Patent GB-526794-A (GB)
Title: Improvements in electric jacquard mechanism
IPC: D03C3/20
Filed: 1939-06-09
Abstract: 526,794. Lace machine jacquards. BROMLEY, J. H. June 9, 1939, No. 16967. [Class 74 (i)] [Also in Group IX] In a jacquard for controlling the jacks of a curtain lace-machine electrically, interchangeable mechanism is provided as part of the control apparatus to effect changes in the number of breadths of lace to be worked simultaneously. This interchangeable mechanism is provided in units, each wired to correspond to the working of a certain number of breadths. If it is desired to change the machine from working, say, 6 breadths to working 9 breadths, the appropriate unit for 9- breadth working is substituted for the 6-breadth unit that is already in place. The jacquard is generally similar to that which is described in U.S.A. Specification 1,066,789. Fig. 7 shows diagrammatically, a section of a lace machine provided with electrically controlled jacks 1, each of which is connected by a jack rod 2 stepped at 3, 4 to a stop 5. Each stop consists of two parts 5a, 5b associated with solenoid coils 6a, 6b. The coil 6a provides a full fift for the upper part 5a of the stop 5 into the path of the abutment 3, while the coil 6b provides for the half lift of the lower part 5b into the path of the abutment 4. The solenoids are connected at 7 with a battery 8 and at 19, 20, through various contacts 23 ... 26 and 13, 14 with needles 11, 12 of a jacquard. Connection between the fulllift primary terminals 17, 18 and the secondary terminals 21, 22, carried by a secondary terminal board B is made through a readily removable and interchangeable division unit C. The contacts 23, 25 of the unit 6 are connected within the unit by a wire 27, while a wire 28 similarly connects contacts 24, 26. Each contact 23, 24 has connected to it a number of wires 27a, 28a, the number depending upon the divisional split for which the particular unit C is wired. Each one of the wires 27a, 28a, is connected to a different secondary contact 25, 26. Thus, assuming the unit C to be hooked up for 6- breadth working, each time the needle 11 is operated to close the circuit through contact 13, wire 15, terminal 17 and primary contact 23, that circuit will be split six ways from the contact 23 to six individual secondary contacts 25 and thereby will complete circuits through six secondary terminals 21, wires 19 coils 6a and wires 7 to the battery 8. The unit C consists of a frame 34, with spaced terminal boards A', B' and can be removed and another set in its place. A jack screw 45 or other power device is used for separating the contacts on boards A<SP>1</SP>, B<SP>1</SP> from those on boards A, B. Board B is held in place by bolts and screws 39 while the board A is mounted in a frame 40 having feet 42 slidable in a rail 36. To effect a hook up, a unit C of desired division having been placed between the terminal boards A, B, the jack screw 45 is rotated by turning handwheel 46 to advance the frame 40 until the contacts of the terminal board A engage the contacts of board A'. Further rotation of the screw slides frames 40 and 34 along until the contacts in boards B<SP>1</SP>, B register. Further rotation consolidates the engagement between all contacts and brings faces 55 ... 58 into firm contact. If the screw is turned in the reverse direction, the frame 40 first separates and then the unit C is pulled away by the aid of hooks 52. These are eventually tripped by pins 55, to permit the unit C to stand while frame 40 moves on to position shown in Fig. 2. The device can be used with any apparatus where a large number of elements are to be divided into groups, wherein the groups are subject to change as to numbers in each group and wherein the groups are to be controlled from a single source.