US590831A - Welt-seam-trim ming machine - Google Patents

Description

I (No Model.) 2 sheetS sn-eet 1.

Z. T. FRENCH & W. O. MEYER. WELT SEAM TRIMMING MACHINE No. 590,831. Patented Sept. 28,1897.

rotors Witnesses ln/ve m (No Model.) 2 Sheets8heet 2.

z. T. FRENCH 81W. 0. MEYER.

WELT SEAM TRIMMING MACHINE.

No. 590,831. Patented Sept. 28,1897.

n PEIERS o0, PHOTO-LING. WASHINGTON, n c.

UNITED STATES PATENT OFFICE.

ZAOI-IARY -T. FRENCH AND YVILLIAM O. MEYER, OF BOSTON, MASSACHUSETTS.

WELT-SEAM-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 590,831, dated September 28, 1897.

Application filed May 27, 1896. Serial No. 593,244. (No model.)

T0 aZZ whom it may concern.-

Machines, of which the following description,

in connection with the accompanying drawin gs, is a specification, like letters and figures on the drawings representing like parts.

In United States Letters Patent No. 558,379, dated April 14., 1896, a welt-seam-trimming machine is shown wherein'a crown-knife is employed as the welt-seam-trimming knife, it having a flaring flange sharpened at the edge. For the production of good work this knife should at all times be very sharp, and hence a grinding-wheel was provided adapted to be moved into and out of engagement or contact with saidknife whenever desired. In practice, however, we find that to operate such a grinding-wheel requires considerable attention and consumes considerable time, and, furthermore, cannot be operated while the welt-s'eamis being trimmed for the reason that the operator is holding the work with both hands. Therefore it is necessary to provide means whereby the grinding-wheel and trimming-knife may be repeatedly brought into engagement while the' machine is in operation, and, if desired, while the knife is operating to trim the welt-seam, the intervals of time during which said parts are in engagement being quite short-'as, for instance, we may repeatedly move the grinding 'wheel into engagement with the knife.

Our invention therefore has for one of its objects to improve the construction of the means employed for thus repeatedly moving the grinding-wheel into engagement with the knife.

A crown-knife is arranged to work across the space formed between two rests, and the work is held pressed against said rests with the welt-seam between them; and another object of this invention is to make the lowerknife embodying our invention; and Fig. 2, a right-hand side view of the lower part of the machine shown in Fig. 1, showing in end elevation said grinding mechanism and worksupport or rest.

The main framework comprises, essentially, a base A, mounted upon a column A, and side pieces B, erected upon said base.

A crown-knife a having a tapering flange sharpened at the edge and secured toa sleeve 66 or otherwise supported and driven by any suitable means, are all as in the Letters Patent aforesaid, to which reference may be had, and so also in said patent will be found the upper work-support c, which is adapted to enter the crease, and the feeding mechanism for i the work.

The work-support or rest ris located a short distance below the work-support c, and when the work is in position it will be seen that the welt-seam enters the space between said worksupports or rests o and r,- and the knife enters and works across the space between said work-supports in trimming thewelt-seam.

The Work-support or restr is formed with a dovetailed projection 0", which enters a correspondingly-shaped groove formed in the under side of a block W, said block having upon its rear side a dovetailed projection r which enters a correspondingly-shaped groove in the block a on the shaft a A set-screw r passes up through the part 9", and another set-screw r passes in through the part T and when said set-screws are loosened the part 7" may be moved in and out with relation to the knife and thepart "r may be moved up and down.

In either case the work-support or rest 1 is adjusted with relation to the rest a, so that the angle of the work is changed.

The grinding mechanism or attachment consists of a grinding-wheel it, held securely by- A frame 20 has two ears a a each formed with a horizontal hole through it, and a rod or bar, as n passes through the hole in each ear a and by means of a set-screw is fixedly held in place, said rods or bars 11 projecting in opposite ways from said ears n at or about equal distances and adapted to enter the holes in the end blocks n a serving as bearings on which said end blocks and parts connected thereto are free to slide back and forth.

The grinding-wheel n is located beneath the crown-knife a and is moved back and forth with the shaft n from one to the other side of said knife, engaging the beveled edge thereof as it passes in each direction, thereby repeatedly contacting with or engaging it.

The frame 20 is provided with ears a n there being two pairs of cars, one pair at each side of the frame, and said ears are bored furnishes a bearing for a hand-screw n which passes up through it and thence up through an ear n also pro ecting from the clamp-like ring if, so that by turning said v hand-screw a said frame 20 and parts carried by it may be vertically adjusted.

The shaft or, carrying the grinding-wheel a, has secured to it a belt-pulley 11 by means of which it is continuously rotated as it travels back and forth across the bevel-ed As a face or edge of the rotating knife a means for thus moving the shaft 72' back and forth we have herein formed on or secured to said shaft n a worm a, (see dotted lines, Fig. 1,) which engages a worm-wheel a, secured to a shaft 91 mounted in suitable bearings in a part of the frame connected with one of the end blocks, and to one side or face of said worm-wheel n a crank-pin 91- (see dotted lines) is secured, upon or to which a link a" is loosely connected, the oppositeend of said link being loosely or pivotally con- 1 nected with the frame 20 or other-fixed point,

and as the shaft n is revolved by the belt- 1 pulley n the worm n will be correspondingly rotated, driving the worm-wheel a,

and by means of its crankeonnection with the frame the shaft n and parts connected therewith will be moved back and forth or reciprocated longitudinally. Thus it will be seen that both the trimming-knife and grindingwheel are continuously rotated and that one o of said parts is repeatedly moved into and out of engagement with the other-ms, for instance, the gri'nding-wheelis moved back and forth across the edge of or into and out of engagement with the knife. Furthermore,

it will be seen that as means are provided for moving the grinding-wheel, as shown, little or no attention on the part of the operator is required and that the grinding-wheel will be kept in engagement with the knife but for short intervals of time.

lVe claim- 1. In a welt-seam-trimming machine, a grinding-wheel, its shaft, asupporting-frame for said shaft having a bearing in which it is free to rotate, a frame constructed and arranged to receive and support said shaft-supporting frame having rods upon which said shaft-supporting frame is free to slide in the direction of the length of the shaft, means for rotating said shaft, and means for moving its supp0rting-frame back and forth, to thereby rotate the grinding-wheel and cause it to automatically travel back and forth across the beveled cutting edge of the trimmingknife, substantially as described.

2. I11 a welt-seam-t-rimming machine, a grinding-wheel, itslshaft, a supporting-frame for said shaft having a bearing in which it is free to rotate, a frame constructed and arranged to receive and support said shaft-supporting frame having rods upon which said shaftsupportin g frame is free to slide in the direction of the length of the shaft, means for verticallyadj usting said frame, means for rotating said shaft, and means for moving its supporting-frame back and forth, to thereby rotate the grinding-wheel and cause it to automatically travel back and forth across the beveled cutting edge of the trimmingknife,

, substantially as described.

In a welt-seam-trimming machine, a grinding-wheel, its shaft, asupporting-frame for-said shaft having horizontal holes through it, .a frame having horizontal rods upon which said shaft-supportin g frame slides, a belt-pulley n fixed to saidshaft, a worm a, formed on or secured to said shaft, worm-wheel n bearings therefor attached to the shaft-sup porting frame, a crank-pin on said wormwheel,a link a", connected at one end with said crank-pin and at the other end with a fixed point, whereby said grinding-wheel is rotated and moved back and forth beneath and across the beveled cutting edge of the trimming-knife, substantially as described.

4:. In a welt-seam trimming machine, a grinding-wheel, its shaft, asupportingframe for said shaft having a bearing in which it is free to rotate, a frame constructed and arranged to receive 'andsupport said shaft-supporting frame having rods upon which said shaft-supporting frame is free to slide in the direction of the length of the shaft, a clamplike ring embracing the column of the machine, having vertical rods upon which said frame is verticallyadjustable, means for rotating saidsha'ft, and means for moving'its supporting-frame back and forth, .to thereby rotate the grindingwheel and cause it to antomatically travel back and forth across the beveled cutting edge of the trimming-knife, substantially as described.

5. In a welt-seam -trimming machine, a crown-knife having a flaring flange and two work-supports as c and 9, located a short distance apart to receive the Welt-seam between 5 them, said knife working in and across said space, the work-support 1" being located in front of said knife and made adjustable in and out, substantially'as described.

6. In a welt-seam-trirnining machine, a

IO crown-knife, having a flaring flange and two work-supports as c andr, located a short distance apart to receive a welt-seam between the Work-support rbeing adjustable in a vertical line toward and from the work-support c, substantially as described. In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

ZACI-IARY T. FRENCH. WILLIAM C. MEYER.

Witnesses: 1

F. H. DAVIS, 13. J. NoYEs.

them, said knife working across said space, I

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