US365497A

US365497A - Tack-driving machine

Info

Publication number: US365497A
Authority: US
Publication date: 1887-06-28
Anticipated expiration: 1904-06-28

Description

IWITHESE, ES.

(No Model.)

E. WOODWARD.

- TACK DRIVING MACHINE. I 7 No. 365,497, Patented June 28, 1887.

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Fig. 1.

UNITED (STATES PATENT ()rrrcn.

ERASTUS WOODW'ARD, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO THE COPELAND IMPROVED PORTLAND, MAINE.

LAST-ING AND TAOKING COMPANY, OF

TACK-DRIVING, MACHINE.

SPECIFICATION f'u'ming part of Letters Patent No. 365,497, dated June 28, 1887.

Application filed March 18, E87. Serial No. 231,334. (No model.)

To all whom it may concern.-

Be it known that I, ERASTUS WooDwARD,

construction and organization, all of which will be hereinafter described. t

In the drawings, Figure 1 is a view in side elevation of my tacking machine or tool. Fig. 2 is a Vertical central section thereof. Fig.- 3 is a view inelevation of the driver-rod. Fig. 4 is a horizontal section upon the line as m of Fig. 5 is a view in horizontal section upon the line 3 y of Fig. 1, and in plan of the parts below said line. Fig. 6 is a view in rear elevation, enlarged, of the lower part of the tacker. Fig. 7 is a section of the driverrod to show the shape of the cams thereon.

Fig. 8 is a view representing the position of the feed'p'awl at the end of its outward movement just before it is moved inward to engage the shank of a tack.

A is the stock or case. a is the foot or section to which the nozzle a is secured. The foot or section a and the stock A are preferably made of one casting, and the section of the stock between the ribs a a is adapted in using to be held or grasped by one hand.

B is the driver-bar, and b the driver-rod, which is secured to the lower end of the driverbar.

b is the passage or throat in which the driver-rod b is reciprocated. The driver-bar B extends into the hole I) in the stock, and is supported by the stock, and its end 1) extends above the stock and has the head or button I). It is adapted to be moved downward against the stress of the lifting-spring b a portion of which is held in the recess or chamber 12 in thehead of the stock.

0 is the horizontal feed way or passage, by

which the tack-strip c is fed to the driver.

0- is an extension of said passage, through which the tack-supporting strip is moved as the tacks are removed therefrom by the driver I). i

The tack-strip feedingdevices comprise a feed-pawl, D, which has the teeth (I d, of which the tooth d is adapted in feeding the strip to engage the shank of the first tack in order in the strip, and the tooth d the shank of the second tack in order. The pawl D is carried or supported by the lever or arm d,

which projects from the lower end of the shaft d which is inclosed in the case or stock A, and-the pawl is secured to the lever ,by the washer d, screw d which passes through a hole in the pawl, and'spriug d, which bears against the washer and forces the pawl against the under surface of the arm or lever d so that it is held thereto by friction, a leather washer, al being inserted between the upper surface of the pawl-bar and the under surface of the lever or arm (P, and another I provided withv a straight horizontal movement parallel with a tack-strip feedway as it is moved backward to engage the shanks of the tack-strip, as will hereinafter appear. The tack-strip is fed by the feed-pawl upon the movement of the driver-bar, and the pawl is moved'fromthe throat-of the machine, or the position in which it is represented in Fig. 5, outward from the throat and backward during the downward movement of the driver. These movements are communicated to the pawl through the shaft d rby means of cams upon the driver-bar B, which are oppositely arranged to each other. The 'cam E, cut in the side of the driver-bar B, and connected with the shaft d by the arm 6, controls the shaft and the lever or arm (1 during the downward movement of the head B, so that the teeth I) of the pawl are moved out of the passage b, and the pawl itself moved backward to bring the teeth (2 d into position to engage the shanks of the next tack in order. Of course the pawl D is turned by the arm or lever (1 until the projection (2 upon the arm d comes in contact with the plate d, and from that time on and during the continued movement of the lever 11 the pawl is moved horizontally on astraight line parallel with the tack-strip feedway. Upon the upward movement of the driverbar B, the cam E, (see Fig. 2,) which is a straight pattern cut in the side of the driverbar B, which is connected with the shaft (1 by the arm 0', (see Fig. 4,) turns the shaft d in 'an opposite direction from the cam E, and

this throws the teeth of the pawl into engagement with the shanks of the first two tacks of the tack strips, the pawl being moved inward upon an arc of a circle until a projection, (1 at the front end of the pawl D comes in contact with the surface d, which stops the farther inward movement of the pawl, and by the continued forward movement of the arm d the pawl is moved forward still in engagement with the shanks of the tack-strips, and having a straight forward movement, the pawl turning upon the pivot or screw-stud d as it is moved.

There is used for holding the first tack in order in the throat of the machine after it has been fed the hinged block F, having the tooth f, (see Fig. 5,) which shuts into the feedway at the point where it enters the throat, and which has an inclined surface toward the feedway and a straight surface toward the throat. This block is pivoted atf, and is held in position by the springf.

In feeding the tack-st! ip the shank of a tack coming in contact with the inclined surface of the tube forces it outward until the shank of the tack has been moved into the throat,whe n the spring turns the block to its original position and the tube thereon serves to close the passage to the throat of the machine.

I am aware that tack-driving machines or tubes have been made which embrace some of the features herein described, and my invention relates especially to the manner of operating the feed-pawl by means of a rock-shaft having movements imparted to it by the cam upon the driver-bar.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In a tacking machine or implement, the combination herein described of a feed-pawl for feeding the tack-strip, a rock-shaft, and a driver-bar provided with cam-surfaces for operating the rockshaft and pawl, substantially as set forth, l

2. In a tacking-machine, the combination of the driver-bar B, having cam-surfaces E E, feed-pawl D, rock-shaft d", and segmental arms 6 a, substantially as set forth.

3. In a tacking-machine, the feed-pawl carried by a lever-arm and operated by a rock shaft, the pawl being secured to thelever-arm by the set-screw d, and interposed spring and washers, substantially as set forth.

4. In a tacking-machine, the hinged block F, having the tooth f, which is adapted to shut into the feedway at the point where it enters the throat of the machine, and which has an inclined surface toward the feedway and a straight surface toward the throat, substantially as described.

ERASTUS VVOODWARD.

\Vitnesses:

THos. WM. CLARKE, FRED. B. DOLAN.