Document Type and Number:
Japanese Patent JPS4970798
Kind Code:
A
Abstract:
A cylindrical lock set including an operating unit having a cylindrical housing containing a unitary retractor frame of non-metallic, low-friction material supporting a unitary metallic retractor slide. A latch unit releasably connected to the operating unit includes a case supporting a latch bolt releasably connected to the retractor slide by a female tailpiece. Coengageable cam surfaces on the tailpiece and on a deadlocking member carried by the latch bolt positively drive the deadlocking member to a deadlocking position relative to the case if an attempt is made to forcibly depress the latch bolt as by insertion of a tool between the outer edge of an associated door and strike plate. The operating unit also includes a locking mechanism for locking a rollback against rotation relative to the housing.
Application Number:
JP10706973A
Publication Date:
July 09, 1974
Filing Date:
September 25, 1973
Export Citation:
International Classes:
E05B55/14; E05B55/00; E05B63/08; (IPC1-7): E05B63/10
Domestic Patent References:
| JP35017647A | ||||
| JP35005547A |