US4904829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Actuator-controlled keylock switch
Assignee: Telemecanique SA
•
Filing: 1988-03-25
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Granted: 1990-02-27
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Expires: 2008-03-25
Abstract
Abstract A key attached, for example, to the door of an electrical equipment cubicle is capable of sliding within a passageway so as to cause pivotal displacement of a cam and upward displacement of a push-rod, thus releasing a switch lug. A locking rod forming part of a slide-block which is coupled with the push-rod is capable of moving between a locking position in which an annular channel permits displacement of the key and an unlocking position in which the locking rod is engaged within a key notch. One end of the slide-block projects from the top face of the switching unit head in order to be downwardly displaced by an actuator, whereupon the key can be withdrawn without difficulty or danger.
Inventors
- 👤 Denis Berthaud
- 👤 Andre Vergez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:02
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/08; H; H01; H01H; H01H27/00; H01H27/002; H01H27/007; H01H3/00; H01H3/32; H01H3/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
A keylock safety switching unit, comprising a key selectively insertable within a key-receiving assembly, said assembly comprising: at least one switch provided with a control member movable between two control positions corresponding to two conditions of the switch; a movable component mounted within said assembly and displaceable by said key between an inserted-key position and a withdrawn-key position; a transmission member mounted operatively between said movable component and said control member of said switch for displacing said control member between the two control positions thereof; a locking member connected to said transmission member for displacement therewith, said locking member being in a key-locking position when said transmission member is in a position allowed by the movable component when said movable component is in the inserted-key position, and said locking member being in a key-release position when said movable component is in the withdrawn-key position; and means for selectively urging said locking member to the key release position when said movable component is in the inserted-key position.
Claim 2
Dependent Claim
166 words
A keylock safety switching unit, comprising a key selectively insertable within a key-receiving assembly, said assembly comprising: at least one switch provided with a control member movable between two control positions corresponding to two conditions of the switch; a movable component mounted within said assembly and displaceable by said key between an inserted-key position and a withdrawn-key position; a transmission member mounted operatively between said movable component and said control member of said switch for displacing said control member between the two control positions thereof; a locking member connected to said transmission member for displacement therewith, said locking member being in a key-locking position when said transmission member is in a position allowed by the movable component when said movable component is in the inserted-key position, and said locking member being in a key-release position when said movable component is in the withdrawn-key position; and means for selectively urging said locking member to the key release position when said movable component is in the inserted-key position.
Claim 3
Dependent Claim
22 words
A keylock safety switching unit according to claim 1 wherein the locking member and the transmission member are slidable along parallel axes.
Claim 4
Dependent Claim
65 words
A keylock safety switching unit according to claim 1, wherein the locking member is carried by a slide-block provided with a recess which registers with a path of travel of the key when the locking member is in the key release position, said slide-block projecting into a notch of the key when the key is inserted and the locking member is in the key-locking position.
Claim 5
Dependent Claim
21 words
A keylock safety switching unit according to claim 3, wherein said notch is provided in a side edge of said key.
Claim 6
Dependent Claim
70 words
A keylock safety switching unit in accordance with claim 1 wherein a coupling portion of the locking member and of the transmission member is provided with lug facing a cam surface of the movable component in a region which is inaccessible through a key hole opening of the key-receiving assembly, said locking member being subjected to the action of resilient means biasing the lug into contact with the cam surface.
Claim 7
Dependent Claim
39 words
A keylock safety switching unit in accordance with claim 1, wherein the means for selectively urging said locking member comprises an end of said locking member accessible from outside through an aperture in housing means of said key-receiving assembly.
Claim 8
Dependent Claim
32 words
A keylock safety switching unit in accordance with claim 1, wherein the means for selectively urging the locking member comprises an ancillary actuating device secured to housing means of the key-receiving assembly.
Claim 9
Dependent Claim
48 words
A keylock safety switching unit in accordance with claim 7, wherein the key-receiving unit comprises a casing accommodating said switching and a head accommodating said movable component, said ancillary actuating device is secured to an accessible surface of said head, and screws securing the head to the casing.
Claim 10
Dependent Claim
26 words
A keylock switching unit in accordance with claim 8, wherein screws securing the ancillary actuating device to the head also secure the head to the casing.
Claim 11
Dependent Claim
54 words
A keylock safety switching unit in accordance with claim 8, wherein the ancillary actuating device is selectively orientable with respect to the casing and has a transverse cross-section which is inscribed within a contour of said surface of said head in any operative orientation of the ancillary actuating device with respect to the casing.
Claim 12
Dependent Claim
56 words
A keylock safety switching unit in accordance with claim 7, comprising an auxiliary contact casing provided with an operating member extending there across, said auxiliary contact casing being mounted between the keyreceiving assembly and the ancillary actuating device with said operating member acting as a transmission means between the ancillary actuating device and the locking member.
Claim 13
Dependent Claim
47 words
A keylock safety switching unit in accordance with claim 7, wherein the ancillary actuating device is selected from the group consisting of devices which are sensitive to an electric parameter, devices which are sensitive to a pneumatic parameter and devices which are sensitive to a thermal parameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |