US2048034A - Hammer - Google Patents

Description

1 July 21, 1936. R. F. SCHIVELEY HAMMER Filed April 18, 1954 Patented July 21, 1936 UNHTE STATES PATENT GFFEQE 1 Claim.

This invention relates to a hammer.

An object of the invention is to provide a hammer particularly designed for driving tacks, or short nails, and equipped with a magazine for holding the tacks and manually operable means whereby the tacks may be delivered singly from the magazine to the hammer head.

Another object of the invention is to provide a hammer having a magnetic head whereby the tack delivered thereto will be held in position for driving said hammer-also having a magazine for holding the tacks in readiness to be delivered to the head and manually operable means for delivering the tacks to the head singly and in succession as the tacks are driven.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawing wherein:

Figure 1 shows a side elevation of the hammer showing the delivery mechanism in the position it will occupy at the end of the delivery movement.

Figure 2 shows a cross sectional view taken on the line 22 of Figure 1.

Figure 3 shows an end View.

Figure 4 shows a fragmentary side elevation, showing the hammer in tack driving position.

Figure 5 shows a bottom View of Figure 4.

Figure 6 shows a fragmentary View of the hammer taken at right angles to the view shown in Figure 1, and

Figure 7 shows a fragmentary sectional view showing the main spring and casing therefor.

In the drawing the numeral I designates the handle having thehead 2 secured to one end 40 thereof. This head may have a weight 3 removably secured thereto to give the hammer the desired momentum. The driving end of the head is slitted as at I to form said end into the design of the ordinary horse shoe magnet.

45 There is an arcuate magazine 5 whose outer end is attached to the clamp 6. This clamp embraces the handle 2 and is suitably secured thereto. The forward end of the magazine, adjacent the hammer head, is attached to a bracket I 50 which is also secured to said handle. The magazine is channel shaped having its margins overturned toward each other and spaced apart to provide a dovetailed groove 8 to receive the heads of the tacks and also providing the longitudinal slot 9 between said overturned margins along which the tacks may pass as delivered from the magazine.

Suitably secured to the handle there is a spring housing IE3, preferably of cylindrical contour and in this housing there is a main spring II, coiled 5 about the cross pin I2. One end of the spring I I is attached to the housing and the other end is attached to the cross pin I2 which is rotatable in the housing. This cross pin has a spool I3 fixed thereon. Suitably mounted in the maga- 10' zine there is a pusher l4 having the outstanding fin I5 which works in the slot 9. The fin I5 has a lateral lug I6 and one end of the steel tape or ribbon I! is attached to said lug and the other end of said tape works through a slot in the hous- 15 ing Ill and is wound on the spool I3. When the magazine is filled with tacks as I8 the tension of the spring I I acting through the tape I I urges the pusher I4 against the assembly of tacks in the magazine. 20

Secured to the bracket I there is a flexible arm I 9 whose free end has the inwardly turned lug 20, Figure 5, which terminates in a finger 2| and this finger normally engages in front of the tack to prevent the discharge of the tacks from the 25 magazine.

Pivotally mounted on the hammer head there is a yoke comprising the side arms 22, 23, which are connected by the cross bar 2 3. These side arms embrace the head 2 and their free ends are capable of being flexed outwardly as will be hereinafter explained.

Pivotally mounted on the handle adjacent the grip end thereof there is a lever 25 whose free end is formed with a finger grip 26. A link 21 is pivoted at one end to the arm 23 of said yoke and is pivoted at its other end to the lever 25.

In use the cross head l4 may be retracted or moved outwardly clear of the outer end of the magazine and the magazine may then be loaded or filled with tacks and the cross head then reinserted into the outer end of the magazine. The spring I I is under tension and the forward tack in the magazine will be therefore held in yieldable engagement with the finger H. The user of the hamrner may then engage the finger grip 2B and retract the lever 25 into the position shown in Figure 4 thus pulling the yoke rearwardly. The free end of the arm 23 has an external knob 28 and when the lever 25 is retracted this knob will engage the inner side of the flexible arm I9 and force the same outwardly releasing the finger 2| from the forward track in the magazine. The free ends of the arms 22, 23 are inwardly turned forming the grip jaws 29, 30 Figure 6, at the driving end of the hammer the said jaw 30 terminating in the engaging finger 3 I. At the time theforward tack is released by the finger 2|, the finger 3| engages said tack and the jaw 30 is forced outwardly and finger 3! passes by said tack and the flexibility of the jaw 30 causes said finger 3| to engage behind the tack so released as illustrated in Figure 5, and jaws 29, 39 engage and grip'said tack. Upon engagement of the forward tack by the finger 3|, as above stated, the forward tack will .be slightly tilted rearwardly, causing its head'to bind or wedge in the magazine, setting up sufiicient resistance against the impact of the jaws 29, 30, to prevent the series of tacks from The lever being forced back along the magazine. 25 is then moved forwardly carrying the yoke back into its original position. When the arm i9 is released by the knob 23 the finger 2'! will move in front of the next succeeding tack, so as to retain the remaining tacks in the magazine. I

The driving end of the hammer'has the rearward extensions 32 whose outer sides are outwardly fiared and as the arms 22, 23 move back over said outwardly flared extensions, the arms 22, 23 are spread apart as shown in Figure 3 to release the tack. While the tackis being moved from the magazine, the flexible spring 33 bears against the head of the tack so as to return the tack from its tilted to its upright position and to force said head closely against the jaws 29 3!] and to cause it to clear the extensions 32. The tack will be held in, position for driving by the magnetic influence of. the hammer head and the lever 25 may then I again be retracted to the position shown in Figure 4 and the tack may then be driven. The succeeding tacks of the magazine may be releasedin a similar manner in tacks. I V

This type of hammer is'particularly useful in tacking up canvas on walls and in like places in the process of driving the carrying on the work of paper hanging and for similar purposes. r

The drawing and description disclose what is now consideredto be a preferred form of the and to permit the assembly to movelongitudinally along the magazine, a pusher, means normally urging the pusher against the assembly to affeet the discharge of thenails from the magazine,

'a yieldably mounted releasable retainer normally preventing such discharge, a,yoke pivotally mounted on the head comprising .fiexible 'side arms formed with inwardly turned gripping jaws thereon, manually operable means for moving said side arms and jaws into position to release the "retainer from thenail assembly and to thereafter engage the released nail, said jaws being formed to engage and grip the released nail, and

means for. moving said jaws to another position to release the retainer and to deliver the discharged nail to the driving end of the hammer.

- RAYMOND F. SCI IIVELEYL

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