US1016206A - Threading-tool. - Google Patents

Description

vJ. M. CARPENTER.

THEEADING TOOL.

APPLICATION FILED FEB. 17, 1911.

Patented Jan. 30, 1912.

W/TNESSES ATTORNEYS COLUMBIA PLANOGRAPH co..\v^sHlNToN. D. cA

UNITED STATES .PATENT oEErcE.

THREADING-TOOL.

Specication of Letters Patent.

Application filed February 17, 1911.

Patented Jan. 30, 1912.

serial No. 609,079.

To all whom t may concern.'

Be it known that I, JAMES M. CARPENTER, a citizen of the United States, and a resident of Pawtucket, in the county of Providence and State of Rhode Island, have invented a new and Improved Threading-Tool, of which the following is a full, clear, and eXact description.

My invention relates to threading tools, and particularly to an attachment for tools of that description, by means of which the stock, that is, the shank of the bolt or other article to be threaded, is, held in proper relation to the die of the tool in order to prevent the thread from being cut obliquely or skewed, when the tool is used.

The attachment referred to comprises a guide bar which is adjustably held in position across the forward or working face of the threading tool, and which is formed with a number of transverse perforations passing therethrough, these perforations being of different diameters to fit the size of the stock or bolt that is to be worked. Since the guide bar is adjustable, as stated above, any one of the transverse perforations can be brought into alinement with the central bore of the die in which the cutter blades or knives for fashioning the threads are formed, and held in such alined relation. The dies being interchangeable or adjustable to suit the diameter of the bolt or other article to be threaded, the guide bar thus forms an eiicient guiding means for any size of stock on which the tool is to be used. -It will be understood that each passage through the guide bar will have the same diameter as the bolt in connection with which it is to be used, so that, whether the die actually employed in the threading tool be designed to lit large stock or small stock, or be adjustable to fit various sizes of stock there will'be a guide passage in the guide bar of a diameter to correspond therewith. Heretofore it has been customary to employ for a similar purpose a number of interchangeable washers arranged to lbe held in alinement with the central bore of the die by means of a suitable support attached to the frame or body of the tool. These washers were made of equal outside diameters but of different inside diameters in order to fit the different sizes of bolts and the like on which the tool was to be used. These washers were made removable so that they could be interchangeable, according to the size of stock that Was to be worked, but

I as these washers were necessarily of small size it was hard to keep them from getting lost or misplaced, with resulting inconvenience and delay.

By means of my improved guiding attachment for threading tools, the above disadvantages are obviated, as I am enabled to use but a single piece and at the same time secure all the adjustments that are required in practice.

Reference is to be had to the accompanying drawings forming a part of this specilication, in which the same characters of reference indicate the same parts in all the views.

Figure 1 is a bottom plan; Fig. 2 is a side elevation of one form of my improved therefor; Figs. 3 and 4 are similar views of a modified form; and Fig. 5 is an end elevation of the modification shown on Figs. 3 and 4.

My threading tool comprises a central frame or body l, in which is removably mounted a die of the usual type, which may be of adjustable diameter, if desired, indicated by the numeral l. At each end of the frame 1 is formed a raised boss or bearing 2, having alined perforations to receive a bar 3, the ends 4 serving as handles. The central portion of this bar 3 is indicated by the numeral 3', and is held in such position by means of the bosses 2 that it lies centrally across the forward or working face of the die l. This central portion has a number of transverse perforations 7, which pass through it from one .side to the other. These perforations are of different diameters and are preferably arranged in the same plane. The numeral 8 indicates a similar number of perforations, which pass through the central portion 3 of the bar 3,'in a direction different from the first series of perforations or transverse passages 7. The largest of the passages or perforations 7 is shown at the left on Fig. 1, and the largest of the passages or perforations 8 is shown at the right; hence, by passing from left to right along the top of the bar 3, with the bar in the position shown on Figs. l and 2, and then from right to left along the side of the bar, one takes in the entire range or series of perforations and passages from the largest to the smallest. The bar 3 is held in adjustable position by means of a screw 9, or other threading tool with the guiding attachment suitable means, passing through the frame or body 1 from vany suitable position. This bar is both longitudinally and rotatably mounted in the bearings 2, so that it can be moved from right to left, or turned around 5 its longitudinal aXis to bring any one of the openings 7 or 8 in alinement withthe central bore 5 of the die, to suit the size of the stock or bolt to be worked. The die 1. is, of

course, chosen according to the requirements 10 of-working conditions, and is held in place in the frame 1 by means of a screw 10, or other suitable means.

I preferably arrange the axes of the holes 7 in one plane and the axes of the holes 8 in another plane which may makel any suitable angle with the first plane. In this way I am enabled to form a comparatively large number Aof holes over a short length'of bar, and

it is not necessary, in order to utilize my attachment, to increase the size of the tool,

orV otherwise makeV it unsuitable or clumsy for use. Y

Init-he modification shown on Figs. 3 and 4, the frame 1 has a pair of handles 4 proijecting therefrom at its opposite ends.

These handles may be made integral with the frame, or may be otherwise attached thereto; and the guide bar 3 is formed as a separate piece and supported in the bearings or bosses 2 in the ends of the frame l out of the plane of the handles 4. The openings 7 andvfS pass through the sides of the guide j^ bar 3, the planes of the two pairs of openings being at right-angles to each other, as

shown in Figs. 1 and 2. In this form I make the guide bar 3 square in cross-section, and the perforations in the bosses 2 are correspondingly shaped. 9 is a binding screw passing through the frame 1 and en- 40 gaging the side of the guide bar 3 within one of the bearings 2, to hold the guide bar 3 in its adjusted position.

Referring Ltoy the form shown on Figs. 1 and 2, I may make the bar 3 round, as shown, Yor I may make it square or polygonal in cross-section. I. may also vary the relative location of the transverse passages f 7 and V8, as it is not necessary that these openings should be formed so as to lie in two different planes, as shown andL described. Any relative arrangement which will allow of a sufhcient number of these openings to be formed within a comparatively short length of bar will do; or I may even arrangel these openings in such a way that their outer ends will lie on a spiral passing around the outside surface of the handle 3, if desired.

In the form shown on Figs. 3, 4 and 5, it

i is obvious that I may give the bar 3 any reholds-true with regard to themodication shown on the first two figures, as I do not care to restrict myself to a round bar if a bar of a different shape should be necessary.

It is to be observed that the holes 7 form one group, the members of which are arranged longitudinally of the bar; and that the holes 8 form another group, the members of which are also arranged longitudinally of the bar. These two groups form a single series of holes; and the members of the group 7 decrease in size in passing longitudinally of the bar in one direction; while the members of the group 8 decrease in size in passing along the bar in the opposite direction.

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

1. A threading tool comprising a frame containing a die, and a guide bar held crosS- wise adjacent the forward or working face of the die, said guide bar having a plurality of transverse passages of different diameters through it, said passages being arranged in different radial and in different transverse planes, to permit a considerable number of passages to be formed in a comparatively short length of bar, said bar being adjustable both longitudinally and rotatably with respect to said die, to bring any one of said passages into alinement with the bore of the die.

2. A threading tool comprising a frame containing a, die, and ay guide bar held crosswise adjacent the forward or working face of the die, said guide bar having a plurality of transverse passages of different diameters through it, part of said passages forming a group, the members of which are arranged longitudinally of said bar, and the remainder of said passages forming another group, t-he members of which are also arranged longitudinally of said bar, the end members of one group being formed adjacent the corresponding end members of the other group, said bar being adjustable both longitudinally and rotatably with respect to said die, whereby any one of said passages can' be rought into alinement with the bore of the 3. A threading tool comprising a frame containingV a die, and a guide bar held crosswise -adjacent the forward or working face of the die, said guide bar having a series of transverse vpassages of different diameters through it, said passages being arranged in pairs, the axes of the members of each pair intersecting each other, said bar being adjustable longitudinally and rotatably with respect to said die, whereby any one of said passages can be brought into alinement with the bore of the die.

4. A threading tool comprising a frame containing a die, and a guide bar held crosswise adjacent to the forward or working face of the die, said guide bar having a series of transverse passages of dierent dianieters through it, the axes of part of said passages lying in one plane, and the axes of the remainder of said passages lying in another plane, each of the passages in one plane intersecting one of the passages in the other plane, whereby a considerable number of said passages can be formed in a comparatively short length of said bar, said bar being adjustable longitudinally and rotatably with respect to said die, whereby any one of said passages can be brought into alinernent with the bore of the die.

In testimony whereof I have signed my 15 name to this speoiication in the presence of two subscribing witnesses.

JAMES MORTIMER CARPENTER.

Witnesses:

VERONICA F. WALSH, HENRY A. GREENE.

Copies of this patent may be obtained for ve cents each, by addressing' the Commissioner of Patents,

Washington, D. G.

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