US694898A - Automatic hammer. - Google Patents

Description

Z 0 mm 4 M A u Mm 8T TA SM .0 m A 8 9 9 6 0 N (Application filed Mar. 29, 1901.).

2 Sheets-Sheet 2.

(No Modal.)

WlTHI-IEEEE:

UNITED STATE I PATENT OFFICE.

ANDRE STROMDAHL, OF MANCHESTER, NEYV HAMPSHIRE.

AUTOMATIC HAMMER.

SPECIFICATION formingpart of Letters Patent No. 694,898, dated. March 4, 1902.

Application filed March 29, 1901. Serial No. 53,376. (No model.)

To all whom it may concern:

Be it known that 1, ANDREW STnonDAHL, a citizen of the United States, residing in Manohester, in the county of Hillsborough and 5 State of New Hampshire, have invented a new and useful Improvement in Automatic Hammore, of which the following is a specification.

bodiment of my invention which is especially adapted to the work of lasting shoes and which, therefore, is a combined hammer and pincers. V

In the drawings hereto annexed, which illustrate such an embodiment of my invention, Figure l is a side elevation of a lastinghammer; Fig. 2, a plan view of the head end hopper removed; Fig. 3, a vertical sectional view'of the head end of the hammer; Fig. 4, a transverse section along the line a slot Figs. l and 3 looking from the handle end of the hammer. Fig. 5 is a plan View of the hammer-face; and Fig. 6, a section of the ham merhead, taken across the line 6 6, Figs. 1 and 4:, and viewed from below.

In this embodiment of my invention the hammer-handle is made of two articulated parts A and B, which form the two gripping members of the pincers and are jointed at b. The jaws A and B are formed integrally with the handles A and B and work in the ordi- -nary manner. The handle member A serves as a basisof'attachment for the operative parts which collect, arrange, feed, separate,

and drive the'tacks. The hopper H is a light but strong box, provided with a suitable cover which is latched at h and issecured to the middle portion A of the handle A by means of ears h, which are intcgralwith or firmly of the hammer with the cover of ,the tack liver end r of the racewa fastened to the hopper H, and fastening pins or screws k h which pass through the ears 1 h and the portion A of the memberA. The hammer-head E is provided with lugs 11,

which are suitably perforated to receive the pins 72. h whereby the hammer-head E is firmly secured to the part A Both the jaws A and B are centrally and longitudinally slotted at B to receive the tack-raceway R.

The raceway R is made of two parallel blades vent tacks from jumping off the guides, while.

permitting free movement of the stream of tacks down the guides to the point of delivery to the separating mechanism. The tacks are poured into the hopper H. A few shakes of the hammer will suffice to throw tacks upon the gathering blades r, which collect the tacks, tumble them to the guides r, where they are received points downward, and are arranged in a regular row along the blades 7" under the guard w. A notch 'r serves to prevent the lower part of the row of tacks from moving upward in the raceway, so that although the movements of the hammerin the hands of the workman may dislodge the tacks in the upper part of the raceway there will always be an ample supply of tacks at thede- The hammerhead E is cut away at E to receive the deliv ery end of the raceway.

The separation of the tacks one by one from the row arranged in the raceway is efiected by an escapement F, of which the separatorpoint F acts upon the shank of the lowermost tack in the delivery end of the raceway. The tack-separator is made to operate in relation to the movements of the driving mechanism and will be described in detail in connection therewith. Suffice it to say for the present that the separator at proper intervals in the operation of the tool pushes a tack from the delivery end r of the raceway into the delivery-channel 19, wherein it falls until arrested by the yielding stops S, which temporarily obstruct the opening of the channel 19.

The tack-driving mechanism consists of two connected partsthe driver, which gives each tack the driving-blow, and a driver-actuator, which transmits the impact of the hammer to the driver. In the embodiment of my invention herein shown these parts are represented by the driver P and the driver-actuator D. The driver-actuator is a movable part, standing normally in such position that it shares the impact of the hammer when the workman strikes a blow with it. By this means a sudden vigorous movement is imparted to the driver-actuator. Connections between it and the driver impart to the latter the requisite tack-driving movement. Thus in the form of hammer shown in the drawings the hammer-head E is perforated with slideways P and D in which the driver P and actuator D slide, respectively. The actuator D is a piston 0r plunger, having formed upon it the gear-teeth D, which constitute a rack. The

driver P is similarly provided with rack-teeth P. Between the slideways D and P the hammer-head is laterally perforated with a cylindrical bearing, in which the pinion shaft or block 0 is inserted. This pinion-shaft is provided with a pinion 0 which meshes with both the racks D and P. Spring D coiled around the actuator D, serves by its stress to urge the actuator to its normal position, in which it projects from the hammerface. When the workman strikes a blow with the hammer, the projecting driver-actuator D shares the impact and is suddenly and forcibly driven into the slideway D causing the pinion C to rotate and impart to the driverP a movementinreverse direction. The tack which has previously been lodged in the delivery-channel p, which is coincident with slideway P is thus forced out of the deliverychannel, the stops S yielding to the stroke of the driver. As the workman raises the hammer for the next blow the spring D again projects the actuator D and by means of the connections hereinabove described retracts the driver P. In Fig. 3 the parts areshown in this their normal position.

It is essential to the correct operation of an automatic hammer that a tack or nail feeding mechanism be provided whereby the driving parts are supplied with a tack for each descent of the driver. Many mechanisms have been contrived which serve analogous purposes in other nail-driving tools and machines and may prove adaptable to cooperation with the driving mechanism characteristic of my invention. I have shown in the drawings one form of tack feeder or separator which in practice has served its purpose satis factorily.

The tack feeder or separator is shown atF in Figs. 1, 3, and 4 and is an escapement which permits the passage of one tack at a time from tho raccwayinto the delivery-channel p. The feeder is a three-pronged claw, whereof one prong is the finger F which is armed with the separator-point F which moves across the lower end 1' of the raceway, Figs. 3 and 4. The second prong is the guide pin F which slides in a transverse perforation in the hammer-head E and serves to guide the feeder in its reciprocatory movements. The third prong is the cam-follower F which cooperates with the cam-surface C to give the feeder its requisite movements. The cam-surface C is formed in the end of the pinion-body C and turns under the follower F whenever the pinion is rotated either by the ascent or descent of the actuator D. A leaf-spring F which is secured by the fastening-screw 71 Fig. 1,bears at its end F on the separator F, so as to keep the follower F constantly in contact with the cam O.

The connection of the tack feeder or separator with thetack-driving mechanism is so arranged that the movements of the separator finger F are timed with reference to the movements of the driver P. Suppose the hammer to be prepared for use by filling the hopper H with tacks. The hammer is then shaken until the raceway R is filled with properly-arranged tacks, the lowermost tack resting with its shank against the separator-- point F, the parts being in their normal position, as shown in the several figures. Now if the hammer-head be pressed down upon a bench or if a blow be struck with it the actuator and driver make their movement above described, and then as the hammer is raised the actuator-spring D returns the driving mechanism to its normal position. This double excursion of the driving mechanism turns the cam O, and the feeder F by means of the follower F is moved out and then in under the influence of the spring F", the feeding-point F moving out and in across the raceway-channel. The outward movement of the feeding-finger F allows the lowermost tack to pass by the point F when it would fall into the delivery-channel p were it not for the fact that the driver P fills the channel. When the driver P is retracted, the feeding-finger inserts its point F behind this tack and wedges it out into the tack-delivery channel 19, wherein it falls, to be arrested by the stops in the delivery-channel. These stops may be double or single and may be arranged in the path of the driver wher- IIO ever the designer of a hammer embodying my blocks S. L'Ihe stress of .the spring 3 is eX-- erted toiclasp the blocks S together, as shown ,in-Fig. 6. 111' Fig. dtheuniting ends of the blocksS are shown tapered from above in order. to admit the driverP. .When a tack has beeon separated from the row-in the raceway I and drops into the delivery-channel 12, it rests f point downward upon the stopeblocks S.

Then at the next descent of the driver P. the

tack .isv driven, the blocks separating. in response to the. stroke of the driver.

Occasionally it'is .desirable to suspend the automatic action of the hammer, .so as to use the hammer in the ordinary way. For this purposel provide the catch K,which is the end of a latch insertedin a suitable perforation in'the side of-the hammer and is seen in Figs. 1- 1 and-3. This latch isanextension fromthe bar 10 with which it is connected by the dset'k. The bar 70 slides in lugs it, which are secured to or form part of the plate-k which is fastened to the hammer-handlein such position that the-finger-hold iofiwhich is suitably bent outward,- lies within easy reach of the workmans forefinger. A spring constantlyeurges the-latch 76 toward the hammerhead E.

the actuator whereby movement of. the actuatorin response to impact act uates the driver.

On the side of the actuatorHD which lies.

opposite the latch end kthere I is a notch d; which-registers with the latch. end K'when the actuator is raised to its farthest entrance into the hammer-head andwhen the end of the actuator is flush-,- orinearly so, with the face of the hammer-head, Fig.'=3. So long as: the workman presses on the finger hold'is the I actuator slides up and down without3-hin--- drauce butshould the workman wish tos usi .pend the. automatic actionof the hammer he lets go the finger-hold k at the time he strikes a blow, and. the spring is then thrusts the latch end K into the notchd, whenthe latter registers with it ands holds all-the automatic Then the hammer may be parts in restraint. used like an ordinary tool.- 1

What I claim, and-desire to securepby Let-w ters Patent, is

1. In an'automatic hammer,--the combination with tack-feedin g devicesot a hammer.- head,- a. movably mounted tackdriver, a driver-actuator movably mounted in suchposition as to share the .im pact of the ham mer, and connections between the driver and 2. In an -automatichammenthe combination'of a hammer-head, a hopper} a raceway.

leading therefromsto a driver, the driver, a

driver-actuator movably mounted and normallyprojecting from the hammer-'face,and i connections between the actuator and-driver whereby. movement of the actuator transmits tothe driver amovement in reverse direction .to that oftheactuator'. V f

3. In an automatic hammer,thecombina tionof ahammer; -a hopper, aracewaydeading therefrom to a-driver,the movably-mounted driver,-a' movabledrivereactuator mounted in positionto share the impact of the hammer, and connections betweenthe-actuator and. the driver whereby movement of theformer in response to impact transmits a drive ing movement to the latter. 4. In-an automatic hammer,

ing therefrom to a delivery-channel, the dethecombinaltion of a hammer, a hoppera raceway lead 7 livery-channel, a driver movabletherein, a

movable driven-actuator mountedin position to share the impact of thehammer and connections betweenthe actuator and the driver wherebymovement of the former in response to impact actuates thelatter to force a tac out of the delivery-channel.

5. In an automatic ham-merythe combination of tack-feeding devices, a hammer-head, a movably-mounted driver,amovably-monnted driver actuator, 'normally extended beyond the face of the hammer-head, and-connections between the actuator and the-driver whereby movement of the formerin response driving movement to ator and the driver whereby movement ofthe former in resp'onse 'to-yimpactf transmits adriving-movement tothe latter.

7.. In an automatic hammer, the combination of a hopper-ya raceway leading therefrom to a delivery-channel in-ahammer-head, the

ham trier-head, a-dri-ver movably mounted in the hammeriheadg a movably-mounted driveractuator, normallyextended beyond theface ofthe hammer-head, and. connections be-i tween the actuator and'driverwhereby1move= ment of :the former in response to impact ace" tuates the latter toforce a tack out of the dea-r' livery-channel.

8. In'an automatic-hammer, the combina-'- tion'with tack-feeding devices of a ihammer-+- head, two slidewaysxtherein, a driver slid-- inglymounted-in one slideway, a driver-actu atorslidingly mountedinthe other, the actu-:- a

ator normally-extended'to such position as to share the impact of the hammer, and connections between the'actuator and thedriver whereby movementof-the formerin response to impact transmits driving movement oi-the latter. 7 V

9., Inv an automatic hammer the combi-na tion ofa hopper, a raceway leading from the hopper toa delivery-channelin a hammer head, the hammer-head, two slideways therein; one-coincidentwith 'thewdeliverychannel, 1 a driver :sliding' in said slidtwvay,-':the: other slideway bearing a movable driver-actuator.

whichis normally'extendedbeyond the face of thehammer-head, and'connections between the actuator and driver whereby'movement of the former in response to impact of the hammer actuates the latter to force a tack out of the delivery-channel.

10. In an automatic hammer, the combination with tack-feeding devices of a ham merhead means for yieldingly holding a tack in the path of a tack-driver, the movably-mounted tack-driver, a driver-actuator movably mounted in such position as to share the impact of the hammer, and connections between the driver and the actuator whereby movement of the actuator in response to impact actuates the driver.

11, In an automatic ham mer, the combination of a hammer-head, a hopper, a raceway leading therefrom to a driver, the driver, a yielding stop in the path of the driver, a driveractuator movably mounted and normally projecting from the hammer-face, and connections between the actuator and driver Whereby movement of the actuator transmits to the drivera movement'in reverse direction to that of the actuator.

12. In an automatic hammer, the combina tion of ahammer, a hopper, a raceway leading therefrom to a driver, the movably-mounted driver ayielding stop in the path of the driver, a movable driver-actuator mounted in position to share the impact of the hammer, and connections between the actuator and the driver whereby movement of the former in respouse to impact transmits a driving movement to the latter.

13. In'an automatic hammer, the combination of a hammer, ahopper, a raceway leading therefrom to a delivery-channel, the deliverychannel, a driver movable therein, a yielding stop in the path of the driver, a movable driver-actuator mounted in position to share the impact of the hammer; and connections between the actuator and the driver whereby movement of the former in response to impact actuates the latter to force a tack out of the delivery-channel.

14. In an automatic hammer, the combination of tack-feeding devices, a ham mer-head, a movably-mounted driver, a yielding stop in the path of the driver, a movably-mounted driver-actuator, normally extended beyond the face of the ham mer-head, and connections between the actuator and the driver whereby movement of the former in response to impact transmits a driving movement to the latter.

15. In an automatic hammer, the combination of a hopper, a raceway leading therefrom to a driver, the movably-mounted driver, a yielding stop in the path of the driver a movable driver-actuator normally extending beyond the face of the hammer-head, and connections between the actuator and the driver whereby movement of the former in response to impact transmits a driving movement to the latter.-

16. In an automatic hammer, the combinati on of a hopper, a raceway leading therefrom to a delivery-channel in a hammer-head, the hammer-head, a driver movably mounted in tuator, normally extended beyond the face of.

the hammer-head, and connections between V the actuator and driver whereby movement of the former in response to impactactuates the latter to force a tack out of the deliverychannel.

17. In an automatic hammer the combination with tack-feeding devices, of a hammerhead, two slideways therein, a driver slidingly mounted in one slideway, a driver-actuator slidingly mounted in the other, the actuator normally extended to such position as to share the impact of the hammer, a yielding stop in the driver-slideway, and connections between the actuator and the driver whereby movement of the former in response to impact transmits driving movement to the latter.

18. In an automatic hammer the combination of a hopper, a raceway leading from the hopper to a delivery-channel in a hammerhead, the hammer-head, two slideways therein, one coincident with the delivery-channel, a driver sliding in said slideway, the other slideway bearing a movable driver-actuator which is normally extended beyond the face of the hammer-head a yielding stop in the delivery-channel, and connections between the actuator and driver whereby movement of the former in response to impact of the hammer actuates the latter to force a tack out of the delivery-channel.

19. In an automatic hammer, the combination with tack-feeding devices of a hammer, tack-driving mechanism consisting of a driver and a driver-actuator, each provided with a rack which meshes with a pinion, the pinion, the driver-actuator being mounted in such position as to share the impact of the hammer, and by its movement in response to such impact to actuate the driver through the pinion.

20. In an automatic hammer, the combination of a hammer-head, a hopper, a raceway leading therefrom to a driver, the driver, a driver-actuator movably mounted and normally projecting from the hammer-face, the driver and its actuator being provided each with gear-teeth which mesh with an intervening pinion, and the pinion,whereby movement of the actuator transmits to the driver a movement in direction reverse to that of the actuator.

21. In an automatic hammer, the combination with tack-feeding devices, of a hammerhead, two slideways therein, a driver slidingly mounted in one slideway, a driver-actuator slidingly mounted in the other, the actuator normally extended to such position as to share the impact of the hammer, the driver and actuator provided with gear-teeth which mesh with an intervening pinion, and the pinion, whereby movement of the actuator in response to impact transmits driving movement to the driver.

22. In an automatic hammer the combination of a hopper, anacevvay leading from the hopper to a delivery-channel in a hammerhead, the ham mer-head, two slid eways therein, one coincident with the delivery-channel, a driver sliding in said-slidewaflthe other slideway bearing a movabl'e driver-actuator which is normally extended beyond the face 1 inion and the inion whereb movement of the hammer-head, the driver and actn'ator provided with gear-teeth whichv mesh with a of the actuator in response to impact of the hammer aotuates the driver to force 'a tack out of the delivery-channel.

23. Inan automatic hammer, the combination of a. hopper, a raceway leading therefrom,tacl;-driving mechanismconsisting of a driver and driver -actuator, each provided with a rack, a pinion meshing with the said racks, the driver-actnator beingmonnted in I snchposition as to share the impact of the hammer, and by its movementjin response to such impact to actuate the driver through the. pinion, and tackdelivery mechanism consisting of a tack-escapement and connections therewith to the tack-driving mechanism, wherebytack feeding and tack-driving operations are alternated. 3 l 24. In an auto'matichammer, the combination ofahopper a racewayleadingtherefrom, a hammer-head, a driver, a'driver-actnator, geared together by a pinion the pinion, a tack-escapement in the raceway, connections between the "escapem'ent and the pinion, whereby tack-feeding movement of the escapement alternates with movement of the tack-driver and actuator. f a

25, In an autom'atichamm'er, thecombination with tack-feeding'devices, of a hammerhead, a mofvahly mount-ed tack -driver, a driver-actuator movably mounted in snch'position astoshare the'impact of the hammer, andconnections between the driver and the actuator whereby movement'ofthe actuator in response to impact actnates the driver and a catch under the control of 'th'eoperator,

be restrained from movement.

tionwith tack-feeding devices, of a hammerhead, a movably-mounted tack-driver a driver-actuator movably mounted in such po- ;sition as to share the impaotof the hammer, and connections between the driver 'and the actuator whereby movement of the, actuator in response to impacts actnates the driver and. a' spring-actuated catch, (under I the control of the operatoiyand normally urged to- Ward a position of engagement with the dr iveractuator, whereby the actuator may 27. In anautomatic hammer, tion-with tackfeeding devices, of a hammer, tack-driving mechanism consisting of a driver and a driver-actuator, each'providedwith a rackwhioh meshes with a pinion, thepinion, the driver-actuator being mounted in such position as to share the impact of the hammer, and by its movement inresponse to such impact to actuate the driver through the pinion,'and a catch under the control of the op erator whereby the tackedriving mechanism may he restrained from movement.

28,111 an automatic hammer tliecomhination with'taok feeding devices, of. acha'mmerhead, two slideways therein,a" driver"slidin'gly'mounted in one'slideway, a spring-controlled driver-actuator slidin'ggly mounted in theother, the actuator normallylextended by the force of its spring to such position as to share the impact of the hammeigand connec' tions hetween'the actuator and th'edriver whereby movement of theformer in response to impact transmits driving movement to the latter. w I a I V j,

29. In an automatic hammer, the combination of jpincers, a hammer head secured thereto, tack-drivingdevices in the hammerhead, a tack reservoir and raceway leading therefrom to ,the tack-driving devices, the pincer members provided with a slot forlthe admission offthe tackraceWayJf r Signed by me, at Manchester; New Hampshire,"this 26th daytrtmmt, 1901. q ANDREW STROMDAHL, V Witnesses: f i N V.

EDWINF. J ONES,

A; 3. LAN

the combina

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