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( 355429 of 355429 ) |
United States Patent | 3,552,308 |
Minehart | January 5, 1971 |
In synchronizing the movement of first and second articles, such as an elongated strand (jacketed cable) and a rotatable printing wheel mechanism for printing markings on the strand at accurately spaced intervals, the printing wheel mechanism is rotatably driven by a variable speed drive mechanism. The variable speed drive mechanism. The variable speed drive mechanism and a strand advancing mechanism drive respective signal generating devices, the signals of which are compared to produce a coarse analogue control signal representative of any difference therebetween. Similarly, the variable speed drive mechanism and a rotatable control member which is rotatably driven through frictional engagement with the advancing strand, drive digital signal generating devices, the signals of which are compared and used to produce an overriding fine analogue control signal representative of any difference between them. The coarse and fine analogue control signals then are combined to produce a signal for controlling the speed of the variable speed drive mechanism, and thus of the printing wheel mechanism.
Inventors: | Minehart; Robert F. (Phoenix, AZ) |
Assignee: |
Western Electric Company, Incorporated
(New York,
NY)
|
Appl. No.: | 04/779,120 |
Filed: | November 26, 1968 |
Current U.S. Class: | 101/37 ; 101/248; 101/74; 226/42 |
Current International Class: | H01B 13/00 (20060101); H01B 13/34 (20060101); B41f 017/10 (); B41f 013/12 (); B65h 023/18 () |
Field of Search: | 101/36,37,219,226,227,228,248,181,73,74,75 226/29,30,42 242/75 318/6,7,329,(Inquired) |
2169016 | August 1939 | Baker |
2739528 | March 1956 | Lowe |
2963555 | December 1960 | Brubaker |
3165056 | January 1965 | Heatley et al. |
3288336 | November 1966 | Smith |
3324363 | June 1967 | Hill et al. |
3487986 | January 1970 | Nelson et al. |
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