US978832A

US978832A - Thread take-up for sewing-machines.

Info

Publication number: US978832A
Application number: US56873210A
Authority: US
Inventors: William R Blair
Original assignee: Landis Machine Co
Current assignee: Landis Machine Co
Priority date: 1910-06-24
Filing date: 1910-06-24
Publication date: 1910-12-20
Anticipated expiration: 1927-12-20

Description

W. R. BLAIR. THREAD TAKE-J11? FOR SEWING MACHINES.

APPLICATION FILED. JUNE 24, 1910.

Patfinted Dec. 20, 19%.

r E jnw WITNESSES.

UNITED STATES PATENT OFFICE.

WILLIAM R. BLAIR, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LANDIS MACHINE COM- PANY, OF ST. LOUIS, MISSOURLJL CORPORATION OF MISSOURI.

THREAD TAKE-UT FOR SEWING-MACHINES.

Specifidation of Letters Patent. Patented Dec. 20, 1910.

Application filed June 24, 1910. Serial No. 568,732

' To all whom it may concern:

Be it known that I, WILLIAM R. BLAIR, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain art to which it appertains to make and usethe same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a plan view of my improved take-up. Fig. '2 is a side elevational view. Fig. 3 is an elevational view similar to Fig. 2, but showing the parts ofthe device in another position.

This invention relates to a new and improved form of take-up device, and is particularly adapted to be used in connection with wax thread sewing machines of the well known type, and illustrated in the patent7to Campbell No. 374,936, December 20, 188 -My improved device consists of two cooperating arms to perform the take-up action, and a thread clamping device all of which are operated from the same means.

My invention consists in the details of this operating means as will be pointed out in the accompanying claims.

In the accompanying drawings 1 indicates a bracket to be mounted on the over hanging arm of the ordinary wax thread typeof sewing machines. On this bracket is a recessed boss within which is mounted the thread clamping device 3 consisting of A two jaws 4 and 5, which age operated to clamp the thread therebetween. This tension or clamp is more fully described in my application filed concurrently herewith. On a stud 6 is pivotally mounted the thread lever 7 having a thread engaging roll 8 at one end and thread engaging arms 9 and 10 Pivoted on this same stud 6 is the take-up lever 11 with thread roll 12 at one end, and a segmental gear 13 at the opposite end. On an adjacent stud 1 1 is mounted a combined segmental ear and cam 15 having teeth 16 which intermesh with the teeth on the gear 13. At one side of this device 15 is mounted a cam lug .17 which co-acts with a cam surface 18 on the lower end of the jaw 4 in order that in the movement of the part 17 the jaw 4 may be raised from its contact with the jaw 5. The member 15 is connected by means of a link 19 to a pivot stud 20 on the thread lever 7. Connected with this same stud 20 is an operating link 21 operatively connected to the main shaft of the machine in the well known manner. The thread leads over the roll 8 and under the roll 12 through an eye 22 on thebracket 1 between the jaws 4 and 5 of the thread clamp through the arm 52 and over the'guide roll 23 fastened on the bracket 1, through the arm 10 to the wax pot.

The operation of my device is clear from the showing in Figs. 2 and 3. As the link 21 is moved down by the operating means the opposite end of the thread lever 7 is moved up, and the lever 11 is moved down through the

segmental gearing

13 and 16, and link connection 19 to the stud 20. Simultaneously the cam lug 17 is removed from the cam surface 18 on the jaw 4 to allow the said jaw to be moved'down by spring pressure to clamp the thread between the jaws 4 and 5. Also at this time the arms 9 and 10 are moved down on either side of the guide roll 23 to draw the thread through the wax pot. I

The essential features of my invention are the mounting of the thread, and take-up levers on the same pivot stud, and also having a set of segmental gears to actuate-the take-up lever.

I am aware that minor changesin the con struction, arrangement and combination of the various parts of-my improved device can be made and substituted for those herein shown and described Without departing from the nature and spirit of my invention, the scope of which is indicated in the accom anying claims.

I laim:

1. A take-up device, comprising a' thread 7 clamp, a lever with a thread engaging part j at each end, means, for operating the same,',.

an auxiliary lever, and -means connecting means. 1

3. A take-up device, comprising a lever with a thread engaging part, a second lever actuated from the first lever, a tension device, and means connected to the operating means for the second lever for actuating the tension device.

4:. A take-up device comprising a lever with a thread engaging part, a. second lever with a thread enga ing part having a segmental gear attac led, an independently mounted gear meshing with said segmental gear, and a. link connecting the latter gear with the first mentioned lever.

5. A take-up device comprising a lever with a thread engaging part, a second lever with a thread enga ing part having a segmental gea-r attac led, an independently mounted gear meshing with sand segmental gear, a thread clamp, means for operating saidindependently mounted gear, having a projection adapted to engage and. operate the'thread clamp.

In testimony whereof I hereunto my signature in the presence of two Witnesses, this 21st day of June, 1910.

VVILL'IAB'I R. BLAIR.

\Vitnesses M. P. SMITH, J. lV. Curr.