US3601758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar electric socket
Assignee: Joel Olssons Elektriska AB
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Filing: 1969-06-09
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Granted: 1971-08-24
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Expires: 1989-06-09
Abstract
Abstract A bipolar electric socket of the type having, for protectional reasons, a spring-loaded shutter mounted in the space between the entrance holes and the underlying contact sleeves in such a manner that the shutter will be pressed away to uncover the sleeves only when two pins or the like-corresponding to the plug pins-are inserted simultaneously in said holes. One end of the shutter is freely supported by an upwards-sloping surface terminating beyond the holes, and the other end is spring loaded to maintain the shutter pressed against the underside of the holes and in engagement with a blocking shoulder. The insertion of the two pins of an attachment plug will first release the shutter from the shoulder and then push the shutter down the sloping surface, against the spring action, to uncover the entrance holes and the sleeves.
Inventors
- 👤 Tage Arnold Davidsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/44; H01R13/447; H01R13/453; H01R13/4534
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
227 words
A bipolar electric socket comprising a casing having a top portion and a bottom portion spaced therefrom and substantially parallel thereto, each having aligned openings therein, spaced contact members within said casing below said bottom portion and aligned with said openings, a fixed inclined guide surface in the space between said top and bottom portions, adjacent said openings, a shutter having a plane upper surface in sliding contact with the lower face of said top portion, said shutter spanning said openings and closing access to said contact members, means yieldably urging one end of said shutter into engagement with said inclined surface whereby said shutter is urged upwardly along said incline into tight engagement with the lower face of said top portion, and means locking said shutter against sliding movement with respect to said top portion until said shutter is depressed against said inclined surface in a position substantially parallel to the plane of said top portion, and whereby upon the insertion of the prongs of a male attachment plug into said openings, said shutter is depressed in a position substantially parallel to the plane of said top member sufficiently to release said shutter from said locking means, whereupon said shutter is urged against said inclined surface and moved against the force of said yieldable means to expose said contact members for connection with said attachment plug.
Claim 2
Dependent Claim
227 words
A bipolar electric socket comprising a casing having a top portion and a bottom portion spaced therefrom and substantially parallel thereto, each having aligned openings therein, spaced contact members within said casing below said bottom portion and aligned with said openings, a fixed inclined guide surface in the space between said top and bottom portions, adjacent said openings, a shutter having a plane upper surface in sliding contact with the lower face of said top portion, said shutter spanning said openings and closing access to said contact members, means yieldably urging one end of said shutter into engagement with said inclined surface whereby said shutter is urged upwardly along said incline into tight engagement with the lower face of said top portion, and means locking said shutter against sliding movement with respect to said top portion until said shutter is depressed against said inclined surface in a position substantially parallel to the plane of said top portion, and whereby upon the insertion of the prongs of a male attachment plug into said openings, said shutter is depressed in a position substantially parallel to the plane of said top member sufficiently to release said shutter from said locking means, whereupon said shutter is urged against said inclined surface and moved against the force of said yieldable means to expose said contact members for connection with said attachment plug.
Claim 3
Dependent Claim
16 words
A socket according to claim 1 in which said inclined surface is integral with the casing.
Claim 4
Dependent Claim
33 words
A socket according to claim 1, in which said inclined surface has a width substantially less than that of said shutter and is placed substantially midway between the lateral edges of said shutter.
Claim 5
Dependent Claim
29 words
A socket according to claim 1 in which said locking means comprises interengaging means on said top portion of the casing and the adjacent meeting surface of said shutter.
Claim 6
Dependent Claim
27 words
A socket according to claim 4 in which said interengaging means comprises complementary notches and grooves on the respeCtive marginal edge portions of said top ans shutter.
Claim 7
Dependent Claim
14 words
A socket according to claim 1 in which the yielding means comprises a spring.
Claim 8
Dependent Claim
111 words
A socket according to claim 1, wherein the bottom of the casing has a shoulder facing said inclined surface, with the bottom edge of said shutter opposite said surface resting against said shoulder when said openings are closed by said shutter, and wherein said shutter has a curved upper surface in extension of said plane surface, whereby upon the insertion of the prongs of a male attachment plug into said socket, said shutter will be caused; to rock about the juncture of said plane and curved surfaces, to lift its said bottom edge out of locking engagement with said shoulder, and to be moved down said inclined surface and rearwardly thereof.
Claim 9
Dependent Claim
124 words
A socket according to claim 1 wherein said shutter has an opening alignable with one of said top openings, and said casing has at least one stop member opposite said inclined surface holding said shutter in nonoperative position when said shutter opening is nonaligned with its corresponding top opening, and yieldable means urging said shutter into tight engagement with said top portion, whereby, upon insertion of the prongs of a male attachment plug into said top openings, said shutter is depressed and displaced from engagement with said stop member and is caused to move along said inclined surface to bring said shutter opening into alignment with its said corresponding top opening and expose said contact members for connection with the prongs of said plug.
Claim 10
Dependent Claim
40 words
A socket according to claim 8, wherein said inclined surface comprises separate inclined planes disposed at opposite sides within said casing and said shutter comprises a plane T-shaped member having the arms of the T resting on said inclined surfaces.
Claim 11
Dependent Claim
31 words
A socket according to claim 1 in which additional means is disposed between said shutter and said bottom portion to maintain said shutter in tight yielding abutment with said top portion.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |