US2629271A - Material holder for drilling - Google Patents

Description

Feb. 24, 1953 F. c. FOSS 2,629,271

MATERIAL HOLDER FOR DRILLING Filed D60. 14, 1948 2 Sl-IEETS-SHEET l I Freeman 6. Foss mmvm;

BY MM 8% Feb. 24, 1953 F. c. Foss 2,629,271

MATERIAL HOLDER FOR DRILLING Filed Dec. 14, 1948 2 SHEETS-SHEET z A I 32 T 4 Fig. 4.

Q 1 40 0 I l 'h I 88 4 70 6 I I? 76 1' n 5a 6 m l l as f 74 Imam.

Freeman Gil-ass INVENTOR.

fa tentecl Feb. 24, 195.?

v UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to novel and useful immovements in attachments for drill presses and similar devices.

An object of this invention is to provide an improved attachment for use in holding firmly for drilling any material such as fiat, irregular or straight edged, round stock and other material of different shapes.

At present there is utilized various devices for performing similar functions of the present device. There are used jigs, iron blocks, wooden blocks, specially devised brackets, drilling Vises. However, in practical use a large part of the holding of metal for drilling is attempted to be done by hand, that is with a pair of pliers or some other similar mechanism. It has been found that such type of drilling is not only dangerous but inaccurate and tends to ruin drill bits as well as the very stock which is being drilled.

Hence, it is another prime object of this invention to retain a workpiece, whether it be round, square, irregularly shaped or the like in a manner whereby accurate and safe holes or other cutting operations may be performed thereon,

without the necessity of large, expensive and cumbersome holding devices.

Ancillary objects and features of novelty will become apparent in following the description of the preferred form of the invention andcertain of its various uses, as the description of the drawings proceed, wherein:

Figure 1 is aplan view of thepreferred form of the invention;

Figure 2 is an elevational view of the device shown in Figure 1, portions being broken away 1 "holding various types of stock. As an example, certain holding operations have been selected for illustration in the drawings.

However,- other types of stock maybe eiiicaciously held while heingdrilled to wit; the holding of a washer in order to enlarge the central aperture therein or in order to make a washer from a piece of stock. This ;is an extremely dificult operation due to the usually very small size of the washer. Of

; course, the capabilities of the apparatus are known only partially that is, for particular shops doing somewhat similar jobs repeatedly, the attachment may be adapted for holding certain parts, as in reaming bushings, removingbearing inserts etc.

The drill press indicatedgenerally at Ill is of conventional description and includes a table 2 with the usual column i l as well as other pertinent mechanism.

The attachment in order to be commercially feasible must be simple in structure. Hence, there is included only a minimum of elements. A base block or base I6 is provided in substantially circular shape for convenience and has a lower flange portion 13. This lower flange portion has a slot 28 therein communicating with a slot 22 formed in the bottom of the base. The flange portion 20 and the slot 22 is used for accommodation of the holding screw 2? of the drill press. Hence, the block l6 may be maintained firmly in place for more-or-less heavy operations and also for repeated operations.

A through bore (unnumbered) is provided in the block I6 and accommodates a rod 26 which has an upturned end portion 2-8. This rod is adapted to serve as a gauge for performing successive operations on a piece of stock as that shown at 3B. The stock having had one hole drilled therein after being center punched is disposed on the upturned end portion 28 (in the hole) thereby placing it with respect to the drill bit 32 and chuck member 34 in such a position so that a spaced second hole may be made therein at a predetermined distance from the first. If it is desired to make the holes successively in a piece of stock with more or less distance between the holes, it is only necessary to loosen A hollow handle 44) extends from the block 4:6, being fixed thereto. This handle has a pair of threaded apertures 42 and 44 respectively which are aligned, therein for accommodation'of a screw 46. It also has another aperture 48 therein accommodating the screw 50. These screws .are of the holding type in order to firmly fix the holder generally indicated at 52 thereto.

This holder 52 has a threaded opening (unnumbered) at one end thereof accommodating the screw 50 with a suitable turnin end member thereon. This is a tightener screw disposed at the end of the holder 52 so that it is spaced from the drill chuck and so that it is readily accessible. Manipulation of the screw 50 will pull the work retaining holder 52 against the stock and retain it firmly. The screw 16 has a nut 54 thereon in order to level the holder 52, being used particularly to adjust properly for different, depths or thicknesses of stock. V 3 A guide 58 is slidably disposed in a bearing- 66 formed integral with or fixed rigidly to the base block IS. The said die is preferably an L-shaped member which is retained in selected adjusted positions in the bearing 6|] by means of a. set screw 62.

. Another guide member which is preferably a fshown'at-w-and 10.

screw 64 is threadedly disposed in another bearing 66 also carried by the block [5. The screw 64 and guide 53 are slid-able in substantial parallelism in order that the side of a piece of stock may be guided to spaced points.

If it is desired to remove the rod 26 and substitute it by means of another type of gauge or guide, this may be accomplished as shown in Figure 4. Here a substantially U- shaped rod 68 is illustrated with one leg disposed in the bore and the other leg is disposed on top of the base block it. Hence, the piece of stock 1!] is retained at the end thereof by means of this rod 68. As discussed previously, the hold down screw 2 may be used to anchor the base or base block it. rims, it is also noted that the majority of work accomplished by the attachment in practical operation will be done while the device is being held manually. The handle 40 serves this purpose. On the other hand, if itis desired to permit the handle to simply strike the column 14 of .the drill press, this may be done. The torque of the pit a2 will urge the handle firmly against the column. j k i The holder being bifurcated at one end thereby forms an opening for the passage of the drill bit 32. Another passage or opening M is provided in the base block l6 serving the same pur- @058.

The bifurcated end portion or the holder 52 is smoothly curved from the outside edgestapering downward toward the opening formed by furcati'ons. Holding grooves 1 6 are provided in the under surface of each bifurcation adjacent the end thereof in order to'clarnp certain types of stock, such as the round stock schematically shown at 80. There is a flattened "portion of the bottom of the bifurcations on each side of the "grooves 16 for firmly clamping flat stock as that The innermost baclr portion '82 between the bifurcations of the holder is dished downwardly slightly as shown in Figures 1 and 3 and tapers inward'ly ingorder that a washer or other small article may be retained immediately thereunder so as to make the aperture in the washer larger 3'01: so as to actually form a washer from a small tion 82 between the bifurcations. The utility of taper is such that it is hig h enough'at the :front and tapers downwardly towardthe back in order to accommodate various sized bits 'softhat the cutting lip of the conventional bits will not -l'ap over on the holder 52 when seating the 'material for drilling. The tapering'is such that an individual can and does have 'best vision at the back portion of the holder that is possible in "order that the center punch mark commonly associated with drilling may be readily seen and yet not permit any of the bits of the necessary size to lap over.

When the holder '5': is rotated to a position somewhat similar to that shown in Figure 4 in rder that the base may be used as a bench iron,

the. clamp 52 rests upon the bearings 6'0 'a'ndtfi .i'especti'vely, balancing the holder. Hence, the

bearings serve 'adual function, that is to hold the members 6"6and 68 and also to support the actual tool holder 52 under certai'n operative conditions.

The actual shape of the holder is of major ii-mport'aince in the present device, since it is by this shape that various types of stock may be held.

4 It is not infrequent that the flat bottom surface of the holder and the grooves :6 as well as other variously configured portions of the device are called into play in order to hold a single piece of stock.

While there has been described and illustrated but one form of the invention, it is apparent that variations may be made without departing from the spirit thereof. It is also understood that many uses may be made of the described structure such as comin within the purview of a skillful operator.

Having described the invention, what is claimed as new is:

1. A work-holding device foruse with a drill press, said device comprising a block which is adapted to be secured to the table of the drill press, a work holder having furcations at one end thereof, an adjustment screw threaded in the opposite end thereof and contacting said block to raise and lower said holder with respect to the block, a pivot bolt carried by said block and passed through an opening in said holder intermediate its ends, a threaded element disposed on said pivot bolt and engaging said holder to press said holder downwardly toward the block to clamp a workpiece therebetween, said holder being pivotally operable to the operative andinoperative condition about the axis of said pivot bolt, said furcations having their upper surfaces downwardly and inwardly tapered from the inner ends thereof to the outer ends thereof and said furcations being tapered inwardly toward their inner ends said last-mentioned taper being with respect "to vertical planes passed through said furcations, and means disposed in the under surface of said furcations to accommodate a V workpiece.

2. A work holding device for use with a drill press, said device comprising a holder with furcations at one 'end, said furcations opening outwardly and tapered inwardly to a V-notch, the furcations beingrelatively thick at their outer ends to engage larger work, and tapered thinner toward the inner ends thereof, and the innermost portions of the furcations being dished downwardly and tapered inwardly to provide visions'pace near the V-notch during drilling operations, and "said holder having a reduced width handle extending therefrom substantially parallel to said furcations.

FREEMAN C. FOSS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,945,633 Swains'on-Brooke Nov. 26, 1912 1,536,310 Rothlisberger May 5,1925 2,240,230 'Schlichting i Apr. 29, 1941 2,260,708 -French Oct. 28,1941

2,269,727 Mead Jan. 13, 1942 2,322,707 Wetzler June 22, 1943 2,409,706 Rep'pa s Oct. 22, 1946 2,421,957 Mead June 10, "1947 2,422,114 Matter June 10, 1947 2,472,083 Bartholdy June '7, 1949 FOREIGN PATENTS Number Country Date "345,232 Germany Dec. 7, 1921 OTHER, REFERENCES American Machinist. Pa e 637, Aug. 26. 1897.

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