Key duplicating machine
OwnerMasaji Teradainventor
Life of this patent
Estimating the term…
Abstract
A device to duplicate a key utilizing the predetermined pitch codes and depth codes of the key to be duplicated, wherein a punch which produces an individual pattern of serrations and a die which makes a pair with said punch are used, a key-holding means which clamps a blank key to be duplicated is moved to the specified position by the use of a pitch code plate and either a depth code plate provided with stair-like codes corresponding respectively to the depth code of the key to be duplicated or a depth code piece whose contacting faces have the width corresponding respectively to the depth code of the key to be duplicated and, by the use of aforesaid punch and die, an individual serration pattern is formed one by one on the blank key mounted on the device.
Claims4
A key duplicating machine for producing new original keys corresponding to key codes, comprising:
- a frame having a base portion and a substantially C-shaped vertical member;
- a manual pressing lever pivotally disposed at a top portion of said vertical member;
- punch means including a guide member disposed vertically beneath said pressing lever and a die disposed therebelow;
- key-holding means rotatably and slidably installed on a supporting shaft attached to said base portion by supporting arms such that said key-holding means on the supporting shaft is movable longitudinally with respect to said frame and is slidably movable on the shaft transversely with respect to said frame;
- and
- a pitch code plate having a plurality of spaced grooves therein at preset positions forming a code groove detecting portion corresponding to a key pitch code, said pitch code plate being removably mounted on said frame base portion with said grooves extending longitudinally with respect to said frame;
- depth code plate means having a plurality of areas of different widths representing serration depths of a key, said depth code plate means being removably attached to said key-holding means and adjustably movable transversely thereon to selectively limit extent of longitudinal movement of said key-holding means by abutment with an element of said punch means;
- and
- means on said key holding means engagable with selected pitch code plate grooves, by rotating and sliding said key-holding means on said supporting shaft, to guide said key-holding means in longitudinal movement on said frame base portion so as to bring predetermined pitch portions of a key blank clamped in said key-holding means into cutting engagement with said punch means, wherein depth of said cutting engagement is determined by the limit of movement set by selected width areas of said depth code plate means, and wherein said manual pressing lever is operated to cut serrations of pitch and depth determined by said selected grooves of said pitch code plate and said depth code plate means width areas.
Dependencies are inferred from the claim text.