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Publication numberUS275822 A
Publication typeGrant
Publication dateApr 17, 1883
Publication numberUS 275822 A, US 275822A, US-A-275822, US275822 A, US275822A
InventorsLevi A. Hagaf
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for copying and enlarging pictures
US 275822 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

L. A. HAGAN.-

' DEVICE FOR COPYING AND BNLARGING PICTURES. N0. 275;822. Patented Apr.-17, 1883.

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LEVI A. HAGAN, OF JACKSONVILLE, ILLINOIS.

DEVICE FOR COPYING AND ENLARGING'PICTURES.

SPECIFICATION forming part of Letters Patent No. 275,822, dated April 17, 1883.

(X0 model.)

To all whom it may concern:

, Be it known that I, LEVI A. HAGAN, now of Jacksonville, Illinois, have made a new and useful Improvement in Devices for Copying and Enlarging Pictures, of which the following is a full, clear, and exact description, reference being bad to the annexed drawings, making part of this specification, in which- Figure 1 is a plan or face view of the improved device; Fig. 2, a similar view, the glass and the transparency being turned back Fig. 3, across-section taken on the line 3 3 of Fig. 1, and Fig. 4 an end elevation of the device.

The same letters denote the same parts.

I have heretofore (May 24, 1881) obtained a patent for an improved devicefor copying and enlarging pictures, a portion of which consists in a tablet forholding the picture being copied, the tablet being provided with a vertical and a horizontal graduation, by means of which the picture can be marked oft'in squares. The tablet is used in connection with a drawingboard for holding the paper upon which the picture is copied, the drawing-board having graduations corresponding to those upon the tablet, and for the purpose of marking the paper in squares corresponding to those upon the original picture. In the device referred to itis necessary to mark the squares directly on the original picture. Thisis sometimesobjeetionable; and to obviate this difficulty is the aim of the presentimprovement, which consists mainly in the use, in connection with a tablet graduated as described, of a transparent sheet which is ruled in squares corresponding to one or bothof the graduations of the tablet, and which in use is placed over the picture to be copied, and when thus placed serving to designate the various parts of the picture as if the squares were drawn directly upon the picture, as understood more readily by referring to the drawings, in which A represents the tablet for holding the picture to be copied. A series, B, of spaces is laid off vertically on the tablet above and beneath the space a, occupied by the picture; and another series, 0, of spaces is laid offhorizontally on the tablet at the sides of the picture space, as in the former construction above referred to.

D represents a trausparentsheet, preferably a sheet of isinglass. It is marked 0E into squares d d (1, corresponding to the outer set of the graduations B G of the tablet. The sheet I) is preferably permanently attached to the tablet, but in such manner as to permitof the picture being placed beneath the sheet. The preferable mode is to confine the upper end of the sheet to the tablet by means of a suitable fastening-strip, d.

The operation is as follows The picture E to be copied is laid upon the tablet over the space a, and, if desired, secured to the tablet. The transparent sheet 1) is then turned down over the picture. Then to protect the sheet D, which otherwise might be injured in use, a sheet of glass, F, is laid over the sheet D. The glass F is preferably permanently attached to the tablet, but in such manner as not to interfere with the manipulation of the sheet D and the picture E. The preferable practice is to hinge the glass at its upper end,

and by means ofthe stripfto the tablet. The lower end of the glass can be confined by means of the detachable strip G. In thus confining the glass, the sheet 1) and the picture E are also suitably confined. The glass and the sheet D both being transparent, the picture can be seen, and the squares d of the sheet serve for the time being to mark the picture as desired. Then the picture has been copied, the glass and sheetD are loosened, and the picture withdrawn from the tablet. The sheetD being marked off, as described, the tablet is conveniently arranged for use, it only being necessary to insert the picture and secure the sheet D and glass F.

I claim 1. The combination of the tablet A, the marked transparent sheet D, and the glass F, for the purpose described.

2. The combination of the tablet A, the

marked transparent sheet D, the glass F,

hinged to the tablet, and the confin in g-stri p G, substantially as described.

L. A. HAGAN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5673489 *Feb 14, 1996Oct 7, 1997Robell; GlennGridded measurement system for construction materials
US5842280 *Oct 6, 1997Dec 1, 1998Robell; GlennGridded measurement system for construction materials
US7389589 *May 26, 2006Jun 24, 2008Cindy DeboldComposition transfer proportional drawing grids
US7926188Jan 28, 2009Apr 19, 2011Thorkelson Gregg BSystem and method for creating purportionately accurate figures
US20060265888 *May 26, 2006Nov 30, 2006Cindy DeboldComposition transfer
US20090211104 *Jan 28, 2009Aug 27, 2009Thorkelson Gregg BSystem and method for creating purportionately accurate figures
Classifications
Cooperative ClassificationB43L13/16