Patent GB-190803247-A (GB)
Title: Improvements in or relating the Machines for Inserting Fasteners or the like.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-02-13
Granted: 1909-03-15
Abstract: 3247. Boult, A. J., [United Shoe Machinery Go.]. Feb. 13. Nailing.-Relates to detail improvements in loose nailers and like machines, whereby they may be run at a much higher speed than is usual, and consists, firstly, in the provision of a fastener-receiving throat located, when in the operative position, in the work-feeding path of the awl, and movable transversely of this path when the feed takes place ; secondly, in arranging the f a s t e n e r-receiving throat and the separator so that they are actuated by the same means, simultaneously if desired ; thirdly, in a timing of the parts so that the driver receives a halt during its upward movement, to prevent the endmost fastener from falling out of the raceway after the separator has been withdrawn ; and fourthly, in the provision of a lip on the fastener-receiving throat for supporting the endmost fastener as it is separated after being released by the driver, and before the opening in the throat comes beneath it. Fig. 3 shows a general view of the head of the machine. The driver-bar 16 is reciprocated by rack and segmental gear actuated from a cam 30 on the main shaft. The nails are stored in a continuously rotating hopper, and gravitate down a raceway 48, Fig. 7, to a separator 50. Figs. 4, 5, and 7. This separator is carried at the lower end of a spring-pressed pivoted lever 52, and is adapted to pick off the foremost nail &c, and force it into the adjacent portion 58 of the driver passage. From here, the nail &c. falls into a throat 60 secured to a slide 61, which is coupled up to a cam on the main shaft, so that it is reciprocated transversely of the raceway. A link 76 connected to an offset on the throatactuating lever 62 is connected by a pin and slot to the lever 52. Fig. 12, however, shows a preferred arrangement, in which the separator is connected to a member 520 adjustable transversely of a slide 530 mounted on the throat-actuating slide 61. In this arrangement, the throat and separator move normally together in both directions, and provision is made for the separator to yield if it contacts with a misplaced nail &c. When the throat and separator move backwards to allow the feed of the work by the awl, the foremost nail &c. is prevented from falling into the driver passage by arranging a pause in the upward movement of the driver. When the separator comes forward again and engages between the last two nails, the driver completes its upward movement, and the foremost nail &c. drops into the driver passage. The opening in the throat, however, is not then in alinement with the driver passage, and, to prevent the nail &c. from falling down in front of the throat, the throat is provided with a projecting lip 73 on which the point of the nail &c. rests.. The awl 75, Fig. 5, is carried by an awl bar 74 mounted in a swinging frame, which is actuated by one cam on the main shaft to cause the awl to pierce the work, and by another cam to effect the feed. The work is supported on a horn 92, Fig 3, which may be of usual construction, while the starting and stopping clutch mechanism may be similar to that described in Specification No. 9828, A.D. 1897.