US3668353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switches with external return springs
Assignee: Indak Manufacturing Corp
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Filing: 1970-05-21
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Granted: 1972-06-06
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Expires: 1990-05-21
Abstract
Abstract The present invention provides a new switch having a return spring which is mounted outside the casing in which the carriage and contactor are movable. An operating lever or other member extends into the casing to engage the carriage. Preferably, the spring is in the form of a torsion spring mounted on the pivot which supports the lever. In one embodiment, the spring has arms which extend into the casing through an opening therein, and then into a recess in the carriage. When the carriage is moved in opposite directions, it engages and moves the opposite arms of the spring. The opposite ends of the opening in the casing provide stops which are engageable with the arms to maintain initial stress in the spring. In another embodiment, the arms are engageable by tabs or other elements on the operating lever.
Inventors
- 👤 Andrew F Raab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:57
CPC Classifications
H; H01; H01H; H01H23/00; H01H23/02; H01H23/12; H01H23/16; H01H23/164; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20612
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
An electrical switch comprising a casing, a carriage movable in said casing, a supporting member connected to the outside of said casing, an operating member in the form of a lever having pivot means mounting said lever on said supporting member, said lever being movable relative to said casing and having an element extending into said casing and engageable with said carriage for moving said carriage, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, and a torsion spring disposed outside said casing and mounted along the axis of said pivot means, said torsion spring having first and second arms extending into said casing and engageable with said carriage for biasing said carriage against movement in opposite directions.
Claim 2
Dependent Claim
130 words
An electrical switch comprising a casing, a carriage movable in said casing, a supporting member connected to the outside of said casing, an operating member in the form of a lever having pivot means mounting said lever on said supporting member, said lever being movable relative to said casing and having an element extending into said casing and engageable with said carriage for moving said carriage, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, and a torsion spring disposed outside said casing and mounted along the axis of said pivot means, said torsion spring having first and second arms extending into said casing and engageable with said carriage for biasing said carriage against movement in opposite directions.
Claim 3
Dependent Claim
49 words
A switch according to claim 1, in which said casing is formed with an opening through which said arms extend into said casing, said casing having stop elements at the ends of said opening and engageable with said arms of said spring for maintaining initial stress in said spring.
Claim 4
Dependent Claim
113 words
An electrical switch, comprising a casing, a carriage movable in said casing, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, a supporting member connected to the outside of said casing, an operating lever extending into said casing for moving said carriage, pivot means connecting said lever to said supporting member, a spring mounted on said supporting member, and two connecting elements on said carriage and movable therewith and engageable with opposite end portions of said spring whereby said carriage is biased against movement in opposite directions, said casing having stop elements engageable with the opposite end portions of said spring.
Claim 5
Dependent Claim
113 words
An electrical switch, comprising a casing, a carriage movable in said casing, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, a supporting member connected to the outside of said casing, an operating lever extending into said casing for moving said carriage, pivot means connecting said lever to said supporting member, a spring mounted on said supporting member, and two connecting elements on said carriage and movable therewith and engageable with opposite end portions of said spring whereby said carriage is biased against movement in opposite directions, said casing having stop elements engageable with the opposite end portions of said spring.
Claim 6
Dependent Claim
112 words
An electrical switch, comprising a casing, a carriage movable in said casing, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, a supporting member connected to the outside of said casing, an operating lever extending into said casing for moving said carriage, pivot means connecting said lever to said supporting member, a torsion spring mounted along the axis of said pivot means and having two end portions in the form of arms, and two connecting elements on said carriage and movable therewith and engageable with said arms of said spring whereby said carriage is biased against movement in opposite directions.
Claim 7
Dependent Claim
112 words
An electrical switch, comprising a casing, a carriage movable in said casing, contactor means mounted on and movable with said carriage, contact means supported by said casing for engagement by said contactor means, a supporting member connected to the outside of said casing, an operating lever extending into said casing for moving said carriage, pivot means connecting said lever to said supporting member, a torsion spring mounted along the axis of said pivot means and having two end portions in the form of arms, and two connecting elements on said carriage and movable therewith and engageable with said arms of said spring whereby said carriage is biased against movement in opposite directions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |