US645555A - Feeding mechanism for sewing-machines. - Google Patents

Description

no. 545,555. Pafented'mar. 2n, |900.

P. mem..

FEEDING MEGHANI'SM F03 SEWING MACHINES.

(Application led June 8, 1899.)

(No maal.)

UNITED STATES PATENT EEICE.

PHILIP DIEI-IL, oE ELIZABETH, NEw JERSEY, ASsIeNoR To rrI-IE SINGER MANUFACTURING COMPANY, oE NEw JERSEY.

FEEDING NIECHANlSNI FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 645,555, dated March 20, 1900.

Application filed June 3, 1899. Serial No. 719,182. (No model.)

To all whom t may concern,.-

Be it known that I, PHILIP DIEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Feeding Mechanism for Sewin g-Machines, of which the following is a speci- Iication,reference beinghad therein to the accompanying drawings. w

This invention relates to that class of feeding mechanisms forsewing-machines in which the work is fed by the needle carried by a swinging and reciprocating needle-bar with the assistance of a helper-bar serving as an auxiliary feeding device and also as an auxiliary presser-bar, the object of the invention being to provide a feeding mechanism of this kind which will be elfective, reliable, and positive in operation.

In the accompanying drawings, Figure 1 is a front end view, with the face-plate removed, of the head of a sewing-machine embodying the invention. Fig. 2 is a similar but partial view with the needle and helper bars removed. Fig. 3 is a detail view showing the feed-slide and its operating-lever, and Fig. 4 is a detail view of the feed-regulating device.

The present invention is shown as being applied to the form of sewing machines embraced by my United States Patent No. 612,409, of October 18, 1898,in which the worksupport A2 is on the depending front end portion of the head A at the forward end of the bracket-arm; but it will be understood, of l course, that the invention is adapted for use in other kinds of sewing-machines in which a needle-feed is desirable. The needle-bar B', carrying the needle b, is provided with a heart-cam cross-head b', entered by a crankpin or roller-stud c on the crank-disk c at the forward end of the driving-shaft.

D is the helper-bar or auxiliary presserbar, vcarrying the feeding presser-foot d, and E is the main presser-bar, provided with the presser-foot e. To the helper-bar D is pivotally attached the lever F, having a cam-slot f, entered by a pin or roller-stud b2 on the needle-bar, said lever having a forked arm f', engaging a pin e' on an arm or bracket e2, attached to the presser-bar E, said lever F serving to impart alternating up and down movements to the presser-bar and helper-bar, so that ythey will be alternately lifted and depressed in a well-known manner.

The needle and helper bars have their upper bearings in an oscillating cheek-block a, mounted in the upper part of the head A', and said bars have their lower bearings in a second oscillating cheek-block ct, mounted in a horizontally-movable feed-slide block or feed-bar a2, provided with a rib a3, entering a horizontal groove a5 in a cross-bar a6 of the head A.

G is the feed-lever, pivotally supported by a pin a4, with which the feed-slide d2 is provided, said feed-lever being forked at its upper end to embrace a feed-cam g at the for-A ward part of the drivin g-shaft and behind the crank-disk c', said lever having a slot g', entered by a pin 7L on a feed-regulating arm 7L', attached to a small shaft H, having a second arm or handle h2, by which-its position may be changed to regulate the feed. The pin 7L serves as an adjustable fulcrum for the feedlever G, and by raising or lowering said pin in the slot g of said lever the horizontal throw of the feed-slide block or feed-bar a2 may be lengthen ed or shortened to lengthen the horizontal or feeding movements of the needle and helper bars embraced by the oscillating cheek-block a', mounted in said feed-slide block or feed-bar, as will be readily understood.

The feed-regulating device is in the present instance retained in any desired position of adjustment simply by friction, the shaftl H being fitted somewhat snuglyin its bearing.

Having thus described my invention, I claim and desire to secure by Letters Patentl. In a needle-feed sewing-machine, the combination with a needle-bar provided with a pin or'roller-stud, of a main presser-bar, a helper-bar or auxiliary presser-bar, a lever connecting said presser and helper bars and provided with a cam -slot entered by'said roller-'stud on said needle-bar, a horizontally-v movable feed-slide block provided with an oscillating cheek-block embracing said nee' dle and helper bars, a feed-lever having a IOO pivotal connection with and being thus sustained by said feed-slide block, and a cam for operating said feed-lever.

2. In a needle-feed sewing-machine, the

combination with the needlebar and helper-V othei` end with means for positively engaging said feed-cam, and a swinging feed-regulating arm provided with a fulcrum-pin entering the slot in said feed-lever, so that by varying the position of said fulcrum-pin the feeding movements of the said needle and helper bars may be regulated.

3. In a needle-feed sewing-machine, the combination with the machine-head having a horizontal cross bar or portion, as 0,6, provided with a slot or recess, of a horizontallymovable feed-block a portion of which extends intoand is adapted to slide in said recess, a needle-bar and a helper-bar both of which are vertically movable through said feed-block, a feed-cam, a feed-lever pivot-ally a presser-bar and means for alternately raising and lowering said helper and presser bars and for operatinglsaid needle-bar, of a feed-slide block provided with an oscillating cheek-block embracing said needle and helper bars, a feedlever pivotally connected with said feed-slide block and provided with a slot, a cam for operating said feed-lever, and a swinging feed-regulating arm provided with an adjustable fulcru r11-pin entering said slot in said feed-lever so that by varying the position of said fulcrum-pin the feeding movements of the needle and helper bars may be regulated.

In testimony whereof I` affix my signature in the presence oi' two witnesses.

PHILIP DIEHL.

Witnesses:

HENRY J.-MILLER, HAROLD W. BROWN.

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