초록 ▼

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 ha

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.

대표청구항 ▼

1. 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 t

1. 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. 2. A security system as claimed in claim 1 wherein the cylinder housing is adapted for accepting a plurality of interchangeable key plugs with each key plug having a respective operating key. 3. A security system as claimed in claim 1 wherein the retainer means includes a tail means extending exteriorly of the cylinder housing, said tail means further being registrable with the latching mechanism. 4. A security system as claimed in claim 3 wherein the tail means includes a fin member, said cylinder housing defining a complementary groove positioned interiorly of the housing for interfitting engagement with the fin member during rotational displacement of the key plug to provide additional securement for retainment of the key plug within the cylinder housing. 5. A security system as claimed in claim 1 wherein the latching mechanism is mounted along a margin of the access opening and includes a pivotally mounted cam, at least one lock bar pinned at one end to the cam, the other end of said lock bar being engageable with the closure means during rotational displacement of the cam. 6. A security system as claimed in claim 5 wherein the latching mechanism includes a keyway for accepting a tail means when the closure means is within the access opening, said keyway being linked to the cam whereby rotation of the key plug displaces the lock bars. 7. A security system as claimed in claim 6 wherein the closure means includes a flange member projecting normally from an edge of said closure means, said flange member being provided with a locking slot, said locking slot being adapted for receiving the other end of said lock bar. 8. A security system as claimed in claim 7 further including a hinge return extending along a vertical edge of the closure means, said access opening defining a confronting inturned lip along a margin of said opening, said hinge return being adapted for cooperative interlocking with the inturned lip when the closure means is within the access opening. 9. A security system as claimed in claim 7 wherein the closure means is hingedly mounted to the receptacle means, said mounting including a hinge pin, said pin extending through a pair of aligned apertures in a respective upper and lower flange member, the opposite ends of said hinge pin being secured in a respective top and bottom wall of the receptacle. 10. A security system as claimed in claim 1 wherein the cylinder housing includes a cylindrical passageway adapted for slidably accommodating the key plug for longitudinal and rotational movement. 11. A security system as claimed in claim 10 wherein the key plug is provided with key retention means for preventing removal of an operating key, said key retention means including a spring biased keeper bar, said keeper bar being adapted for engaging the key when the keeper bar is urged within the key plug by a confronting surface of the cylindrical passageway. 12. A security system as claimed in claim 11 further including a longitudinal channel within the cylindrical passageway for selective registration with the keeper bar, whereby the key can be withdrawn from the key plug. 13. A security system as claimed in claim 12 wherein the longitudinal channel is registrable with the keeper bar when the tail means is lockingly engaged within the cylinder housing. 14. A security system as claimed in claim 13 wherein the passageway contains a portal notch, said portal notch being adapted for depressing the keeper bar during insertion of the key plug, said keeper bar further being releasable within said channel upon rotation of the key plug and actuation of the latching mechanism to a locked position. 15. 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.