Patent GB-190828070-A (GB)
Title: Improvements in Apparatus for Moving the Embroidery Frame of an Embroidering Machine.
Filed: 1908-12-24
Granted: 1909-12-23
Abstract: 28,070. Vogtlandische Maschinenfabrik (vorm J. C. & H. Dietrich) Akt.-Ges. Dec. 24, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Embroidery machines.-The embroidery frame is operated through rack gear by shafts 69, 70, Figs. 1 and 2, which are varyingly operated as determined by the perforations in the jacquard-card. The mechanisms for actuating the shafts 69 and 70 are exactly alike, and the former only will be described. The general operation is as follows :-A plate 16, Fig. 4, is moved along an arcuate path in the edge of an arm 23, Fig. 1, by a lever 10, until a spring- pressed pin 18 falls into a hole in the jacquard-card or sheet. The resistance offered by the hole is sufficient to overcome the frictional drive of the lever, and the plate 16 is stopped. The upper part of the plate, which is bent over horizontally, is clamped between the arm 23 and a block 24 by the rotation of an eccentric shaft 25 passing through the block. A lever 37 is rocked upon its pivot 36, which is the centre of the path of the plate 16, until a pin 41 in the arm 39 of the lever strikes the plate 16, which offers a resistance to the frictional drive of the lever sufficient to stop it. A bolt 38 at the elbow of the lever which slides in an arcuate slot 40, in a lever 58 is clamped in position in the lever by the rotation of an eccentric roll 55, converting the lever 37. into a connecting-rod between the lever 58 and the sliding frame 84, 85. The lever 58, which has during , these movements remained stationary, is rocked and a. longitudinal movement is imparted to the lever 37 as determined by the distance from the rocking centre of the lever at which the bolt 38 is clamped. This movement is communicated to the shaft 69 by one or other of the surfaces 84, 85 as determined by the rotation of an eccentric 86, which presses one or other of them on to the periphery of the friction disk 83. The direction of rotation of the eccentric is determined by perforations 101 acting through one or other of the alternative linkages in the mechanism shown in Fig. 11. By altering these linkages, the four dispositions of one pattern, Fig. 13, can be produced from one jacquard-card. In the detailed application of these devices, the lever 10 is driven by the friction between its boss and the spring-pressed surfaces 11, 12 which rotate with the shaft. The plate 16 carries an horizontally projecting pin by which the forked end of the lever 10 moves the plate. The end of the lever 10 is bent downwards and forked so as to engage all horizontally projecting pin on the plate 16, thereby enabling the lever which is pivoted at 8 to move the slide along a path concentric with the pin 36. The eccentric clamping-shaft 25, Fig. 4, is rotated by a cam-actuated rod 33 through a lever 29, a spring 30, and a lever 28. Thepin 41 is lowered in the end of the lever 37 to contact with the stopplate 16, and is raised, after the bolt 38 is clamped, by a segmental plate 44, Figs. 4 and 5, which engages a slot in the pin, and is secured to move with the lever 29. After the pin 41 is raised out of the path of the plate 16, the lever 29, continuing in its movement, contacts with the lever 28, rotates the eccentric clamping-shaft, releases the plate 16, and permits the lever 10 to carry the plate back to its initial position. The lever 37 is rotated by the frictional contact of the leather-covered prongs of a forked arm 95 of the lever with a cam-actuated reciprocating bar 98. The eccentric 55 is rotated by a spring 61 so as to lock the bolt 38 in position excepting during the dwell in the movement of the lever 58, when a lever 91 is depressed into contact with the arm 59 and rotates the eccentric in the reverse direction. An arm 92 of the lever 91 at the same time contacts with a projection 93 on the lever 37 and ensures that the latter moves into its normal position in line with the centre of the shaft 45 of the lever 58. The rotation of the eccentric 86 is controlled as follows :-A cam-operated lever 126 engages, as determined by the holes 101 in the jacquard-card, one or other of the pitmans 128, 129. The pitman 128 is connected to one arm of a three-armed lever 112 and the pitman 129 to a bell-crank lever 113. These levers are connected by the lower arms of a plate having a third pinhole 123. The pitman 124 by means of which the eccentric is rotated is coupled by a joint pin with either the hole 118 in the lever 112 or the hole 123 in the connecting-plate. The two pitmans 128, 129 are held together by a spring 131, and the former is jointed to a bar 111. A spring 133 tends to hold the pitman 128 against a cam-actuated lever 116. The lever 126 is operated when the lever 116 is in its extreme left position, so that, unless the pitmans are hindered from following the lever 116, the pitman 129 will always be operated. But a stop 102, when a perforation in the card comes over it, passes through and is raised above the surface of the card and stops the bar 111, so that the pitmans are unable to follow the movement of the lever 116, and the pitman 128 is coupled to the lever 126. The stop 102 is raised by means of a lever 106 which is operated by a lever-end 108 (viewed end-on in Fig. 11), in the direction to lower the stop positively, and in the direction to press the stop upwards through the intermediary of a spring 109. When, therefore, the stop 102 finds a hole in the card, the pitman 128 is coupled to the lever 126, and the frame 84, 85 is pressed in one direction to bring one of the slides into contact with the disk 83, and, when the stop meets the solid card, the pitman 129 is operated and the other slide in the frame 84, 85 contacts with the disk. When the pitman 124 is coupled to the lever 112, the operation of the pitman 29 brings the slide 84 into action, and the operation of the pitman 28 the slide 85, and vice versa when the pitman 124 is coupled to the plate 123. Assuming the pattern, a, Fig. 13, to be the normal one with the coupling- pins in each mechanism at 118, then by changing the pin in the mechanism for horizontal movement only to 123, the pattern b is produced ; by changing the pin in the mechanism for vertical movement only to 123, the pattern d is produced, and by changing the pins in both, the pattern c is produced.