of said casing and normally restrained by said restraining wire, and a pair of terminal caps mounted on the axially outer ends of said casing and normally conductively interconnected by said restraining wire; b. a circuit-controlling switching device arranged adjacent said one of the ends of said casing and adjacent said indicator pin and operable by said indicator pin, said switching device including a pair of contacts for closing and opening an electric circuit; and c. a tubular member of insulating material frictionally mounted on one of said pair of terminal caps, said member of insulating material covering one portion of the lateral surface of one of said pair of terminal caps and exposing another portion of the lateral surface of said one of said pair of terminal caps, and said member of insulating material supporting said switching device and said pair of contacts thereof.
Claim 2
Dependent Claim
178 words
A blown-fuse indicator and electric switch unit including a. a tubular casing of insulating material, a fusible restraining wire housed in said casing, a spring-biased indicator pin arranged adjacent one of the ends of said casing and normally restrained by said restraining wire, and a pair of terminal caps mounted on the axially outer ends of said casing and normally conductively interconnected by said restraining wire; b. a circuit-controlling switching device arranged adjacent said one of the ends of said casing and adjacent said indicator pin and operable by said indicator pin, said switching device including a pair of contacts for closing and opening an electric circuit; and c. a tubular member of insulating material frictionally mounted on one of said pair of terminal caps, said member of insulating material covering one portion of the lateral surface of one of said pair of terminal caps and exposing another portion of the lateral surface of said one of said pair of terminal caps, and said member of insulating material supporting said switching device and said pair of contacts thereof.
Claim 3
Dependent Claim
52 words
A blown-fuse indicator as specified in claim 1 wherein the lateral surface of said member of insulating material is shorter than said lateral surface of said one of said pair of terminal caps and exposes the axially inner end of said lateral surface of said one of said pair of terminal caps.
Claim 4
Dependent Claim
18 words
A blown-fuse indicator as specified in claim 2 wherein said member of insulating material consists of an elastomer.
Claim 5
Dependent Claim
53 words
A blown-fuse indicator as specified in claim 1 wherein said member of insulating material is in the form of an additional cap and wherein said pair of contacts is arranged inside said additional cap and wherein terminal means for said pair of contacts are arranged on the lateral surface of said additional cap.
Claim 6
Dependent Claim
18 words
A blown-fuse indicator as specified in claim 1 wherein said tubular member of insulating material consists of nylon.
Claim 7
Dependent Claim
33 words
A blown-fuse indicator as specified in claim 3 wherein said tubular member of insulating material has a smaller inner diametEr than the outer diameter of said one of said pair of terminal caps.
Claim 8
Dependent Claim
227 words
A blown fuse indicator and electric switch unit including a. a tubular casing of insulating material, a fusible restraining wire housed in said casing, a spring-biased indicator pin arranged adjacent one of the ends of said casing and normally restrained by said restraining wire, and a pair of terminal caps mounted on the axially outer ends of said casing and normally conductively interconnected by said restraining wire; b. a circuit-controlling switching device arranged adjacent said indicator pin and adjacent one of said pair of terminal caps and operable by said indicator pin, said switching device including fixed contacts and movable contacts; c. a tubular member of insulating material frictionally mounted on said one of said pair of terminal caps, said member of insulating material covering one portion of the lateral surface of said one of said pair of terminal caps and exposing another portion of the lateral surface of said one of said pair of terminal caps, and said member of insulating material supporting parts of said switching device including the fixed contacts thereof; and d. a pair of contact clips, one of said pair of contact clips engaging the portion of the lateral surface of said one of said pair of terminal caps exposed by said tubular member, and the other of said pair of contact clips engaging the other of said pair of terminal caps.
Claim 9
Dependent Claim
227 words
A blown fuse indicator and electric switch unit including a. a tubular casing of insulating material, a fusible restraining wire housed in said casing, a spring-biased indicator pin arranged adjacent one of the ends of said casing and normally restrained by said restraining wire, and a pair of terminal caps mounted on the axially outer ends of said casing and normally conductively interconnected by said restraining wire; b. a circuit-controlling switching device arranged adjacent said indicator pin and adjacent one of said pair of terminal caps and operable by said indicator pin, said switching device including fixed contacts and movable contacts; c. a tubular member of insulating material frictionally mounted on said one of said pair of terminal caps, said member of insulating material covering one portion of the lateral surface of said one of said pair of terminal caps and exposing another portion of the lateral surface of said one of said pair of terminal caps, and said member of insulating material supporting parts of said switching device including the fixed contacts thereof; and d. a pair of contact clips, one of said pair of contact clips engaging the portion of the lateral surface of said one of said pair of terminal caps exposed by said tubular member, and the other of said pair of contact clips engaging the other of said pair of terminal caps.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |