Patent GB-190006593-A (GB)
Title: Improvements in Hob Nailing Machines for Boots and Shoes.
Inventor: DORMAN WILLIAM HENRY
Filed: 1900-04-09
Granted: 1901-03-16
Abstract: 6593. Dorman, W. H. April 9. Nailing.- Relates to improvements in the machines for inserting hob-nails described in Specifications No. 23,363, A.D. 1895, and Nos. 19,654 and 20,708, A.D. 1898. The machine is driven by a belt. on a loose pulley, which is put in gear by a friction clutch operated by a treadle. The machine is stopped always in the same position by a brake operated . by a cam. The nails are contained in, and delivered from, a pair of cylindrical hoppers, which are rotated, simultaneously or one at a time, by belt gear from the main spindle. By means of a handle a<1>, Fig. 4, actuating a twoarmed lever d<9>, either hopper can be stopped, its belt pulley b<4> or b<5> being thrown out of gear. From the hoppers the nails pass down a pair of raceways to a pair of carriers, either of which can be put into operation by means of a spring-locked hand-lever. A cam on the main spindle rocks a shaft e<4>, Fig. 6, carrying a lever e<7>. This lever by means of gab links is connected to one or other of the toothed levers e<13> and e<15>, which actuate the carriers through the spur gear shown. The carriers are of the type described in Specification No. 23,363, A.D. 1895, and the raceways are provided with shutters as described in Specification No. 20,708, A.D. 1898. The driver-bar is magnetized, and reciprocates in a non-magnetic sleeve. It is raised by a cam g', Fig. 12, against springs, its drop being limited by an adjustable collar. After it has been raised, and a nail brought under it by the carrier, it is lowered to pick up the nail, and is again raised and held in this position by a second cam g<14>. When the part g<17> of this cam clears the projection g<15> on the bar, the latter drops, and drives a nail. At the lower end of the driverbar is secured a nose-piece, as shown in Fig. 15. When the bar descends to pick up a nail, the jaw i is opened to receive the nail-head. This jaw is held in any position by a friction washer adjusted by the screw on which the jaw is pivoted. Shou'd the nose-piece be driven up the bar in the act of driving a nail, it is returned to its original position by the part i<3> coming in contact with an adjustable stop. The driver-bar may be turned on its axis to place the head of the nail at any desired angle by a rack-bar h<5>, Fig. 12, gearing with a toothed ring clamped on a feathered bush or sleeve through which the bar moves. This bar is actuated by a cam h and a lever. The work is fed forward by a foot k, Fig. 9, attached to a lever k<1> which is rocked about a centre k<2> by a cam k<3>. A pin k<4> on the lever projects through a slotted bush k<5> in the frame. The direction of the slot can be adjusted to control the movements of the foot. The centre k<2> is adjustable by the rack-and-pinion gear shown to regulate the amount of feed given to the shoe. The centre k<2> is connected by a rod m to a locking-device for the rack h<5>, so that the latter is held stationary when the movement of the feeding-foot is large. The foot is hinged at o to facilitate its return movement. Means are provided, as shown in Figs. 1, 20, and 23, for adjusting the inclination of the work. The jack is carried by a block n<3>, pivoted to the stem n' at n<4>, and adjusted by an eccentric pin n<5> rotating in a block movable in the slot shown.