Locking plug
First Claim
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1. An electrical receptacle for use with a conventional electrical plug having blade-type contacts with an opening at their outer portions, comprising:
- a casing including a first segment and a second segment detachably secured together, said segments defining an interior cavity;
fastening means in said cavity to connect the wires of an electrical cord;
said first segment having an end face;
at least wo spaced apertures provided in said end face and communicating with a pair of channels in said cavity;
a pair of semi-rigid electrically-conductive strips disposed longitudinally in said cavity, each located adjacent one of said channels and longitudinally spaced from said end face;
each strip being electrically connected to one of said fastening means and adapted to frictionally contact the associated blade contact of said plug;
a lock element disposed between the two said channels made of resilient, non-conductive material;
said lock element having a lock means adapted to releasably lock into said opening of each said blade contact;
further having an externally-operable release means to release the lock means, whereby said plug can be lockingly engaged and disengaged from the receptacle without any possibility of electric shock.
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Accused Products
Abstract
An electrical receptacle consisting of a casing having a lock part to releasably lock a mating electrical plug of the blade contact type, is disclosed. The lock part is a separate piece made of electric insulating material and manually-operable release buttons externally of the casing. The lock part ensures an effective locking of the plug and eliminates any possibility of electric shock to a user while inserting or removing the plug contacts.
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Citations
8 Claims
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1. An electrical receptacle for use with a conventional electrical plug having blade-type contacts with an opening at their outer portions, comprising:
- a casing including a first segment and a second segment detachably secured together, said segments defining an interior cavity;
fastening means in said cavity to connect the wires of an electrical cord;
said first segment having an end face;
at least wo spaced apertures provided in said end face and communicating with a pair of channels in said cavity;
a pair of semi-rigid electrically-conductive strips disposed longitudinally in said cavity, each located adjacent one of said channels and longitudinally spaced from said end face;
each strip being electrically connected to one of said fastening means and adapted to frictionally contact the associated blade contact of said plug;
a lock element disposed between the two said channels made of resilient, non-conductive material;
said lock element having a lock means adapted to releasably lock into said opening of each said blade contact;
further having an externally-operable release means to release the lock means, whereby said plug can be lockingly engaged and disengaged from the receptacle without any possibility of electric shock. - View Dependent Claims (2, 3, 4)
- a casing including a first segment and a second segment detachably secured together, said segments defining an interior cavity;
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5. A duplex electrical receptacle for use with conventional electrical plugs, each having blade-type contact provided with an opening at their outer portions, comprising:
- a rectangular casing formed of a front segment and a rear segment and defining an inner cavity;
the front face of said front segment being provided with two pairs of apertures, each adapted to receive the blade contacts of one electrical plug;
forwardly extending resiliently-bendable conductive friction members, disposed rearwardly of each one of said apertures in said cavity and defining a channel for each said blade contact;
connection means to electrically connect each friction member to a respective conductor connected to a power source;
a lock element made of resilient non-conductive material, and disposed between pairs of contiguous channels;
said lock element having a lock means adapted to releasably lock into the openings of said blade contacts; and
an externally-operable release means to release the lock means, whereby said plugs can be lockingly engaged and disengaged from said receptacle without any possibility of electric shock. - View Dependent Claims (6, 7, 8)
- a rectangular casing formed of a front segment and a rear segment and defining an inner cavity;
Specification