US3578932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversibly mountable limit switch construction
Assignee: Robertshaw Controls Co
•
Filing: 1968-06-17
•
Granted: 1971-05-18
•
Expires: 1988-06-17
Abstract
Abstract This application discloses a limit switch having a cup-shaped switch-supporting casing with an open rim, and a cup-shaped switch cover casing with an open rim. Either of these casings may be mounted on a support wall with its rim exposed. Then the other casing may cover the supported casing, rim to rim, to form a combined closed casing. The switch-supporting casing has an operator head at the top and a powerline-receiving notch at the bottom. The switch cover casing has a powerline-receiving notch at the bottom. Prong receptacle means may be added to the switch cover casing so that the powerline terminals may be attached thereto and prongs may be added to the switch support casing, when the switch cover casing is attached to the support wall as a plug-in installation.
Inventors
- 👤 Ronald W Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/0006; H01H21/00; H01H21/02; H01H21/18; H01H21/22; H01H21/24; H01H21/28; H01H2021/287
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
182 words
In combination: a combined cup-shaped surface mount and cover-forming switch support casing having an opening forming switch support casing rim, and having a powerline conduit fitting receiving switch support casing notch; insulated switch means mounted in said switch support casing and having switch support casing powerline terminal fasteners manipulatable through said switch support casing rim; an operator head selectively rotatably mounted on said switch support casing selectively to adjust said switch means; a combined cup-shaped surface mount and cover-forming switch cover casing having a switch cover casing rim engaging said switch support casing rim, and having a powerline conduit fitting receiving switch cover casing notch mating with said switch support casing notch; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to said switch support casing to be adapted to secure a powerline conduit to said switch support casing; said switch support casing having mounting means adapted to secure said switch support casing to a support surface and having covering fastening means securing said switch cover casing to said switch support casing.
Claim 2
Dependent Claim
182 words
In combination: a combined cup-shaped surface mount and cover-forming switch support casing having an opening forming switch support casing rim, and having a powerline conduit fitting receiving switch support casing notch; insulated switch means mounted in said switch support casing and having switch support casing powerline terminal fasteners manipulatable through said switch support casing rim; an operator head selectively rotatably mounted on said switch support casing selectively to adjust said switch means; a combined cup-shaped surface mount and cover-forming switch cover casing having a switch cover casing rim engaging said switch support casing rim, and having a powerline conduit fitting receiving switch cover casing notch mating with said switch support casing notch; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to said switch support casing to be adapted to secure a powerline conduit to said switch support casing; said switch support casing having mounting means adapted to secure said switch support casing to a support surface and having covering fastening means securing said switch cover casing to said switch support casing.
Claim 3
Dependent Claim
162 words
In combination: a combined surface mount and cover-forming switch support member adapted to be mounted on a supporting surface; a combined surface mount and cover-forming switch cover member adapted to be mounted on a supporting surface; said switch support member having a powerline conduit receiving fitting switch support member notch means; insulated switch means mounted on said switch support member; an operator head selectively rotatably mounted on said switch support member selectively to adjust said switch means; said switch cover member having means covering said switch means and having a powerline conduit receiving fitting switch cover member notch means mating with said switch support member notch means; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to one of said switch support member and said switch cover member to be adapted to secure a powerline conduit to said one switch member; and securing said switch support member to said switch cover member.
Claim 4
Dependent Claim
162 words
In combination: a combined surface mount and cover-forming switch support member adapted to be mounted on a supporting surface; a combined surface mount and cover-forming switch cover member adapted to be mounted on a supporting surface; said switch support member having a powerline conduit receiving fitting switch support member notch means; insulated switch means mounted on said switch support member; an operator head selectively rotatably mounted on said switch support member selectively to adjust said switch means; said switch cover member having means covering said switch means and having a powerline conduit receiving fitting switch cover member notch means mating with said switch support member notch means; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to one of said switch support member and said switch cover member to be adapted to secure a powerline conduit to said one switch member; and securing said switch support member to said switch cover member.
Claim 5
Dependent Claim
38 words
A combination according to claim 1 in which said fitting detachable attaching means includes a boss on said fitting and a screw on said boss threaded into a threaded opening in a boss on said switch support casing.
Claim 6
Dependent Claim
213 words
In combination: a combined cup-shaped surface mount and cover forming switch support casing having an opening forming switch support casing rim, and having a powerline conduit fitting receiving switch support casing notch; insulated switch means mounted in said switch support casing and having prong means; an operator head selectively rotatably mounted on said switch support casing selectively to adjust said switch means; a combined cup-shaped surface mount and cover-forming switch cover casing having a switch cover casing rim engaging said switch support casing rim, and having a powerline conduit fitting receiving switch cover casing notch mating with said switch support casing notch; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to said switch cover casing to be adapted to secure a powerline conduit to said switch cover casing; prong receptacle means interconnected to said switch prongs and attached to said switch cover casing, said prong receptacle means having powerline terminal fasteners adapted to connect said prong receptacle means to powerline terminals of powerlines passing through said fitting; said switch cover casing having fastening means securing said switch cover casing to said switch support casing, said switch cover casing having mounting means adapted to secure said switch cover casing to a support surface.
Claim 7
Dependent Claim
213 words
In combination: a combined cup-shaped surface mount and cover forming switch support casing having an opening forming switch support casing rim, and having a powerline conduit fitting receiving switch support casing notch; insulated switch means mounted in said switch support casing and having prong means; an operator head selectively rotatably mounted on said switch support casing selectively to adjust said switch means; a combined cup-shaped surface mount and cover-forming switch cover casing having a switch cover casing rim engaging said switch support casing rim, and having a powerline conduit fitting receiving switch cover casing notch mating with said switch support casing notch; a powerline conduit receiving fitting disposed in said mating notches and having detachable attaching means detachably securing said fitting to said switch cover casing to be adapted to secure a powerline conduit to said switch cover casing; prong receptacle means interconnected to said switch prongs and attached to said switch cover casing, said prong receptacle means having powerline terminal fasteners adapted to connect said prong receptacle means to powerline terminals of powerlines passing through said fitting; said switch cover casing having fastening means securing said switch cover casing to said switch support casing, said switch cover casing having mounting means adapted to secure said switch cover casing to a support surface.
Claim 8
Dependent Claim
76 words
A combination according to claim 21 in which said prong receptacle means includes an insulative plastic box with detachable attaching means attaching said box to said switch cover casing, said box having individual prong-receiving forks carried by and conductively connected by fork support members with internally threaded screw-receiving sockets embedded in said plastic box, and in which said powerline terminal fasteners of said prong receptacle means are terminal fastener screws threadedly received in said screw-receiving sockets.
Claim 9
Dependent Claim
29 words
A combination according to claim 22 in which said detachable attaching means for said box includes screws and screw holes in said box and in said switch cover casing.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |