Safety and security outlet
First Claim
1. An electrical receptacle lock comprisinga housing having a chamber therein,a pair of conducting prongs mounted on and extending from a wall of the housing and adapted to be inserted in an electrical outlet,a pair of openings in another wall of the housing for receiving the prongs of a plug,a first electrical contact in the housing electrically connected to one of the prongs mounted on the housing and positioned to be engaged by one of the prongs of the plug mounted in one of said openings,a second electrical contact in the housing capable of engaging connecting and disconnecting to the other of the prongs mounted on the housing for electrical connection and disconnection of said contact and prong and positioned to be engaged by the other of the prongs of the plug in an opening,switching means mounted in the housing for moving the second electrical contact for making and breaking the electrical connection of the second electrical contact with one of its prongs, andlatching means associated with one of the contacts for preventing the plug from being withdrawn from the openings in the housing when the switching means is in the breaking condition.
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Accused Products
Abstract
An electrical receptacle lock having a housing carrying a pair of prongs to be mounted in a conventional wall outlet. Openings are provided in the housing to receive the plug prongs of an appliance to be controlled by the lock. One contact in the housing connects one plug prong to a housing prong, and a second contact connects the other prongs. A key operated cam in the housing makes and breaks one of the contacts, and latching means carried by that contact mechanically locks onto the plug prong. The latching means is controlled by a stem mounted in the housing but cannot be operated to unlock the plug prong to enable the plug to be withdrawn unless the key operated cam is positioned to make the contact.
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Citations
9 Claims
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1. An electrical receptacle lock comprising
a housing having a chamber therein, a pair of conducting prongs mounted on and extending from a wall of the housing and adapted to be inserted in an electrical outlet, a pair of openings in another wall of the housing for receiving the prongs of a plug, a first electrical contact in the housing electrically connected to one of the prongs mounted on the housing and positioned to be engaged by one of the prongs of the plug mounted in one of said openings, a second electrical contact in the housing capable of engaging connecting and disconnecting to the other of the prongs mounted on the housing for electrical connection and disconnection of said contact and prong and positioned to be engaged by the other of the prongs of the plug in an opening, switching means mounted in the housing for moving the second electrical contact for making and breaking the electrical connection of the second electrical contact with one of its prongs, and latching means associated with one of the contacts for preventing the plug from being withdrawn from the openings in the housing when the switching means is in the breaking condition.
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7. An electrical receptacle lock comprising
a housing, a pair of conducting prongs mounted on and extending from a wall of the housing and adapted to be inserted in a conventional electrical outlet, a pair of openings in another wall of the housing for receiving the prongs of a conventional plug, a first electrical contact in the housing electrically connected to one of the prongs mounted on the housing and positioned to be engaged by one of the prongs of the plug mounted in said openings, a second electrical contact in the housing engaging the other of the prongs mounted on the housing and positioned to be engaged by the other of the prongs of the plug, key operated switching means mounted in the housing for making and breaking the engagement of the second electrical contact with one of its prongs, said second electrical contact making and breaking engagement with its prong mounted on the housing, said second contact being biased to engage that prong and movable by said switching means out of engagement therewith, latching means also carried by said second contact for locking the plug prong engaged by said second contact in the housing opening, and means operable only when the second contact is in the biased position engaging the prong mounted on the housing causing the latching means to unlock the plug prong.
Specification