US468929A - Adjustable drawing table or desk - Google Patents

Description

(No Model.) 3 Sheets-Sheet 2.

W. COUHRANE.

, ADJUSTABLE DRAWING TABLE 0R DESK. No. 468,929. Patented Feb. 16,1892.

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W. OOGHRANE. ADJUSTABLE DRAWING TABLE 0R DESK.

No. 468,929. v Patented Feb. 16, 1892.

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THE mmms PETERS C0,, wow-urns WASHINGTON, 0 c4 UNITED STATES PATENT OFFICE.

XVILLIAM' COCHRANE, OF PHILADELPHIA, PENNSYLVANIA.

ADJUSTABLE DRAWING TABLE OR DESK.

SPECIFICATION forming part of Letters Patent No. 468,929, dated February 16, 1892.,

Application filed October 28, 1891. Serial No. 410,054- (No model.)

To aZZ whom it may concern.-

Be it known that I, WILLIAM OocHRANE, of the city of Philadelphia, and State of Pennsylvania, have invented a certain new and useful Improvement in Adjustable Drawing Tables or Desks; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming part of this specification.

My invention has relation to drawing-tables or adjustable reading and writing desks; and it consists in the device hereinafter particularly described.

The object of my invention is to provide a compact adjustable drawing board or desk in which the outer board upon which the sheet is to be placed for drawing or the book or other paper in reading maybe adjusted at any desired angle by a simple movement of the hand.

My improved device is designed for the drafting-room, office, school, or home.

In the accompanying drawings, similar letters of reference refer to similar parts throughout.

Figure 1 is a perspective view of my improved device placed and supported upon a table. Fig. 2 is a perspective view of my improved device with the drawing-board proper removed therefrom to illustrate the mechanism for vertically adjusting the board. Fig. 3 is a rear perspective view illustrating further the mechanism for adjusting the board and for securing it at any desired angle. Fig. l is a rear view of the supporting-board. Fig. 5 is asectional view on the line :0 x of Fig. 1', representing the pivotal connection of the drawing-board with the fixed board.

A is a lid or board connected by a hingejoifi't h to a base or standard O-such, for instance, as the case or desk represented in the drawings-though the standard may be of any construction. A drawing-board B is adjustably connected to the hinged board A pivotallythrough the medium of the bolt or pivot 13, connected with the sliding plate V, adapted to slide on the hinged board A, guided by the fixed rods 0. The construction is such, as hereinafter described, that the board B may be turned pivotally 011 the pivot 12 to any desired position, as for drawing purposes, and. also may be raised or lowered in its relative position to the hinged board A, through the medium of the sliding plate V and retained in any given position to which it may be adjusted. The angle of the board B relatively to the base or standard 0 may be regulated to any desired extent by raising or lowering the hinged board A by means of the bars or supports 5, as hereinafter described. About the center of the rear of the hinged board A a roller D is journaled in the journal-bearings d, preferably tight, and cords a a are wound around the roller D in opposite directions and pass over pulleys or rollers d, with their outer ends secured to opposite ends of the slide V. The cords, if desired, as when the board-B may be weighty, can be given a turn or two around the pulleys d to better retain the board Bin position.

The drawing-board B, as before stated, is pivotally secured to the slide V through the medium of the bolt or pivot p. In order that the board B may be retained in any desired position to which it maybe pivotally adjusted on the slide V, a nutp is preferably provided on the inner end of the bolt 19, and when thenut p is properly regulated it binds the board 13 upon the surface of the slide V or upon any shoulder which might be provided between the two sufiiciently tight to hold it in any position and yet allow it to turn. As the board B is raised or lowered to any desired position, by a simple movement of the hand upon the same it is retained in that given position by the cords a a, provided on the roller D and connected at opposite ends to the vertical slide V. As the slide V is raised, the roller D is turned in a given direction by the unwinding of the cord 0., and at the same time the cord a, being provided on the roller in the opposite direction, is wound upon the same in the same movement.

Angular adjustment of the board B is accomplished through the medium of the hinged board A, supported by the bars b, .which are secured at one end to the interior of the hinged board A and at one or both ends in racks, as 70 70', provided on either the board A or the standard 0, or both, so that the angle of the board by adjustment of the bars I) may be readily regulated.

In the construction shown in the drawings the bars I) are secured to the board A through the medium of fixed longitudinal guide-rods Z, which pass through eyes 6, provided onthe upper end of the bars I), which allows of the upper ends of the bars Z) being raised or low ered on the board A and fitted in any desired notch of the rack 70, the bases of the bars I) belng also provided and securedin racks 7c in the base 0.

On two sides of the board B, I preferably provide fixed rods W for securing, adj ustably, the opposite ends of cords or elastic bands S, which may be shifted up or down upon said rods W for holding the pages of a book or sheet to the board B, adapted to be adjusted according to the size of the book or sheet.

When my device is desired to be used as a reading-desk, a rest of any ordinary construction may be provided at the lower end of the board B for the book secured to the said board by any well-known means, as by pegs 1n the orifices 0, provided in the said board.

I have described herein a particular construction of adjustable drawing-board and illustrate a construction of. standard. I do not limit myself, however, to the particular construction described, as other forms of construction may be employed without deviating from my invention.

Having thus described my invention, whatI claim, and desire to secure by Letters Patent,

1. In a drawing-board orreading-desk,a lid or board connected by a hinge or other joint to a base or standard and means for adj usting said lid or board at any desired angle to said standard, a slide provided in guides upon said board, pulley D, journaled to said board, and cords secured at opposite ends to said slide and adjusted around and upon said pulley or roller, and an adjustable board pivotally secured on the exterior of the hinged board to said slide, substantially as described.

2. In an adjustable drawing-board or reading-desk, the combination of aboard secured by hinged joints to a base or standard provided with adjustable supports for retaining said board at any desired angle to the said standards, a slide-plate provided on guides to said hinged board, a roller jonrnaled to said hinged board, cords provided on said roller and wound in opposite directions passing around fixed pulleys provided in the upper and lower end of said board, respectively, said cords secured attheir outer ends to the said slide, and a board provided on the exterior of the hinged board pivotally secured to the said slide to provide for the desired pivotal adjustment of the said board upon the hinged board, substantially as described.

3. In a designing board or desk, a board A, secured by hinged joints to a base or standard and means for securing the same at any desired angle to the said standard, slide V,

provided in said board upon guide-rods r, pulley or-roller D, journaled in journal-bean.

in gs cl to said board A, pulleys d, cords a a, Wound on said pulley or roller D, passing around said pulleys d, and secured at their outer ends to said slide V, and board B, pivotally connected through the medium of the bolt 19 to the slide V, substantially as described.

4. In a drawing-board or reading-desk, a hinged board A, hinged to a base or standard 0 through the medium of the hinges h, vertical rods r, provided in said board, slide V, provided on said rods r, roller D, journaled to the rear of the board A through the medium of the journal-bearings d, pulleys d, provided at opposite ends of the said board, cords a a, secured to said slide V at one end and wound upon said roller D, adj ustable board B, pivotally secured to the slide V through the medium of the bolt 19, securing-nutp', and bars I), provided inracks as a means for supporting said hinged board A and regulating the desired angle thereof, sub-,

stantially as described.

5. In a design board or desk, a board A,

secured by hinged joints to a base or standard, bars Z), adj ustably connected to said board A, and racks for engaging said bars for securing said board A at any desired angle to the standard, slide V, provided in said board upon guide-rods 'r, pulley or roller D, journaled in journal-bearings d to said board A, pulley d, cords a .a', provided on said roller D, Wound in opposite directions, passing over said pulleys d, and secured at their outer ends to said slideV, and board B, pivotally connected through the medium of the bolt 19 to the slide V, substantially as described. 6. In a drawing-board or reading-desk, a hinged board A, hinged to a base or standard G through the medium of the hinges h, guide-rodsw', provided in said board A, slide V, provided on said rods 4", roller D, journaled to the rear of the board A through the medium of the journal-bearings d, pulleys cl, provided at opposite ends of the said board, cords a a, secured to said slide V and upon said roller D, adjustable board B, pivotally secured to the slide V through the medium of the bolt 19 and securing-nut p, and bars I), provided in racks 7c 7r, said bars secured to said boardA through the medium of thejjgied guide-rods Z passing through eyes secured to the upper end of said bars, substantially as described.

In Witness whereof I have hereunto set my hand this 2lth day of October, A. D. 1891.

4 IVILLIAM COOIIRANE.

Witnesses:

JAMES B. GIVIN, HORACE PETTIT.

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