US490116A - Cabinet sewing-machine table - Google Patents

Description

UNrrED STATES aTENr EErcE.

THEODOR KUNDTZ, OF CLEVELAND, OHIO.

CABINET SEWING-MACHINE TABLE.

SPECIFICATION forming part of Letters Patent No. 490,1 16, dated January 17, 1893.

Application filed May 9, 1892. Serial No. 432,353. (No model.)

raising and lowering the head by manipula-t ing the folding leaf of the table.

With this objectin view my invention oonsists in certain features of construction and in combination of parts hereinafter described and pointed out in the claims.

In the accompanying drawings Figures l and 2 are front elevations, partly in section, the former showing in dotted lines the head in Working position and showing in solid lines the head depressed part-Way of its downward movement, the latter showing the head turned down below the line of the table top.

The sewing machine table is of the cabinet Variety, A representing the table proper, B B the end Walls, D the back Wall and C C the doors of the casing or cabinet. The fly-Wheel b is connected with the one end wall, as shown.

E is atilting platform, and on this platform is mounted and rigidly secured thereto, the machine, or so called head F. The tilting plat :form in its elevated or horizontal position, is iiush with the table and fits nicely in a somewhat large and usually central aperture A made for the purpose, in the table top. Platform E has laterally projecting axial trunnions e, located near the right hand end of the platform and these trnnnions operate in short horizontal grooves a, constructed in the internal edges of the table, whereby the trunnions may move a limited distance endwise of the table, that is, in the direction toward and from the plane of the {1y-Wheel.

Gf is a leaf, hinged to the table top; this leaf, in its folded position, being shown in Fig. 2, and its distended position being shown in dotted lines Fig. l.

H H are links constructed usually of fiat bars of steel, set edgewise and pivotal] y connected with platform E at h and with leaf G at h. The platform `and attached head are raised or lowered by manipulating leaf G. Then the links and platform are in such inclined position, for instance, as shown in solid lines Fig. l, these parts gravitate toward the leftA hand, such movement being accommodated by trnnnions e sliding along grooves a whereby when the platform is turned down, as shown in Fig. 2, the platform swings clear of the fly-Wheel. In this latter position of parts, it Will be observed that the leaf covers the table and its aperture, thus furnishing a flat top, like an ordinary table. When the leaf is unfolded to its horizontal, distended position, shown in dotted lines Fig. l, the links fit into the respective grooves g of theleaf and into grooves a of the table, in which position of parts, the links bear upon the bottom Walls of grooves a', the latter serving as fulcrums for these links and the links then serving as levers to hold their end of the platform in its position flush with the table.

lVhile the platform is being raised, the trnnnions thereof are of course free to move toward the right hand, to accommodate any impulse given the platform in that direction, and if the free end of the platform should engage the casing it would do no harm, but the arrangement. is usually such, that before the engagement would occur, thelinks engage the opposing end Wall of the table, by which engagement the platform is moved more or less toward the right hand, and as the links and platform approximate a straight line the platforni is thereby moved still farther toward the right hand. It is essential that the platform when in its working position should be rigidly held in place to prevent the head from vibrating, and if it were thus held, bythe end thrust of the links, in such case, the hinges of the foldingleafwould be subjected to great strain. To avoid this, the holes in the links are preferably elongated a triiie, so as to give a little lost motion endwise the platform, and

on the near approach of the platform to a horizontal postion, the beveled end e thereof engages the internal correspondingly undercut end Wall u? of the table, by which engagement the platform is forced to its extreme right hand position, in which position the platform not only engages and rests on the rabbeted sec- ICO tion or ledge 0,3 of the table, but the platform is firmly wedged in between 'the 4internal end Walls of the table, and this is accomplished Without causing undue strain on the hinges of the folding leaf. Meantime the links that by their engagements with their fulcrums have performed the functions of levers in, so to speak, prying up the free end of the platform, continue to sustain this end of the platform in position, flush with the table top, and, at the same time lip c2 of the platform, by engaging the under side of the table causessuch vertical strain on the links that together with the Wedgng in of the platform as aforesaid the head is practically held as firmly as if it rested directly on the table top.

What I claim is:

l. The combination with a table having a central opening'formed with grooves in its side at one end, of a platform` hinged in the opening, the trunnions at the end of the table Working in the grooves, the hinged leaf and links connecting the leaf and platform, said links having longitudinal movement on both the leaf and platform, substantially as set forth and described.

2. The combination With a table having a central opening formed .with a ledge at one end, and an undercut edge at the other, and horizontal grooves in the sides adjacent to the ledge, of a platforimthe lateral trunnions arranged at the end of the same and sliding in the grooves, the hinged leaf, andlinks connecting the leaf and platform, said platform having a beveled free-end, substantially as set forth and described.

3. The combination with a table, having a central opening, provided with horizontal grooves in its sides, of a platform having trunnions at one end which slide in the grooves, the hinged leaf, and the links connecting the leaf and platform, the links being slotted at their lower ends, :and Workin-g in grooves in the sides Vof the leaf, substantially -as described.

In testimony whereof I sign this specification, in the presence of two Witnesses, this 3d day of May, 1892..

THEODOR KUNDTZ.

Witnesses:

CEAS. G. CANFIELD, H. KAnsTLE.

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