US1233992A - Needle-guide-operating mechanism for sewing-machines. - Google Patents

Description

s. A. DOBYNE.

NEEDLE GUIDE OPERATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAR-22. I916.

Patented July 17, 1917.

STEPH EN A. .DOBYNE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO CPION SHOE MACHINERY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MIS- SO'UZBII.

'NEEDLE-GUIDE-OPERATING ILVJ'JFM'J:

Specification of Letters'latent.

ISM FOB, SEWING-MACHINES.

original application filed March 12, 1913, Serial No. 753,751. Patent No. 1,201,160, dated October 10, 1916. Divided and this application filed March 22, 1916. Serial No. 85,791.

To all whom it may concern: I

Be it known that I, STEPHEN A. DOBYNE, a citizen of the United States, and residing at St. Louis, in the State of Missouri, have invented acertain new and useful Improvement in Needle-Guide-Operating Mechanism for Sewing-Machines, of which the following is a specification. v

This invention relates to sewing machines and more particularly to the needle guide operating mechanism therefor.

One object of this invention is to provide novel mechanism for operating the needle guide, whereby this needle guide will be operated positively in both directions.

Further objects will appear from the detail description taken in connection with the accompanying drawings, in which:

lFi re 1 is a side elevation of the sewlng mach ne embodying this invention;

Fig. 2 is a detail side elevation of the neede operating means; Fig. 3 is a front elevation; and Fig. 4 is a section on the line 4.4 F1g.2, parts being shown in elevation.

Referring to the accompanying drawing, 15 designates a column upon which is mounted a head or base 16, having a pair of brackets, one of which is shown at 18 for supporting the drive shaft 19. A series of cam wheels, one of which is shown at 23, are keyed to the drive shaft. A needle 29 is mounted in a lug 109 on the head or base 16, and this needle is provided with the usual needle guide 115. The parts so far described are fully disclosed in my co-pending application, Serial Number 7 53,751, filed March 12, 1913, which matured as Letters Patent 1,201,160, dated October 10, 1916, and of which the present application is a division. A bell crank lever 95 is mounted on a shaft 110 journaled in the bracket 18 and this lever has one arm provided with a cam roll 96 coiiperating with the cam groove 97 in the cam wheel 23. The other arm of the bell crank lever has a tooth 98 meshing with teeth 99 on a lever 100 pivoted at 111 intermediate its ends on the lug 109 on the machine head, and having at its other and teeth 101 meshing with a gear segment 102 on a shaft 112 mounted in the lug and having a gear 113 meshing with teeth 114 on the needle guide 115. The teeth 98 and 99 are shaped toform the teeth of a bevel gear. The needle guide operating mechanism described is especially adapted for assem- Patented July it, tart.

blage, together with the other mechanisms, Y

in the machine disclosed in the above noted application, while the provision of the lever 100 cooperating with the bell-crank lever 95 permits of the cam groove 97 being formed in the periphery of the cam wheel 23, thereby placing said groove at a point farthest removed from the shaft 19 and adapting the cam to exert its maximum force in actuating the mechanism which operates the needle guide.

The operation of the needle guide is positive and it is, therefore, insured that it will be in correct timed relation with respect to the needle. The operating mechamsm is so arranged as to avoid interference with the other mechanisms of the machine. This mechanism is, therefore, characterized by simplicity of construction and certainty of operation.

It is obvious that various changes may be made in the details of construction without departing from the spirit of this invention, and it is therefore to be understood that thi invention is not to be limited to the specific construction shown and described.

Having thus described the invention, what is claimed is:

1. In a sewing machine, a needle guide, and operating means for said needle guide 'comprisin a pair of toothed levers in mesh therewith, a lever connected with said gear, guide and supported on said laet bracket, and an operating lever havin a toothed and an operating lever geared to said first connection with said first name lever. named lever and supported on said first 10 4. In a sewing machine, a head having a bracket.

5 shaft supporting bracket a needle guide In testimony whereof I afiix my signature supporting bracket, a needle guide supportthis 3 day of January, 1916. ed thereby, a lever geared to said needle STEPHEN A. DOBYNE.

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