Belwith International, Ltd.

C Norman Sjogren

A compact push-pull right-angle lock especially suited for use on patio doors and on windows has a cylindrical bolt with rack teeth on its central section, a barrel lock assembly, and a rotatable disk all contained in a horizontally split case. The bolt can be extended in either direction by the right angled linear motion of the barrel lock assembly. Linear motion of the barrel lock assembly is transferred to linear motion of the bolt through a disk that is free to rotate some fifty degrees about a shaft. The barrel lock assembly is loosely linked to a crank pin set perpendicularly to the plane of the disk and the bolt rack is meshed with an arcuate section of a pinion gear on the disk located some ninety degrees from the crank pin. The bolt can be locked in either extended position by means of a cam lug which cna be moved from the barrel lock assembly housing into locking recesses in the case by rotational movement of the keyed barrel lock. Means are also provided for replacement of the barrel lock when necessary.

Rotary door and window lock

A sliding door lock in which a bolt is longitudinally slidable by manual movement of a handle to which the bolt is connected so that the bolt is axially rotatable to prevent the cutting of the bolt when locked. The handle slides linearly along a base plate to move the bolt between opened and closed positions. A bullet latch in the handle engages detents on the base plate to hold the handle and bolt in the open and closed positions. A key-operated barrel lock has a barrel groove through which the bolt passes when the lock is in the unlocked position, and the bolt has a circumferential constriction which receives the barrel lock barrel when the barrel lock is rotated to its locked position, thereby preventing movement of the handle and bolt to the open position.

Growing community of inventors

San Gabriel, CA, United States of America

C Norman Sjogren