Patent GB-191516398-A (GB)
Title: Improvements in or relating to Pulling-over Machines.
Inventor: RICKS FRED
IPC: A43D75/00
Filed: 1915-11-20
Abstract: 16,398. Ricks, F. Nov. 20. Lasting and pulling-over.-In a pulling-over machine of the class in which the last, during the pulling-over, is positioned in the machine bottomdownwards, and in which mechanism is provided for bringing fasteners into position point-upwards below the last-bottom, means are provided for effecting the inversion of separated fasteners by puffing them through a passage of such form that the fastener commences its journey point-downwards, but is delivered at the end of its journey point-upwards. The invention is described as applied to a pulling-over machine of the kind described in Specifications 7005/00, 7247/01, 19,093/ 02, 12,304/03, 20,140/06, 6827/07, 1866/12, and 14,311/13, but modified so that the work is in the position indicated in Specification 4236/07. In the machine as thus modified the main cam shaft D, Fig. 1, is arranged vertically, the customary column and sleeve are removed, and the trip, brake, and friction-clutch operating parts are so modified that only a starting-treadle X<56> projects to any distance to one side of a vertical plane through the heel rest in its inoperative position. The usual long brake trip is replaced by a short rod X<56> connected by a lever X<83> to the treadle, which, when depressed, causes the wedge end of the rod, in the usual manner, to allow a spring member to draw off the brake shoe 982 from the pulley 986 and to draw rearwardly of the machine a short brake-shoe rod X<84> coupled to one end of a lever X<85>; this lever acts through a rod 984 to operate a friction clutch controlling the drive of a pulley belted to the pulley 986. The up-draw levers of the grippers are provided with swan-neck extensions 158 to bring them into a convenient position above the work, and with the grip e<2> of the front up-draw lever more or less between those of the side levers; a lever 226<1> for opening the front pincer is mounted on the grip c<2> and connected by a link 226<11> to the usual opening-lever handle 226. The tacks from the hopper 400 are separated from bulk in the usual manner, but the diameter of the rounded end of the notch 568, Fig. 5, of the separator 558 is reduced so that the head of the tack cannot pass through the notch. A blast of air is then directed through a pipe c on to the tack to raise it out of the notch and direct it into and through a duct n, which is so curved that the tack drops out of the duct point-upwards into a pocket of a transferring-plate, which is actuated as described in Specification 103,349. The ducts n are supported just above the separator in a bar l, Fig. 7, through which are apertures registering with apertures in blocks o, which can be swung aside when tha raceway covers 439 are lifted for tack-clearing purposes. The air blast from a supply pipe c<1> to the pipe c, Figs. 1 and 2, is controlled by a cock, the plug d of which is connected to a hub d' having two teeth at opposite ends of a diameter to be engaged by mechanism so that the air supply will be opened and shut at the end of the second half-cycle of operations of the machine. This mechanism comprises a pawl mounted on a carrier d' rigid with a pinion f gearing with a spring-controlled rack-bar g, which is moved to the right, Fig. 1, in the first half-cycle of operations of the machine by an arm g<3> connected to one of the up-draw tension-spring studs g<Î>. In the latter portion of the second half-cycle of operations, as the arm g<3> returns, a wedge g<4> upon it depresses a spring pawl g<5> out of the path of a head g' on the rack g, which is then moved by its spring g<1> to open and shut the cock; this movement is retarded by a dash-pot g<6>. Alternatively, the air supply may be derived from a pump, the piston of which is operated to compress and discharge the air in each cycle of the machine, as described in Specification 670/15.