US1727850A - Trimming mechanism - Google Patents

Description

Sept. 10, 1929. EYATES 1,727,850

TRIMMING MECHANISM Original Filed May 9 1916 Patented Sept. 10, 1929.

UNITED STATES PATENTFOFFICE ARTHUR EDWARD YATES, F FLIN'ISTONE, GEORGIA, ASSIGNOR TO CRYSTAL SPRINGS BLEAGI-IERY 00., OF CHIGKAMAUGA, GEORGIA, A CORPORATION OF GEORGIA.

TRIMMING MECHANISM.

Substitute for application Serial No. 96,386, filed May 9, 1916. This application filed July 24, 1926. Serial No. 124,657.

My invention relates to an improvement in trimming mechanism for sewing machines, and is a substitute for my application Serial No. 96,386, filed May 9, 1916. The objectprimarily is to cut the raw edges of over-lapped material simultaneously with the stitching operation.

With this object in view, my invention comprises two sets of trimming mechanism, one set located on each side of a needle or needles, said mechanism being operated by moving parts of the sewing-machine.

In the accompanying drawings Fig. 1 is a view in side elevation;

Fig. 2 is a sectional view; and

Figs. 3 and 4 are details.

A. represents the head of any approved type of sewing machine, the numeral 1 being the reciprocating needle rod and 2 the needle of which there may be one or more, side by side accordingly, as desired.

The needle rod is operated in the present instance by connecting rod 3 extending from the disc 4 on the rotary shaft 5, to the sleeve 6 secured to the needle rod.

The trimming mechanism may be of any desired form and attached in any approved manner and operated from any moving parts of the machine.

As one convenient exemplification of the machine, an L-shaped arm 7 is bolted securely to the one side of head A of the machine as shown in Fig. 1, the lower L-end forming the fixed or lower blade 8 of one trimming mechanism.

The moving blade 9 is pivoted at 10 at the angle of the L-shaped arm, as shown in Fig. 1. This blade 9 has an arm 11 held up to receive the fabric by a spring 12 extending from the pivoted arm 11 to the fixed or stationary arm 7, as shown in 1. A connecting bar 13 pivotally connected with the arm 11 extends to the stud 14. on the reciprocating guide pin 15, which is slidably mounted in the hole 16 which it fits, at the lower end of the head A, while the stud 14 is guided in an elongated vertically disposed slot 17 in the head A, which it fits, the upper end of the guide pin 15 being in the direct path of the lower end of the connecting bar 3, whereby the pin 15 and stud 14 are driven downwardly, with each movement of the needle rod 1, thereby causing the trimmer blades 8 and 9 to open and close and cut the fabric or other material 18 extending therebetween. I

Another pair of blades 8 and 9', as shown in Figs. 3 and 4, are operated by some moving part of the machine such as rock shaft 19, arm 20, and connecting rod 21, asshown in Figs. 2 and 3, to simultaneously cut the edge of the fabric or other material on the other side of the needle or needles, as shown in Fig. 2.

While it is obvious that the strips of cloth or other material to be sewed together might travel, this particular form of trimmer is in-' 66 tended for a sewing machine which travels across the edges of the fabric, which edges are adapted to be sewed together.

I claim: v I

1. The combination of I a reciprocating 70 needle rod arranged in a sewing machine head, means for actuating said rod, a stationary arm attached to the head and terminating in a fixed scissors blade, a spring-actuated movable blade pivoted to the stationary arm, and a connecting bar extending from'the movable blade to a combined stud and pin located in position to be actuated by the means for actuating said rod. I

2. The combination of a reciprocating needle rod, means for actuating the latter, a sewing machine head in which the needle rod reciprocates, a combined stud and pin slidably mounted in the head in vertical alignment with the means for actuating the needle, a 35 stationary arm connected to the head and terminating in a fixed scissors-blade, and a spring-actuated movable blade pivoted to said fixed blade and connected by a link to said i able blade is actuated.

3. The combination of a reciprocating needle rod arranged in a sewing machine head, means for actuating said rod, an arm attached to the head and having a scissors blade fixed thereto, a pivoted scissors blade, a combined stud and pin slidably mounted in the head in position to be operated by the rod actuating means, and means for operatively 100 reciprocating stud and pin, whereby said movconnecting the combined stud and pin with the pivoted scissors blade.

4. The combination with a reciprocating 5 needle rod and means for actuating said rod,

of a fixed cutting blade, a pivoted cutting blade arranged to cooperate with the fixed blade and a combined stud and pin operatively connected with the pivoted cutting blade and located in position to be actuated by the means for actuating the needle rod.

In testimony whereof I aflix my signature.

ARTHUR EDWARD YATES.

CERTIFICATE OF CORRECTION.

Patent No. 1,727,850. Granted September 10, 1929, to

ARTHUR EDWARD YATES.

It is hereby certified that the above numbered patent was erroneously issued to "Crystal Springs Eieachery Co", Whereas said patent should have been issued to "Curtis 5: Marble Machine Co., of Woreestor, Massachusetts, a Corporation of Massachusetts", said corporation being assignee by meshe assignments, of the entire interest in said invention, as shown by the records of assignments in this office; and that the said Letters Patent should he read with this correction therein that the same may conform to the record of the case in the Patent Cftioe.

Signed and sealed this 15th day of October A. D. 1929 M. J. Moore, (Seal) Acting Commissioner of Patents.

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