US997522A - Dividing-engine. - Google Patents

Description

W. B. TRUITT. DIVIDING ENGINE.

APPLICATION FILED 2113.27, 1911.

W. B. TRUITT, DIVIDING ENGINE.

APPLICATION FILED FEB. 27, 1911.

Patented'July 11, 1911.

2 SHEETS-SHEET 2.

COLUMBIA PuNouRAPH c0., WASHINGTON. n. C.

UNITED STATES PATENT OFFICE.

WILLIAM BROOKS TRUITT, OF GREENSBORO, NORTH CAROLINA.

DIVIDING-ENGINE.

Specification of Letters Patent.

Application filed February 27, 1911.

Patented July 11, 1911.

Serial N0. 611,220.

head; Fig. 3 a side elevation partly in section'of the complete machine; Fig. 4 a vertical section through the dividing head; Fig. 5 a face View of the dividing head.

The object of this invention is to provide a simple machine for intermittingly feeding a bar or sheet of material, the distance of each movement of the material being predetermined by an adjustable scale arrangement so constructed that any given length of or space on the material may readily and accurately be divided into, and without mental calculation, any desired'number of equal spaces within the limits 'of the apparatus, as more fully hereinafter set forth.

In the embodiment of my invention which I have chosen for the purpose of illustrating the principle thereof, a designates a hollow standard and b a lever pivotally depending from the upper end thereof and having its lower end connected by a strap or band 0 to a drum 03 mounted loosely on a horizontal shaft 6 journaled in suitable bearings at a distance from the standard and having its axis parallel with the axis of the pivot'of the lever. On this shaft 6 is mounted a feed roll f which cooperates with an idle feed roll 9 above it, the letter h designating the material which is to be fed by these rolls. It will be observed that the act of swinging the lever to the left unwinds the strap 0 from its drum' and through the medium of a suitable clutch 71 rotates the feed rolls and thus feeds the material. When this feed stroke is completed, a suitable device, such as a weight j hung upon a drum is attached to drum d, causes the band '0 to be rewound upon its drum, the clutch 2' serving to release the drum from the feed shaft and thus avoid feeding the material back again. It will thus be observed that vibration of. the depending lever will cause an intermittent feed of the material and that the distance of feed movement will of course be dependent upon the length of lever stroke and the proportion between the drum cl andthe feed roll f.

It will be understood that any suitable clutch arrangement may be employed and that otherwise the details of the mechanism for translating the vibratory movement of the lever into an intermittent feed'movement of the material may be greatly varied without departing from the spirit of my invention.

To vibrate the lever, I employ a rotary dividing head Z provided with a wrist pin m which engages in a longitudinal slot in the lever, whereby with every rotation of the head Z the lever will be caused to make a complete feeding and non-feeding stroke. The head Z is afliXed to a shaft 72 journaled in a carriage 0 mounted to vertically slide on a standard. A bevel gear 79 on the inner end of the shaft 12, meshes with a bevel gear g splined on a shaft 1' vertically mounted within thestandard. The lower end of the shaft 7" is provided with a bevel gear 8, and meshing with this gear is another gear t affixed to the inner end of the operating shaft a. With this mechanism it will be observed that the head may be conveniently rotated in each of its vertical adjustments. To move the carriage 0 vertically and to lock it in its various positions, I

employ a vertical screw o journaled in lugs on the standard and working through a threaded lug to Fig. 2 on the carriage. The wrist pin on is carried by a block 00 sliding in a radial'groove in the face of the head, and this block is adapted to be radially adj usted by means of a suitable screw 3 mounted in said groove.

It will be observed that with the construction above described the length of the feed stroke of the lever can be varied within the limits of the apparatus. Suitable scales are to be employed for determining the various adjustments. One of these scales, designated a, is laid off on the standard and is adapted to cooperate with the carriage, and the other scale, designated 5, is marked ofi' on the face of the head in position to de termine the radial distance of the wrist pin. It will be obvious that the shortest feed stroke within the limits of the apparatus is obtained by lowering the carriage to the first graduation mark in the scale a and by shifting the wrist pin to the innermost graduation on the head, and vice versa the longest stroke within the limits of the machine is obtainable by shifting the parts to the opposite ends of the scales. Any suitable scales may be employed and they may be laid off in accordance with well known mathematical principles. The scale a is preferably what may be called a total-space scale since it is laid ofi' to indicate the spaces or lengths that are to be sub-divided, while the scale on the head may be termed the dividing or sub-dividing scale since it is laid off to indicate the number of parts into which the total-space or length is to be divided. The following examples will illustrate the manner in which these two scales are to be laid off and the manner in which they cooperate: With the scales I have illustrated in the drawings, when the carriage is adjusted to the point 4 on the scale a and the wrist pin to point 12 on the dividing head, the machine will be adjusted to divide a four foot space into twelve equal parts, that is, into four-inch spaces. Again, should the carriage be adjusted to point 8, which point is exactly half-way between point a and the fulcrum of the lever, the machine is adjusted so that it will divide a space eight feet in length into twelve equal parts of eight inches each. Then should the wrist pin be adjusted to point 24: (that is, half-way between 12 and the axis of the dividing head), a space eight feet in length will be divided into twenty-four equal parts of four inches each. In this manner any given total space or length may be readily subdivided into as many equal parts as desired within the limits of the apparatus without mental calculation.

It is obvious that there are several applications of the principle of my invention in practical work, and it is intended that the principle be protected in all applications. The most important of these is to a punching machine, and this being the case I have illustrated at A a portion of a punching apparatus. There is one application of the invention that is especially important. Ordinarily the advancement of h is in a straight line. If h is advanced under a punch while, for example, part on registers with scale mark 12 on scale 6 and 0 registers with scale mark 4 on scale a, a l1ne of holes wlll be punched having a spacing of 4 feet and these holes will be in a straight line. By proper arrangement, however, they may be in a curved line, and it may be necessary that they shall be. For example, on a developed frustum of a cone, the top and bottom are curves of definite radii, and a line of holes for riveting at top and bottom must be on curved lines. These can be readily laid out and punched by my dividing machine. Take an example: Suppose a sheet of metal is to be formed to make the frustum of a cone, as in ordinary steel smoke stack work. Suppose the circumference of this joint at the top line of rivet holes is ninetyfive inches or 7 11 and that the circumference at bottom line of holes is 96% or 80%. Suppose the distance from one line of holes to the other is 5711; or 49J It is necessary that we have two complete dividing machines and that the rollers between which it passes shall not have Very broad faces. One of these sets of rollers must be placed in line with center of punch, and the other 571} inches in front of punch. Set off on one scale a 711 and on the other 80%. Set the number of spaces desired on both dividing heads. As the sheet is pulled through by the rollers one side advances 71l while the other advances 80%. Therefore the curve wanted is generated and the holes punched along that curve. To punch the other side reverse the setting of the levers and the opposite side curve will be generated.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a dividing engine, the combination of a support means for feeding the work, a swinging lever connected to said feeding means, a dividing head and means connecting it to said lever, means for rotating said dividing head to reciprocate the lever, means for shifting the dividing head along the length of the lever, means for shifting the connecting means between the lever and the dividing head radially with respect to the dividing head, and two scales on said parts cooperating with each other to determine the position of the parts relatively to each other.

2. In a dividing engine, the combination of a support means for feeding the work, a swinging lever connected to said feeding means, a dividing head and means connecting it to said lever, means for rotating said dividing head to reciprocate the lever, means 4 inches,

for shifting the dividing head along the the carriage and the other scale being a sub- 10 length of the lever, means for shifting the division scale and located on the dividing connecting means between the lever and the head. 7

dividing head radially with respect to the In testimony whereof I hereunto aflix my dividing head, and two scales on said parts signature in the presence of two witnesses.

cooperating with each other to determine WILLIAM BROOKS TRUITT. the position of the parts relatively to each Witnesses:

other, one of said scales being a tota1-space BESSIE STACK,

scale located to cooperate for positioning PEARLE WILSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

' Washington, D. G.

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