US801781A - Chart. - Google Patents

Description

No. 801,781. PATENTED OGT. 10, 1905. W. B. GLISSON.

GHART.

APPLIGATION FILED APR.27, 1905.

%Unusu n nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn oc lVILLL-\M BAXTER GLISSON, OF RUTHERFORD, TENNESSEE.

CHART.

Specfication of Letters Patent.

Patented Oct. 10, 1905.

Application filed April 27, 1905. Serial No. 257,708.

SON, a citizen of theUnited States, residingat Rutherford, in tle county of Gibson and State of Tennessee, have invented certain new and useful Improvements in Charts; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to charts, and more particularly to adjustable holders therefor.

The Object of the invention is to provide a chart-holding frame having means whereby a chart of considerable length can be rolled and unrolled and kept taut during such operation.

Another objectis to provide means for holding the chart at a desired inclination.

\Vith the above and other objects in view the invention consists of a sLmporting-stand upon which is rotatablymounted a stem projecting downward from a frame containing oppositely-disposed rollers. A chart in the form of a flexible strip is secured at opposite ends to these rollers and is adapted to be wound thereon and then unwound therefrom. Means are provided for simultaneously rotating the rollers and also for tightening the strip upon the rollers, so as to prevent it from sagging.

The invention also consists of the further novel constructions and combinations of parts hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings 1 have shown the preferred form of my invention.

In said drawings, Figure 1 is a perspective view of my improved chart-holder, a portion thereof being broken away, but indicated by dotted lines. Fig. 2 is a Central vertical section through the holder and showing a chart therein, and Fig. 3 is an enlarged section through the spring-pressed drive-sprocket.

Referring to the figures by numerals of reference, 1 1 are standards which support a head 2, having a centrally-disposed aperture 3, surrounded by a raised portion 1, constituting a bearing. The standards 1 are braced at a point below the head 2 by means of a connection 5, having a slot 6 therein and a depending loop '7. The bearing et supports a preferably rectangular casing 8, having its lower portion enlarged transversely, as shown at 9, and its upper portion similarly enlarged, as shown at 10. Between these enlargements and the opposite ends of the frame are removv able panels 11 ada )ted to be secured in any T N l 7 Be it known that I, W ILLIAM BAXTER (J LIsj suitable manner, as by means of buttons 12. lVithin the extension 9 is mounted a roller 13, to which is secured one end of a chart 1 1 in the form of a tlexible strip. This chart extends under a cross-red 15, secured within the frame adjacent roller 13, and the other end of the chart is fastened to a roller 16, which is arranged within the enlargement 10. A sp'ocket 17 is disposed outside of the frame and is secured to and rotates with roller 16, and mounted on this sprocket is a chain 18, which extends around a sprocket19, rotatably mounted on the shaft 20 of roller 13. The inner face of sprocket 19 is provided with shallow recesses adapted to receive pins 21, extending from the shaft 20, and the sprocket is held normally in engagement with these pins by means of a coiled spring 22, which bears at opposite ends upon rings 23 and 21, located on shaft 20. The ring 24, as shown in Fig. 3, is preferably integral with the sprocket 19. A crank 25 is connectcd to the end of shaft 20. A stem 26 projects downward from the center of frame 8 and is rotatably mounted in `the Opening 3 and slot 6. This sten is secured to frame 8 by means of a metal strap 27, which is secured to opposite sides of the stem and to the bottom of the frame and terininates in a bracing-strap 28, as shown in Fig. 1, said bracing-strap being secured to one side of the frame. That portion of the strap below the 'stem 26 forns a loop 29, to which is pivoted an angular strip 30, having one end of a looking-strip 31 pivoted to it. This locking-strip has a series of notches 32, any one of which is adapted to receive the yeke 7, and a handle 33 extends from the locking-strip, so that the same can be readily manipulated.

It will be understood that by raising and pulling forward the looking-strip 31 stem 26 can be swung in the Opening 3, thereby causing the frame 8 to assune an inclined position. It can be locked by replacing strip 31 in engagement with loop '7. Roller 13 can be rotated in either direction by means of crank 25, and rotary motion will be transmitted to roller 16 through chain 18. The chart 1 1 can therefore beunrolled :from one of the rollers and rolled on the other. Should it be desired ment thereof.

IOO

IIO

same will rotate within the sprocket 19, and thereby cause the lower roller to rotate independently of the upper one and take up any sag. This independent movement of the shaft and sprocket 19 is permitted because of the fact that the sprocket is locked to the shaft by the spring 22, which presses it against the pins 21. When suflicient pressure is exerted, however, the pins will force the sprocket laterally and permit of independent movement. It will of course be understood that either or both of the panels 11 can be removed to permit the examination of the chart.

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

1. In a device of the character described the combination with a support, of a chartholding frame mounted thereon; a stem depending from the frame and rotatably mounted within the support` said stem being also capable of swinging in the support, means for manipulating the stem and a securing de- Vice therefor.

2. In a device of the character described the combination with a support; of a chartholding frame mounted thereon and having holding frame mounted thereon and having its opposite faces removable, the opposite-ends of the frame being enlarged to accommodate a rolled chart, a stem depending from the frame and rotatably mounted within the support, said stem being also capable of swinging in the support, a strap secured upon opposite faces of the stem and to the bottom of the frame for holding the stem and frame together, a manipulating device pivoted to the strap, and means for securing said device in adjusted position.

, In testimony whereofIhave signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM BAXTER GLISSON. Witnesses:

J. A. ALFORD,

D. F'. GLIssoN.

Images