GB593578A - Apparatus for controlling periodically operating machinery - Google Patents
Apparatus for controlling periodically operating machineryInfo
- Publication number
- GB593578A GB593578A GB1161844A GB1161844A GB593578A GB 593578 A GB593578 A GB 593578A GB 1161844 A GB1161844 A GB 1161844A GB 1161844 A GB1161844 A GB 1161844A GB 593578 A GB593578 A GB 593578A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roller
- control film
- photo
- lines
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/12—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers
- G05B19/124—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers using tapes, cards or discs with optically sensed marks or codes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
593,578. Reversing gear. LOEWY ENGINEERING CO., Ltd., and FERNBACH, H. R. June 19, 1944, No. 11618. [Class 80(ii)] [Also in Group XL] In a photo-electric control system in which a control film 20 carrying a series of lightinterrupting lines 21 extending across the film as shown is moved through a photo-electric device to control a periodically operating machine (see Group XL), an electro-magnetic reversing mechanism is provided to reverse the direction of movement of the control film when the last of the series of lines has passed through the photo-electric device. The control film 20 is paid out from a roller 18 driven through the reversing mechanism from a feed roller 14 of the controlled machine. The reversing mechanism comprises two clutch halves 33, 34 running loosely on the shaft 32 of the drive roller 14, and an armature 31 keyed on said shaft so as to slide into engagement with one or other of the clutch halves 33, 34, which contains windings 35, 36. The clutch halves are geared to the shaft 37 of the roller 18 through gear trains 38, 39 and 40, 42, the latter containing an additional gear element 41. To ensure that, after the stoppage of the control film 20 when the last of the series of lines 21 has passed the photo-electric cell, the control film will be in the correct position for the start of the return movement, the roller 18 winds to a certain tension a coiled spring 43, a reversing mechanism 44 similar to that previously described and a slip clutch 46 being interposed between the roller 18 and the spring 43. The electro-magnetic clutches of the two reversing mechanisms are operated simultaneously and the arrangement is such that the tension of the spring 43 always opposes the feed movement of the control film 20. By this means, as soon as the drive for the control film stops, the spring 43 returns the film 20 to a position in which the last of the series of lines 21 is in the beam of the photo-electric device.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB593578A true GB593578A (en) | 1947-10-21 |
Family
ID=1710574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1161844A Expired GB593578A (en) | 1944-06-19 | Apparatus for controlling periodically operating machinery |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB593578A (en) |
-
1944
- 1944-06-19 GB GB1161844A patent/GB593578A/en not_active Expired
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