B - Operations – Transporting – 26 – B
Patent
B - Operations, Transporting
26
B
30/64, 74/71
B26B 1/08 (2006.01) A61B 17/32 (2006.01) B26B 5/00 (2006.01) F16H 25/20 (2006.01)
Patent
CA 1037701
Abstract of the Disclosure Rotary motion is converted to linear motion by multiple thread sets which cooperate to provide precise control of the amount of rotary motion thus converted. As applied to a precision positioning device for a tool, blade or other object, the thread sets are preferably arranged in a serial and/or telescop- ed configuration. A relatively simple precision hand tool positioning device is realized by having one thread set arranged in a common direction but reduced pitch re- lative to the other set. The finiteness of the object positioning is further enhanced by moving it with res- pect to an inclined plane. A retaining device for grip- ping the element to be moved is directly associated with a shank having the smaller pitched thread set thereon. The shank is prevented from rotating but allowed to move linearly relative to a housing and the threads thereof engage a spindle which has another set of threads for engaging the housing. A calibrated indicator of the shank position in easily readable format is provided. A split collet for the shank with a spring biased collet clamp and actuator is particularly well-suited for use as a tool chuck especially useful for calibrated craftsman knives. A detent arrangement can be included with the housing.
247320
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