US 2419134 A
Description (OCR text may contain errors)
April 15, 1947. N. HALL 2,419,134
LOCATOR UTILIZABLE IN FORMING METAL ARTICLES Filed June 17, 1944 ZSheets-Sheet 1 H6 8 INVENTOR. N51. 50h H171. L
April 15, 1947. N. HALL 2,419,134
LOCATOR UTILIZABLE IN FORMING METAL ARTICLES Filed June 17, 1944 2 Sheets-Sheet 2 31 40 5 Z 45 1 Y E FIG. 11
- FIGS 60 INVENTOR.
. NEL 50H HfiLL I BY g Z,%; n
Patented Apr. 15, 1947 LOCATOR UTILIZABLE IN FORMING METAL ARTICLES Nelson Hall, Detroit, Mich. Application June 17, 1944, Serial No. 540,847
This invention relates to a forming articles of metal, wood or other character hereinafter termed a locator. The purpose is to provide a device securable to a piece to be formed by means of which all finished surfaces thereof are to be located in respect one to another and its location may be indicated on the engineering drawing and provides a point or center in which all measurements on the drawing may be related thereto. In the manufacture of the article the locator is positioned on the casting or other material to be formed corresponding to the position shown on the drawing and therefore is utilizable by the draftsman in making the layout shown by a drawing and the locator itself may be utilized in the construction of the device and in checking the part subsequent to completion of construction., The locator may be made integral with the part to be formed or removable subsequent to formation of the part and replaceable in the checking of the formed part.
These and other objects and features of the invention are hereinafter more fully described and claimed and shown in the accompanying drawings in which- Fig. 1 is an elevation showing the preferred form of the locator.
Fig. 2 is an elevation partly in section showing the locator applied to the work.
Fig. 3 is an illustration of the device located in an oversized aperture for a purpose hereinafter described.
Fig. 4 is a. similar elevation showing the device means utilizable in as utilized with a bushing in an aperture of greater diameter than the portion of the device insertible therein.
Fig. 5 is an elevation showing the device supported in a piece of work by a clamp.
Fig. 6 is a perspective view showing the manner of its use in the location of a cuttin tool relative to a piece of work to be formed thereby.
Fig. '7 is a perspective view showing the 10- cator as applied to a piece of work in which apertures and surfaces to be finished are at an angle one to another.
Fig. 8 is a perspective view showing the 10- cator as applied to another character of work piece.
Fig. 9 shows the relation of the device in respect to a taper bored work piece. 7
Fig. 10 is an end view showing the locator positioned on a part having angular side surfaces.
Fig. 11 is an end view ofa part complemental to the part shown in Fig. 10 and provided with a way having angular side walls which may be assembled with the part shown in Fig. 10.
"Fig. 12 is a plan of an element adapted for the receiving of shafts to be positioned at an angle one to another.
Fig. 13 is an elevation cator.
Fig. 14 shows a curved piece of work requiring apertures to be drilled therein at various angles and indicates the manner of use of the locator in determining the spacing of the apertures.
The locator in its preferred form consists of a ball like portion I having a base 2 with its under surface 3 at a predetermined distance from the center of the ball and a cylindrical shank 4 extends outwardly from the base and may be introduced into an aperture in a piece of work as shown at ie in Fig. 2.
There is a recess 5 between the fiat lower face 6a of the ball and the upper face 5 of the base 2 whereby the device may be held as by means of a clamp. The groove or recess 6 may also be utilized in removing the device as by means of a lever introduced thereinto. The device may be provided with a threaded aperture 1 to receive a threaded element in securing the device to a piece of work.
The utility of the device is illustrated in Fig. 6 wherein the ball I has its terminal portion 4 introduced in an aperture or recess provided therefor in the work piece A. The ball end provides a means for locating the side and end portions 51), 61), lb and 8 of the work piece and a cutting tool 9 is set in position to operate on the surface lb by means of a measuring block H! which may engage the ball I on one side and on the opposite side engage the face of the tool 9. To finish the surface of the end portion -8 a measurement is taken from the ball to locate the line H and this surface 8 is then milled to the line I I, the tool being held at an angle at which the surface 8 is to be formed after the manner indicated in finishing the surface lb. This is continued until the necessary surfaces of the work are finished. Thus with this single reference point all sides of a compound angle block for instance may be finished accurately with a few simple measurements.
In the work piece shown in Fig. '7 the ball is utilized as a point from which the surfaces i2 to i9 inclusive of the projecting members are determined and others, such as the surface 253 and the position of the apertures 22 l, 22 and 23. All these measurements are taken from the ball as a center. The surfaces and apertures are in proper relationship one to the other and are more accurately and quickly determined than is the case where no reference points, such as the ball 5, is utilized.
Another character of work piece is shown in Fig. 8 in which are the projecting members 2 5, 25, 26, 2? and a depression 28 to be formed in the thereof showing the 10- surface of the block. In the formation of this work piece the locator l is positioned in the block 24 and the sides of the block are machined in respect to the ball I as well as the positions of the several parts. 'If it is necessary to remove the locator when the fixture is in use and to replace it for conditioning, altering or inspecting it to preferably mounted in a bushing 29 as shown in Fig. 4.
In the arrangement shown in Fig. 9 the chuck 28' holds a taper bored piece of work 29a and the locator I is mounted on a pedestal 32 carried by the chuck. Thus the taper is readily determined by means of a block 33 indicated in dotted lines and the face of the work is determined from the surface of the ball as indicated at 3| and likewise the thickness of the workpiece indicated by the numeralSZ-i.
Fig. 10 shows the upper part of, a dovetail? with the ball i set with its surface coinciding with the line-36 and the-surfaces 34 and 38 are measured from the surface of the ball as indicated at 35 and31.
Fig. 11 shows the mating part of the dovetail shown in Fig. 10. In Fig. 11 the ball I is set on the base 34- so that the surfaces wand 45 are measured from the surfaceof the ball as indicated at 4 I and 43 which are thesame as the measurements 35 andtl of Fig. 10with the key 42 in place.
In Fig. 12 is shown the plan and in Fig. 13 the elevation of a piece of mechanism in which 43a is. the bed plate having brackets 434a and 65a having holes drilled for the shaft 99 and similar holes in. the similar bracket 44a. The ball I is so positioned that. the shaft axes meet at the center of the ball thus eliminating calculation and'reducing the number of measurementsto be made from the'ball. It is also to be noted that the apertures iortheshaft 59 for the worm and 52 for the worm wheel 59 are also determined from the ball i as a center whichbecomes a universal reference.
In all cases of use of the device it isthe ball end which provides the center of measurement and from which all finished parts are to be located.
By reason of the stem 33a being less in diameter than the aperture 32a, as shown in Fig. 3, the ball'element may be adjusted laterally of the center of the aperture and, by means of the calipers, such as'shown in Fig. 14, the ball element 36amay be set in the desired position.
Upon removal of the calipers a drill may be positioned to be moved into the aperture 3211 on the axial line of the ball subsequent to removal of the ball element 36a and parts connected therewith. Thus the aperture 32a is centered in respect to an adjacent aperture. By this arrangement the successive apertures may be accurately positioned relative one to the other as may be required.
One of the problems arising in drilling holes in curved parts, especially in stream line structures, is the'locating oi the centers as will be understood from the following:
The aperture or hole M is first drilled at a desired point in the part 56 to receive the stem 4 of the locator. The hole 32a is then located approximately with respect to the aperture of the hole 66 and is drilled larger in diameter than the diameter of the stem 33a of the locator. The locator is slidably positioned and secured in place by means of the screw I! and washer 59. It may then be tapped slightly to position the ball end relative to the ball end of the locator in the aperture 64 to final position as determined by the micrometer 61.
It then isclamped solidly in place by the screw.
The part 54 is thereafter positioned so that the axis of the locator aligns with that of the drill spindle. The locator is then removed and the hole 63 bored to size. This method is repeated with other holes to be formed in a curved surface.
A special form of thev locator i shown at 58 in Fig. 14 in which the ball is not provided with a stem but is secured in place by means of a long screw 60 extending through a Washer 59a for. clampingthe same in place.
In Fig. 14 the ball 51 is shown as unprovided with a stem and a strap 55 is utilized to hold the ball. A screw 56 passes through the strap into the work piece 54. Another form of clamp is shown at the right hand side of the figure wherein an aperture is provided in a curved surface. In this arrangement one end of the retainerv strap 55. engages the locator I and. is supported at its opposite endby block 67a to position the strap in a plane at a right angle to aperture 95. Like means may be utilized in determining the position for the'aperture 65.
The several illustrations indicate a few of the possible uses of the locator as well as various forms thereof particularly in respect to positioning the same in or on a work piece. It is tobe'understood however that the locator may be used in many ways not here shown but obvious to a workman acquainted with the utility of the device.
Having thus fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is:
1. A device for the purpose described, comprising an element having a terminal portion at one end for engagement in an aperture, the opposite end being of a ball-like form including a base for seating in fixed relation with the surface of an element having an aperture to receive the said terminal portion, the outer surface of the base being at a distance from the center of the ball equal to its radius, the ball end providing a station for locationof other portions of the element in which the ball is seated.
2. A locator for the general purpose described, comprising a ball-like element, a stem therefor, a flange on thestem for engaging the work, the surface of the flange engaging the Work being spaced from the center of the ball a distance equal to its radius.
3. A locator for the general purpose described comprising an element having a ball shaped portion and a stem extending radially therefrom, the stem having a fiange'providing a surface for engaging the surface of a work apertured to receive the stem, there being a groove between the flange and the ball-like end portion to receive a tool for removal of the device from the work piece.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PA'IEN IS Number Name Date 1,296,195 Laessker Mar. 4, 1919 1,536,734 Tanner May 5, 1925 1,394,004 Gould Oct. 18, 1921 1,101,601 Wendt June30, 1914 1,329,234 Evans Jan. 27, 1920 1,253,680 Giern et al Jan. 15, 1918 2,178,293 Wogeck- Oct. 31, 1939