US1514403A - Nail-driving machine - Google Patents

Description

J. J. STEPANEK NAIL DRIVINQ MACHINE Filed Feb. 7. 1 924 it Sheets-Sheet l Patented Nov. 4:, i924.

JOSEPH J1 STEPANEH; 01E TABQE, SUYUTH DAKOTA.

NAIL-DRIVING EEACI'IINE.

Application filed February 7, 1924; Serial No. 691,311.

lowin to be a full clear and exact descri a 7 tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to nail driving machines and'it has for its object to provide aneutremely cheap and simple apparatus that will hold a maximum number of nails to'be successively driven, the feeding of the nails to the driving plunger being effected and controlled by a finger of the same hand of the operator that manipulates the apparatus.

In the drawings:

Figure 1 is a side elevation of a machine embodying the present invention.

Figure 2 is a top plan view ofthe machine.

Figure 3 is a vertical section through the driving plunger and its casing, the feed slide and its mounting being also shown.

Figure 4 is a detail perspective view of the feed member.

Figure 5 is a transverse section on line 55 of Figure 3.

Referring to the drawings there is shown at the body of the machine, which may be made of metal or any other desired material and at the rear end of which is the vertical handle 11 that provides for carrying the machine about and for manipulating it in use. The upper por ion of the body is en larged and is provided with a magazine 12 at its top, to receive the nails. The bottom of the magazine is provided with a plurality of parallel slots 13 into which depend the nails, whose heads are within the magazine. Guide ways 14, with which the slots communicate, extend from the magazine forwardly of the machine and lead, through the medium of connecting passages, to the main guide way or passage 15 which extends forwardly and downwardly to the feeding machine to be presently described. The guide ways, exterior to the hopper, are provided with cover plates 17, that are mutually connected as a matter of strength, and are connected to the front of the hopper.

The forward end of the body has mount ed on its tubularcasing ls'which-extends from the bottom face of the body to a point considerably thereabove and this casing is slit longitudinally from near its upper-end, through its bottom end, the slit communicatingwith the main guide way 15 so that' the nails'as the I pass down this guide way will be successively precipitated from it into the guide way, with their pointed ends downwardly.

iVithin the casing 18 is-sli'dably mounted a driving plunger 19, having an enlarged read 20- at its upper end. A helical spring 21 upon this plunger andbearingwith its ends against the top, ofthe-casing1and the under side of the head, holds the plunger.

yieldably raisedand returns it when released after depression. Upward movement of the plunger is limited by the pin 22 that is passed diametrically through it and the ends of which play in the opposite slots 22 of'thecasing.

Th helical spring; holds the plungeinn0r=- mally in such position, that the nails may successively pass into the casing beneath the plunger, after which, a blow upon the top of the plunger head, serves to force the plunger downwardly against the nail and to drive the latter home.

To feed the nails successively from the main guide way 15 into the casing 18, a table is provided comprising the guide arms 25 and 26 that extend oppositely from the forward end of the body and which overlap the casing 18. The longitudinal edges of these guide arms are folded upon themselves, as illustrated and slidably engaged beneath these over-folded portions of the guide arms, are the plates 27 and 28 that are provided with fingers 29 and 30 respectively that are directed toward each other, the two plates 27 and 28 being connected together by an arch plate 31, as illustrated.

The finger 30 is of greater width than the finger 29 and its free end is beveled so that its longitudinal edge that lies in the direction of the casing, is shorter than its rear longitudinal edge. The finger 29 has its front longitudinal edge set slightly rearwardly of that of the finger 30. When these two plates are reciprocated on the guide arms, thebeveled face of the finger 30 engages the lowermost nail which at that time is in position against the rear edge of the finger 29, the point of the finger 30 having entered behind the nail. Then as the plates move laterally, the bevel face presses against the rear of the nail and urges it through the slot between it and the finger 29. The free end of the finger 29 is rounded, as illustrated and on the return movement of the plates, this rounded end takes behind the nail and completes its movement so that it is precipitated from the main guide way 15 into the casing 18. The next nail then passes by gravity into position against the finger 29.

These feed plates with their fingers are held normally and yieldably with the finger 30 retracted, by means of a helical spring 33 that is attached to the plate 27 and to the side of the body of the apparatus, the feed mechanism being moved against the tension of this spring by means of a rock lever 34 that is pivoted on the side of the forward end of the body and has one end engaged with a leg of the arch plate 31. A rod 35 passed slidably through the body of the apparatus, has its end turned upwardly as shown at 36, in close proximity to the handle of the apparatus so that while the right hand of the operator is employed in manipulating a hammer upon the head of the driving plunger, a finger of the left hand, with which the apparatus is manipulated, may actuate the rod and therewith the feeding mechanism.

It is found in practice that the apparatus is entirely eflicient, the manual feed control avoids jamming and that the cost of manufacture is low, because of the simplicity of the apparatus.

hat is claimed is:

A nail driving apparatus comprising a magazine, a guide way, a casing with which the guide Way communicates, a driving plunger disposed in the casing, means for holding the plunger normally and yieldably above the guide way, guide arms, feed plates slidably mounted upon the guide arms and having fingers disposed toward each other and arranged to alternately overlie the guide way when the plates are reciprocated, an arch plate connecting the feed plates, a rock lever engaged with the arch plates for reciprocating the feed plates, a handle for manipulating the apparatus, and an actuating rod connected with the rock lever and having a finger grip disposed in proximity to the handle.

In testimony whereof, I affix my signature, in the presence of two witnesses.

JOSEPH J. STEPAN EK. \Vitnesses (lens. 0. STEPANEK, Jos. G. VAITH.

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