US333211A - John s - Google Patents

Description

(No Mode-1.)

J. S. FOX.

STANDARD FOR. MAPS AND CHARTS. No. 333,211. Patented Dec. 29, 1335.

NrTnD STATES PATENT OFFICE..

JOHN S. FOX, OF OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-HALF TO J. I. GARLICK, OF SAME PLACE.

STANDARD FOR MA'PS AND CHARTS.

SPECIFICATION forming part of Letters Patent No. 333,211, dated December 29, 1885.

Application filed June 22, 1885. Serial No. 169,477. (No model.)

To a/ZZ whom, it may concern/:

Be it known that I, JOHN S. FOX, of Oakland, Alameda county, State of California, have invented an Improvement in Standards for Maps and Charts; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to a device for conveniently supporting and exhibiting maps, charts, or similar articles; and it consists of a vertically-extensible standard with a clamp- -ing device, an arm pivoted at the top, so that it may be made to stand either vertically or transversely, with a means for retaining it in position, and adjustable clamp supports or hangers, by which the map or chart is suspended from the bar.

Referring to the accompanying drawings for a more complete explanation of myinvention, Figure 1 is a view of my device. Fig. 2 is a horizontal section taken through the verticalv extension-post and the holding-clamp. Fig. 3 is an end view of the map-supporting arm or hanger, showing the adjustable holding device.

A is a vertical standard having a base consisting of anfextended tripod or legs, B, which may be secured in a socket, C, by bolts and nuts, as shown, the foot of thestandard being centrally secured in the upper part` of the socket. This standard has a vertical channel formed in one side of it, which may be dovetailed or made wider at the inner portion than it is at the outer, as shown in Fig. 2.

D is a vertical sliding bar, which is formed to fit the channel in the standard A, so that it may slide up and down, and at the saine time to be held in place and kept from falling out. The rear portion of the standard A is slotted out through, and a bolt, E, has one end secured in the sliding bar D, while the other end extends through the slot, and a plate, F, having a nut which screws upon its end outside of the plate F. The plate F has its edges turned at right angles, so as to fit and slide accurately in small grooves, which are made upon the rear angles of the standard A, and this, together with the 'peculiar manner in which the standard is slotted and the two 5o parts are fitted together, causes the movable portion to slide up and down with great steadiness, and it can be easily held at any desired height by simply turningthe nut G, which clasps the plate F and draws the two parts of the standard firmly together.

H is a bar having its center pivoted. to the upper end of the sliding portion D of the standard, and it has a circular disk secured to its rear side, so as to turn against the front of the standard D and steady the bar in its movements. A plate, I, is secured to the standard D just below the disk, having its upper edge curved to correspond with the curve of the disk, so that the latter is supported by it as it turns.-

J is a semicircular curve having its ends secured in the lower edge of the transverse bar H, its curve being formed on a radius from the pivot-pin upon which the bar turns. A guide, K, is xcd to the standard D, and the semicircle slides through this guide when the bar is turned to a horizontal or vertical position. When not in use, the bar K is turned, so as to stand vertically in line with the bar D, and when it is to be used it is turned until it reaches a horizontal position. Upon the back portion of the semicircle a notch, L, is cut, and an elastic plate or spring, M, is secured to the front of the bar D, near the guide, through which the semicirole moves, so that when the bar has reached a horizontal position the spring falls into the notch, thus holding it rigidly and preventing its turning in either direction. By pressing the spring inward the notch in the semicircle is released from it, so that the bar can be easily turned to a vertical position.

In order to suspend maps or charts from the bar, I employ hangers N, which are fitted to slip upon the ends of a horizontal bar, H, the

opening being enough wider than the thickness of the bar to admit a at arched spring, O, which presses against the back of the bar and the back of the hanger with sufficient force to hold the hanger at any point that may be desired upon the bar, while at the same time, by the exercise of considerable pressure, it may be caused tol slide along to any point on the bar Where it is needed. One of these hangers may be tted upon each end ICO of the bar H, and they projectto the front, as shown, having slots I formed in them, suitable to receive the end pivots of the map or chart. When these charts are mounted upon rollers with springs, which will cause them to roll up when released, they are held by these hangers, so that the map or chart may be extended and exhibited, or it may be allowed to roll up closely, and be held upon the standard when the horizontal arm is turned in 'a vertical position, thus forming a map-holder, so that the map is always in proper position for use. If desired, maps may be provided with strings or loops, which can be suspended from the hangers when the maps are not pro-' vided with automatic rollers.

I am aware that a verticallyadjustable standard having pawl-and-ratchet mechanism for holding it at different heights has been used, provided with a fixed transverse arm grooved so as to receive horizontal sliding bars for suspending maps, and I do not claim, broadly, such a device.

Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

1. In a map or chart support, the vertical standard having the dovetailed or enlarged slot formed vertically upon one side, and a correspondingly-formed sliding bar fitted in said slot, in combination with a pla/te having its edges turneddown over the standard, and

Y 3. In a map or chart support, the verticallyadj ustable standard, with a pivoted transverse arm, a guide,and catch, as shown, in combination with hangers fitted to slide upon said u arm, and spring-plates, by which the hangers are held at any point by compression, substantially as herein described. y

In witness whereof I have hereunto set my hand.

JOHN S. FOX.

Witnesses:

D. P. GRAY, WILL II. BURRALL.

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