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Title: Stock sensing device

Abstract: An apparatus utilizes fluid pressure measurements to sense sufficient chucking stock for a chuck with work gripping surfaces. A flexible seal cooperates with a workpiece at a location proximal to the chuck jaws to restrict flow of a pressurized fluid. Flow resistance varies at this location with the presence or absence of sufficient chucking stock. A pressure switch senses the resulting fluid backpressure which varies with the resistance of the flow path and generates a signal indicative of the presence or absence of sufficient chucking stock which is used to control functions of a machine tool.


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Inventors: Cox, Joseph Henry (Cincinnati, OH, US)

Application Number: 741206
Filing Date: 1976-11-12
Publication_date: 1977-09-20
Assignee: Cincinnati Milacron Inc. (Cincinnati, OH)
Primary Class(es): 82/142 82/124, 82/127, 200/61.41, 408/7, 414/14
Other Classes:
US Patent Ref:
2625061Jan, 1953Mansfield408/7.
3703112Nov, 1972Selby82/2.
3823628Jul, 1974Fortune82/2.

Other Refs:
Primary Examiner: Vlachos, Leonidas
Assistant Examiner:
Attorney: Liles; James D.