US 79571 A
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j @uitrit gisten getest @met JOHN W. HEWITT AND GEORGE E. LYNCH, OE -ALLEGHENY CITY, PENN.- SYLVANIA,
Letters Patent No. 79,571; dated T1/.ly 7, 1868.
TO ALL WHOM IT 'MAY CONCERN:
Be it-known that we, JOHN W. Hnwrrr and GEORGE R. LYNeH, of the city and county of Allegheny, and State ef Pennsylvania, have invented certain new and useful Improvements in Adjustable Casters forFurniture, Sewing-Machines, &c., of `which the following is a full, clear, and exact description, reference being had to the accompanying drawings which make part of this specification, and in which- Figure 1 represents a side view of the table of a sewing-machine with our improvement attached.
Figure 2 an end viev of the same, showing'the feet of the frame resting on the 'loor, and
Figure 3 a similar view, in which the feet of thefrarne are shown as elevated from the ocr, and the casterwheels resting thereon.
The object of our invention is to provide a device by which `furniture, sewing-machines, &c., canA be set solid on the floor, or placed at pleasure upon casters, so as to be easily moved about, to which end our improvements consist in mounting the easter-wheels in the lower ends of elongated vertical supports, passing through fixed guides attached to the legs of the frame, which are raised from the iloor when desired, by cams pivotcd upon them, and Operated by levers and connecting-links, so as to press upon the tops ofthe 'caster-wheel supports, and thereby raise the frame from the loor, as hereinafter more fully described.Y
In the accompanying drawings, which show a convenient arrangementof parts for carrying out the objects of our. invention, B represents the table of a sewing-machine, which is supported by a frame or frames, A, provided with legs S, to each of which a caster-wheel is connected. C C represent thc caster-wheels, which are mounted in suitable bearings in the lower ends of the elongated vertical supports-D. These supports pass through fixed guides Eyupon the legs of the frame, the guides being either cast thereon or attached by bolts or screws, as may be preferred. An cccentric-eam,iG, is pivoted-u-poneach leg of the frame above the casterwheel support D. At each end of the table, the two cams which are pivotcd to its legs are connected by a link or rod, I, and one cam of each pair is provided wth a lever, by means of which the two cams are rotated. The cams G are made with suiiicient throw to elevate the frame as far as may be necessary from the door, and rotate upon bearings J upon the legs S, having their peripherics resting upon the tops of thesupports D,`and being set in such rclativeposition thereto, that when rotated by moving the levers R downward, their full part' or swell presses upon the tops of the support, and thereby raises the frame from the door, causing it to rest upon the caster-wheels C, through the intermediation of thespports D and cams G. By raising the levers R the full part'of the cams is withdrawn from the supports D, and the legs S lowered so as to restsolid upon the loor. The stop-pins K prevent the further motions of the' cams, when the legs have been lowered so as to vrest firmly upon'the door. I
It willybe seen that our improvement is readily applicable to articles of furniture, billiard-tables, sewingmachines, ttc., enabling the same to be easily moved or set firmly in position, as desired. I
Having thus fully described our invention, what we claim therein. as new, and desire to secure by Letters Patent, is. e
The combination of the eccentric-cams`G and connecting-links I with the supports D, guides E, wheels G, and frame-legs S, when arranged and operating as and for the purpose set forth.
JOHN w. HEWITT, i GEORGE E. LYNCH.
PERGEVAL BECKETT, ROBERT HEWITT