US340540A - Boot or shoe nailing machine - Google Patents

Description

(N5 Model.)

H. S. BACON.

BOOT| OR SHOE MAILING MAOHINB.-

Ptelanted Apr 27, 1886 TK IX.'

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HENRY S. BACON, OF MILFORD, MASSACHUSETTS.`

BOOT OR SHOE NAILING MACHINE.

SPECIFICAI'ION forming part Of Letters Patent NO. 340,540, lated April 27, 1886.

Application filed August 29, 1885. Serial No. 175,609. (No model.)

To @ZZ whom it may concern.:

Be it known that I, HENRY S. BACON, of Milford, county of Worcester, State of Massachusetts, have invented a certain new and useful Improvement in Boot or Shoe Nailing Machines, of whichthe following is a full, clear, concise, and exact description, taken in connection with the drawings accompanying and forming a part hereof, in which- Figure l is a side elevation of a nailingmachine. Fig. 2 is a vert-ical central section of my improved gripping device. Fig. 3 is a section on line .fr m, Fig. 2. Fig. 4 is a section on line y y, Fig. 2, Fig. 5 is a plan, and Fig. 6 is a section, of the operating-cam.

It is desirable in boot or shoe nailing ma chines in which the stock is supported by a horn that the horn should drop a given distance from the lower surface of the stock during the feed movement, and that this distance be constant whether the stock be thick or thin, and that the machine automatically adjust itself to obtain this result in passing from stock of one thickness to stock of a dii'ierent thickness.

The object of my invention is the construction of a simple mechanism to obtain these results, which may be applied to any nailingmachine employing a horn, and it consists in the following described mechanism.

The accompanying drawings show my invention as applied to one form of nailingmachine familiar to those skilled in the art. I shall conne my description, however, to those parts of said mechanism illustrated in the accompanying drawings which are essential to an understanding of my present invention.

A is the main shaft of the machine, to which a cam-wheel, B, is secured, having a cam-path, a, cut in his face. This cam is connected with the horn-post C, through the treadlelever D and connecting-rod E, and it will be clear that if the connecting-rod E were actuated directly by the cam B the horn would be lowered by the throw of the cam at each revolution of the cam-wheel.

The mechanism which I have'constructed to eii'ect the objects above set forth is interposed between the upper end of the connecting-rod E and the short rod F, which is connected directly with the cam-wheel B. This mechanism is shown clearly in Figs. 2, 37 and 4 of the drawings, and consists of a block, G, secured to the standard of the machine, and provided with a vertical groove in its face adapted to receive the block H, which slides therein. The block I is secured to the block H by screws d, and has a vertical rectangular slot passing through it, as shown, Fig. 4, which receives the rod F, the linksf, and link-block l1., and the upper end of connecting-rod E, as shown, Fig. 2. To the blocks I the guidepieces K K are secured by screws k. (See Fig. 3.) The rod F passes through slots in these guides, and is thereby held in position and prevented from lateral movement. The links f are pivoted at one end in slots in the rod F, as shown, Figs. 2 and 3, and at the other in slots in the link-block h. (See Fig.2.)

If the rod F is moved upward by the action of the cam, the links f are brought toward a horizontal position, forcing the link-block away from the rod F and against rod E, firmly grippingthe same, and the further upward necting-rod E and all the parts of the device secured to and which slide with block H.

To insure against the upward movement of blocks H and I with rod F before the linkblock h has gripped rod E, I provide the spiral spring j, secured at one end to block G and at the other end to block I. This spring presents snfiicient resistance to the upward movement to overcome any sticking of rod F to block I. A pin, a, is set in this stationary block G, and projects into the slot m, cut in the lower end of block H. When the linkblock has released rod E, the sliding-block H will drop downward until pin u strikes the upper end of slot m, when it is prevented from further downward movement, and is held ready for the next revolution of the cam.

If stock of varying thicknesses -is put on the horn, it will affect the height at which connecting-rod E will stand in the gripping device; but the action of the cam B will cause the gripper to seize the rod at whatever height the rod is, and, after it has seized it, the throw of the cam being constant, the downward movement of thchorn from the point at which it stands when the gripper seizes rod E will also be constant, and as this point depends upon the thickness of the stock directly above movement of rod F carries upward the conthe horn at the time, the device acts automatthereto and to the short rod, and the sliding ically. block I, all arranged substantially as and for What claim is,M the purpose set forth. In a boot and shoe nailing machine, the HENRY S. BACON. 5 combination, with the horn-post, its lever, and itnesses:

connectingmod, of the short rod F and the WVM. A. MACLEOD, actuating-cam, the block h and links f, pivoted l ROBERT XVALLACE.

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