US3560677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlock bar for mementary selector switch
Assignee: Cutler Hammer Inc
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Filing: 1969-08-19
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Granted: 1971-02-02
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Expires: 1989-08-19
Abstract
Abstract The outer buttons of a three-position, center-off switch are interlocked by an interlock bar pivotally mounted to the movable contact under the center button. The opposite ends of the bar underlie the outer buttons wherein depression of both outer buttons drive the bar downward to open the center contact before both outer contacts will close.
Inventors
- 👤 Arthur F Kolb
- 👤 Robert O Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:09
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; H01H13/74
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A pushbutton selector switch and interlocking means therefor comprising, in combination: a pair of normally open contact sets; a pair of pushbuttons each individually depressible to operate a respective one of said pair of normally open contact sets to a closed condition; a normally closed contact set; means electrically connecting said pair of normally open contact sets to an electrical supply source through said normally closed contact set; a rigid member pivotally mounted upon said normally closed contact set and extending under each of said pair of pushbuttons; and wherein depression of one of said pair of pushbuttons to operate a respective one of said pair of normally open contact sets pivots said rigid member about its connection to said normally closed contact set and the subsequent depression of the other of said pair of pushbuttons while said first mentioned pushbutton remains depressed pivots said rigid member about its point of engagement with said first mentioned pushbutton to effect an opening operation of said normally closed contact set through the pivotal connection between said rigid member and said normally closed contact set.
Claim 2
Dependent Claim
182 words
A pushbutton selector switch and interlocking means therefor comprising, in combination: a pair of normally open contact sets; a pair of pushbuttons each individually depressible to operate a respective one of said pair of normally open contact sets to a closed condition; a normally closed contact set; means electrically connecting said pair of normally open contact sets to an electrical supply source through said normally closed contact set; a rigid member pivotally mounted upon said normally closed contact set and extending under each of said pair of pushbuttons; and wherein depression of one of said pair of pushbuttons to operate a respective one of said pair of normally open contact sets pivots said rigid member about its connection to said normally closed contact set and the subsequent depression of the other of said pair of pushbuttons while said first mentioned pushbutton remains depressed pivots said rigid member about its point of engagement with said first mentioned pushbutton to effect an opening operation of said normally closed contact set through the pivotal connection between said rigid member and said normally closed contact set.
Claim 3
Dependent Claim
29 words
The combination according to claim 1 together with a third pushbutton depressible to operate said normally closed contact set to an open condition thereof independently of said rigid member.
Claim 4
Dependent Claim
212 words
A momentary pushbutton selector switch comprising, in combination: an insulating housing; a pair of pushbuttons mounted within said housing and biased outwardly thereof; a pair of normally open contact sets each positioned adjacent a respective one of said pair of pushbuttons, said normally open contact sets being individually operable to a closed condition thereof upon depression of the respective one of said pair of pushbuttons; a third pushbutton located between said pair of pushbuttons and biased outwardly of said housing; a normally closed contact set positioned adjacent said third pushbutton and being operable to an open condition thereof upon depression of said third pushbutton; an interlock member having a pivotal connection to the movable contact of said normally closed contact set, said interlock member extending in opposite directions within said housing to underlie each of said pair of pushbuttons; and wherein depression of one of said pair of pushbuttons pivots said interlock member about said pivotal connection and subsequent depression of the other of said pair of pushbuttons while the first depressed pushbutton remains depressed pivots said intErlock member about its point of engagement with said first depressed pushbutton to effect opening of said normally closed contact set before the other normally open contact set is closed by the other bush pushbutton.
Claim 5
Dependent Claim
212 words
A momentary pushbutton selector switch comprising, in combination: an insulating housing; a pair of pushbuttons mounted within said housing and biased outwardly thereof; a pair of normally open contact sets each positioned adjacent a respective one of said pair of pushbuttons, said normally open contact sets being individually operable to a closed condition thereof upon depression of the respective one of said pair of pushbuttons; a third pushbutton located between said pair of pushbuttons and biased outwardly of said housing; a normally closed contact set positioned adjacent said third pushbutton and being operable to an open condition thereof upon depression of said third pushbutton; an interlock member having a pivotal connection to the movable contact of said normally closed contact set, said interlock member extending in opposite directions within said housing to underlie each of said pair of pushbuttons; and wherein depression of one of said pair of pushbuttons pivots said interlock member about said pivotal connection and subsequent depression of the other of said pair of pushbuttons while the first depressed pushbutton remains depressed pivots said intErlock member about its point of engagement with said first depressed pushbutton to effect opening of said normally closed contact set before the other normally open contact set is closed by the other bush pushbutton.
References Cited (Backward Citations)
US2624809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |