Title: Control system for repetitive processes

Abstract: In a process control system for machines operating according to a repetitive cycle, with a number of machine events occurring in appropriate mutual phase relationship during the cycle, transducers are employed in association with rotating parts of the machine to generate reference pulses, one at the end of each complete cycle, and a large number of marker pulses equally between consecutive reference pulses. The marker pulses drive a counter which is reset to zero by each reference pulse; and at each count increment the count is compared with he whole contents of a memory in which is stored count numbers constituting data as to the points in the machine cycle at which particular events are to commence and terminate, with output stages responsive to the comparator and the memory addressing control giving output control signals when number identity is recognized.

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Inventors: Thompson, Lionel Raymond Frank (Hatfield, EN)

Application Number: 543650
Filing Date: 1975-01-23
Publication_date: 1976-08-10
Assignee: Hawker Siddeley Dynamics Engineering Limited (EN)
Primary Class(es): 318/562 318/569, 318/603, 318/625, 327/273
Other Classes:
US Patent Ref:

3719926	Mar, 1973	Sangster et al.	318/569.
3757187	Sep, 1973	Arai	318/562.
3760251	Sep, 1973	Posi et al.	338/601.
3766407	Oct, 1973	Hegendorfer	307/223.
3774056	Nov, 1937	Sample et al.	307/293.
3792332	Feb, 1974	Fuller	318/562.
3801835	Apr, 1974	Tasso	307/293.
3821624	Jun, 1974	Iadipaolo et al.	318/603.
3829784	Aug, 1974	Eshraghian	328/130.
3876950	Apr, 1975	O'Connor	328/130.
3889238	Jun, 1975	Sakurai	340/172.

Other Refs:
Primary Examiner: Rubinson, Gene Z.
Assistant Examiner: Feldhaus, John J.
Attorney: Rose & Edell