US475417A - Nailing-machine - Google Patents

Description

(No'Model.)

P. F. RAYMOND, 2d. NAILING MACHINE.

No. 475,417'. Patented May 24, 1892.

EINE

UNITED STATES PATENT OFFICE.

FREEBORN F. RAYMOND, 21.), OF NEWTON, MASSACHUSETTS.

NAlLlNG-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 475,417, dated May 24, 1892.

Application tiled .Iuly 27, 1889. Serial No. 318,946. (No model.)

.To all whom it may concern:

Be it known that I, FREEBORN F. RAYMOND, 2d, a citizen of the United States, residing at Newton, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Nailing-Machines, of which the following is a full, clear, and eX- act description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates especially to a nailing-machine having a nail-carrier provided with holes enlarged at their upper ends and through which the nails are driven by a gang of drivers, with the said gang of drivers and a driver-centering device comprising a plate having a teat or projection,preferablyfor each hole of the carrier, of a size to enter or partially enter the same and hold the driver in a central or substantially central position in relation to the hole during its operation.

In nailing-machines employing a nail-carrier having enlarged holes and through which the nails are driven by the drivers it happens occasionally that a nail may notrleave the hole of the carrier or may become so tipped or canted in the hole that a driver upon entering a hole instead of striking the head of the nail runs alongside of it and becomes wedged between its surface and the surface of the hole and of course prevents the driving of the nail and breaks the driver, and it is to avoid this liability that I have made the herein-described invention. Ilt is represented as applied to a heel-nailing machine; but I would say that it may be used in any nail-driving machine, whethera gang-nailing machine or a single-nailing machine, where a carrier is used having one or more enlarged holes through which the driver or drivers are reciprocated in driving the nail.

In the drawings, Figure l represents a view, part in section and part in elevation, of the central and upper parts of a heelenailing machine having the features of my invention. Figs. 2, 8, 4, and-5 are detail views to which reference is hereinafter made.

In the drawings, A represents the last or work support; a, a shoe mounted thereon; B, a templet having the holes h, through which the nails are driven; C, the nail-carrier; D, a

reciprocating head carrying a block d, sup porting the drivers d. The nail-carrier O has the holes c for receiving the nails. These holes are represented at their lower ends as reduced in size to the size of the holes b of the templet B, and are represented as enlarged at their Lipper ends, preferably by the long taper c'. It is advantageous to provide a nail-carrier with holes of this shape when the nails are fed to it automatically from a set of distributing tubes or passages, and especially when the nail-carrier O is provided with an automatic movement from the nail-distributer to the nail-driving devices and must be moved to bring its holes first in register with the holes of the nail-distributer and then with the holes of the teinplet and with the drivers. By thus shaping them an absolutely perfect registration of the holes of the carrier with the holes of the distributer is not absolutely essential. Vhen, however, holes of this shape are used. there is a slight liability of a nail not dropping from its hole into the hole of the templet when it is brought into register therewith and also of the driver not striking the head of the nail, but passing alongside of it between it and the side of the hole, and this is caused, of course, by the hole at its upper end being considerably larger than the head of the nail. To prevent this liability, I have secured to the driver-block d a plate d2, which is secured to the driverblock d to be movable vertically by guidepins d3. (See Fig. 3.) This plate has holes d4 for the drivers cl', and when in its normal position is held from the driver-block d by the spring d5. (See Fig. l.) This plate also has extending from its under surface a teat or projection d@ about each driver-hole. This teat or projection is of a shape to enter or partially enter the upper ends of the holes c, and by so doing two results are obtained: first, if the teat is made of sufficient length it comes into contact with the head of the nail and starts it down; second, it centers the end of the driver in relation to the hole, so that the driver is caused to enter the hole centrally, and is so held during its downward movement through the hole. Consequently it is held so as to strike the head of the nail, even if the nail is canted in the hole. In other IOO words, it cannot enterthe space between they side of the nail thus held in the hole and`the side of the hole. n

In operation upon the downward movement of the head D the teats or projections arel caused to enter the upper ends of the holes, and being conical or tapering `in shape they* automatically center the plate and the ends of the drivers which, the said plate comingi to rest, immediately move through the holes in said plate and centrally through the holes c of the nail-carrier, and upon the upward. movement of the head D the plate d2 is re` turned toits normal position by the springs d5# A plan view of the plate is represented in Fig. 2 and a plan view inverted in Fig. 5. In` Fig. 4 the plate is represented, as well as a part ot the arm of the head, showingtheguide, piu as movable in holes in the head.

It is obvious that the invention is applica-1 ble to a machine usinga single driver, as well.; as to a machine using a gang orgroup of dri.`

vers.

It is obvious that where the invention is` used in a machine having a gangof drivers it is not essential that the guide-plate d2 have :4

as many teats or projections d5 as .there are holes 1n the nail-carrienalthough this isthe. betterform of constructiomor that-theyeven:

enter said holes, so long as they enter holes which serve to hold the platein such relation to the holes ofthe nail-carrier that all its holesf are centrally located in relation thereto, so. that the drivers are caused to enterrthe said; holes centrally. Y

This improvement is especially valuable in? automatic machines where the nails are fedl by a nail-carrier to a templet and the drivers. immediately reciprocated,lthere being no appreciable time between the instant that ther holes of the nail-carrier come into position.` beneath the drivers and the operation of the drivers because it is desirable for certain reasons that the holes of the nail-carrier be enlarged at their upper end. The ends of the drivers cannot be larger than the smallest section of the said holes, the nail-carrier coming into position rapidly and the drivers following so quickly the nails do not always leave the holes of the nail-carrier, and there `is `a possibility, unless the drivers are held I claim and desire to secure by Letters Patent `plate, enlarged at its or their upper ends, with one or more drivers and a driver-guide controlled as to its position by said nailearrier, substantially as described.

2. The combination of a nail-carrier having holes c enlarged at their upper ends, the gang of reciprocating driversd the independentlymovable guide-plate d2, having holes for the drivers and one or more teats or extensions for centering the guide-plate and the ends of `the drivers in relation to the upper ends of the holes of the carrier, substantially as described. p

FREEBORN F. RAYMOND, 2D. Witnesses:

J. M. DoLAN, E. P. SMALL.

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