Timing device and method for positioning non-linear machine part

Details Timing device and method for positioning non-linear machine part Timing device and method for positioning non-linear machine part

1997-07-15

1999-09-28

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33706, 356395, 25023116, G01B 1102

Patent

active

059592958

ABSTRACT:
A method and device for positioning non-linear machine parts using a timing element, particularly for machine parts that are in non-linear motion. The invention has a pair of sensors spaced apart for reading bar code marks on the timing unit when the timing unit is disposed on a circular or spherically-shaped carrier surface. Where long surfaces are involved, the ends of the timing unit or clock ruler are butt-jointed together and include a gap having a width deviating from the window openings of the bar code. Thus, the second sensor, which is connected to a second comparator, contains a test circuit for the code signals that are received. When the code signals do not correspond to the width of the bar code pitch, they are passed over to a second counter, and the first counter is disconnected from the line. In addition, a comparator connected to the second sensor also contains a test circuit for the window openings of the timing element so that the code signals are connected to a transfer or storage unit when not conforming to the width of the pitch of the code marks. The transfer unit transfer the signals added up and received from the second counter to the first counter.

REFERENCES:
patent: 3671750 (1972-06-01), Heitmann et al.
patent: 4145608 (1979-03-01), Shirasaki et al.
patent: 4158509 (1979-06-01), Rieder et al.
patent: 4952874 (1990-08-01), Stadtfeld
patent: 5508088 (1996-04-01), Braun

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