US778389A - Trimmer for sewing-machines. - Google Patents

Description

PATENTED DEC. 27, 1904.

S. H. WHEELER. TRIMMER FOR SEWING MACHINES.

APPLIGATION FILED FEB. 19 1903. I

a SHEETS-SHEET 1.

//v VENTOFI WITNESSES.-

ATTORNEY PATENTED DEC. 27, 1904.

S. H. WHEELER.

TRIMMER FOR SEWING MACHINES.

APPLICATION FILED PEB.19. 1903.

3 SHEETS-SHEET 2.

W/ TNE SSE 8 V M-i=5 A TTOHNEY A ,PATENTED DEC. 27, 1904;

V WHEELER.

TRIMMER FOR SEWING MACHINES.

APPLICATION FILED FEB. I9} 1903 3 SHEETS-SHEET 3.

WITNESSES:

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UNITED 1 STATES Patented December .127. 1904.

PATENT OFFICE.

SAMUEL H. WHEELER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO WHEELER & WILSON MANUFACTURING COMPANY, OF BRIDGE- PORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

TRIMMER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 778,389, dated December 27, 1904.

Application filed February 19, 1903. Serial No. 144,078.

To all whom it may concern:

Be it known that I, SAMUEL H. WHEELER, a

citizen of theUnited States, residing at Bridgeport, in the, county of Fairfield and State of Connecticut, have invented a certain new and useful Improvement in Trimmers for Sewing Machines, of which the following is a full, clear, and exact description.

This invention relates to that class of sewing-machine trimmers by which the surplus material extending beyond the seam is removed simultaneously with the sewing opera tion; and one object of the invention is to positively control the movements of the trimmer or cutter blade so as to cooperate with the feed movements of the material, and thereby effect the trimming while the needle is in the material and while the material is firmly held between the throatplate and clothpresser.

In the present invention the stationary or ledger plate is adjustably secured to the throatplate, while the actuated or trimmer blade is adjustably or otherwise rigidly secured to the feed-dog-carrying bar or made integral with said bar and in such relation to the cloth-feed ing mechanism as to effect the trimming whilethe feed-dog is on its downward return movement or atsuch time as the feed-dog is out of engagement with the material.

As one illustration of the invention it is herein shown in connection with the wellknown Wheeler & Wilson sewingmachine commercially known as Style 61; but only enough of the sewing-machine is shown to cover an operative combination.

In the accompanying drawings, illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is a perspective view showing the scroll-guard, trimmer blade, throat plate, cloth presser, and cloth-plate, together with a binding attachment, illustrating the application of my invention as used in connection with a binder for the production of an ornamental edge. Fig. 2 is avertical section, on a larger scale, taken in the plane of line A B, Fig. 1. Fig. 3 is a front end elevation, partly in section, of a Wheeler & Wilson sewing-machine, substantially such as described in Patent No. 718,988, dated January 27, 1903. Fig. A is atop plan view of the throat-plate and adjacent parts, including the feed-dog and adj ustably-secured stationary or ledger plate. Fig. 5 is an end elevation, partly in section, of the sewing-machine frame, feed-dog-carrying, bar and its operating parts, together with the clothpresser and a modified formof trimmer-blade located close to the needle-hole, as when used to trim 'an ordinary seam. Fig. 6 is a perspective view of the throat plate, clothpresser, trimmer-blade, and stationary or ledger plate illustrated in Fig. 5, with the needleand a portion ofgthe needle-carrying bar. Fig. 7 is a perspective view of the trimmer-blade of Fig. 5.

Fig. 8 is a perspective view of the stationary or ledger plate.

Fig. 9 is a perspective view of a modified form of trimmer-blade.

The needle-actuating shaft 1 is journaled within theusual arm 2 in any suitable manner and is connected with the lower or hookdriver shaft 3 by an endless belt 41., adapted to engage a suitable pulley 5 on the needleactuating shaft 1 and a like pulley (not shown) of one-half its diameter on the lower shaft.

6 is an eccentric fast on the upper shaft 1, and 7 is an eccentric strap-rod, the upper end of which embraces the eccentric 6, while the lower end is pivotally connected, by means of a lever 8, to a feed rock-shaft (not shown) mounted at its opposite ends on pivot-pins 9,

one only of which is shown, (see Figs. 3 and 5,) beneath the machine-frame 10. The for Ward end of the rock-shaft is provided with an arm 11, said arm engaging in any suitable way the slotted portion 12 of the feed-dogcarrying bar 13, said eccentric G and connections causing the usual rise and fall of the feed-dog 14.

15 is an eccentric strap-rod, the upper end of which embraces an adjustable eccentric 16. while the lower end is pivotally connected, by means of a lever 17 to a feed rock-shaft 18, mounted at its opposite ends on pivot-pins 19, one only of which is shown, (see Figs. 2,

3, and 5,) beneath the machine-frame. The 36, threaded into the bar 13, thus permitting 6 forward end of the rock-shaft 18 is provided the blade 28 to be adjusted vertically, the with arms 20, which through the pivotal conscrews 36 acting as well to secure the blade nection 21 transmit forward and return movein its adjusted position.

5 ments to the feed-dog-earrying bar 13, the Fig.9illustrates a modified construction for construction and operation of these parts beeffecting the adjustments of the trimmer-blzule 7 ing substantially as in the patent above re- 28. To the fecd-dog-carrying bar is secured ferred to and as herein illustrated and deby a screw 37 a bracket 38, having a slot 39, scribed, or any approved construction may be permitting the bracket to be adjusted verti- IO used wherein the movements of the feed-dogcally and secured in the required position, and

carrying bar are positively controlled. mounted upon the bracket 38 by a screw is 7 5 The needle 22 and the needle-carrier 23 and a trinnner-blade 4C1, having a slot 42, thus peractuating mechanism may be of any approved mitting the blade 41 to be moved laterally and construction. secured in such position as the nature of the I 5 The throat-plate 24 has a suitable screw 25 production may require.

extending up through a slot 26, (see Fig. 2,) To increase the eiiiciency of the trimmer and said screw serves to engage and secure when applied to the trimming of heavily-sized adjustably in place a ledger-plate 27, which materials, there is provided a scroll-guard 4:3, coacts with a trimmer-blade 28, adjustably secured to the cloth-plate M by a suitable 20 secured to the feed-dog-carrying bar 13. screw 45, which guard acts to lead the sur- Referring to Figs. 1, 3, 5, and 6, the clothplus material back or away from the trimmer- 5 presser 29 is constructed with a presser-foot blade and needle, substantially as illustrated 30 extended sufficiently to firmly hold the in Fig. 1. material upon the ledger-plate 27 during the 46 illustrates a binder attachment of well- 5 time the trimmer-blade 28 is actuated to sever known construction, which or any substitute the material, thus firmly gripping the matetherefor may be used in connection with the 9 rial opposite the cutting edge of the trimmerpresent invention in certain kinds of work. blade during its cutting movement. Figs. 5, 6, and 7 illustrate a trimmer-blade From the foregoing it will be understood 47, having its cutting edge -18 carried back 3 that the eccentric 6 transmits, through the nearer to the needle, as when used for trimconneetions 7, 8, and 11, the rising and falling ming an ordinary seam, differing in this re- 95 movements of the feed-dog-carrying bar 13 spect and also in form from the trimmerand that the adjustable eccentric 16 transmits, blade 28. through the connections 15, 17, and 18, the -19 represents pivot-pin-adjusting screws.

forward and return movements of the feedis the screw for securing the throat-plate.

dog-carrying bar and that the movements of The various forms or trimmeror cutter blade I the trimmer-blade 28 are primarily controlled herein shown and described are characterixwl by the movements of the eccentrics 6 and 16, in having a cutting member rising above and thereby effecting the trimming of the mateoverhanging the machine-frame or throat- A 4 rial by the return drop movement of the feedplate in the line of feed of the work and havdog-carrying bar and while the material is ing a cutting edge on its under side which in- 5 held between the stationary or ledger plate clines upwardly relatively to the ledger-plate, 27 and cloth-presser foot 30 and at such time so that the cut is efleeted ugon the downstroke as the needle is in the material and the feedand when the feed is disengaged from the 45 dog 14 is out of engagement with the matework.

rial, as is shown by the position of the respec- From the foregoing it will be seen that the 1 10 I tive parts 13, 14, and 22, the trimmer-blade. trimmer-blade is actuated to sever the mateand the presser-foot, as illustrated in Figs. 3 rial while the feed-dog is out of contact with and 5, which show these parts in the position the material, and thus the operations of lirst 5 which they occupy just as the trimmer-blade feeding and then trimming alternate, and

completes its downward movement to effect hence is avoided the double labor of feeding 5 the severing of the material. and trimming at the same time, as has been In Fig. 2isillustrateda preferred construethe usual mode of operation in connection tion for effecting lateral and vertical adjustwith trimmer constructions wherein the acments of the trimmer-blade 28. The lateral tuation of the trimmer-blade is indirectly conadjustmentis effected byawedge-shaped block trolled by the movements of the feed-dog or 120 31, located between the feed-dog-earrying bar its carrying-bar. 13 and the trimmer-blade 28, the lower end of The trimmer-blademight bean integral part said block being provided with aslot 32,which of or be attached to the feed-dog without deis acted upon by a screw 33 to move the block parting from the spirit of the invention.

in opposite directions. To effect the vertical hat I claim is 5 adjustment of the blade 28, the shank or up- 1. In a sewing-machine, a feed mechanism right portion 34 of the blade 28 is provided including a feed-dog-carrying bar, means to with a slot 35, through which pass the screws move it positively up and down, and separate means to move it positively back and forth, combined with a stationary ledger-plate, and a trimmer-blade having an overhanging cutting member rising above the ledger-plate in the line of feed and provided on its under side with a cutting edge inclined upwardly from the ledger-plate, said trimmer-blade rigidly mounted upon the said bar and partaking of its movements and serving to cut upon the return drop of the said bar and while the feeld-dog is out of engagement with the materla 2. In a sewing-machine, a presser. a feed mechanism including a feed-dog-carrying bar, means to move said bar positively up and down and separate means to move it positively back and forth, combined with a throatplate, a ledger-plate stationarily secured to said throat-plate, and a trimmer-blade having a cuttingmember rising above and overhanging. the throat-plate alongside the ledger-plate and provided on its underside with an upwardly-inclined cutting edge in the line of feed, said trimmer blade rigidly mounted upon the feed-dog-carrying bar and movable by it upon its return drop to effect the trimming of the material being sewed while the material is firmly held between the throatplate and presser and the feed-dog is out of engagement with the material.

- 3. In a sewing-machine, afeed mechanism comprising eccentrics, a feed-dog and a feeddog-carrying bar, and connections, including eccentric-straps, between said eccentrics and feed-dog-carrying' bar for giving movements to said feed-dog, in combination with a ledgerplate and a trimmer-blade, the latter carried rigidly by said feed-dog-carrying bar, and

provided with an overhanging cutting member rising above the ledger-plate and having an upwardly-inclined cutting edge in the line of feed which cooperates with said ledgerplate to sever the material as the feed-dog is making its return movement preparatory to the feeding of the material.

4. In a sewing-machine, a feed mechanism comprising a presser, a feed-dog and a feeddog-carrying bar, eccentrics for positively controlling the movements of said feed-dog, and a throat plate, in combination with a ledger-plate and a trimmer-blade, the latter carried rigidly by said feed-dog-carrying bar and provided with a cutting member rising above and overhanging the throat-plate in the line of feed and having an upwardly-in clined cutting edge on its under side cooperating with said ledger-plate to sever the material as the feed-dog is making its return movement preparatory to the feeding of the material and While the material is firmly held by the presser on the throat-plate.

5. In a sewing-machine, a feed mechanism comprising eccentrics, a feed-dog and a feeddog-carrying bar, and connections, including eccentric-straps, between said eccentrics and the feeddog-carrying bar for giving movement to said feed-dog, in combination with an adjustably-secured ledger-plate and a trimmer-blade, the latter adjustable upon and rigidly carried by said feed-dog-carrying bar and having an overhanging cutting member rising above the ledger-plate and provided on its under side with a cutting edge inclined upwardly from the ledger-plate and cooperating with said ledger-plate for severing the material while the needle is in the material and the feed-dog is making. its return movemelnt preparatory to the feeding of the mater1a v In testimony whereof I have hereunto set my hand this 17th day of February, A. D. 1903.

SAMUEL H. WHEELER. Witnesses:

F. W. OSTROM, C. N. WOR'IHEN.

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