US356908A - Geoege w - Google Patents

Description

(No Model.)

G. W. WEISS.

COMBINED BLAGKBOARD AND DESK.

Patented Feb. 1,1887.

N Pertes. Phewumgnher. waimgzw. n. c.

llniTnn STATES PaTnNT Orrien GEORGE W'. WEISS, OF BROOKLYN, NEW YORK.

COMBlNED BLACKBOARD AND DESK.

SPECIFICATION forming part of Letters Patent No. 356,908, dated February l, 1887.

Application filed October il, 1886. Serial No. 915,865.

.To @ZZ when?, t may concern:

Be it known that I, GEORGE W. Weiss, of Brooklyn, in the county of Kings and State of New Yo1k,liave invented a new and Improved Combined Blackboard and Desk, of which the following is a full, clear, and exact description.

My invention relates to a combined blaclzboard and desk, and has for its object to provide a board capable of being automatically turned upon its axis to present at pleasure either face thereof to the front and in providing means for securing said board in alignment with the frame after each revolution.

The invention'has for its object also to introduce below said board, within the same frame, a hinged leaf, and providing a device for locking the same when not employed in avertical position, and supporting and locking the leaf when desired for use as a desk or table in an inclined or horizontal position.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this speeication,in which similar letters of reference indicate corresponding paris in both the figures.

Figure l is a front elevation of my combined blackboard and leaf, and Fig. 2 isa transverse vertical sect-ion through line w a: of Fig. l.

In the construction of my combined blackboard and desl; Iprovide a frame consisting of the uprights A A,top bar,B,and central stay or brace, B. lVithin the said frame,between the top bar, B, and brace B thereof, I oentrally pivot a two-faced blackboard, C,the upper pivotal pin or axis, c, of which, extending upward through the top bar, B, is provided at its extreme end withahorizontal handbal', d, or other forni of gripping device, Vand between the upper edge of the board and the under edge of the top bar the said axis c is further provided with a drum, D, the top bar, B, being usually recessed to receive the saine.

Under the drnni D, and attached to the upper aXis,c,a. ratchet-wheel,d,is ordinarily provided, said ratchet-wheel being located below the top edge of the blackboard in a recess, d2, formed therein. TWithin said recess d a (No model.)

spring-actuated pawl, a., is pivoted, adapted to bear upon the top edge of the board and engage the said ratchet-wheel d.

The standard A is apertured above the brace B to receive a pin, E, provided with a lug, e, against which lug a spring, e', secured to saidv standard, is made to bear. Each end of the blackboard, at a point in alignment with said pin E, is provided with an aperture, e2, adapted to receive said pin, and upon opposite sides, over that portion of the board thus apertured, metallic plates f are secured, to prevent the pin E from wearing or marring the side and edge of said board upon entering its proper aperture when the board reverses, as will be hereinafter set forth.

To the right, upon the face of the standard A', a torsion-spring, F, is coiled around a vertical shaft, F', held to turn in suitable hearings secured to said standard, the upper end of the said spring being secured to a drum, f', attached at the top of said shaft, while the lower end of said spring rests upon a plate fastened to the shaft F, and is secured to the standard A.

A cord, G, of catgut, wire, or other suitable material, is secured to the drum f at one end, and, extending horizontally above the board, is made fast at its other end to the drum D upon the axis e. The said spring, shaft, and cord may be dispensed with and au ordinary barrel-spring be used, in direct eonnection with the drun1,instead,without departing from the spirit of my invention.

In operating the board the drum D is turned until a strong tension is obtained upon the spring F. The pin Eis then disengaged from the board, whereupon, through the bearing of the ratchet-wheel upon the pawl secured to said board and the expansion of the released spring, the blackboard is swung around and its other face presented,and as the end touches the spring-actuated pin E the said pin springs into the aperture therein, holding the board rigid again. rihe board can be thus made to turn upon its axis until the spring becomes relaxed, when, through the medium of the grippingbar d, the tension may be renewed.

To the face of the central brace, B', I hinge a leaf, G', adapted to hang,when in its normal position, parallel therewith between the said IOO uprights A and A', the said leaf being provided along its ends, from the top to about the center, with 'a series of apertures, g, in the saine longitudinal line.

Between the ends of the leaf G and the uprights A and A', and to the inner side of said standards near the bottom, are pivoted braces H H,adapted to extend. up ward within a sho rt distance of the central brace, B', the said braces H and H' being properly stayed by the longitudinal bars IL, and each provided with an aperture at the upper end.

The standard H, next the upright A, is provided centrally with a lug, h', in which is fulcrumed alever,K,having an integralinwardlyextending pin, l, purposed to enter the top aperture of the said pivoted standard H and the upper aperture in the leaf G. The opposite standard, H', is also provided with a lug, h2, located near its pivotal point, to which lug is pivoted a lever, K', whose upper end is also provided with an inwardlyextending pin, k', the purpose of which is to enter the top aperture of the standard H' and the upper aperture of the leaf at that end. The said pin It' is, however, made to extend outwardly beyond the upright A and terminate in a handle. The two levers K and K' are connected by a horizontal bar, i. As will be seen from the above description, the table is now securely held in its normal position.

When wanted for use as a desk, the pin 7c' is drawn outward, and by means of the connected levers the opposite pin, Z, is also simultaneously disengaged from the leaf. With the other hand the leaf is lifted until the desired inclination is reached, the pivote/d standards being meanwhile brought forward parallel with the edge thereof. The pin k' is then made to engage the proper aperture in the said edge of the leaf upon one side, whereupon the pin Zalso engages a similar aperture upon the other, and a complete desk is formed.

The horizontal connecting-rod z' is provided with a spring, XV, attached thereto to automatically engage the pins 7c and Zwith the end apertures, g, of the leaf G'.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-m l. The combination, with the pivoted board C, having its upper pivot, c, provided with a handle, d, drum D, and ratchet-wheel d', and a spring actuated pawl, a, pivoted to said board, of a torsion-spring, F, held uponavertical rod, F', provided with an attached drum, f', said drum f', connected with the drum D of the pivot c by a rope, G, and means for locking said board, substantially as shown and described, and for the purpose herein set forth.

2. In a combined blackboard and desk, the leaf G', hinged to the center cross-bar, B', be-

tween the uprights A A', and provided with means, substantially as herein described, for locking` said leaf in a vertical position and supporting and locking the same in an inclined or horizontal position, as set forth.

3. In a combined blackboard and desk, the co1nbination,with the hinged leaf G', provided with the side apertures, g, of the united pivoted braces H and H', the levers K K', pivoted to said braces and provided with lockingpins Z and it', the rod t', limiting said levers, and the spring WV, as shown and described, whereby the said leaf can be locked in a vertical position and supported and locked in an inclined or horizontal position, as set forth.

4i. A combined blackboard and desk conA sisting of the uprights A A', top bar, B, and central brace, B', the leaf G', hinged to said brace, the pivoted braces H H', the attached and connected levers K K', carrying lockingpins l and k', the pivoted board C, provided with the spring-actuated drum D, the ratchetwheel d upon the pivot c, and the pawl a, pivoted to said board, and means for locking said board, substantially as shown and described.

GEORGE WEISS..

"Witnesses:

ANTHONY DELLMEYER, WM. T. LUsTY.

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