Patent US4501940A successfully refreshed from Google Patents.
US4501940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opposed contact switch
Assignee: Tokai Rika Co Ltd
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Filing: 1983-10-17
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Granted: 1985-02-26
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Expires: 2003-10-17
Abstract
Abstract An opposed contact switch comprising two stationary contacts 8, a movable contact 13 that can bridge the stationary contacts when moved vertically into contact, a spring 15 normally holding the contacts together, a control rod 10 movable vertically, and a contact holder 11 connected to said control rod with oblique guide grooves 12 in the side thereof into which are fitted knobs 14 on the side of the movable contact, whereby the movable contact slides laterally for a short distance across the stationary contact before breaking contact.
Inventors
- 👤 Masaru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:24
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H1/00; H01H1/12; H01H1/14; H01H1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
An opposed contact switch, comprising: two stationary contacts, a movable contact for contacting and electrically interconnecting said two stationary contacts, first spring biasing means for biasing said movable contact into a first vertical position in contact with said two stationary contacts, said biasing means consisting of a contact spring directly in contact with said movable contact, said movable contact having engaging knobs protruding therefrom, a contact holder having vertically extending sides with guides therein inclined with respect to the vertical, said engaging knobs slidably fitting into said guides, and plunger means for moving said contact holder vertically through a first portion of a stroke to cause said guides and engaging knobs to move said movable contact laterally across, but still in contact with said stationary contacts, and through a second portion of a stroke to cause said movable contact to move vertically away from the first position to a second vertical position out of contact with said stationary contacts, and release of said plunger means results in the opposite sequence of movement of said movable contact.
Claim 2
Dependent Claim
176 words
An opposed contact switch, comprising: two stationary contacts, a movable contact for contacting and electrically interconnecting said two stationary contacts, first spring biasing means for biasing said movable contact into a first vertical position in contact with said two stationary contacts, said biasing means consisting of a contact spring directly in contact with said movable contact, said movable contact having engaging knobs protruding therefrom, a contact holder having vertically extending sides with guides therein inclined with respect to the vertical, said engaging knobs slidably fitting into said guides, and plunger means for moving said contact holder vertically through a first portion of a stroke to cause said guides and engaging knobs to move said movable contact laterally across, but still in contact with said stationary contacts, and through a second portion of a stroke to cause said movable contact to move vertically away from the first position to a second vertical position out of contact with said stationary contacts, and release of said plunger means results in the opposite sequence of movement of said movable contact.
Claim 3
Dependent Claim
172 words
An opposed contact switch, comprising: two stationary contacts, a movable contact for contacting and electrically interconnecting said two stationary contacts, first spring biasing means for biasing said movable contact into a first vertical position in contact with said two stationary contacts, said biasing means consisting of a contact spring directly in contact with said movable contact, said movable contact having grooves therein, a contact holder having vertically extending sides with protrusions thereon inclined with respect to the vertical, said protrusions slidably fitting into said grooves, and plunger means for moving said contact holder vertically through a first portion of a stroke to cause said grooves and protrusions to move said movable contact laterally across, but still in contact with, said stationary contacts, and through a second portion of a stroke to cause said movable contact to move vertically away from the first position to a second vertical position out of contact with said stationary contacts, and release of said plunger means results in the opposite sequence of movement of said movable contact.
Claim 4
Dependent Claim
172 words
An opposed contact switch, comprising: two stationary contacts, a movable contact for contacting and electrically interconnecting said two stationary contacts, first spring biasing means for biasing said movable contact into a first vertical position in contact with said two stationary contacts, said biasing means consisting of a contact spring directly in contact with said movable contact, said movable contact having grooves therein, a contact holder having vertically extending sides with protrusions thereon inclined with respect to the vertical, said protrusions slidably fitting into said grooves, and plunger means for moving said contact holder vertically through a first portion of a stroke to cause said grooves and protrusions to move said movable contact laterally across, but still in contact with, said stationary contacts, and through a second portion of a stroke to cause said movable contact to move vertically away from the first position to a second vertical position out of contact with said stationary contacts, and release of said plunger means results in the opposite sequence of movement of said movable contact.
References Cited (Backward Citations)
US2583139A
Cited
US3099734A
Cited
US3539749A
Cited
US3586810A
Cited
US3624332A
Cited
US4053726A
Cited
JPS5611698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |