US370939A - fraitkenbera - Google Patents

Description

(No Model.)

2 Sheets-Sheet 1.

E. FRANKENBERG.

POLYPANTOGRAPH.

Patented 00k. 4, 1887.

WITNESSES:

A TTOHNEYS.

N FEYHS, Plwwulhognphan Washington, D C.

2 Sheets-Sheet 2.

E. FRAHKENBERG.

(No Model.)

'POLYPANTOGRAPH.

No. 370,939. Pate nted Oct. 4,1887...

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ATTORNEYS,

N. PETERS Photo-Lflhogn hur. Wnhingmn. D. c.

. of their size.

'UNITED STATES PATENT OFFICE.

EDUARD FRANKENBERG, OF HANOVER,- PRUSSIA, GERMANY.

POLYPANTOGRAPH.

SPECIFICATION forming part of Letters Patent No. 370,939. dated October 4-, 1887.

Application filed April 1, 1857. Serial No. 233.318. (No model.) Patented in Austria-HungaryJune 12,1887, No. 5,919 and No. 25,321.

To all whom it may concern.-

Be it known that I, EDUARD FRANKENBERG, of Hanover, Kingdom of Prussia, Empire of Germany, have invented certain new and useful Improvements in Polypantographs,(which has been heretofore patented to me by the Government of Austria-Hungary by Letters Patent No. 5,949 and No. 25,321, dated June 12, 1887,) of which the following is a specification.

This invention relates to certain new and useful improvements in instruments used for reducing or enlargingdrawings or figures; and the object of my invention is to provide an instrument of this kind by means of which drawings can be enlarged or reduced, and at the same time any number of duplicates of the original or enlarged or reduced drawing produced. I

The invention consists in the combination of pivoted bars, all as will be fully described and set forth hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of my improved instrument for enlarging or reducing drawings, the same being adjusted for reducing drawings to one-half Fig. 2 is a plan view of the instrument adjusted to reduce drawings to onefourth the original size. Fig. 3 is a cross-sectional view of the instrument shown in Fig. 1. Fig. 4 is a diagrammatical top view of the wellknown pantograph, which is also used for enlarging drawings. Fig. 5 is atop view of my improved instrument for reducing drawings, the same being adjusted for reducing drawings to one-fourth of their original size; and Fig. 6 is a diagrammatical top view of the instrument, giving a graphic representation of the different positions of the parts.

Similar letters of reference indicate corresponding parts. r

Fig. 4 shows the usual pantograph, in which dis the pivotal point, on which the instrument must be turned; f, the point at which the stylus is held for following the lines of the drawing to be enlarged or reduced, and at z the pencil is held for drawing the enlarged or reduced drawing. In many cases it is necessary that the pencil should be outside of the point z, and this cannot be done with the ordinary pantograph. These objections are over- The flat bars A B and B G are pivoted to each other at B. The rods F D and D E are pivoted to each other at the point D, and are pivoted to the rods 0 B and AB at the points F and E, respectively. The points G, D,and A.

are in a straight line, and thepoint A is the pivotal point on which the entire instrument is turned, and if the instrument is turned on said point the points 0 D will describe like lines-that is, lines either having the same curvature-or the same direction-for the reason that the triangles Q B A and D E A have like angles. The-figures or lines described by the points 0 D will be in the same proportion to each other as the line C A is to the line D A.

A like system of rods, A B, B O, F D, D E, is arranged adjacent to the rods A B, B O, F D, and D E. The points F F are connected by a bar, F F, and the points E E are connected by a bar, E E, as is shown in the diagram'matical view, Fig. 5, and in the plan view, Figs. 1 and 2. It is thus evidentthatparallel movements must always take place. It is also evident that if the instrument is shifted the points D D will have the like movements or describe like lines. The points E E can be connected by a rod, E E, and it is evident that this rod will describe the same point or movement as the points E E.

Instead of placing the pencil that is to draw the figures at D D, the pencils may be placed on the bar D D at any point between the points D D, or on an extension of the bar D D, and at all times the pencil will describe the same figures as the point D.

It is also evident that any suitable number of pencils can be fastened on the bars, and they will describe the same figure as the points D D, and the figures described by the pencil or pencils on the bar D D will be similar in shape to the lines or figures described by the points 0 C, but will be smaller. The points 0 C can also be connected by means of a bar, 0C, and the stylus, which is drawn over the figure to be copied, can belocated at any part of the bar 0 O, or an extension thereof, and any number of pencils may also be fastened on the bar 0 0, so that at the same time that the stylus is carried over the figure to be copied or drawn a number of copies of the IOO same shape and configuration are made by the series of pencils held on the bar 0 G-that is, a number of copies of the original are made.

By means of this instrument I am thus enabled to make a number of copies of the original drawing at the same time, and at the same time I am enabled to make a number of copies of the same drawing on a reduced scale. Fig. 1 shows this apparatus for making drawings reduced one-half; but to permit of adjusting the apparatus for different sizes of drawings the different bars are provided with holes, through which the pivots H, Fig. 3, can be passed, which carry rollers N, running on the paper.

In the construction shown in Figs. 1 and 2 the points A A are on the bar A A,which is fastened by suitable means on the drawingtable. The bar D D is provided with an adjustable forked piece, 0, which can locked on said bar D D, and carries a pencil on each end, thus permitting of drawing two reduced figures atthe same time. The stylus that is passed over the figure to be copied is held on the end 0 of the bar 0 B; or, as shown in dotted lines, it may be held on the bar 0 C, the same as in Fig. 5. If desired, the sheet can be fastened on the part 0 and the pencil remain fixed. The sheet is thus shifted under the pencil by the carrier 0 and bar D D, and the drawing will also be copied.

It is evident that the fixed arms G G G2 of the rod D D describe the same circles or lines as the bar D D.

The above-described implement can be used for the following purposes: First, for transmitting movements in the same direction with or without duplication and with any desired increase or decrease of said movements; and, second, this instrument can be used for making copies of an original drawing in the same size, and making one or more copies in a reduced or larger size.

If a series of the above-described instruments are connected to each other in different planes, each can be used in making copies in a different plane.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an instrument for making enlarged or reduced drawings or duplicate copies of drawings in a reduced or enlarged scale, consisting of the bars A B, B O, D F, D E, pivoted at the points B, D, E, and F, respectively, the bars A B, B C, F D, and D E, pivoted to each other at the points B D E F, and of the connecting-bars F F, E E, connecting the points E E and the points F F, substantially as shown and described.

2. In an instrument for making enlarged or reduced drawings or duplicate copies of drawings, consisting of the bars A B, B O, D F, and D E, pivoted at the points B D E F, respectivel y, the bars A B, B G, F D, and D E, pivoted to each other at the points B D E F, the connecting-bars F F, E E connecting the points E and E and the points F and F, and of the connecting-bar D D, for connecting the points D D, substantially as shown and described.

3. In an instrument for making enlarged or reduced drawings or duplicate copies of drawings, consisting of the bars A B, B O, D F, and D E, pivoted at the points B D E F, respectively, with the bars A B, B O, D F, D E, pivoted to each other at the points B D E F, the connecting-bars F F, E E, connecting the points E and E and the points F and F, the connecting-bar D D, for connecting the points D D, and the bar A A, connecting the points A A, substantially as shown and described.

4. In an instrument for making enlarged or reduced drawings or duplicate copies of drawings in a reduced or enlarged scale, consisting of the bars A B, B G, D F, and D E, pivoted at the points B D E F, respectively, with the bars A B, B O, D F, D E, pivoted to each other at the points B D E F, the connecting-bars F F, E E, connecting the points E E and F F, the connecting-bar D D, for connecting the points D D, the bar A A, connecting the points A A, and the bar GO, connecting the points 0 O, substantially as herein shown and described.

In testimony that I claim the foregoing as myinvention I have signed my name in presence of two subscribing witnesses.

EDUARD FRANKENBERG.

\Vitnesses:

B. ROI, ALEX SCHOLZE.

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