US876086A - Nailing-tool. - Google Patents

Description

PATENTBD JAN. 7, 1908. M. PBARSON.

N-AILING TOOL.

APPLIUM'IUI FILED nu'. 3. 190s.

SHEETS-SHEET 1.

No. 876,086. PATBNTED JAN. 7, 1908.

M. PEARSON.

NAILING TOOL.

APPLICATION FILED MAR. 3. 1906.

2 SHEETS-SHEET 2.

. MARTIN PEARSON, OF ROBBINSDALE, MINNESOTA.

N AILING-TOOL.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application Bled March 3| 1906. Serial No. 303.991-

Robbinsdale, Hennepin county, Minnesota,

have invented certain new and useful Improvements in Nailing-Tools, of which the following is a specification. My invention relates to tools adapted to feed nails into the path of a driving plunger,

. view of the samel and the object of my invention is to improve the device shown and described in Letters Patent of the United States, No. 467,864, issued to me January 26, 1892, and to adapt the device for handling and driving nails.

The invention consists, generally, in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure 1 is a side elevation partially in section of a nailing tool embodying my invention. Fig. 2 is a top Fig. 3 is an enlar ed view illustrating the feed chutes througi which the nails are conducted down to the driving lunger. Fig. 4 is an end view of the tool. Fig. 5 is a side elevation of the forward end of the tool showing the devices for controlling the feed of the nails. Fig. 6 is a sectional view showing the driving plunger in its normal raised position. Fig. 7 is a similar view showing the driving plunger depressed. Fig.

8 is a sectional view of the hopper on the line --ce of Fig. 1.

In the drawing, 2 represents a stock or frame for the tool, having a lower end 3 and a handle portion 4 adapted to rest upon the surface into which the nail is to be driven. A hopper 5, having a suitable cover 6, is mounted on the to of the handle 4, and is inclined slightly an has a bottom 7 provided with a series of longitudinal slots 8 forming chutes or guideways into which the Shanks of the nails drop and are suspended-by their heads therein'. The bottom 7 is a suilcient distance from the lower part of the hopper to allow the nails to stand `vertically in the chutes, which are of sufficient width to allow the nail shanks to drop through, but are too narrow .to ermit the passage of their heads. Ribs 9 V-s aped in cross section are mounted longitudinally on the bottom 7 between the slots therein for the purpose of engaging the nails and directing them into the slots. When a nail strikes the inclined surfaces of the ribs it will roll down thereover into one of the slots, and the shank falling therethrough will swing down to a vertical position. The inclination'of the slots is sufficient to cause the feed of the nails by gravity therein.

I have `shown a hopper provided with three parallel slots, but a greateror less number may be provided if preferred. These slots extend through the end wall of the ho per and. converge and merge into .a sing e chute or slot 10 rovided in an inclined plate 10 whiehextends downwardly from the end wall of the hopper. Suitable guards 10 are provided over the chutes, for the purpose of olding the nails in place therein. The nails traveling down the chutes 8 will converge and finally all mingle in one chute 10 and ass along therein to the driving mechanism. he nails are placed in the ho per and will automatically find their way into the feed chutes and work down therein into the chute 10. The shaking and jarring of the tool incident to its movement over the surface to be nailed will ordinarily be sufiicient to cause proper feedin(r of the nails, but if necessary at any time the. operator can shake the ho vper to break up any clogging of the nalls therein and insure their ra )id and uniform feed. A stop 11 is mounted on the frame of the tool, and a vertieall moving driving plunger 12 having a headvl is inountedin said stop, and is normally held in its raised position by' a spring 14, which is supported on an arm 15 and is looped around a pin 16 without contact therewith, and has ends adapted to straddle the head 13 Upon the depression of the driving plunger the spring 14 will` be put under tension to return 'the plunger to its normal osition when the nailmg operation is comp eted. The loo in the spring 14-is carried around each en( of the in 16, the spring at the beginning of the oop bearing on said pin, but being out of contact therewith except at one point whereby the flexing of the spring will be uninterrupted, and lts power through the greater portion of its length may be utilized. A ever 17 is pivote at 18 on the stock, and has a dependin inwardly curved arm 19 at its lower en d w ich normally projects across the lower end of the chute 10 and blocks the same to prevent the discharge of a nail. A second lever 20 is pivoted at 21 on the lever 17, and also has an inwardly curved arm 22 at its lower end near the arm 19 and normally out of the path of a nail passing down the chute 10. A stop 23 is provided on the! lever 1'7 againstwhich the leverA 20 isyieldin ly'held by a spring 24. A slot 25 1s prog-.1 vi ed in the stock in which a pin 26 mounted:-

lfrom the on the plunger 12 is adapted to slide, the lever 17 normally project' across said slot into the path of said pin. en the I scends the lever 17 willbeoscillated on its ivot and the arm 19 withdrawn temporarily path of the nails, land* the arm 22 will be moved across the chute 10 to obstruct the passage of the nails. During the time,l

however, that the arm 19 is being withdrawn and the arm 22 moved-across the chute, a single nail will be allowed to feed :forward ast the arms. When the pin-26 returns to its normal osition it willy engage Ythe upperend of the ever 17 and swing itslower end and the arm 19 back to its normal position across the chute. Thus, as indicated im Figs. 5 and 6, a single nail will normally occupy the space between the arms19 and 22 and be fed forward'out of the chute as soon as the arm 19 is withdrawn. After leavin the chute 10 the nails fall upon paralle spring jaws 27 supported at 28 on the frame of the tool and extending beneath the lower end of the chute 10 and across the space beneath the driving plunger and having their free ends inserted into curved slots 29 pro` vided in a plate 30 at the lower end of the stock. The spring jaws are a suiiicient distance apart to allow the nail Shanks to drop between them, but are too near together to permit the passage of the nail head, consequently when a nail falls out of the chute 1t will drop between the jaws and be suspended thereon, as indicated in Fig. 1. The slots 21 extend .downwardly and outwardly, and when the spring jaws are depressed the shape of the slots will cause the separation of t e j jaws suiiiciently to allow the passage of the jaws in the path of the driving nail head. The late 30 is fitted into a recess 31 in the stoc and is substantially flush with the surface thereof and is secured preferably by means of the projecting loops 32 provided at the edge of the recess. Y

The spring jaws will normally be in the u er ends of the slots 29 and substantial y orizontal, and the nails as .they are fed4 down out of the chute 21 will fall upon these pllunger, and

when the plunger is struck -by a ammer and driven downward its lower end will engage the head of the'nail and,force it and the spring jaws downward until the point of the vnail is driven into the surface on which the tool is placed. About the time the driving plunger reaches the limit of its downward movement, the spring jaws willA be separated by the outward curve of the'slots 29, and the nail head will pass between the jaws'and be freed from the grasp thereof, the plunger continuing its downward movement between the separated jaws until it reaches the limit of its stroke. The .spring 14 put under tenpin de-y 'fsion' by the` depression of the plunger will lift mit toits normal position and the nail dis- .,charged from the chute when the plunger lnroved down and prevented from drop ing u on vthe spring jaws by the presence o the p unger between themwill now be allowed to dropjbetweenthe jaws which have returned to their normall position ready to be depressed again upon the next stroke of the plunger. The nails can therefore be driven into a surface as rapidly as the blocks can be struck on the plunger.

lclaimas my invention:

'1. anailing tool, avertically arranged stock, a driving plunger mounted therein and having a head rovided with an annular groove and guar on each side oi said head, a spring having its middle portion looped around said head in said groove and passing throughsaid guards, whereby the accidental and extending rearwardly therefrom, and said spring having its ends secured to said arm and rovided`v with a suitable coil between sai ends and said head, substantially.

as described..

2. Ina nailing tool, a vertically arranged stock, a driving plunger mounted therein and n having a head, an arm mounted on the uper 1y 'disengagement of said spring from said 'head isfprevented, an arm mountedI on said stock portion of said plunger, a p1n arranged transversely the upper portion of said arm, and a spring having its middle portion looped Y around said head and its ends curved downwardly and coiled around said pin, and the extremities of said Vends bearing on said arm, and `said spring tending, normally to hold said plunger in a raised osition.

3.1 ln a nailing'tool, tllie combination, with al stock, of a vertically moving plunger ymounted therein, a nail chute arranged to deliverV nails into the l ath of said plunger, a lever ivoted on said steek and having a curve arm arranged to project across said chute andnormally prevent the dischargeof nails therefrom, asecond lever pivoted on said first named .leverand having an arm that is normally out of the path of the nails in said chute, 'said irst named lever having a sto thereon, and a spring device for norma ly holding. `said second named lever against said stop and yieldinglyholding said irst named arm across said chute, and a pin provided on said plunger and arranged to engage said irst named lever and move its arm out of the'path of the nails and movesaid second named arm across said chute into thel iI'ath of the succeeding nails when the one in ont has beendischarged.

4, In a nailing tool the combination, with a stock, of a vertically moving vplunger 'mounted therein, a nail chute arranged to 130 deliver nails into the path of said plunger, a gage said first named lever and move it out lever pivoted on said stock and arranged to of the ath of the nails and move said second project across said chute, and normally pre name lever across said chute into the path vent the discharge of nails therefrom, a secofthe succeeding nails when the first one has 15 5 ond lever pivoted on said first named lever been discharged.

and ada ted to swing in the same plane In testimony whereof, I have hereunto set therewit and normally out of the path of my hand this 24th day of February 1906.

the nails in said chute, and a single spring MARTIN .PEARSON. arranged to. y1eldingly hold said first named Witnesses: 10 lever across the path of the nails in said chute, RICHARD PAUL,

and means en said plunger arranged to en- C. MAONAMARA.

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