US1732613A - Tool and frame - Google Patents

Description

Oct. 22, 1929. w. J. PARSONS 1,732,613

' TOOL AND FRAME Original Filed May 27, 1924 ATTORN EY Patented Oct. 22, 1929 UNITED STATES PATENT OFFICE WILLIAM J. PARSONS, OF MILLERS FALLS, MASSACHUSETTS, ASSIGNOR TO MILLERS FALLS COMPANY, OF MILLERS FALLS, MASSACHUSETTS, A CORPORATION OF MASSA- OHUSETTS TOOL AND FRAME Application filed May 27, 1924, Serial No. 716,089. Renewed August 26, 1929.

This invention relates to tools, and more particularly to the frames therefor and the method of making the same.

The invention has for its object generally to provide an improved construction and arrangement of parts which will be eflicient economioal and readily manufactured.

Specifically an object of this invention is to provide a frame for tools, which is preferably made of sheet metal and the like and is sufficiently rigid to Withstand the various strains to which it may be subjected while in use.

Still another object is to provide an improved procedure whereby the frame may be made of sheet metal and formed into a suitable article possessing the desired oharacteristics by which it is adapted to provide the means for associating in cooperative relation the various members in tools and the like.

A further object is that of constructing a frame in any desired manner, which frame will be of particular value when employed in connection with drills and other similar hand tools.

A still further object is to be predicated to the construction of a drill of improved design.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the several steps and relation and order of one or more of such steps with respect to each of the others, and the article possessing the features, properties and the relation of elements, which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a view mainly in side elevation, but with parts broken away, showing a form of hand drill constructed to embody this inven tion;

Fig. 2 is a plan view of a blank adapted to be made into a frame for the tool shown in Fig. 1;

Figs. 3 to 7 inclusive show various views of the blank illustrated in Fig. 2, and depicting the several steps performed to shape it into a frame which has the final form shown in plan and end in Figs. 6 and 7, respectively;

Figs. 8, 9 and 10 show various forms of frames different from that shown in Figs. 1

As afore-stated, in the illustrated example, the invention has been shown as embodied in a hand drill. Thus referring particularly to Fig. 1, it will be seen that the reference numeral 10 indicates a tool frame which is supported by a handle 11 and which carries a sleeve 12 associated with a chuck 13. The latter is driven by means of a shaft 14 extending through the sleeve, and a pinion 15 is at tached to the inner end of the shaft and has its teeth meshing with the teeth of a gear 16, which may in turn be retained and rotated in any suitable manner, as for example by mounting the same upon a shaft or stud 17 and by placing a crank 18 in association therewith, this crank preferably carrying a handle 19 for its ready manipulation.

While this arrangement of parts is of particular advantage, and while the frame (hereinafter specifically described) may be formed in any desirable manner, it is preferred that this latter element be furnished by means of stamping and dieing operations.

Thus the frame 10 is made preferably from sheet metal or other suitable sheet material, and is formed to have a suitable configuration to support the stationary members of the tool; such as the sleeve 19., handle 11 and stud 17, these members being maintained in proper cooperative relation with the movable members such as the driving gear 16, shaft 14 and the pinion 15. The configuration also provides strengthening portions so arranged as to impart to the frame sufficient rigidity to withstand the stresses to which the tool will be subjected while in use.

Assuming that it is desired to form a frame of the character shown in Figs. 1 and 6, it will be understood that this element may be conveniently made from the plain blank shown at 20 in Fig. 2. The blank is subsequently shaped to have upstanding rims 21,

a depressed conical groove portion 22 and channeled ends 23 and 24 as has been clearly shown in Fig. 3.

As the ends 23 and 24 are to support the handle '11 and the shaft 14, respectively, it is desirable to shape them finally into the circular configurations indicated at 28' and 24, in Figs. 6 and 7, and with this in mind a further operation may be resorted to. 1 The finishedframe 10 illustrated in Fig. '6 thus has a shell-form with an upstanding edge which serves as a strengthening rib adapted to withstand thrusts and like stresses while the frame is in use. By closing in the edges of the channeled ends 23 and 24 to give them the circular contour shown at 23' and 24, these ends are formed, as it were, into splittubes, the tubular end 23 being well adapted to support the handle 11, while the-tubular end 24 is adapted to serve as a journal for the rotatable shaft 14: the depressed groove or recess at 22 providing sufficient clearance for the proper disposition of the pinion 15. I

The blank maythus be made from sheet metal by an ordinary blanking operation in a punch press and approximates inshape initially the ultimate form of the frame. The desired configurations to be imparted to the frame are preferably developed by suitable stamping and dieing operations, for example by cold dieing whichmay be accomplished by the aid of a die press. The rib or flange 21 and the groove 22 are with advantage formed by this operation; the channeled ends and 24 being preferably developed at the same time, while another operation is given them to develop the circular contour indicated in Figs. 6 and 7;

By the present invention it is readily perceived that, the strengthening ribs are not necessarily restricted to the peripheral portions of the frame, butmay be struck up from the body of the blank as indicated at 25 in Fig. 8. Here intersecting ribs are provided extending diagonally across the body of the frame or shell, and it will be understood that the provision of such ribs across the body of the frame imparts additional rigidity thereto and enables the frame to withstand greater stresses than the simple form shown in F 6. The preferred disposition of the ribs of this frame is, of course, along lines where the major strains are most likelyto develop. 7 I Fig.9 shows a further form of frame in which the space depressed to form the groove 22 in Fig. 3'is simply stamped or cut out to provide the open space indicated at 26. This form of frame is desirable at times where it is preferred to simplify the dieing operation. In Fig. 10 the circular frame ends are strengthened by uniting the adjacent edges of the side-slots in the tubular portions, for example by brazing or welding as has been indicated at 27, it being understood that when this form of construction is employed, it is unnecessary that members be utilized to confine the ends of the frame to prevent spreading.

A. frame provided by this invention is thus adapted to be formed by means of simple blanking and dieing operations. Care, however, is required in the dieing operation so as not unduly to weaken or thin out the parts. The portions struck up about the blank become, as it were, integral transverse beams for the frame well adapted to impart rigidity to the body thereof when employed in connection with a drill or similar tool.

In order that the ends 23 and 24 may be rolled over into circular form as shown in Figs. 7 and 8 without deleteriously straining the upstanding rim 21, it is desirable that the necks of the blank where these ends are formed shall be slightly recessed or cut away as indicated at 28 in Fig. 2. In this way the drag of the bent down end portions of the metal is removed from the upstanding rim 21.

By this invention it will be seen that the frames or tools may be quickly made in large quantities by stamping and dieing operations, and the need in tool frames of cast metal or of other special metals which have here- I tofore' been regarded as particularly adaptable for this purpose is entirely avoided.

The cost of making 'tool frames on a quantity basis is also greatly reduced. In thus attaining a more cheaply produced frame none of the qualities formerly desired in frames are sacrificed but rather enhanced; such frames being adapted to be readily finished by grinding, enameling, etc., as the case may be. The cold died frames are uniformly stronger and more robust than cast frames. By the use of'this invention moreover the problems of disposing of rejected casings and of manufacturing seconds in the tool line, are practically eliminated.

Finally, irrespective of the method adopted in constructing the frame, it will be understood that a drill is provided which ofi'ers numerous advantages over tools of this character as heretofore placed upon the market, it being noted, for example, that the parts will always be maintained'in their proper relative positions and that a spreading of the frame ends will be prevented incident to the confining action exerted thereon by the handle and sleeve, respectively. l urthcrmore, and particularly where a recessed portion forms a part of the frame,- the pinion or spur gear 15 is protected from injury on one side by this portion and on the other side by the gear 16.

Thus it will be understood that the objects of the invention are accomplished, and since certain changes in carrying out the above process, and certain modifications in the article Which embody the invention may be made Without departing from its scope, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention Which, as a matter of language, might be said to fall therebetvveen.

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

1. In combination a tool frame including a main body, tubular portions extending from said body, a handle encircling one of said portions, a shaft extending through and beyond another of the same, tool engaging means adapted to be associated with one end of said shaft, means cooperating With the opposite end of said shaft for driving the latter, and a sleeve encircling said last named portion of the frame for confining the same.

2. In combination, a tool frame, including a main body, a tubular portion extending from one end of said body, a handle associated with the other end of said body, said body and said tubular portion being formed of sheet metal of substantially constant gauge, said body being bounded by upwardlybent edge-portions of said sheet metal providing upstanding strengthening flanges, said tubular portion being formed by up- Wardlyand inwardly-bent edges of said sheet metal, a shaft extending through and beyond said tubular portion, tool-engaging means adapted to be associated With one end of said shaft, means cooperating with the opposite end of said shaft for driving the latter, and a sleeve encircling said tubular portion for confining the same.

3. In combination, a tool frame, including a main body, tubular portions extending from each end of said body, a handle associated With one of said tubular portions, said body and said tubular portions being formed of sheet metal of substantially constant gauge, said body being bounded by upwardly-bent edge-portions of said sheet metal providing upstanding strengthening flanges, said tubular portions being formed by upWardlyand inwardly-bent edges of said sheet metal, a shaft extending through and beyond the other tubular portion, tool-engaging means adapted to be associated With one end of said shaft, means cooperating With the opposite end of said shaft for driving the latter, and a sleeve encircling said last-named tubular portion for confining the same.

4. In combination, a tool frame, including a main body, tubular portions extending from each end of said body, a handle associated With one of said tubular portions, said body and said tubular portion being formed of sheet metal of substantially constant gauge, said body being bounded by upwardly-bent edge-portions of said sheet metal providing upstanding strengthenin flanges, said tubular portions being forme by upwardlyand inwardly-bent edges of said sheet metal, a shaft extending through and beyond the other tubular portion, tool-engaging means adapted to be associated with one end of said shaft, means including a pinion mounted on the opposite end of said shaft for driving the latter; said body having a depressed conical groove-portion for accommodating said pinion.

In testimony whereof I aflix my signature.

WILLIAM J. PARSONS.

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