US888485A - Tack or nail driving device. - Google Patents

Description

No. 388,485. PATENTED MAY'261908.. P. R. GLASS. TASK 0R NAHj Damm; DBVIGB.

APPLICATON FILED DBO.9, 1905.

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PATENTED MAY 26, 1908.

P.R. GLASS. TACK OR NAIL DRIVING DEVICE. APPLoATIoN 'FILED DB0. 9, 1905'.

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f/ f y No. 888,485. K PATBNTBD MAY 28, 1908.

- P. R. GLASS.

TACK OR NAIL DRIVING DEVICE. APPLIUATION FILED 1380.9. 1905.

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Unten STATES PATENT orrron..Y 'i

rnnLnr n. GLASS, or oUrNcY, nl-lSSAcnUs'nTTS,ASsieNon, BY-MESNE ASSIGNMENTS, To i Tnonis o. PLANT, or BoSToN, MASSACHUSETTS.

. TACK DRIVING DEVICE.

Specification of Letters Patent.

Patented may 2e, 190s.

applicati@ inea December a, was. Seriana.' 291,065.

.1.5 the elliciency thereof.

Although it may have other and more extensive application, in its illustrated em-V bodiment. my invention is shownr as applied to a handtackmg device of the type` where 2d the tacks are fed from an inclined channeled nail holder or magazine into a driver head and beneath a reciprocatory plunger, the driver head beingl provided with devices constructed successively to separate ,the tacks from the line ol" tacks held in the magazine and to bring and hold the se'parated tacks in position to be driven by the forward movement of the plunger.

One object of my invention is to simplify' the separator mechanism, render 'it readily accessible-and open for inspection, and less susceptible to impairment.

These and other objects of my invention will be best understood by reference to the following` description when taken in con# nection with the accompanying 'drawings showing for illustrative purposes one selected embodiment thereof, while its scope will be more particularly pointed out in t-he ape@ pended claims.

in the drawings,-Figure 1 is a side elevation, 1n partial sect1`on,.show1ng a hand tacklng device embodying one lorm of my 1nvent-ion' FiO'. 2 is a section taken on the line A 35 2-2- in Fig. .l 3 Fig. 3 is-a section on an enlarged scale, partially broken away and taken through the driver and lengthwise the track channel or race-way; Fig. 4 is a seetion in plan taken on the line 4-4 inFig. 3

@ Fig. 5 is a sect-ion similar to Fig. 3, taken however in a transverse plane passing through the plunger' rod and the barrel of the sliding se iarator and-showing the latter in its normal position; Fig. 6 is a similar view showing the plunger rod depressed and to implements for turning.

, (separately shown in Fig. 9), the latter being the separator in it's out position; is a perspective view of these arating block;

Fig. 8 is a section in plan ta en wherex indicated by the line a-a in Fig. 7; Fig. 9 is a v perspective view of the head block; Fig. 10 60 is a perspective in section taken on a line slightly abovethe line 4-4 in Fig. 3 and showing the separator block in its normal or fin position, and Fig. 11 is a similar per spective showinor the out Referring tol the illustrative embodiment of my invention shown i/n the drawin s, and more' particularly to Figs. 1 and 3, t ere is novided a tack or nail driving head a, having lormetl thereon a handle portion comprising an upright hollow sleeve a inwhich is slidably mountedthe hollow plunger a2. The latter is rovided at its lower end with the closed so id hea-d a3 in which is pinned or otherwise iixedly secured the driver-rod b, and the shorter plungenrod c, the latter lying parallel with and adapted to move coincidently `with the driver. The hollow plunger is normally held elevated or'retracted through the medium cic the inclosed interior spiral so spring of, w-"riich` being initially compressed bears at its lowerend upon the round stationary stud (if and at its upper end against the threadedplug d adjustably screwed into the open outer end 4of the plunger.' The stud a5, as shown in Fig. 2, passes transversely through the hollow sleeve, having threaded engagement with the walls thereof, and also through longitudinal slots o7 oppositely formed inthe sides of the hollow plunger acting to guide and prevent the latter from The )lunger therefore if forced down by the blow of a hammer 'delivered upon its enlarged projecting head end will be uickly restored to its normal retracted posi- '95 tion by the action of the spring a4, the stud a5, by abutting against the plunger head a3, acting as a. limiting stop to outward or backward plunger movement. The stud a5 being held in position by threaded engagement with the walls of the sleeve only is free to be withdrawn. at any desired time.

Near its base the head o is fashioned or recessed at one side to receive the head block d screwed, or otherwise suitably fastened 1n fixed position to and within the head. The said block has a vertical drivingl passage d maintained in fixed alinernent with the driver l, and in alinement also with a continua- 1'10 position thereof. -65

tion` ofthe driving passage formed in the deending cone-shaped lfoot e threaded into the Eottom ofthe head. The driving passage is of sufficient size to accommodate the tacks or nails intended to be driven, andsuitable means are provided for admitting the tacks laterally thereto beneath the plunger'andfor there holding` the admitted tack to be driven on descent of the driver. For this purpose there is provided the inclined'tack holder or magazine f comprising an elongated casing having a rectangular slot or channel f of sufficient width to receive the bodies of the tacks, while the heads thereof rest upon the upper face or'edgesof the casing and are covered by the inclined protecting plate f 2. T he casing f is iXedly bolted, or otherwise secured, to the. side of the lateral arm as, the

` latter inclined upwardly andloutwardly from the driver-head, and'ther is thus formed an inclined channel or way down which the tacks tend to gravitate i-n a single column toward the driving head.

l The upper and opposite end of the casing is provided with suitable means, such for eX- ample as the spring clasps f 37" 4 shown, which permit the same to be secured or otherwise I placed when the instrument is at rest in operwhile the magazine fis of convenient and' sui-table form, any storage receptacle or tack feeding devices which will coperate in the proper way with the separating vand driving means may be used in connection therewith.

The lower' end or nose of the magazine framef when it abuts against the head'block d. is cut away to receive a projecting art da (Fig. 9) of the block, the latter having ormed therein an aperture consisting of a T-slot d2, which is held in alinement with the channel slot of the magazine to n ermit passage of the tacks therefrom to theI f riving passage.

AFor separating the foremost tack from the line of tacks fed through the magazine to the driving head and for moving the separated tack through the T-slot and into the driving passage d beneath the plunger, there is provided a tack-separating device herein conlsisting of the reci rocatory hook or jaw qv carried upon the s iding, separating block tg, the latter mounted in the head block for reciprocating movement toward and from the driving mechanism. To give a firm unyielding sliding bearing, the separator block is provided with the rearwardly extending barrel g2 which has a sliding fit in a transverse tubularbox formed (Fig. 5) partly in the headblock d and .partly in the driving head a,

and with the separator block is adapted to l move from the position shown in Figs. 5 and 10 to that shown in Figs. 6 and 11, l i

The separator block is yieldably4 held tc its normal or fin osition by a spring-pressed ,plunger h (Fie. 5 the nose of which envages a depression grZ (Fig. -11) in the outer lace 'of the block, The `plunger slides in a barrel k carried by the 'swinging 'arm h2, the latter swiveled to vthe driving head uponl the 'stud h, While the plunger is normally. springpressed by the spiral spring h4 within the vbarrel to maintain the separator, block in its in position, it may be forced. b cack into the barrel by pressure upon the jbinck, or may be withdrawn toy release block/by retraction ofthe thumb nut hi secured to the projecting stem of the plunger at i" outer an opposite. end. -When thus retracL ed the plunger may be swung aside with and uponthe arm h2 and free accesshad to the driver-head for theremoval of the separator block, or for other pur oses.

en the block is in its in position, the outer edge of the separator jaw lies across the ta'ck channel or slot f (see Figs and 10) andv by closing the latter prevents the admission of tacks from the magazine to the T-slot and driving passage. For the .feedin of successive tacks to a ositionbeneath t e plunger,

the separator b ock is intermittently moved to withdraw the separator jaw fromv the` mouth of the tack channel, and for this purpose the separator barrel q2 is provided (Figs.

5 and 7) with a vertical slot g4 having an inclined or beveled wall gv5 sloping upward and outward, the u per edge of which, on the in positiono the separator block (Fig. 5) lies within the path of the beveled lower edge c of theplunger rod. As the latter descends, it passes through the opening c2 provided for that purpose in the driving head and thehead block and enters the slot g4, where, by the pressure of the beveled edge c of the plunger rod upon the beveled wall g5 of the slot, it thrusts aside the .separator block against the pressure 'of the spring h4 into the out position shown in Fig. 6. The separator jaw thus thrown laterally by the descent of the plunger rod assumes the position best indicated in Fig. 1 1, open-ing the tack channel to permit entrance of nails to the T-slot d2 in the driving block With the descent of the plunger rod c, however, the driver also descends and'in advance thereof, so th'at when the mouth of the channel slot is opened by the withdrau'fal of the separator aw, the foremost tack passes into the T-slot but against the side oi the driver thenoccupying the driving passage,l where the foremost tack, aswell as the entire line or column is held against further movement, as best indicated in Fig. 11. On the retraction or rise of the lunger, the plunger'- rod is raised and with rawn from engagement The forni of the. curved inner face or edge of the jaw' g is such that during inward movement thereof afterits point has separated or seized atack in the manner ldescribed the latterwill be carried or pressed inwardly by the'action of the curved face of the hook towards and within the driver passage as soon as the driver retract-s sufficiently to opener expose the same. When the tack is expelled from the slot into the driver Vpassage the separator block with its separating jaw is permitted to complete its inward or'closing move- `nient. The tack thus delivered and adiiiitted :to -the driver passage falls fromits position of entranre'ziiito the position shown in Fig. 3,`wh er e. it rests (Figs. I and 4) upon the nose of a yield-able retaining pin i, which projects laterally slightly into the driver passage. 'lhe driving beau is bored laterally to receive a `Spring i', which is retained by the threaded plug', but which bears against an enlargedV `head. of the pin i, thereby normally pressing the same into its position of entrance within the driver passage, but permitting the saine to yield to releasethe tack when the saine is struck by the driver on descent of the latter.

The complete operation of the described device will now be clear. When the implement is suitably supplied with. tacks and in operation, a tack previously separated and forced into the driving passage by the jaw gf, is there retained bythe yielding retaining pid` i, below .the jaw, however, and in position foriA driving beneath and within the'path of the *i driver. The outer curved edge of the separator jaw is in position across the tack slot of the holder, thereby closing the saine andholding the tack or line of tacks therein. Then the driver is depressed to drive the tack, its lower end strikingthe tack-head, will thrustaside the yielding pin t' and release the tack, which passes down the driving passage before the driverand-into the work, against which the bottom of the foot e is held.' The release and descent of the tack is quickly followed by the descentand entrance of the plunger rod into the vertical slot (/4 of the separator block, iinparting an endwise movement to the latter.

.The resultant withdrawal of the separator jaw from the foremost of the line of tacks permits the advance of the latter against the depressed driver, further movement of the said tacks being prevented until the lower extremity of the. subsequently ascending driver has passed a height sufficient to clear the head of the foremost tack. Before this occurs, however, the plunger rod c has 're- -leased the separator block and the'point of the separator jaw passes between the first andl I the next adjacent tacks. The inner edge of the jaw engages and presses against the shank or body of the foremost tack and the outer edge thereof against that of the next adjacent tack. 4The jaw, being then. permittedv to complete its inward movement, swings theA foremost tack'into the driving passage and the body of the nent tack Vis swung somewhat backward, as shown in Fig. 3. The tack thus fed to the driving passage descends until caught upon the retaining pin, where it is held in readiness for the next stroke ofthe driver.

From Figs. 4, 7, 8. and 9 it will be seen that the lower portion of the driving passage where it intersects the head block d, is formed in part by the walls of the separator block and that the latter, where so formed, symmetrically completes the cylindrical passage without contraction thereof and offering no resistance or obstacle to the downward passage of the tack. Each tack on admission to the driving passage is restrained from passing to the bottoni thereof and out of its mouth, if the latter be uncovered, by the sliding pin i alone. This construction is to be preferred to that where the separator is so formed as to contract inore'or less the driving passage and thus provide a rest for the tack on its admission thereto, the separator yielding and moving outwardly to withdrawl the contracted portion or rest from beneath the tack' head and release the latter onimpact of the driver thereagainst. ln the construction here disclosed the separator block has the.

simple function of separating and feeding' the tacks and is required to undergo no initial movement to release the'tack already in the passage, but only a feeding and separating movement under the sole control of the plunger-rod c. This simplifies both the movement and the construction of the separator mechanismA andbetter assures its positive and ,accurate movement for the separation and feeding ,of the tacks.

The accuracy of operation and simplicity i 'Witi the swinging or removable retaining arm, for,on withdrawal of the arm to release the separator block, the latter may be entirely removedfrom the head-block, giving AvMcess to, and free inspection of, the tack passages therein.

Claim.

1. A hand-teckel provided With a driving A' assage and a tack-passage leading thereto, a ongitudinallysliding, separatinU device for separating and feeding the tacziis into -the driving passage, the Walls of the separating device forming a eontinuouspart .of the driv for engaging the separating device to move sov the same and means independent of the plunger rod for returning the sliding tack separating device to initial position.

3. A hand-tacker having a reciprocatory separating-device, an arm, and la springpressed member upon said arnx for holding said separating device in position said arm being mounted to swing out of the path of movement of the separating device. l

4. A liand-tacker having a reciprocatory separating-device, spring-pressed means for holding the same iii position, anda movable support for said spring-pressed means Whereby the latter may be withdrawn fromengage ment with said se arating device;

5. A hand-taclier having reciprocatory separating-means, a member yieldably holding said separating-means against movement in one direction, a swinging arm su porting said member, and means for manua ly Withdrawing said holding means from said separating-means. l

6. ln a liand-taclier, the combination 'With separating-means, of a movable arm, a barrel carried by said arm, and a spring-pressed plunger movable in said barrel and adapted for engagement with said means, said plunger having a projecting stein ior'manual engagenient.

7. A hand tacker comprisin 1n combination, a driving head a, a headlock d, and a sliding, separating block g, said heed-block on the block for sliding it in tie oppositeA direction.

ln testimony whereof, I have signed -my vnaine to this specification, in the presence of two subscribing Witnesses.

PERLEY R. GLASS.

Witnesses:

THOMAS B. BOOTH, EDITH E. CHAPMAN.

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