US172308A - Improvement in sewing-machines - Google Patents

Description

B. FRESE.

, SEWING-MACHINE. N'o.172,308. Patented Jan.18,1876.

".PETERS. PHOTCLLITMOGHAPNEFL WASHINGTON. D C.

shaft beneath the bedplate.

a. dis the bobbin.

N DSTAT PATENT DFFIO'E.

BERNARD FRESE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 172,308, dated January 18, 1876; application filed December 9, 1875.

To all whom it may concern:

Be it known that I, BERNARD FRESE, of

I Chicago, Cook county, and State of Illinois,

have invented new and useful Improvements in Sewing-Machines, of which the following is a full description, reference being had to the accompanying drawings.

Figure l is a plan, with a portion of the l driving-plate cut away. Fig. 2 is a section on line a; of Fig. 1; Figs. 3-, 4., and 5, views of the shuttle, showing the holder of the bobbin in 3 and 5 Fig. 6, a section of the bobbin-holder with the bobbin in place. 7 Fig. 7 .shows the bobbin-holder.

The principal object of my invention is to so construct a rotating shuttle and shuttlerace that the thread will not be twisted by f the rotation of the shuttle, and this I accomplish by providing a bobbin-holder which can rotate in the shuttle, its rotation being effected by means of angular ribs or cogs on one end is circular ,0, the plate which drives the shuttle. It is cut away. on one side to allow the shuttle to beplaced by its side in the race. D is the shuttle, in its place in Figs. 1 and 2. E is a shaft, upon which the shuttle-driving plate (3 is secured. Suitable devices for driving the needle can be secured to the same a a, ribs or projections upon the bottom of the shuttle-race. b is the bobbin-holder; o, ribs or angular. cogs upon the heel ofthe bobbin-holder. There are as many ribs or cogs c .as there are projections As shown, it is inserted into the holder 11 through the end 0, which is open. It has apoint at each end, as usual. One end rotates in theend f of the holder. .9 h are bearings, secured one in each end of the shuttle, to receive the bobbin-holder and bobbin. 9 receives the bobbin-holder, and it receives one end of the bobbin. They are .in the heel of the shuttle.

movable but not removable, and the springs hold them in place, and permit the insertion and removal of the holder and bobbin into the shuttle. One end of theholder rotates in its bearing 9. Theother end rotates The bobbin and bobbin-holder both rotate independently of each other, each having its own bearings.

. The holder might be so made that the bobbin could be inserted from the side, in which case the heel would be the same, substantially, in form as the other end, the ribs excepted, and the holder would then rotate in the bearings g h. J T

The under side of the shuttle is cut away (see Fig. 5) to allow it to passoverthe projections a.

There is an opening in one side of the bobbin-holder I), having projections on one side thereof, (see Fig. 7,) and by passing the thread around or over one or more of these the tension can be adjusted.

When the thread passes the heel of the shuttle it (the heel) should not be in contact with the driving-plate G; and I carry the shuttle forward a little, at the proper time, by means of the following devices: m is a hook, pivoted to the'under side of G, a portion of which is thinner than at the center. a is a projection upon the surface of B. r is a hole in the shuttle. s is a spring; it, an arm connected with the hook. When it comes in contact with n the hook on will be thrown out into the hole 1", and will carry the shuttle forward a little; but as soon as t passes a the hook will be returned to its former position by the spring 8.

The dotted lines in Fig. 1 indicate the posi tion and form of the parts m n t s. 1

c is a light spring.

The thread from the bobbin is to pass first through the opening inthe shuttle, (shown in Fig. 3;) then around or over such number of the projections as the proper tension requires; then through 9,- then out through the shuttle at j. l

In use the thread is drawn from the bobbin, as usual; but while the shuttlemakes one revolution in the race the bobbin-holder makes a revolution on its axis, carrying the bobbin with it, and preventing the twisting of the thread.

In Fig. 6 the parts 9 h are shown removed from the shuttle, in which they belong.

Instead of the plate 0, a fork could be used to drive the shuttle.

What I claim as new is as follows:

1. The circular shuttle-race B, provided with projections a, substantially as specified.

2. The bobbin-holder b, provided with cogs 0, substantially as specified.

3. The driving-plate O and shuttle D, in combination with the hook m, arm 1., projection n, and spring 8, for lifting the shuttle as the thread passes its heel, substantially as specified.

BERNARD FRESE.

Witnesses:

E. A. WEST, O. W. BOND.

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