US2426480A - Punch aligning lens - Google Patents

Description

Aug. 26; 1947.

R. v. WOOD. ,P-UNCH LENS- ALIGN ING Filed Jan. 12, 1946 Patented Aug. 26, 1947 UNITED STATES 11 Claims.

This invention relates to a punch aligning lens for usei'n makingtne initial punch marks on a sheet of metal whichisto-be drilled and cut to formirregular shapes.

In making templets or patterns for cutting irregular shapes or for making short runs of those shapes themselves, the common practice is to draw the desired shape with a scratch line on a sheet oi metal. It is then the practice to drill holes quite close together to one side of this scratch linean-d then tobreak out'the part along the holed line. It is desired to have the holes as close together as practicable and it is well known that the drill tends to run sidewise, into the adjacent h01,*l11'11$5 the plate is initially punched to guide the drill. Anexperienced workman can place the punch mares near. to, the scratch line and closely adjacent eneanother so that the drilling may be accurately done,

I-he "lens or" the instant invention enables the inesper-ienced -;and those with little mechanical ability topl ace the-punch marks evenly close to th scratc-hline andtc-evenly space them with respect to one another as accurately as the es- ;cerienced mechanic cando. 'The lens of the instant invention alscenables the experienced mechanic lt-o lineup the punchholes much more quickly and accurately.

The -le-ns,:is primarily a right cylinder with a spherical -=top, and with a hole through its axis which serves as a uide tor a punch. A small circle or other index is inscribed on the bottom of the right cylinder, the'mag'nified bottom of the hole also serves asgan index. The lens is placed on the pattern so that the operators eye is substantially in line with the punch and magnified bottom hole index is placed in registi'cn'will be a parent from the description and I the accompanying drawing forming apart hereter with the scratch line on the pattern and then the punch is given a light tap with a hammer. The lens may then be moved around the pattern curve, placing the circle index on the preceding mark, and the hole index again lined up with the scratch line and another tap is given the punch. By this operation of successively aligning th index with the pattern curve, successi e punch marks may be placed on the pattern the desired space apart and the desired distance from the scratch line, The spherical top of the lens magnifies the scratch line and the indices to make it easy to bring them into accurate register, and the lens itself holds the punch in exact vertical alignment with the plane of the pattern to always 7 direct th punch exactly Where the lens has located it.

Other objects and advantages of the invenof and in which:

. Figure 1 is a side elevaticn of the lens and punch.

Figure 2 is an enlarged vertical sectional view of the lens placed upon a pattern.

Figure 3 is a top plan view of the lens of Fi-gure 2.

Figure 'isan'inverted plan View of the lens of Figure 2.

Figure 5 is a sectional View of the lens and punch'oi Figure '2 on line 5-5.

Figure 6 is a tap plan view of a pattern showing the lens in operation.

Figure 7 is a fragmentary plan View similar to Figure 6.

Figure 8 is a fragmentary plan view or "a pattern after drilling.

In the drawing similar-numerals refer to similar parts througl'ieut the several views.

' The right-cylinder lens l a cylindrical body 2, and aspherical top Ewi-th ehole Q drilled through its axis. Through this hole passes a punch member ii i a hardened point :6. The "punch ii closely fits the hole to accurately guide th 0n the ba-se the lens is cut out at 'l' to forma down rardiy projecting circular 1pcrtion ii, which. is angles to the axis of the lens and which forms a for the lens on a pattern which is precisely at right angles to the of the lens. Within the circular portion of the lens at l is inscribed or cut fa circle the diameter 'of whichis abeut-twiee that of hole A-sheetmeta1 plateill has th outline ii of the templet or pattern scratched thereon of the particular pattern shown. It is desired to cut out line H and again place the bottom of the hole 4 tangentially to the line II and with the circle 9 over the prior punch mark and again hammer the punch to make an impression on the plate I0. He is guided in the distance of the punch marks apart by placing the preceding punch mark on the circle 9. g This spacing of the punch marks with respect to one another and from the line H is substantially that needed to space the drill holes apart the desired amount, and the desired amount from the line I I.

The spherical top of the lens greatly enlarges the bottom of hole 4, the -circle 9 and the line H, and also the preceding punch marks to make them easy to locate and thereby the lens enables an accurate spacing of the punch indentations with respect to one another and the scratch line In Figure 3 the circle 9 is shown enlarged as it appears through the top of the lens. The actual size of the same circle 9, on the enlarged scale of Figures 2, i, and 5, is shown at 9. The lines formed by the step between the base support 8 and the underside of the lens I are so refracted by the lens as to be outside the line of vision of the operator looking vertically downwardly upon the lens. He does not see these lines forming the base. He only sees the enlarged bottom of hole 4 and circle or index 9. In Figures 6 and. '7 the line I l, as it is viewed through the lens, is shown displaced outside the line H, with themagnified bottom of hole 4 tangent to it.

After punching the holes in the plate with the punch of the invention, the sheet may then be drilled out, leaving holes 12 therein, accurately spaced apart and accurately spaced from the line H along the drill line. The inside portion of the sheet I may then be broken out.

Various materials and combinations of materials may obviously be used to make the lens of the invention, and various modifications may be made in the shape of the lens and the location of its magnifying spherical section and other changes may be made without departing from the invention.

What is claimed as new and is desired to be secured by Letters Patent is:

1. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, and a base on said lens to support the lens with its axis vertical to a plane.

2. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and an index of location on said lens, said index being magnified by said lens.

3. An aligning lens having a punch hole through, the axis thereof, a punch slidable in and guided by said hole, a base on said lens to supportv the lens with its axis vertical to a plane, and means on said lens whereby its location with re- 4 spect to indicia in said plane may be determined, said means being magnified by said lens.

4. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and an index of location on the base side of said lens.

5. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to sup port the lens with its axis vertical to a plane, and a circular index of location on said lens, said index being magnified by said lens.

6. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and a circular index of location on said lens; concentric to the axis thereof,'said index being magnified by said lens.

7. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and a circular index of location on the base side of said lens.

8. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and a circular index of location on the base side of said lens, concentric to the axis thereof.

9. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support thelens with its axis vertical to a plane, and means on the base side of said lens whereby its location with respect to indicia in said plane may be determined.

10. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and. circular means on the base side of said lens whereby its location with respect to indicia in said plane may be determined.

11. An aligning lens having a punch hole through the axis thereof, a punch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and circular means on said lens concentric. with the axis thereof and magnified by said lens whereby the location of the lens with respect to indicia

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