Night latch explained

A night latch (or night-latch or nightlatch) is a lock that is fitted on the surface of a door; it is operated from the exterior side of the door by a key and from the interior (i.e. "secure") side of the door by a knob.^{[1] [2] [3]}

Overview

Night latches are usually rim locks^[4] and are available as deadlocking (automatically locks once shut) and non-deadlocking versions.

Historically, such locks were intended for use at night-time, hence the name.^[5] The keyless egress that they offer is a valuable fire safety measure, but may be a security risk if breaking a glass panel (usually in the door) or a nearby small window allows an intruder to reach the knob inside and open the door from the outside.

References

Sources

• Some Signed American Iron Rim Locks. Donald. Streeter. 26 September 1973. Bulletin of the Association for Preservation Technology. 5. 2. 9–37. 10.2307/1493393. 1493393.
• Web site: ProQuest . How much security is enough? - ProQuest . 2018-09-26. ProQuest.
• Book: A strategy for security of buildings - IEEE Conference Publication . 189–196 . . 10.1109/CCST.1995.524911 . A strategy for security of buildings . 1995 . Harrington-Lynn . J. . Pascoe . T. . 978-0-7803-2627-9 . 62740777 .
• Web site: NCJRS Abstract - National Criminal Justice Reference Service. www.ncjrs.gov.
  • Web site: ProQuest . Simple security measures: how to safeguard your practice - ProQuest . 2018-09-26. ProQuest.

External links

• Smonet Deadbolt Lock

Notes and References

1. Web site: Definition of NIGHT LATCH. www.merriam-webster.com.
2. Book: Hasluck, Paul N. . The Handyman's Guide: Essential Woodworking Tools and Techniques . 8 February 2011. Skyhorse Publishing, Inc.. Google Books. 9781626366589.
3. Web site: Life. John Ames. Mitchell. 26 September 2018. Life. Google Books.
4. Book: Jones, Tony L.. COURT SECURITY: A Guide for Post 9-11 Environments. 1 January 2003. Charles C Thomas Publisher. Google Books. 9780398084356.
5. Book: Sturgis' Illustrated Dictionary of Architecture and Building: An Unabridged Reprint of the 1901-2 Edition. Russell. Sturgis. Francis A.. Davis. 23 April 2013. Courier Corporation. Google Books. 9780486145921.