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US 4,539,828 AGranted
Security lock box with removable key plug
OwnerWalter Telekyinventor
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OwnerWalter Telekyinventor
Estimating the term…
A security lock box includes a receptacle having an access opening and a hinged door. A vertical door edge adjacent th hinge is provided with an edge return which engages an inwardly curved lip along the receptacle opening for preventing entry through removal of a hinge pin. The door additionally has flanges extending transversely along top and bottom edges. The flanges are adapted for cooperative interfitting within confronting guard recesses along the margin of the receptacle opening. A locking mechanism having a pair of selectively slidably locking bars is positioned within the access opening. The locking bars are extendable through slots within the door flanges for securing the door in a locked mode. The locking mechanism is activated by a cylinder lock mounted in the door. The cylinder lock includes a cylindrical housing for accommodating a removable key plug and operating key adapted for interchangeable applications within a plurality of similar lock cylinders. The key plug includes a tail member for engaging the locking mechanism and is further provided with a keeper element for retaining the key plug within the cylinder housing when the door is in a locked mode.
A security system utilizing a removable key plug comprising receptacle means for the safekeeping of valuables, said receptacle means including an access opening, closure means positionable within the access opening, a latching mechanism for securing the closure means in a locked position within the access opening, locking means mounted to said closure means, said locking means including a cylinder housing, at least one key plug, said key plug being removably accommodatable within the cylinder housing for actuating the latching mechanism, said key plug further including retainer means for simultaneously engaging the cylinder housing when the latching mechanism is actuated to a locked position and for disengaging the key plug for withdrawal from the cylinder housing when the latching mechanism is in an open position.
A security lock box for the safekeeping of valuables including a lock cylinder in combination with interchangeable key plugs and comprising a receptacle, said receptacle having an access opening, a door for closing said access opening, latching means for securing the door in a locked position, said door including a cylinder housing, said cylinder housing defining a passageway therethrough, said cylinder housing further being adapted for receiving a plurality of removable key plugs, said key plugs being selectively insertable in the passageway at one end of the housing, said housing further defining a shoulder segment at the other end, said key plug including a tail member, said tail member being registrable with and adapted for actuating the latching means when the door is within the access opening, with said tail member being simultaneously engageable with the shoulder segment for preventing withdrawal of the key plug when the latching mechanism is actuated to a locked position and disengageable from the shoulder segment when the latching mechanism is in an opening position.
Dependencies are inferred from the claim text.