US534721A - Top-flat-card grinding - Google Patents

Description

(No Model.)

H. MODERMOTT. TOP FLAT CARD GRINDING.

N0. 534,721. Patentedf'eb. 26, 1895.

3 w elvwg WDQN may UNITED STATES PATENT Fries.

HENRY MCDERMOTT, OF NASHUA, NEW HAMPSHIRE.

TdP-FLAT-CARD GRINDING.

EEGIFICATION forming part of Letters Patent No. 534,721, dated February 26, 1 895.

Application filed February 20,1894. Serial No. 500,849- (No model.)

To all whom it may concern.-

Be it known that I, HENRY MCDERMOTT, a citizen of the United States, residing at Nashua, in the county of Hillsborough and State of New Hampshire, have made certain new and useful Improvements in Top-Flat- Card Grinders, which improvements are fully set forth and described in the following specification, reference being had to the accompanying sheet of drawings, in which Figure 1 is an end elevation of a grinder embodying my invention, the stand which supports the journal bearing of the grinderroll being removed. Fig. 2 is a side elevation of the same parts, with the grinder-roll stand in position. Inasmuch as the operative parts of my machine are the same at each end of the grinder I have thought it necessary to illustrate only one end of the same. Fig. 3 is a cross-sectional view on line 0cw of Fig. 2. Fig. 4 is a sectional view through the upper end of the standard and the plate, e, said section being taken upon a line, such as is indicated at 00:1; Fig. 1, which extends through the wider part of said plate.

This invention is in the class of grinders, (used for dressing or leveling up the top-flats of carding machines) which, being attached permanently to'the carding machine frame, may be brought into grinding relation with the top-fiats,or thrown out of operation, at will and my purpose is to provide simple and cheap mechanism which may be readily controlled and quickly adjusted.

In carrying into effect my invention I have dispensed with certain cumbersome levers and weights which have been used, in some instances, heretofore.

Referring now to the drawings, (1 indicates a standard secured to the carding-machine frame and having bolted to its outer face a bracket-stand 17 whose upper end is formed as a journal bearing 1) in which the shaft cof the grinding roll 0 revolves. The upper portion of standard a is reduced in thickness -(as seen at a in Fig. 2) and is formed with laterally extending arms, or ends, (l -0L whose upper face, or edge, is straight throughout the greater part of its length but whose ends are gradually reduced in height, as shown in Fig. 1, to provide ways on which the ends of the top-flats may be successively guided as they approach the grinding roll 0. Secured to the outer face of this reduced portion a, by bolts d-d, is abar or plate e whose upper portion e projects laterally and overhangs the part a. One half, or thereabout, of this overhanging portion is reduced in thickness (as shown at e Fig. 1) to receive a shoe f which is secured in place by screws f, the screw holes in the shoe being elongated, as in Fig. 1, to permit limited vertical adjustment of the shoe, said shoe and the overhanging part of the bar or plate thus forming a way, composed of two parts which are adjustable together and one of which parts is also adjustable independently of the other. I do not wish, however, to be understood as limiting myself to this particular construction of way for limiting the extent of the upward movement of the flats, as any construction of way having the adjustment mentioned may be employed without departing from the spirit of the invention, whether the same consists of a shoe and a bar or plate, or of other de vices.

WVhen shoefis properly adjusted its lower edge is somewhat below the lower face 6 of the overhanging portion 6' of the plate 6 and, preferably, parallel therewith but not necessarily so, as clearly indicated in Fig. 1. The end of shoefimmediately beneath the axial center of the grinding roll 0 is beveled, as at f so that as the top-flats travel in the direction indicated by arrow No. 1, said flats are deflected downward andguided in a direction to grind the proper bevel or angle on the ends of the card-teeth and, to vary said angle,

it is only necessary to loosen the screws f and raise or lower the shoe f, thus varying its lower level relatively to that of the fixed, overhanging, portion a to which the shoe is clamped.

Whenever the grinding roll 0 becomes worn and reduced in diameter, and it is desired to adjust the plate eand its attached parts, this may be readily done byloosening the nuts of bolts dd, the openings through which said bolts pass being enlarged to permit lateral adjustment and the opening of boltsd being also enlarged to permit vertical adjustment. This provision for double adjustment enables the attendant to raise the plate 6 without materially disturbing the end nearest the inclined way a on which the flats first ride as they approach the grinding roll; the bolt d meanwhile serving as a fulcrum upon which the plate 6- may be rocked, as well as moved longitudinally.

I preferably drill and tap the plate 6, near the bolt d, and insert therein a screw 9 whose lower end abuts the top of standard a. When it is desired to adjust plate e vertically it is only necessary to ease the nut of bolt (1' and set up the screw g, when the end of the plate that bears shoe f will be forced upward or, by unscrewing screw g said shoe and its support may be lowered. It will thus be seen that the plate 6 and its attached parts may be adjusted as a whole, either vertically or longitudinally and that shoe f may be adjusted independently of the plate which supports it.

To force the card-teeth of the top-flats upward, into grinding relation with roll 0, I have provided a spring -pressed rod h arranged to slide vertically in bearingsiformed as parts of a bracket-frame which is bolted to the standard ct. The upper portion, or head, of the rod h is made with a laterally extending arm it that is bent downward upon the side from which the top-flats approach the grinder.

It will be seen by reference to Fig. 2 of the drawings that each top-flat is formed with an extension m that may engage and ride upon the ways a a and also with a heel portion 1% that engages and rides upon the arm 77. of rod h. WVhen the grinder is in operation the rod h is then in its highest position and the top-flat ends m are raised from the ways a a until they engage and ride upon the lower faces of the overhanging portion of plate a and of the shoef. \Vhen, on the other hand, the grinder is thrown out of operation, the rod h is lowered, permitting the ends m of the flats to travel on said ways a a thus allowing the card-teeth of the flats to pass under the grinder roll without engaging it.

To force the rod h upward I have coiled thereon a spiral spring 12. one of whose ends abuts the lower bearing 7 The opposite (upper) end of said spring abuts a nut n screwed upon rod h and said spring seeks constantly, by reason of its expansive force, to carry the rod upward. A check nut "n is also preferably provided to retain nut n in position after adjustment. Loosely mounted upon the lower end of rod his a collar 0 having an operating handle 0', the lower face of said 001- lar being formed as a cam 0 that engages a radial pin 71. in the rod h in such manner that when the cam-collar is partially rotated the rod is drawn downward, against the force of the spring.

When it is desired to bring the grinder into use itis only necessary to rock the cam 0 into the position shown in Fig. 2 when spring n by its effort to expand, immediately forces the rod h, and top flats supported thereon, upward.

My described grinding device, as a whole,is

believed to be quite as simple as any in use and maybe quite as readily adjusted or started into action.

Having described my invention, I claim- 1. In a top flat card grinder, the combination with the grinding roll and its supports, and mechanism for forcing the flats upward into grinding relation with the roll, of a way for limiting theextent of the upward movement of said flats, said way consisting of two parts which are adjustable together and one of said parts being also adjustable independently of the other, substantially as described.

2. In combination with a grinding roll and supports for the same, spring-pressed rods said shoe and plate being adjustable together 5 and said shoe being also independently adjustable on said plate and both forming a way for-limiting the upward movement of said top flats, substantially as described.

4. In a top flat card grinder, the combination with the grinding roll, and ways for the top flats, of a vertically movable springpressed rod having a pin, and a rotatable collar, loosely encircling said rod and having a cam engaging said pin, substantially as de- :05-

scribed and for the purposes specified.

HENRY MODERMOTT. \Vitnesses:

O. A. McDERMo'rr, GEORGE H. BARRETT.

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