US2341042A - Variable image beflecsfswg machine - Google Patents

Description

H. D. HILL VARIABLE IMAGE REFLECTING MACHINE Feb. 8, I944.

Filed Jan. 14, 194:5 y- 2 sheets-sheet 1 Feb. 8, 1944. l H. D. HILL 2,341,042

VARIABLE IMAGE REFLECTING MACHINE STAT E VRHLE l i REMEMG CHENE Herschel D. Hill, Spr'lilgeld, lll.

Application January 14, i943, ,r

3 Claims.

This invention relates to a machine especially for use by draftsmen, architects, engineers, and designers to view an image through translucent material disposed on a glass top, al1 or parts of a drawing, picture, or the like, with a change of scale thereof to another desired scale to facilitate tracing of such an image or study for comparative reasons such as style, size or color.

It is particularly aimed to provide a means which will effect the desired results more accurately and less laboriously.

More specifically I aim to provide a construction having a casing with a glass top and boards within the casing beneath the top, movable relatively to each other, one adapted to mount an object and the other having a lens and illuminating means whereby the object may be viewed through translucent material disposed on the glass top for tracing, study, or the like.

The more speciilc objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:

Figure 1 is a horizontal section showing the device with the glass top and adjacent parts -removed, being taken on the plane of line i--l of Mgure 2;

Figure 2 is a vertical sectional view taken substantially centrally along the line 2 2 of Figure l;

Figure 3 is a horizontal section taken on the line 3 3 of Figure 2;

Figure 4 is a horizontal section taken on the line fil-t of Figure 2; and

l t No. 472,422

Figure 5 is an enlarged detail section taken l vertically at one corner of the device.

Referring specicallygto the drawings wherein like reference characters designate like or similar parts, il] designates a suitable casing which may be made of metal or any other suitable material and which preferably is rectangular. This casing has a metallic bottom wall at Il, and across the top a transparent or diaphanpus panel i2 of glass or the equivalent is mounted in any suitable manner. A continuous reinforcing strip i3 is fastened within the casing l0 at the bottom and asimilar metallic strip It reinforces the top of the casing and is suitably fastened thereto.

Corner blocks it' are fastened below the bottom il, and journaled therein as well as in bearing plates I5 within the casing and bearing plates it within the casing are four vertically disposed shafts il, and inwardly thereof are journaled in bearings l5 and i6 four vertical shafts it. lThe shafts It are screws in that they have helical grooves i9, and nuts are threaded on shafts I8. Said nuts 2t are rigidly carried by an image board 2l of wood or any other opaque material upon which a drawing, photograph, or the like 22 may be disposed and fastened if desired;

Shafts il also are screws inasmuch as they have helical grooves 23 engaged by nuts 24, rigid on a lens board 25, the latter being of wood or any other suitable opaque material.

Centrally of the board 25 a lens or system of lenses 26 is disposed, being carried by a mounting 2l, mounted in an opening in said board 25. An outwardly inclined portion or shade 2B forms part of the holder 2.

The interior of the casing lil preferably is painted white and in order to afford sulcient illumination over the drawing, photograph, or other object 22 any desired number of lamps 29 may be mounted in any conventional way. As the amount of illumination will vary according to conditions and the particular object 22, the lamps are adapted to be lighted or extinguished in groups designated a, b, and c, so that one group may be lighted, or two, or all groups may be lighted, as desired. Electric current is supplied from any suitable source through feed wires at 30 and the current passes to the series of lamps a under control of a switch 3l, to series of lamps b under control of a switch 32, to series of lamps c under control of a switch 33, the wiring used being conventional. The lamps preferably are tubular and elongated as shown.

The shafts i8 are adapted to be rotated in the same direction in unison and they have sprocket wheels 34, keyed thereto traversed by an endless sprocket chain 2li'. Preferably two or any desired number of shafts it in their upper ends are provided with square or other sockets which are engageable by removable crank 36 insertable through suitable openings 3l in the glass l2 so that when crank 36 is operated, screw shafts I9 will coact with the nuts 20 to raise or lower the object board 2|, according to the direction of turning.

The screw shafts 23 also are adapted to be simultaneously turned in the same direction and to this end have pinions 38 keyed to the tops thereof and which are traversed by an endless sprocket chain 39. Preferably two, but any desired number, of the shafts 23 have sockets 4D in their upper ends, which are detachably engaged by a crank or key 4I insertable through openings 42 the glass I2 and brace strips I4 adjacent thereto.

Provision is made for inserting and removing a drawing, photograph, or the like, such as 22,

and to this end all or part of one side wall of the casing I is a closure. As shown in Figure 2 this closure is designated 43, being hinged to the remainder of such wall on a horizontal axis as at 44, and being held in a closed position by turnable latch 45 mounted on the closure and engagea-ble with the strip I4.

Itthus will be realized that through turning crank 4|, the screw shafts 23' and nuts 24 will raise or lower the lens board 25. Thus the lens board 25 andthe object board 2I are independently and relatively adjustable so that the lens or series of lenses 26 will enable view of the image through the glass I2 on any permissible or variable scale. Such image may be traced on cloth or paper, which is translucent, and placed over the glass and image, or the image simply may be viewed and studied for comparative or other purposes. It will be recalled that the degree of illumination is regulable since any group or any plurality of groups a, b, and c of the lamps 29 may be lighted as desired.

Various changes may be resorted t o provided that they fall Within the spirit and scope of the invention.

I claim as my invention:

1. A machine of the class described comprising a casing, said casing having a diaphanous panel, an object `board below the panel, a board -between said board and panel, lens means carried by the second-mentioned board, and means to move said boards relatively so that images on different scales may be viewed through said panel, nuts carried by the boards, screw shafts journaled in the casing and engaged by said nuts, a gearing connecting the shafts of the image board for simultaneous rotation, a gearing connecting the shafts of the second-mentioned board for simultaneous rotation.

2. A machine of the class described comprising a casing, said casing having a diaphanous panel, over which translucent material is adapted to be disposed, an object board below the panel, a board between said board and panel, lens means carried by the second-mentioned board. and means to move said boards relatively so that images on different scales may be viewed through `said panel and material, nuts carried by the boards, screw shafts journaled in the casing and engaged by said nuts, a gearing connecting the shafts of the image board for simultaneous ror tation, a gearing connecting the shafts of the second-mentioned board for simultaneous rotation, bearings within the casing for said shafts, certain of said shafts having sockets at their upper ends for engagement by cranks to rotate the shafts, said panel having openings therethrough to enable passage of the lcranks therethrough to engage and disengage the sockets.

3. A machine of the class described comprising a casing, an object board, a board above such object board, lens means carn'ed by the second-mentioned board, means to move said boards relatively so that images on different scales may be viewed, said means comprising nuts carried by the boards, screw shafts journaled in the casing and engaged by said nuts, gearing connecting the shafts to the image board for simultaneous rotation, and gearing connecting the shafts of the second-mentioned board for simultaneous rotation.

HERSCHEL D. HILL.

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