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Lever-tumbler lock



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Source page: http://commons.wikimedia.org/wiki/File:Lever-tumbler_lock.jpg


English: A hand-drawn schematic of a lever tumbler lock, based on an image in the book "How things work today" by Michael Wright, Mukul Patel.


  • 1: key
  • 2: bolt
  • 3: spring-loaded block
  • 4: bolt pin
  • 5: key indentations (additional ones can be added to increase security; if additional ones are added, more blocks need to be added too)
Emblem-question-red.svg The factual accuracy of this description is disputed.
Reason: Although described as a warded lock, this is actually a single lever lock. It has one lever (#4) and a bolt. There are no wards. The key is also rather poorly drawn, as it shows a simple full-depth cut for the lever - perhaps the original diagram did have a ward here and it has been simplified when re-drawn? It's mis-leading (although not quite incorrect) to show a full depth cut for the lever, as the precise depth of the cuts here is how the lever lock works. There is also a cut at the bolt, which once again is non-functional, as there are no wards.

The image could form the basis (if a little clearer) for a useful illustration of a single lever lock, an appropriate simplification to demonstrate multi-lever locks. However it ought to be re-named, perhaps to single-lever lock.jpg?

Date 16 March 2011(2011-03-16)
Source Own work
Author KVDP


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EXIF data:
File name lever-tumbler_lock.jpg
Size, Mbytes 0.237297851562
Mime type image/jpeg
Camera manufacturer KONICA MINOLTA
Camera model DiMAGE Z6
Orientation of image 1
Image resolution in width direction 72
Image resolution in height direction 72
Unit of X and Y resolution 2
Exposure time 1/60 sec (0.0166666666667)
F number f / 3.2
Exposure program 2
ISO speed rating 50
Exif version 0220
Lens focal length 5.859375 mm
Date and time original image was generated 2011:03:16 08:29:46
Date and time image was made digital data 2011:03:16 08:29:46
Meaning of each component 
Brightness 5
Exposure bias 0
Maximum lens aperture 3
Metering mode 5
User comments
Supported Flashpix version 0100
Color space information 1
Exif image width 1413
Exif image length 1428
InteroperabilityOffset 34304
Subject location Array
Digital zoom ratio 0
Focal length in 35 mm film 35 mm
Subject distance range 1
Interoperability index R98
Interoperability version 0100
Software used GIMP 2.6.4
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