1520429 Door chain Y NAKANISHI 9 Oct 1975 [6 Dec 1974 30 Jan 1975] 41409/75 Heading E2A A door chain for restricting the degree of opening of a door, comprises a chain 8 attached at one end to anchoring means 3 and carrying at the other end a plate 11 having an elongated slot 13...
The meaning of DOOR CHAIN is a chain serving as an inside lock for preventing a door from opening more than a few inches until one end is withdrawn from a slide fitting.
Programmable Mifre S50 Smart Keychain for Hotel Door Lock, Find Details and Price about Custom Key Fob 13.56MHz RFID Key Fob from Programmable Mifre S50 Smart Keychain for Hotel Door Lock - FOCUS RFID CO., LTD.
US Patent References: 2118635Combination lock and chain1938-05-24 1946788Damper control for wall registers or grilles1934-02-13 1575429Chain door fastener1926-03-02 1325538N/A1919-12-23 0931895N/A1909-08-24 Foreign References: GB191221844A1913-03-13...
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door chain lock for door and home security, solid brass construction (single pack) by prime-line 0.7" h x 2.55" w x 0.85" d $14.03 this chain door guard lock is a security locking device for doors, allowing a door to be slightly opened to allow safe viewing and ventilation. this ...
A door chain, security chain, or security door chain consists of a small chain attached to the door frame, which attaches to a track on the door for security purposes. It is a type of lock that is often used along with other types of locks to secure a door. ...
The door-locking system incorporates a chain (3) on the indoor side placed over a first holder on the door itself, e.g. the handle, and over a second one screwed to the frame or wall. With the door slightly open, the free ends of the chain can be secured together by a padlock fr...
Wifi/Voice Control - Add Wifi gateway to this lock, you can unlock/lock your door remotely, and reach for voice control by alexa device More than just a lock - BHMA authenticated, not only bring you safety and reliability, but also bring you a brand new smart world. Fi...
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