US137256A - Improvement in machines for cutting nicks in umbrella-runners - Google Patents

Description

3 'Sheets-Sheet 1. G. M SMITH.

Machines'for Cutting Nicks in Umbrella Runners.- N0. 137,256, '7 PatentedMarch 25,1873

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Machines for Cutting Nicks in Umbrella Runners. No. 137,256, PatentedMarch25,1873.

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UNITED STA ES oaamv M. SMITH, or PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR CUTTING NICKS IN UMBRl-iLLA-RUNNERS.

Specification forming part of Letters Patent Ito-137,256, dated March 25, 1873.

To all whom it may concern:

Be it known that I, ORREN M. SMITH, of

the city and county of Philadelphia, State of Pennsylvania, have invented a Machine for Cutting Nicks. in Umbrella Runners and Notches, of which the following is a specification:

My invention consists of improvements in a machine for cutting radial recesses or nicks in umbrella runners and notches, the said machine being too fully described hereafter to need preliminary explanation.

In the accompanying drawing, Figure 1, Drawing N o. 1, is a front view of the machine; Fig. 2, Drawing No. 2, a transverse section of the same on the line 1 2, Fig. 1; Fig. 3, Drawing No. 3, a transverse section on the line 3 4, Fig. 1; Fig. 4, a plan view; and Figs. 5 and 6, enlarged detached views of parts of the ma chine.

The table A of the machine is supported by opposite frames B an d B ,connected together by longitudinal braces a a. 1n hearings in the I lower portions of the frames turns a longitudinal driving-shaft, 0, one end of which is furnished with fast and loose pulleys b b, and to the opposite end is secured a smaller pulley, b. A shaft, D, turning in suitable bearings on the table A, has at one end a pulley, 0, receiving motion by a belt from the pulley b on the driving-shaft, and at its opposite end a pinion, c gearing into a cog-wheel,.c on a shaft, D,turning in bearings in the frames B B. Vibrating arms E, hung at their lower ends to a horizontal spindle on the inner side of the frame B,Fig. 1, carry at their upper ends a spindle, e, to which is secured a saw or cutter, F, and also a pulley, d, the latter receiving motion from a pulley, d, on the driving-shaft through the medium of a belt, 0. The arms E are connected by means of a rod, r, to the upper end of an arm, h, hung at its lower end to the frame, and having near its upperend a projection, h, caused by a spring, y, to enter, successively, a series of depressions, 2', formed in a portion of the periphery of a cam-disk, G, on the shaft D. Upon the table A, in front of the saw F, is a horizontal disk, H, turning upon a vertical axis, t, and resting upon a similar permanent disk, 11, the said movable. disk having in its periphery a series of circular recesses, j, arranged at reg ular distances apart, for receiving and retaining the runners and notches. to be operated upon. A ratchet=whee1, t having as many teeth as there are recesses in the disk H, is secured to a boss on the said disk, and to a plate, t turning on the said boss, is hung a pawl, t adapted to the teeth of the ratchetwheel. Two vertical standards, K K, Fig. 1, are secured to the top of the table A, and are connected together by upper and lower crossbars k k, and in openings in these bars slides a vertical mandrel, L. The ratchet-wheel t for rotating the disk H is provided with a retaining and releasing device, J, consisting of a vertical rod, q, sliding in bearings on the cross-bars k k, and having a projecting arm, g to which is secured a pin, g adapted to one of a series of openings, 0, in the face of the ratchet-wheel. The rod q is squared in its lower bearing to prevent it from turning. The retaining device J is maintained in a de pressed position by a spring wound spirally around the rod q between its upper bearing and the arm (1 and is raised by means of a sliding inclined block, 2, connected at one end to the pawl-plate t and at its opposite end, by a rod, m, to a bar, m acted upon by a cam, W, on the shaft D. On the lower end of the mandrel L is a cylindrical projection, a, ar ranged to enter the opening in the runners or notches contained in the recesses of the disk H, and the upper end of the said mandrel is connected to, but arranged to turn freely in, an opening in ahorizontal bar, I. The latter is jointed at one end to a post, 1, and is connected at its opposite end, by means of a ver tical rod, 1 to a bell-crank lever, Z hung to the table A, and operated upon by acam, m, on the shaft D. Secured to the lower crossbar 7c,'a-nd embracing the projection n of the mandrel L, are two fingers, w w, for a purpose explained hereafter. (See Fig. 6.) A sleeve, 8, to which is secured a ratchet-wheel, s is passed over the mandrel L, and confined upon the latter between the cross-bars k and It, the said mandrel having a feather, u, adapted to a feather-way in the sleeve 8, so that it may slide within, but not turn independently of,

the latter. Turning on the sleeve above the ratchet'wheel s is a collar, 8 to which a springpawl, 8 is hung, the latter being connected,- by means ofa rod, 19, with the upper end of a bar,'p, similar to the bar h, before referred to, and correspondingly acted upon by a notched cam, G, similar to the disk Gr on the shaft 1); The bars h h and m and lever Z are held againsttheir respective cams, and receive their forward movement from strong spiral springs 3 attached to, the brace a, the cams effecting only the return movement of the said bars and levers.

All of the above-described devices are duplicated in the machine shown in the drawing, the description relating to those parts only which are situated at the left-hand side of the center line 00 w in Figs. 1 and 4, while at the right-hand of that line is a recessed blankholding disk, 11", similar to the disk H, and

provided with a vertical mandrel, L, and independent saw F, all of which parts are operated independent-1y of the disk H and its mandrel and saw, but in a similar manner, by springs and by special cams arranged for the purpose upon the camshaft D.

As the operation of the several parts upon both sides, of the machine is precisely alike, it will suffice to describe the manner of operating upon the blanks on one side of the machine only-011 the disk H, for instance, best observed in the enlarged views, Figs. 5 and 6.

After filling the several recesses j of the disk with the blanks, in which radial recesses are to be cut by the saw, the machine is set in motion, it being supposed that the mandrel L and retaining device J are raised clear of the disk, so that, in the first place, the latter may be turned, bymeans of the pawl t and ratchet t, to such a position as to bring one of its recesses, j, and the blank contained therein directly beneath the raised mandrel L. As soon as this has been accomplished the pawl 15 its rod m, and the inclined plate 2 are moved forward, when the retaining device J will be depressed by the action of its spring, thus causing the rod g of the same to enter one of the holes 0 of the disk in order to lock and pre-- vent any further rotary movement of the latter. At the same time, or immediately afterward, the mandrel L will be caused to descend until its end a enters the central opening of the blank, as shown in Fig. 6, and becomes wedged therein, so that the said .blank may be turned by means of the mandrel, after which another portion of its edge to the action of the saw. The latter again moves forward, cuts a second nick, and is retracted, when the blank is againturned, and a third time nicked by the saw, these alternate movements of the mandrel andsaw being continued until the desired n umberof radial nicks, at equal distances apart,

eight projections or teeth, or ten,.or twelve, as

the case may be. 1

As soon as the notch is finished the arms h and h, Fig. 2, will be forced back by the plain portions of the cams G and G, which will have the effect of drawing back the saw and stopping the rotary movement of the mandrel L,

and, at the same time, the latter will-be lifted by the action of the cam m Fig. 3, the notch being detached from the said man drel by means of the fingers w a, Fig. 6, and falling back into its recess j of the disk. The arm m, plate 2, with its inclined plane and pawl 25 will next be moved forward in the direction of their arrow, Fig, 5, which will have the effect,'first, of turn ing the said disk, by means of the pawl and ratchet 19, so as to bring another blank beneath the mandrel and in front of the saw; and, second,of permitting the retaining device to enter the hole 0 of the disk, and thus lock the latter, after which the finished blanks are carried around with the disk until they arrive at a point directly over ahole,j, in the table, through which they drop into a suitable receptacle.

The disk H and parts connected therewith at the right-hand side of the machine operate in precisely the same manner as the disk H, and both disks maybe fed with blanks by a single attendant.

In duplex machines of this class, as heretofore constructed, both saws are secured to the same spindle, the objections to which plan are, first, that notches having the same number of nicks must be out upon both sides of the ma g chine, as both saws operate simultaneously and, secondly, that, as the saws are apt to wear unequally, notches of unequal depth will be cut by the same unless the spindle be canted or inclined in order to enable one saw to cut as deeply as the other; and when this is done the notches, necessarily, are somewhat untrue. Both of these objections are overcome by making one side of the machine entirely separate and independent of the other, as in my invention, as the saws can then be moved straight forward so as to cut to any desired depth; and, by changing the cams and ratchet-wheels, one side of the machine can be used for cutting notches or runners of seven or eight nicks, while on the other side notches having ten or twelve nicks can be cut.

Instead of two disks, H and H with their saws, &c., three, or even four, or a greater number of disks, might be arranged upon a single frame; but two will, in most cases, be found sufficient. ;Another advantage pos sessed by my machine over those heretofore used is, that most of the operating parts are the retainer is alternately raised and depressed, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ORREN M. SMITH.

Witnesses: v

SAMUEL W. EVANS, GEO. E. HARVEY.

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