US17300A - Machine fob elauiitg chair-seats - Google Patents

Description

' i' UNITED STA-'rus PATENT OFFICE.

`EDWARD Q. SMITH, OF. CINCINNATI, OI-IIO.

Specification of` Letters Patent No. 17,300, dated May 12, 1857.

To all 'whom t may concern: v

Be it known that I, EDWARD Q. SMITH, of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Machines for Cutting or Forming the Upper Surfaces or Face-Sides of OhairfSeats and Similar Articles; and I do hereby declare that the following is a full, clear, and exact description ofthe same, vreference being had to the accompanying drawings, making a part of this specification, in which- Y Figure l is a longitudinal Vertical section of my improvement; the plane `of section being indicated by the line (w) in Fig.

3. Fig. 2 is a transverse vertical section of the same; the plane of section being indicated by the line in Fig. 3. Fig. 3

is a plan or top view of the same. Fig. 4 is a'detached side view of the roller which raises and lowers the cutter-shaft.

Similar letters of reference indicate corresponding part-s in each of the several figures.

This invention relates to certain improvements in machines for cutting or forming the upper surfaces or face-sides of chair Seats, and other articles having curved or irregular surfaces. p

This invention consists in the combination, by1 means of a universally-jointed shaft, of a feed wheel, which derives its motion from the chair seat, with a cam which shifts the bearing `of the cutter shaft.

understand and construct my invention, I will proceedto describe it.-

A represents a rectangular framing, which may be constructed of either wood or metal;

and B represents a driving shaft, which is placed transversely on the lower part of the framing.

At each side of the framing, A, on its upper part, two curved or segment guides,

'C O, are attached. These guides may be constructed of cast iron, and the two at each side of the framing may be cast in one piece. The guides receive the bearings of two feed rollers, D D; the said bearings being fitted Iloosely in the guides, and each having a pendent rod (b) attached; the said rods passing down through the top pieces of the framing, as clearly shown in Fig. l.

Between the guides, C, C, at one side of the framing A, bearings, E, are secured;

the said bearings having a small shaft, F,

To enable those skilled in the art to fully l `ters (j) secured to it, the cutting edges of lwhich lare curved according to the character `or form ofthe work to be produced; see

seats.

J, represents a'cuttenshaft, the bearings i (c) (el) of which are fitted between the lower ends rof the guides, C. Thebearing (c) is a permanent one, but the bearing (cl) is allowed to slide up and down; its sides being fitted in grooves (e) inthe sides or edges of the two guides between which it is placed. The upper end of the bearing (cl) has a yoke K attached to it; said yoke being also fitted in the grooves (e), see Fig. 3. A shaft is fitted in bearings (g) (g) secured between the two guides above-mem tioned. This shaft passes through the yoke, K; and the shaft has an eccentric, (.71), upon it; the eccentric being fitted and working within the yoke, as shown clearly in Fig. 2. The inner end of the shaft (f) is connected by a universal joint with one end of a shaft, L, and the opposite end of this shaft has its bearing in a weighted lever, M, which is pivoted to one of the guides, O, as shown in Fig. 3. On the shaft L, a feed wheel N is placed, the circumference of which is just equal, as regardsmeas- 'urement, to the width of the chair-seat or other article to be cut; the object of this will be explained hereafter.

The cutter-shaft, J, has one or more cut- Fig. 3, in which the cutter is made of the necessary or proper form to cut chair- On one end of the cutter-shaft, J, a pulley, O, is placed.

P represents a table or bed, which rests upon bars, Q, Q, placed at the upper part of the framing, A, one at each side. Both ends of these bars, at their under sides, are inclined, as shown at (k) (la) in Fig. lf; and these inclined surfaces or planes rest or are fitted in bearings (Z) (Z) the outer bearings (Z) being attached to the inner sides of vertical plates, (m), at the front end of the framing; and the bearings (Z) being attached to the lower parts of the inner sides of the bases of the guides, C. The outer ends of the bars, Q, Q, have each :a nut (n) attached to them, through which screws (o) edges ofthe table or bed P; seevFig. 3.

S'represents a shaft, placed transversely on the framing,fA, below the bed P. This shaft has a pulley (t) on its outer end, and a belt (u) passes around this pulley and the pulley G on the shaft, F. A belt (o) passes around a pulley (w) on the driving shaft B, and around thepulley, O, on the cuttershaft, J. The shaft, S, is driven by a belt from the shaft, B.

The stuff to be operated upon (shown in red) is previously cut of the proper size, and is placed upon the bed P, face-side downward. The bed P is then adjusted to the proper height to suit the thickness of the stuff, by turning the screws (o) (o), which move the bars, Q Q; the said bars being either elevated or depressed, according to the direction in which they are moved, in consequence of the inclined planes, (lo) (le). The bed P willv also be raised or lowered with the bars, asyit rests upon them. The plate R is adjusted so asto be in the same plane as the bed P; sufficient space being allowed between the ends of the plate and bed, to permit the cutter to work between them. The feed-rollers, D, D, bear upon the stuif, and feed it over the cutter-shaft; said rollers being rotated in consequence of the wheel H gearing into the wheels, I, I, on the rollers. the stu, which, as it is fed over the cutter, rotates said wheel and its shaft, L; the eccentric (lz) is also rotated, and, by means of the yoke K, raises and lowers the bearing (d) of the cutter-shaft, so that, the face-side of the stuff will be cut in somewhat dishform; for the eccentric is so formed as to graduallyraise the end of the cutter-shaft, as the cutter commences to act upon the stuff the cutter-shaft being gradually elevated until the center of the stuff reaches the cutter; the end of the shaft then gradually descending. The wheel N and eccentric (la) make one revolution only, as

each piece of stuff passes underneath the wheel N; the eccentric being so placed at the commencement of the work that the shaft J may be at its lowest point. The bearing (d) of the cutter is thus shifted by means of the feed Wheel N, which is not connected with the driving power, but derives its motion from the chair seat itself, while the latter is passing through the machine.

If, from any cause, the seat sticks fast in The wheel N also bears upon` the machine, and refuses to move, the position of the cutter remains unaltered until the seat begins again to progress. This is a feature of great importance, because it prevents all damage tothe seat in case of accident or of stoppage of the feed of the stuff. In other machines where the bearings of cutters are shifted, the shifting motion is generally imparted by means independent of the motion of the stuff, so that if the stuftl ceases fto move while the other parts are leftin Imotion, the cutter bearings continue to be shifted, and the stuvis spoiled.

In the use of other machines, much labor is required to sort out the various thicknesses of seats before y'passing them through the machine; anda different adjustment is required for each change of thickness; for if the apparatus is set to cut thin seats, and thick stuff vis then introduced, the cutters must sink deeper into the thick seats than into the/thin stuff, and thus a wrong formation of the concave is made, the work spoiled, etc., or the cutter bearing will not be shifted at the proper moment. No such difficulty occurs in the use of my machine; if different thicknesses of stuff should be fed indiscriminately through the machine, the feed wheel N would accommodate itself to them, and would rise or fall according to the shaft L allows the wheel N thus to ad- `just itself. Much time and labor at present lost in assorting the stu, and adjusting, is

`thus saved by my improvement.

It will be seen that the guides C are socurved as to form apart of a circle, concentric with the wheel H, so that the wheels, I, I, of the feed-rollers, will not be thrown out of gear with the wheel I-I, in adjusting i the bed, S.

The above machine has been practically tested, and operates rapidly and well. The pieces of stuff?" pass underneath the feedrollers in contact with each other; and the work is produced in a uniform manner.

I do not claim, broadly, the shifting or vlifting of cutter shafts or bearings thereof by means of cams, for this is an old and well known method. Nor do I claim adjusting the t-able or carriage by means of wedges. 'But What I claim as new, in chairseat machines, is:

The combination, by means of the universally-jointed shaft L, of the feed wheel N with the eccentric (h), when 'the said wheel N derives its motion vfrom the chair seat, substantially as and for the purposes described.

EDWARD Q. SMITHI Witnesses:

C. M. REEVES, JOHN W. RUBY.

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