Thread making device
OwnerThomas A. M. Hallettinventor
Life of this patent
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Abstract
A thread making device that has a thread form with controlled height adjustment. The thread making device is formed from a threading cartridge mounted on a threading bar. A thread form with a cutting edge is secured in a pocket on the threading cartridge bounded on one side by an adjustable height clamp, whose position relative to the threading cartridge is controlled by serrated faces on the adjustable height clamp and the threading cartridge. The thread form has a thickness extending in a wear direction, and the serrations of the serrated faces allow height adjustment of the adjustable height clamp in the wear direction.
Claims6
A thread making device, comprising:
- a threading bar;
- a threading cartridge mounted on the threading bar, the threading cartridge having a first serrated face;
- a thread form mounted on the threading cartridge for cutting a thread along a curved surface of a rotating workpiece, the thread form having a cutting edge;
- an adjustable height clamp having a second serrated face, the adjustable height clamp being secured to the threading cartridge with serrations of the first serrated face engaged with serrations of the second serrated face and clamped against the thread form to hold the thread form on the threading cartridge;
- the thread form having a thickness extending in a wear direction;
- the serrations of each of the first serrated face and the second serrated face being oriented in a direction that allows height adjustment of the adjustable height clamp in the wear direction;
- and
- the adjustable height clamp being movable in the wear direction to selectively engage serrations of the first serrated face and the second serrated face and maintain the cutting edge at a constant height within a tolerance established by the width of individual serrations of the first serrated face and the second serrated face.
Dependencies are inferred from the claim text.