Detainer levers - Revision history

Sandplum: /* See also */ category safes

2021-03-18T05:13:03Z

Datagram: moved Detainer Levers to Detainer levers: caps fix

2021-02-02T20:20:39Z

moved Detainer Levers to Detainer levers: caps fix

← Older revision

Revision as of 20:20, 2 February 2021

Sandplum: moved Detainers to Detainer Levers: describes detainers specific to levers

2021-02-01T09:43:47Z

moved Detainers to Detainer Levers: describes detainers specific to levers

← Older revision

Revision as of 09:43, 1 February 2021

Sandplum: /* Detainers (Lever locks) */ clarify terms

2021-02-01T09:38:55Z

Detainers (Lever locks): clarify terms

← Older revision		Revision as of 09:38, 1 February 2021
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	=~~Detainers~~ (Lever locks)=		=Detainer Levers (Lever locks)=


	[[File:110_detainers.jpg\|thumb\|right\|600px]]		[[File:110_detainers.jpg\|thumb\|right\|600px]]

	'''~~Detainers~~''' are a type of [[lever]] lock component design.		'''Detainer levers (detainers)''' are a type of [[lever]] lock component design.
	{{stub}}		{{stub}}
	__TOC__		__TOC__
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	== Principles of operation ==		== Principles of operation ==

	Most in common use have a H shaped gate completely contained within the lever. Thus it is impossible to see the position of the gates from outside without penetration of the outer shell or at least the door.		Most levers in common use have a H shaped gate completely contained within the lever pocket. Thus it is impossible to see the position of the gates from outside without penetration of the outer shell or at least the door.

	Detainer ~~locks~~ however have a cut notch on the front edge. Operation is such that the key lifts the ~~detainer~~ to the correct height for a mechanism to test the detainer positions, then resets. This requires a marked increase in complexity so is only found in higher end locks such as the successful high security Chubb 110 series.		"Detainer" levers however have a cut notch on the front edge. Operation is such that the key lifts the lever to the correct height for a mechanism to test the detainer positions, then resets. This requires a marked increase in complexity so is only found in higher end locks such as the successful high security Chubb 110 series.

	(Note that on some newer UK domestic lever locks, the end of the lever is open for the bolt to slide though. They have only half of the H inside the lever, and look somewhat like a detainer, but they are not true detainers as they are not tested but directly interact with the stump. The reason for this change is due to the increase of the locking bolt length requirement in BS3621:2003 and manufacturers needed to increase the bolt travel without changing the key size.)		(Note that on some newer UK domestic lever locks, the end of the lever is open for the bolt to slide though. They have only half of the H inside the lever, and look somewhat like a detainer, but they are not true detainers as they are not tested but directly interact with the stump. The reason for this change is due to the increase of the locking bolt length requirement in BS3621:2003 and manufacturers needed to increase the bolt travel without changing the key size.)

Datagram: Styling and categorization

2015-02-05T20:03:47Z

Styling and categorization

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-Lever locks are commonly grouped into two types - detainer and [[lever]].
+=Detainers (Lever locks)=
 Most in common use have a H shaped gate completely contained within the lever. Thus it is impossible to see the position of the gates from outside without penetration of the outer shell or at least the door.
@@ Line 9: / Line 18: @@
 The detainer allows mechanical advantage to amplify the variations of the key in the 110 series, and this allows for 9 cuts to the key, symmetric about the middle 5th cut, interacting with the 5 detainers, to have 9 different lifts with no MACS restrictions. Further, because the mechanism checks the detainer for a notch at the correct height, it is possible to have a detainer with, for example, a notch at the 3rd cut lift height and the 6th cut height which will still prevent a key with a 4th or 5th cut from working, unlike a common lever lock.
-[[File:110_detainers.jpg]]

NKT at 00:40, 3 February 2015

2015-02-03T00:40:44Z

← Older revision		Revision as of 00:40, 3 February 2015
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	The detainer allows mechanical advantage to amplify the variations of the key in the 110 series, and this allows for 9 cuts to the key, symmetric about the middle 5th cut, interacting with the 5 detainers, to have 9 different lifts with no MACS restrictions. Further, because the mechanism checks the detainer for a notch at the correct height, it is possible to have a detainer with, for example, a notch at the 3rd cut lift height and the 6th cut height which will still prevent a key with a 4th or 5th cut from working, unlike a common lever lock.		The detainer allows mechanical advantage to amplify the variations of the key in the 110 series, and this allows for 9 cuts to the key, symmetric about the middle 5th cut, interacting with the 5 detainers, to have 9 different lifts with no MACS restrictions. Further, because the mechanism checks the detainer for a notch at the correct height, it is possible to have a detainer with, for example, a notch at the 3rd cut lift height and the 6th cut height which will still prevent a key with a 4th or 5th cut from working, unlike a common lever lock.

			[[File:110_detainers.jpg]]

NKT: Detainer locks

2015-02-03T00:28:44Z

Detainer locks

New page

Lever locks are commonly grouped into two types - detainer and [[lever]].

Most in common use have a H shaped gate completely contained within the lever. Thus it is impossible to see the position of the gates from outside without penetration of the outer shell or at least the door.

Detainer locks however have a cut notch on the front edge. Operation is such that the key lifts the detainer to the correct height for a mechanism to test the detainer positions, then resets. This requires a marked increase in complexity so is only found in higher end locks such as the successful high security Chubb 110 series.

(Note that on some newer UK domestic lever locks, the end of the lever is open for the bolt to slide though. They have only half of the H inside the lever, and look somewhat like a detainer, but they are not true detainers as they are not tested but directly interact with the stump. The reason for this change is due to the increase of the locking bolt length requirement in BS3621:2003 and manufacturers needed to increase the bolt travel without changing the key size.)

The detainer allows mechanical advantage to amplify the variations of the key in the 110 series, and this allows for 9 cuts to the key, symmetric about the middle 5th cut, interacting with the 5 detainers, to have 9 different lifts with no MACS restrictions. Further, because the mechanism checks the detainer for a notch at the correct height, it is possible to have a detainer with, for example, a notch at the 3rd cut lift height and the 6th cut height which will still prevent a key with a 4th or 5th cut from working, unlike a common lever lock.

← Older revision		Revision as of 05:13, 18 March 2021
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	[[Category:Lever locks]]		[[Category:Lever locks]]
			[[Category:Safes]]