US355643A - Map-holder - Google Patents

Description

, (No Model.) J. DU SHANE.

MAP HOLDER.

Iva-355,643. Patented Jan. 4, 1887.

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tion.

"UNITED STATES PAT NT men.

JAMES DU SHANE, OF SOUTH BEND, INDIANA.

MAP-HOLDER.

SPECIFICATION forming part of Letters Patent No. 355,643, dated January 4, 1887.

' Application filed August 14, 1885. Serial No. 174,423.

To all whom it may concern:

Be it known that I, JAMES DU SHANE, "of South Bend, in the county of St. Joseph and State of Indiana,haveinvented certain newand useful Improvements in Map-Holders; -and 1 do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part ofthis specificatiou,in whioh Figurel is a front view of my improved mapexhibiting device complete. Fig. 2 is a central vertical section of the same. Fig. 3 is a cross-section on linexw,Fig. 2. Fig. 4 is a detail of the clutch-block and detent.

This invention relates to improvements in devices whereby maps and charts may be readily spread and shown; and it consists in the construction and novel arrangement of parts hereinafter described, and pointedout in the appended claims.

The scope and object of the invention will be better understood from the following explana- Maps are usually made in sets,and each map is provided with a spring-roller, which largely increases the cost of a set. In this invention one device is capable of properly actuating all the maps of a set, and the said device is, moreover, both of simple and cheap construction.

' Referring to the accompanying drawingsby letter, A designatesa map secured to a roller, A, as shown. The roller has at one end a pin, a, and at the other a cap, a, provided with an angular bearing-opening, (1 The pin a rests in a proper bearing in the block B, which supports the corresponding end of the roller.

B is a block similar to the block B, and supporting the opposite end of the roller.

0 isa short shaft, the end of which is made pyramidal, as shown in Figs. 2 and 4, and enters the opening a in the cap a. The shaft 0 turns in bearings made in the block B and in a bracket, 0, secured thereto by the ears 0 c. Surrounding the shaft 0, between its bearings, is the coiled plate-spring. D., which has one end secured to the bracket 0 and the other When the map is pulled down so as to unroll, the spring Dis put under tension. The roller A turns with the shaft 0.

(N0 model.)

and provided on the circumference with the notch E, having the rounded shoulders e. The notch E is so rounded at its bottom and shoulders that the pointf will not engage Within it if the motion of the roller be quickly reversed, but will jump from shoulder to shoulder.

Fisa detent pivoted upon the clip or bracket 0 above the clutch-block, and having a detentpoint,f,which is designed to enter the notch of the clutch-block and prevent thelatter from rotating. The detent F overhangs the clutchblock, the detent being engagc'd by gravity.

Each map of a set has a pin, a, at one end of its roller, and a cap, a, at the other; but the blocks B B, shaft 0, and actuating devices may besecured to a frame, B", of which the blocks B B will form the end pieces, or they may be secured directly to the wall.

To put a map in position for use, the end of the roller A, having the pyramidal bearingopening a is'partially engaged on the pyramidal end of the shaft 0, the shape of the opening at and end of the shaft 0 permitting the opposite end of the roller to be raised until its pin a can be inserted in its bearing in block E is a clutch-block secured on the shaft 0,

B. When the roller is thus placed in position,

and the map is kept unrolled by the detent.

and clutch-block. and roller be quickly reversed, the detentpointf will jump from one rounded shoulder 0 across the notch to the other. .By drawing the map slightly down the shoulder 0 will throw the pawl or detent aside, so that upon quickly reversing the motion of the map the catcher notch will escape the detent and the map will roll up. The locking device thus acts automatically to retain the map in-any desired position or completely rolled up.

The invention is of great practical use in schools, and where one frame can be made use of to show successively a number of maps, and the maps are stored away when not in use.

It is obvious that by the described construction of the exhibiting device for the maps a great saving is effected in that I dispense with a spring-roller for each map, and by forming the bearings of the rollers as described they If the motion of the map can be easilyput in place on the holder-frame or removed therefrom for substituting another 7 or for storage. By having the holding mechanism for the maps in the several rooms of a building one set of maps may be made to serve for all classes by taking the map and its roller from one room to another, as desired.

f, and engaged with the clutch-block by gravity, substantially as specified.

2. The combination, in a device for exhibiting maps, of the roller having suitable supports at each end, the removable shaft at one end of the roller, hav'inga pyramidal innerend, the cap on the end of the rollerhaving an opening or' recess corresponding to said pyramidal end for. the insertion thereof, the clutch-block E, secured to the short shaft and provided with the notch E, having the rounded shoulders e e, the coiled spring rotating the short shaft, and the pivoted detent F, engaging the clutch-block by gravity, and provided on its edge with the point fisubstantially as specified.

In testimony that I claim the foregoing as my own I afiix my signature in presence of two witnesses.

JAMES DU SHANE.

Witnesses:

CHARLES W. WILEY, WILLIs A. BUGBEE.

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