US994410A - Desk attachment for chairs. - Google Patents

Description

H. A. KNOKE. DESK-ATTACHMENT FOR CHAIRS.

APPLICATION FILED DEG-1 1910.

994,410, Patented June 6,1911

A Nrrin) STATES PATENT OFFICE.

' .ER-MAN A. KNOKE, OF CHICAGO, ILLINOIS.

DESI I ATTACHMENT FOR CHAIRS.

Specification of Letters Patent Application filed IDecemlzver 1, 1910.

Patented Juno 6, 1911. I Serial No. 595,009.

To all whomit may concern:

eitizen of the United States, residing at Chi- .cago, 111 the county of Cook and State of Illinois, have invented a new and useful Improvement 1n Desk Attachments for Chairs,

. of which the following is a specification.-

My invention relates to an improvement in the class of desks or tables which are equipped with means for readily attaching them to chairs and permittin them, when so attached, to be conveniently adjusted to desired hei ht and angle and turned outof the way of tibstructing access to or rising from the. chair-seat. .In the accompanying d rawmg, Figure 1 1s a broken perspective view of a chair shown with my improved device attached to one of I its arms Fig. 2 is an enlarged broken section of the attaching means on line 2, Fig. 1; Fig. 3 is a similar View of the same on line 3 Fig. 4, and Fig. 4 is a similar, view of the same on line 4, Fig. 3; Fig. 5 is an enlarged broken sect-ion of the attaching means on line 5, Fig. 1, and Fig. 6 is an enlarged view in broken sectional elevation of the lower jaw port-ion of the attaching means. Y

The table or desk 7 is rigidly fastened at one end of its under side to an arm 8 having its outer end bent to extendat a right-angle and perforated to form abearing 9. An annular head 10 provided witha straight face 11 carries a stem '12 extending from that face to pass through the bearing 9, andprovided with a pin 13 which extends transvcrsely through its end-portion for the purpose hereinafter explained. On the stem confined, between the bearing and the head 10, a sleeve 14 having a recess 15 in one end presents a cam-face 18; and the collar is pro-' vided with a handle 19. The head 10 surrounds a post 20 shown in the preferred form of atube thre'aded at its ends for the application of a'c'ap 21 to its upper end, as

a finish, and a nut 22 to its lower end. The

lower part of the .post passes througl 'parah' lel perforated ears 23, 23 on the hack of a aw 24, having a clamp-screw 25 working in the outer end of its lower arm or member.

The jaw is secured in place by confining it with'the pin 13, with vof a rm.

f 1 between the nut 22 and a washerQfi surround- Be it known that I, HERMAN A. KNoKE, a 1 mg the post and engaged by a stop-pin 27 extending transverselythrough it. From the back of the jaw extend, parallel with each other, perforated cars 28, 28, like but at right-angles to the ears 23, to serve the purpose herei'nafter described.

\Vith the table 7 on the'post it is releasably clamped thereto by manipulating the handle to turn the collar 17 for engaging the cain 18 the result of tighten ing the collar against the bearing 9 and the latter against the sleeve 14 to force the ends ofthe recessed face of the sleeve against the surface of the post and thereby rigidly support the table on the post. The post, with the table upon it and carrying the jaw 24, may be fastened to an arm 29 of a chair 30 by causing the jaw to embrace the chair-arm andfastening it by tightening the clampscrew 25. 'ith the table-applied in the manner shown and described, it may, upon turning the handle to release the cam 18 from the pin 13 and thus free the parts controlled by the of the way of obstructing access to .or rising from the chair-seat and be adjusted to any desired position by raising or lowering it it to any sultable angle on theaxis 12; and when so adjusted it may be tightened by properly turning the cam-roller l7. v

The provision on therjaw'of the second set perforated cars 28 adapts the device to be attached to a chair-leg 31. For that purpose the nut 22 may be removed to permit the post to be withdrawn from the jaw-ears 23 and inserted through the ears 28, when the jaw is fastened in place by applying the nut. Thus the jaw is caused to extend at a right-v angle to its first-named relative position, in which it is illustrated in Fig. l, and is thereby adapted to be applied to the leg 31in the manner described of applying it to a chair- The manipulations for adjusting the table when thus supported on a chair-leg are the same as those described for adjusting it when supported on an arm of a chair.

\Vhat I claim as new and desireto secure lav-Letters Patent, is

"In combination, a desk, an arm secured to thedesk and provided on its outer end with a bearing, a post, an annular head adjustably confined onthe post and cam, be swung on the post out having a stem ere tending through said bearing for supporting pin, and supporting means on the post, for

the desk axially, a sleeve confined on the the purpose set forth.

stem between one side of the bearim and the r Y r 4 post and interlocking with the po st, a pin HERMAN OIXE' 5- on the stem, a collar rotataoly confined on In presence ofthe stem between said pin and bearing and JOHN VVILsoN,

provided with-a cam-face engaging with said R. A. SCHAEFER.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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