US809416A - Fan attachment for sewing-machines. - Google Patents

Description

No. 809,416. PATENTED JAN. 9, 1906.

L. WEINSTEIN & J. PERLSTEIN.

PAN ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED PER. 25. 1905.

UNITED STATES PATENT OFFICE.

FAN ATTACHMENT FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed February 25, 1905- Serial No. 247,288.

T0 on whom it may concern:

Be it known that we, LEOPOLD WEINSTEIN and JOSEPH PERLSTEIN, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Fan Attachments for Sewing-Machines, of which the following is a specification.

Our invention relates to certain new and useful improvements in fan attachments for sewing-machines, and it seeks to provide a device of this character adapted to be secured to the fly-wheel of the ordinary type of sewing-machines now in use without requiring any change in their present construction.

Furthermore, the object of the invention is to provide a fan attachment by which the fan may be regulated either to run at the same rate of speed as the fly-wheel of the sewing-machine or at a slower rate, or it may be locked in a stationary position, and when in such stationary position the rotation of the fiy-wheel of the sewing-machine will not be interfered with.

Furthermore, the object of the invention is to provide a guard completely surrounding the fan in order that no obstructions may accidentally come in contact with the vanes of the fan and at the same time the guard will not materially interfere with the air-currents from the fan.

Finally, the object of our invention is to provide a convenient fan attachment for sew ing-machines simple in construction, efficient and durable in practice, and inexpensive of manufacture.

side elevation of the neck of a sewing-ma chine, illustrating our invention, partly in section. Fig. 3 is a top plan view. Fig. 4 is a vertical section of the fan and means for attaching the fan to the fly-wheel.

In the drawings, 1 denotes the arm of a sewing-machine of any preferred construction mounted upon a frame 2 and provided with a fly-wheel 3. g The outer end of the hub piece by means of a spring 20.

of the fly-wheel is provided with a screwthreaded aperture 4. An axle 5, having a collar 6 and provided with a screw-thread at each end, is secured to the fly wheel by threading one end of the axle in the threaded aperture of the fly-wheel. The collar 6 is secured on the axle near one end and approximately at the terminus of the threaded portion in order that when the end is, threaded in the aperture of the fly-wheel the collar may form an end bearing for the hub of the fan.

Rotatably mounted on the axle 5 is a fan comprising a suitable hub 7 and arms 8, formed integral with the hub, to which are attached suitable vanes 9. The hub 7 is provided with a central aperture, and at one end of the hub we provide an annular recess 10, in which a spiral spring 11 is seated. On the outer end of the axle 5 a thumb-nut 12 is threaded, the inner surface of the nut bearing against the spiral spring 11.

The guard for the fan comprises a circular piece 13, to which are rigidly attached fenders 14, which are secured thereto on the side nearest to the fly-wheel of the sewing-machine. On the outer edge of the circular piece 13 We hinge a guard or fender 16. The hinge permits the guard to be opened and the fan inserted therein. We also provide the circular piece with a stud 15, which is adapted to engage with the socket 17, suitably secured to the frame of the machine. A thumbsc rew 18, carried by the socket, holds the stud rigidly in the socket and prevents the guard from turning and coming in contact with the fan. A spring locking-pin 19 is secured on the outer surface of the circular The spring permits the pin to be inserted in an aperture in the circular piece 13 and is of sufiicient length to permit the vanes of the fan to strike against said pin when it is desired to prevent the rotation of the fan.

When the spring locking-pin is not used for the purpose of locking the fan, it is withdrawn from the hole in the circular piece and moved to one side of said iece.

It will be observed that in the operation of our device afterthe' fan is mounted on the axle the spiral spring is inserted in the annular recess and the thumb-nut threaded on the axle until it bears against the outer end of the spiral spring. The distance the thumb-nut is threaded on the end of the axle will govern the amount of ressure that is exerted by the opposite end 0 the fan-hub against the collar 6. If it is desired to operate the fan at the same speed as the fly-wheel, the thumb-nut is the fan will operate in unison with the flywheel. If the operator does not wish the fan to revolve as fast as the fly-wheel, the pressure against the spiral spring is released and the fan will be governed by the pressure exerted between the thumb-nut and spring.

It will be observed that by our device We have provided means for governing the rotation of the fan by frictional engagement of they hub of the fan and the collar formed on the axle.

The construction, operation, and advantages will, it is thought, be understood from the foregoing description, it being noted that various changes may be made in the proportions and in. the details of construction without departing from the scope of the invention.

Having fully described our invention, what We claim as new, and desire to secure by Letters Patent, is-

1. In a fan attachment for sewing machines, an axle provided with a collar and having screw-threaded ends, a fan rotatably mounted on the axle, means for regulating the frictional engagement between the fan and. collar on the axle substantially as described.

2. In a fan attachment, an axle provided with a screw-thread at each end and having a collar secured thereto, a fan having a hub provided with an annular recess at one end rotatably mounted on said axle, a thumb-nut threaded on the outer end of the axle where by the fan is prevented from accidental dis- 4c placement with said axle as and for the purpose described.

3. The combination with the fly-wheel of a sewing-machine, of an axle provided with a collar and having one end threaded in an aperture in the fly-wheel, and a fan rotatably mounted on the axle and means for holding the fan on the axle substantially as set forth.

4. The combination with a sewing-machine of an axle carried by the fly-wheel of the sewing-machine and a fan rotatably mounted on said axle, a thumb-nut threaded on the axle and a spring inserted between the thumb-nut and hub of the fan as and for the purpose set forth.

5. In a device of the character described, an axle provided with a stationary collar threaded in the hub of afly-wheel of a sewingmachine, a fan on the axle end provided with an annular recess in the outer end of its hub, a spiral spring seated in said annular recess, a thumb-nut threaded on the outer end of the axle whereby the tension of the spring is regulated, as and for the purpose set forth.

6. In a fan attachment for sewing machines, an. axle having a stationary collar and provided with screw-threaded ends secured to the fly-wheel of a sewing-machine, a fan having a hub provided. with an annular recess at one end rotatably mounted on said axle, a spiral spring seated in the annular recess of the fan-hub, a thumb-nut threaded against the spiral spring on the axle, substantial] y as described.

In testimony whereof we have aflixed our signatures in presence of two subscribing Witnesses.

LEOPOLD WEINSTEIN. JOSEPH PERLSTEIN.

Witnesses:

MAX STENGEL, JoNAs O. LUNDE.

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