公开(公告)号：US3674297A

公开(公告)日：1972-07-04

申请号：US3674297D

申请日：1971-01-21

Applicant: DONALD B HAWKINS

Inventor： HAWKINS DONALD B

IPC: E05C19/18 ,  E05C19/00

CPC classification number: E05C19/18 ,  Y10T292/1013 ,  Y10T292/1022 ,  Y10T292/14

Abstract: An extremely simple yet tamperproof lock including a plate member adapted for securance to a door jamb and a latch member movable away and towards the plate member. In the extended position of the latch member a door hinged to the jamb may not be swung inwardly since it will engage the latch member. The lock further includes a ball which must be raised and permitted to enter a ball receiving portion of the plate member in order to permit return of the latch member to its retracted inoperative position. When the latch member is moved outwardly into its locking or operative position, the ball gravitally falls downwardly and prevents return of the latch member until the ball is manually raised.

公开(公告)号：US3626507A

公开(公告)日：1971-12-07

申请号：US3626507D

申请日：1969-10-24

Applicant: DONALD B HAWKINS

Inventor： HAWKINS DONALD B

IPC: E05B65/08 ,  E05C1/00 ,  E05C13/02

CPC classification number: E05B65/0864 ,  Y10S70/52 ,  Y10T292/0997 ,  Y10T292/0999

Abstract: A device for locking sliding patio doors and other sliding sashes characterized by an extremely simple construction featuring an overcenter spring-induced toggle action imparted to a lock bolt to selectively urge same into locked position or hold same in open or unlocked position. The spring functions as a keeper for retaining the bolt in locked position and as a stop for determining the unlocked position of the bolt.

公开(公告)号：US3415560A

公开(公告)日：1968-12-10

申请号：US57297966

申请日：1966-08-17

Applicant: DONALD B. HAWKINS

Inventor： HAWKINS DONALD B

IPC: E05B65/08 ,  E05C19/00

CPC classification number: E05C19/007 ,  E05B65/08 ,  Y10T292/14