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Locking plug
| Details |
Inventors: D'Amato, Michael J.; Jaconette, Frank C.;
Assignee: Harvey Hubbell, Incorporated (Orange, CT)
Primary Examiner: Goldberg; Howard N.
Assistant Examiner: Desmond; Eugene F.
Attorney, Agent or Firm:
The male portion of a connector assembly of the locking type has blades insertable into slots in the mating female portion, the male portion then being rotatable to lock the blades against direct axial extraction. A spring urged locking pin adjacent the trailing edge of at least one blade normally protrudes from the connector face, is pushed in by the female face, and then protrudes after locking rotation, entering the slot portion vacated by the trailing edge. A rotatable sleeve on the male connector body has a cam surface which, upon rotation of the sleeve in the unlocking direction, first retracts the locking pin, then engages the body of the connector to rotate the blades out of their locked position. |
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DETAILED DESCRIPTION OF THE DRAWINGS Referring now to FIGS.
1, 2 and 3, it will be seen that the male electrical plug member indicated generally at 10 includes a cylindrical sleeve 11 which surrounds a generally cylindrical insulating body 12 having two portions, one portion being an interior tubular member 13 and a disc-like end member 14 having a front face through which blades 15, 16 and 17 protrude.
Portions 13 and 14 are fixedly attached to each other, in a conventional fashion, by screws 18 which pass through portion 14 and threadedly engage bosses within tubular portion 13, which will be further described.
A portion of a mating female receptacle 20 is shown in FIG.
1, the receptacle having slots to receive the three blades.
One such slot 21 is illustrated, the slot having an entrance portion behind which is a larger recess 22 into which a lateral protrusion 16a on blade 16 is received after the blade has been fully inserted and rotated.
At the opposite end of the connector assembly from the blades is a clamping device indicated generally at 23 for permitting an electrical cable to pass into the interior of the connector and for firmly clamping the cable.
This clamping mechanism can take several forms but, in the form illustrated, the clamp has two halves, one of which is generally semi-circular in cross-section and is formed as an extension of body portion 13.
The other portion is a similar semi-circular member which is attachable to the first by screws 24, each portion having a circular indentation to engage approximately half of the cable.
Of particular relevance to the present invention is the provision of a locking pin 25 which protrudes from the front face of body portion 14 and extends therethrough.
It will be observed that pin 25 is directly adjacent the trailing edge of blade 16, that it passes through body 14, and that it is axially movable in body 14 relative to that body and blade 16.
As will be further described, pin 25 is generally L-shaped and the other end of the L forms an operating member 26 which protrudes radially through an axially extending slot 27 in body 14
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