US 329366 A
Description (OCR text may contain errors)
2 Sheets-Sheet 1.
J. E. CRISP. TAGKING MAOHINE.
Patented Oct. 27, 1885.
.v y g a LII PATENT @EETE JOSEPH E. CRISP. OF B TACKING- SPECIPICATIGN forming part of Letters OSTON, MASSACHUSETTS.
Patent No. 329,366, dated October 27,1885.
Application filed August 12, 1885. Serial No. 174,183. (No model.)
To all whom it may concern:
Be it known that I, JosEPrr E. ORIsP, of Boston, in the county of Suffolk and Commonwealth of Massachusetts, a citizen of the United 4 States, have invented new and useful Improvements in Tacking-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.
Theinvention is represented as applied to a hand tacking device or tool; and it consists in various features of construction whereby the cost of construction as compared with other hand tackingmachines is quite materially reduced and its efficiency increased. It is especially adaptedfor use in driving tacks from tack-strips either of the kind shown and described in the Patent No. 197 ,609, dated March 27, 1877, or the all-metal strip shown and described in Patent No. 312,691, dated February 24, 1885, and in the pending applications of George WV. Copeland and Erastus \Voodward.
Referring to the drawings, Figure 1 represents a side elevation of a hand-taoker containing the elements of my invention. Fig. 2 is a vertical central section thereof. Fig. 3 is a vertical central section of the central and lower portions of the device at a right angle to that shown in Fig. 2. Fig. 4 is a horizontal section upon the line a; x of Fig. 1. Fig. 5 is a detail view showing in perspective certain parts of the feeding mechanism, which are hereinafter more fully described. Figs. 6 to 10, inclusive, are detail views enlarged, which show especially the operation of the feeding andstrip-holding mechanism.
Referring to the drawings, A represents the stock, which preferably is cylindrical in shape, and has the cylindrical chamber a and hole a the first for the reception of the rod or plunger B, and the second forming the passage in which the driver-rod b, carried by the plunger, is reciprocated, and the lower portion of which from the entrance of the feedway forms what is generally known as the throat of the machine. The plungerB is moved downward or inward against the stress of the coilspring I), which surrounds the upper part of the rod or plunger, and bears at its upper end against the head I) thereof, and at its lower end against the shoulder b of the stock A, the upper portion, a of the stock being somewhat enlarged to forr'n a cup or space, a, for holding the lower part or portion of the spring. The feedway C is the lateral passage opening into the vertical passage (o and through which the tack-strip is fed, and it is formed in part by the block or bracket 0, fastened to the stock, and by the devices which comprise the feed and a part of the cutting mechanism. The portion of the feedway in the bracket, arm, or block 0 consists, essentially, of a passage, 0, between the wall 0 of the bracket or block and the plate a, of sufficient width and depth to receive the shanks of the tacks, and the heads or head-connecting portions of the tack-strips rest upon the upper surface of this wall 0 and plate 0 The portion A of the stock I prefer to make separate and removable from the remainder, as it contains the throat and certain parts of the feeding device and feedway, which requires accurate feeding. The feedway C extends between the edge or surface d of the piece D and the surface (1 of the movable block D. The block or pieceD is angular in shape, and it has the portion (1 having the screw-holes d by which it is fastened to the stock and the portion d*, and the inner edge, (Z, forms one surface of the feedway and an abutment or jar, against which the tack-strip is clamped. There is also formed in the inner edge the recess (P, to provide room or space for the movements of the feed-pawl E, hereinafter described. The block D, which is supported by the stock, has the projections or teeth (2 d, (see Fig. 5,) and is movable positively inward by the lever D, pivoted at d to the stock and operated upon the downward movement of the plunger B upon the contact of the rounded or inclined portion at thereof with the end cl of the lever. The plunger not only serves to move the up per end of the lever outward at the beginning of its downward movement, but it also serves to hold the lever locked, and consequently the block D stationary, during the greater part of its downward movement, or from the time when it is brought into contact with the end of the lever. This is generally when it has made very nearly a quarter of its downward movement, but before the driver operates to sever or remove the tack from the tack-strip, as hereinafter specified. The block D is moved outwardly when released by the lever D by the spring (1. (See Fig. 4.) The feedpawl E has a notch, 6, formed between the projections e e, which is of a width and depth sufficient to receive the shank of a tack, and the pawl has two movements provided it, the first of which is a forward or inward movement to feed the tack-strip forward or inward, so as to bring the first or foremost unsevered tack into the throat of the machine. The sec ond movement is a lateral movement, or one at right angles to the feed motion,which is caused by the inward movement of the block D, and which disengages it from the shank of the tack and enables it to be moved backward to engage with the shank of the next tack in order. To give or provide the pawl with these movements, I have pivoted its arm 6 at e" to its operative lever E, and have arranged behind the upper end, 6, of the arm 6' a spring, 6 to throw outward the said end to throw inward the pawl. The lever E is pivoted to the stock at e, and its upper end, 6 projects into a long recess, 6 formed in the plunger B, and it is given an oscillating movement by the plunger to move the pawl Einward at or near the end of the upward movement of the plunger, and outward at or near the end of the lower or inward movement of the plunger. The inward movementis caused by providing the upper end of the lever E with the curved surface 6 against which the curved projection or portion 6 comes in contact upon the upward movement of the plunger, and the outward movement is produced by providing the lever with the rounded shoulder 6, against which the portion 6 of the plunger comes in contact upon the downward movement thereof.
It will thus be seen that the pawl E is moved inward to feed the tack-strip just' before the plunger comes to rest upon its outward'or upward movement, and that it is not moved outward to engage the next tack in order preparatory to again feeding the strip until the plunger has reached very nearly its lowest position, so that it becomes practically impossible for the pawl to feed more than one tack for each full reciprocation of the plunger.
The operation of the device is as follows: The tack-strip is placed in the feedway with its heads or head-connecting portion resting upon the wall 0 and plate 0 which of course may be covered by a covering-plate, if desired. The pawl, having engaged the shank of a tack, (see Fig. 9,) moves at the proper time the strip forward or inward to bring the first tack of the strip into the throat, as represented in Figs. 2 and 6. Immediately upon the downward movement of the plunger the block D is moved inward horizontally,the teeth or projections d d entering the spaces between the first and second and third tacks of the strip. This inward movement of the block D clamps the strip against the surface of the block D, l
and the headco nnecting portion of the tackstrip, if of metal, is supported upon the teeth or projections 11 d (See Fig. 7.) The driverbar B then severs, while the tack-strip is thus gripped, the tack'in the throat of the machine, and it is driven. The inward movement of the clamping-block D moves outward or disengages the pawl E from the tack-strip, (see Fig. 7,) and it is moved backward to engage with the shank of the next tack in order, (see Fig. 8,) the pawl automatically closing by a lateral movement upon the next shank when it has been brought into position by the outward movement of the lever E to do so, and before the block D has been moved outward. It will be seen that the blocks D -D not only serve to properly locate the tack in the throat of the machine and hold it there, but that they .also hold the tack-strip during the backward movement of the feed-pawl, and while it is engaging with the next tack preparatory to again feeding. It will be seen that the end of the driver adjacent to the inner edge of the blocks D D acts as a punch or severing device in cutting or removing the tack from the end of the strip, and also that the inner edge of the block D, when the blocks D and D are together, operates as a die or cutter in connection with the driver. It will be seen that the tackstrip cannot be fed by the feed-pawl unless the plunger makes a full, or substantially full, reciprocation. not moved outward preparatory to feeding until the plunger has substantially completed its downward movement, and because the feedpawl is not moved inward to feed the tack-strip until the plunger has reached substantially the end of its upward movement,and thatbetween these two movements the feed-pawl is held stationary either at the end of its inward movement or at the end of its outward movement. It will also be seen that the tack-strip is clamped, gripped, or held positively after the feeding movement-of the pawl between the blocks D and D, and that the block Dis moved positively and held locked during the greater part of the downward and upward movements of the plunger, it being free to be moved outward only when the plunger has reached very nearly the end of its upward movement. This construction insures the positive holding of the tackstrip in position while the feed-pawl is returning to engage with the shank of the next tack in order, and while it is so engaged. It will also be seen that the end 6 of the lever E acts as a stop in controlling the extent of the up ward movement of the plunger; also, that in connection with the recess 6 it acts to prevent the turning of the plunger in the stock or casing. It will also be seen that the forward part of the notch e of the feed-pawl prevents the tackstrip from moving too far forward, so that the teeth or projections d d of the block D will enter freely between the spaces of the tackstrip.
Having thus fully described my invention,
This is because the pawl is I claim and desire to secure by Letters Patent of the United States 1. In a tacking-machine for driving tacks from tack-strips, the combination, with the reciprocating driver, of the stationary block D, having the abutment d, and the movable block D, having the teeth d d, all substan tially as described.
2. The combination, in a machine for driving tacks from tack-strips, of the reciprocating driver B, laterally-movable clamping 'aw D, having the teeth d d and the reciprocating feed-pawl E, all substantially as described.
3. The combination, in a machine for driving tacks from tack-strips, of the reciprocating driver B, a stationary abutment against which the tackstrip is adapted to be positively operated and held, a movable jaw for locking the tack-strip against said abutment, and a feed-pawl having a shank-receiving notch and provided with reciprocating and lateral movements, as set forth, all substantially as described.
4. The combination of the reciprocating plunger b, the nose of the machine formed with the passage a and the tack-strip holder provided with the feedway G, and the block D, the inner edge of which acts as a cutter in connection with the plunger, all substantially as described.
5. The combination of the nose of the machine formed with the passage a and the tackstrip holder provided with the feedway O, and
the reciprocating driver B, supported above the entrance of the feedway to the passage a 5 movement with the plunger, all substantially 4 5 as and for the purposes described.
8. The combination of the block D, its operating-lever D and the plunger B, shaped to move the said lever D and lock it, all substantially as described.
9. The combination of the lever E, E, pivoted to the lever, as described, spring 6 and the described.
10. The combination of the block D, the lever D", for moving it inward and holding it locked, and the spring d, for moving it in a reverse direction with the plunger, all substantially as and for the purposes described.
11. In a tack-driving machine, feeding tack-strips, having a notch, e, for the reception of or for holding the shanks of the tacks, all substantially as described.
JOS. E. CRISP.
and the plunger, all substantially as Witnesses:
E. A. PHAL'EN, FRED. B. DOLAN.
5 the pawl a pawl for