Medeco Security Locks, Inc.

Stevie C Roop

Peter H Field

Charles E Hall

Ronald N Oliver

Dropbolt lock

A dropbolt lock having a pair of dropbolts movable between knuckles is assembled on a formed steel assembly plate which is attached to a base plate, the assembly plate providing the spaced knuckles. A cam operator operates the dropbolts between true dead lock positions. On the inside of the lock, a cylinder lock or a thumb turn may be assembled by a single screw. The cover is provided with attachment screws which are concealed by the locking bolt when in locked position.

Dropbolt lock assembly

A high security post lock according to the invention includes a hardened shell having a head member at one end thereof and an eccentric locking cam rotatably mounted at the other end. The lock is adapted to be inserted through an opening passing through a door frame and a door to secure the door. In a first or open position, the circumference of the cam is coextensive with the circumference of the shell, so that the lock can be inserted into and withdrawn from the door. In a second or locked position, the locking cam projects outwardly from the shell to prevent withdrawal of the lock and thus secure the door. Movement of the cam is limited by a pin and groove arrangement.

High security post lock

A combination switch lock/cam lock assembly which includes a one-piece shell, a plug with a tenon, an electrical switch, and a cam is insertable from the front face of a panel opening by not affixing the cam until after the lock is inserted. After the lock is inserted in the panel and secured by a panel nut, the cam is installed by insertion through a slot in the shell to engage and be rotated by the tenon, and a spring-like retainer carried by the cam grips the tenon to retain the cam on the tenon and prevent the cam from being easily removed from the shell.

Combination switch lock/cam lock assembly

A high security drop-bolt lock assembly for a door includes a cylinder lock carried by a guard plate positionable on the outside of the door with the cylinder lock within the door, and a drop-bolt assembly on the inside of the door. The drop-bolt assembly is connected to protected studs extending from the guard plate to make a strong unitary construction extremely difficult to defeat and protecting the cylinder lock behind the guard plate and within the door.

Drop-bolt door lock assembly

A mechanism for smoothly and reliably operating a drop-bolt lock in which the drop-bolt operating mechanism includes a slidable bolt member carrying a cross slidable biased actuator member operable by cams for smooth sliding operation. Guide rails guide the sliding movement of the bolt member and the actuator member it carries, but the guides include a stop for cooperating with a lug on the actuator member to stop movement of the bolt unless and until the actuator member is forced away from the stop.

Mechanism for operating a drop-bolt door lock

A pop-out T-handle assembly of the type containing a lock cylinder having high security features which defy forced entry is disclosed. A cylinder front handle and cylinder/extension housing are assembled around the cylinder lock and rigidly secured for protection against pulling the lock. The face of the cylinder lock is preferably protected by a freely rotating cylinder protector plate to protect against drilling into the cylinder lock. A locator tab and slot arrangement assures alignment of the cylinder lock bolt and a corresponding opening in the T-handle housing, as well as restricts lateral movement of the cylinder front handle within the T-handle housing to protect against prying. A T-handle clutch arrangement of a generally square configuration provides extensive bearing surface to absorb torque and prevent wear. An auxiliary locking mechanism for added protection against pulling the inner cylinder of the lock in the event that the cylinder protector plate is defeated or a method is devised to either pull or pry the cylinder front handle.

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Dugspur, VA, United States of America

Stevie C Roop