US3676625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual plunger actuated sealed combination safety and interlock switch mechanism
Assignee: Individual
•
Filing: 1971-04-09
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Granted: 1972-07-11
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Expires: 1991-04-09
Abstract
Abstract A pair of plunger actuated switches which are disposed in one portion of a sealed housing and the terminal connections for the switches are disposed in another portion of the sealed housing separate from the first portion. The switches are selectively actuatable by a pair of opposite co-axial aligned plungers which extend into the switch body portion of the housing; the plungers are oppositely biased outwardly and are interconnected by a slidable rod whose ends are inserted within both of the plungers in such fashion that, when one plunger is depressed the opposite plunger is locked against actuation; the inner ends of both plungers are chamfered and in contact with rollers on the switch actuation levers so that when either plunger is depressed the switch actuator roller rides up on the chamfered end of the plunger to close switch contacts within each of the switches; the terminal strip in the terminal body portion of the housing is provided with a plurality of terminals; the terminal strip can be independently removed from the housing for rewiring or replacement without disturbing the arrangement in the plunger body portion of the housing.
Inventors
- 👤 Leland F Blatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:17
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/14; H01H13/18; H01H13/04; H01H13/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
305 words
A switch and switch actuating assembly adapted for actuation by a movable member; said switch assembly comprising a housing defining a first body portion and a second body portion removably attached thereto; said second body portion being provided with a cover; first and second switch units mounted on said second body portion for extension into said first body portion in substantial alignment with each other; said first and second switch units each having a depressible contact button extending outwardly therefrom; first and second switch actuator assemblies supported in said first body portion in reverse position to each other and each including a switch actuating lever pivotally attached at one end within said first body portion and in contact with said switch contact buttons of said first and second switch units; roller means mounted on the other ends of each of said switch actuating lever; first and second plunger means reciprocably supported in said first body portion in opposite axially aligned position to each other and each having a portion extending inwardly of said first body portion and a portion extending outwardly from said first body portion; said inwardly extending portion of said first and second plunger means having a tapered end for engagement with said roller means of said switch actuating levers; means cooperatively connecting said first plunger means to said second plunger means comprising a rod retained within said first plunger means for extension outwardly therefrom and axially into said second plunger means so that, upon depression of said first plunger means, said rod will be moved a predetermined distance further into said second plunger means into engagement against an internal abutment thereof; means retaining said rod in fixed position within said first plunger means; and resilient bias means to normally force said plunger means in opposite direction outwardly of said first body portion.
Claim 2
Dependent Claim
305 words
A switch and switch actuating assembly adapted for actuation by a movable member; said switch assembly comprising a housing defining a first body portion and a second body portion removably attached thereto; said second body portion being provided with a cover; first and second switch units mounted on said second body portion for extension into said first body portion in substantial alignment with each other; said first and second switch units each having a depressible contact button extending outwardly therefrom; first and second switch actuator assemblies supported in said first body portion in reverse position to each other and each including a switch actuating lever pivotally attached at one end within said first body portion and in contact with said switch contact buttons of said first and second switch units; roller means mounted on the other ends of each of said switch actuating lever; first and second plunger means reciprocably supported in said first body portion in opposite axially aligned position to each other and each having a portion extending inwardly of said first body portion and a portion extending outwardly from said first body portion; said inwardly extending portion of said first and second plunger means having a tapered end for engagement with said roller means of said switch actuating levers; means cooperatively connecting said first plunger means to said second plunger means comprising a rod retained within said first plunger means for extension outwardly therefrom and axially into said second plunger means so that, upon depression of said first plunger means, said rod will be moved a predetermined distance further into said second plunger means into engagement against an internal abutment thereof; means retaining said rod in fixed position within said first plunger means; and resilient bias means to normally force said plunger means in opposite direction outwardly of said first body portion.
Claim 3
Dependent Claim
113 words
In the switch and switch actuating assembly as defined in claim 1, said second body portion being provided with means to mount a terminal plate; said terminal plate having a plurality of connector means for electrical connection with said first and second switch units and a plurality of terminals; means on said second body portion for mounting of electrical equipment thereto adapted for connection to said terminals of said terminal plate; said second body portion mounting said first and second switch units and said terminal plate being mounted such upon said second body portion as to be independently removable therefrom without disturbing the arrangement of said switch actuator assemblies and said plunger means.
Claim 4
Dependent Claim
39 words
In the switch and switch actuator assembly as defined in claim 2, first gasket means disposed between said first and said second body portions at the interface thereof to seal said switch housing against entrance of moisture and dirt.
Claim 5
Dependent Claim
28 words
In the switch and switch actuator assembly as defined in claim 3, second gasket means disposed between said cover and sAid second body portion at the interface thereof.
Claim 6
Dependent Claim
37 words
In the switch and switch actuating assembly as defined in claim 1, said resilient bias means comprising an expansion coil spring surrounding said rod, the opposite ends thereof being supported within said first and second plunger means.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |