Patent GB-1055105-A (GB)
Title: Control system for controlling movements of a carriage along automatic spinning machines
IPC: D01H9/10
Filed: 1964-04-06
Abstract: 1,055,105. Track apparatus. TOYODA AUTOMATIC LOOM WORKS Ltd. April 6, 1964 [April 5, 1963], No. 14086/64. Heading B7N. [Also in Division D1] A carriage having an automatically operating device, e.g. a bobbinexchanger, for use with spinning machines, moves on guide rails to one of a number of spinning machines when a call-switch appropriate to that machine is operated, the carriage including a pair of starting relays with means for preventing one relay from becoming operative when the other is energized. In Fig. 1, a . . . d are spinning machines each with a normally-open call-switch 15a . . . 15d and 2 is a carriage having bobbin-exchangers 3, 3<SP>1</SP> movable along rails 1, 1<SP>1</SP>. Rail 1 is subdivided, the sections 1a . . . 1d being electrically interconnected by normally-closed microswitches 4a . . . 4d. The call-switches are automatically closed when the associated machine is ready for doffing: the carriage is shown servicing machine d to which it has moved in response to the closing of switch 15d which has energized a relay 17d to operate a stopswitch 27. The carriage has wheels 5, 5<SP>1</SP>, 6, 6<SP>1</SP> which are insulated from their axles, and starting relays 10, 11 which when energized respectively cause the carriage to move forward or backward and are isolated from one another while the carriage is at one or other of the machines by a projection on the carriage which opens the corresponding switch 4a . . . 4d. When the servicing of machine d is complete, the stop switch 27 is automatically reopened, and if a call-switch, say 15a, is closed involving forward movement of the carriage, relay 11 is energized, a circuit being established through the relay from conductor 13 via switch 15a conductor 12a, the intervening switches 4a . . . 4c and the rail sections, rail 1<SP>1</SP> and conductor 18. As will be explained, the energization of relay 11 causes the carriage to move forward until it encounters a lug 17a which has been caused to project by the energization of relay 16 on closure of switch 15a, the lug operating the stop switch 27. The carriage is now opposite machine a, and lug 17a also starts a motor which rotates a threaded shaft 62 to move a block 64 so that rails 66, 67 carried thereby engage rails 68, 69 on the machine and terminals 75, 77 engage terminals 72, 74 to supply a motor for moving forward and operating the bobbin exchangers 3, 3<SP>1</SP>. When the engagement is complete, a microswitch 70 is engaged by a lug 71 to stop rotation of the shaft 62. A projection 80 also engages a time switch 81 to energize a relay 79 controlling the supply of current to the terminals 72, 74. When the bobbin-exchange is completed, the exchangers 3, 3<SP>1</SP> return, closing a switch 82 to drive the shaft 62 to return the rails, until lug 71 closes a switch 83 to stop rotation of the shaft. Fig. 2 shows the circuits for driving the carriage forwardly or in reverse to machines to the left of d (not shown) by connecting a motor 33 to a supply 22 of direct current upon energization of one or other of the starting relays 11, 10. The rail circuits described above for engaging relays 10, 11 are respectively represented by contacts A and B. Contacts 28, 28<SP>1</SP> are protective contacts operated by movement of the rails 66, 67 and with contacts 20, 21 and 38, 39, act to prevent the carriage being called another machine while it is servicing one of the machines. Contacts 44, 46 and 30, 32 are controlled by windings 42, 25 which are respectively energized when relays 11, 10 are energized and serve to connect the motor 33 for forward or reverse drive to the source 22. Thus, when circuit A is established relay 11 is energized and with contacts 28, 28<SP>1</SP> and the stop-contact 27 closed, a circuit is established to energize winding 42 and close contacts 44, 46.