| 摘要 |
For use in combination with a pin-tumbler lock cylinder of the type having a key plug nested within a control cylinder which in turn is nested within a main body cylinder and including a plurality of bores extending through the key plug, the control cylinder and the main body cylinder with a pin-tumbler located in each of the bores, a measuring device for determining the pin-tumbler size for preparing a control key includes a body having a cylinder mating face and a probe which extends from the cylinder mating face. The cylinder mating face is mated against the outside of the main body cylinder with the probe positioned within the bore. When the interface between the driver pin and the control pin is located at the shear line between the control cylinder and the main body cylinder, the length of the probe which is accepted within the bore is an indication of the cut necessary for preparing a control key for the lock.
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