Improvements in Motors for Sewing Machines and the like.
Year: 1889

page_text: Date of Application, 7th May, 1889-Accepted, 3rd Aug., 1889
Improvements in Motors for Sewing Machines and the like.
We WILLIAM HENRY CLAYTON and CHARLES AARON SORING. both of Atlanta
in the County of Fulton and State of Georgia. United States of America, gentleman,
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
This invention has relation to motors for sewing machines and the like and will be
fully understood from the following description when taken in connection with the
annexed drawing in which
Fig. 1 is a side elevation of the motor constructed according to our improvements
with the drum gear partly in section to show the spring therein, and the swivel of
the brake rod also in section
Fig. 2 is a plan view of the same, the belt connections being omitted.
Referring by letter to the said drawing, A indicates the main frame which is
suitably formed to support the shafts of the various gears of the operating mechanism
and is provided with feet as a whereby it may be secured to a suitable base in a
convenient position to be connected with a sewing machine
Secured to one side of the main frame are two brackets b which have eyes to form
bearings for a crank shaft (Journaled therein This crank shaft which has its crank D
at one end is provided with a vertically fixed bevel gear E which meshes with a
vertically fixed bevel gear F secured on one end of the shaft G passing through the
drum gea. Tho horizontal shaft G is suitably Journaled in the main frame and
carries loosely thereon a drum gear H which revolves around said shaft, the periphery
of said drum gear being provided with teeth for the purpose which will be presently
described, and this horizontal shaft G is furthermore provided with a vertically fixed
ratchet wheel I which is designed to be engaged and prevented from backward
movement by a pivoted pawl J as shown.
K indicates a flat spring which has one end secured to the shaft G and its opposito
end secured to the drum gear as shown at d It will thus be seen that when motion
has been imparted to the main operating shaft G through the medium of the crank
shaft and bevel gearing, the spring will be wound upon the said shaft G and prevented
from unwinding by the pawl and ratchet brake or by a friction device of suitable
construction, if preferred
L indicates a horizontal shaft which is provided with two vertically fixed gears of
different diameters, the smaller one of which meshes with the drum-gear and the
larger one with a pinion M which is also secured to a horizontal shaft N carrying a
larger gear or pinion P and this latter gear meshes with a smaller pinion R which is
fixed to the shaft carrying the drive pulley S.
V, indicates an endless drive belt which connects the pulley S with the band
wheel W of a sewing machine or the like which is to receive motion
In operation when it is desired to connect the motor with a sewing machine or
other machine having a band wheel it is simply necessary to make the belt connection
between the band wheel of the machine to be run and the pulley S after which the
pawl J is thrown into the teeth of the ratchet 1 when, by turning the crank handle D
the spring will be wound upon the main operating shaft G. Now it will be seen that
the action of the spring in its tendency to unwind will rotate the drum gear H around
shaft G and which through the medium of the intermediate gear will rotate the
pulley S and drive the belt thereon.
Having described the construction and operation of the motor proper, we will now
describe our tension and brake device. e indicates a longitudinal rod which has a
bearing near its forward end in an arm or eye f fixed to the main frame and is
D27

page_text: provided with a threaded portion as shown at g which is designed to engage an
internal thread in an arm which latter is also secured to the main fiame.
This longitudinal rod e is provided at one end with a friction eye or loop which
receives the shaft T bearing the pulley S and at its opposite end with a hand wheel k
This rod e is composed of two parts which are united by a swivel Z so that while the
threaded part may turn in the threaded eye the part having the friction eye will
move back and forth.
It will thus be seen that by means of this rod, a brake may be offected or the
force of the motor and the machine to which it is connected, retarded by turning the
said rod in one direction while the full effect of the spring and its cooperating parts
may be attained by turning the said rod in the opposite direction so as to bring the
friction eye out of engagement with the shaft T.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
In a sewing machine motor substantially as described, the combination with the
main flame for supporting the driving geal having an internally threaded bearing of
the band pulley shaft and the brake rod composed of two parts united by a swivel,
one of the said parts being threaded externally to engage threads in the bearing on
the main frame and the other part provided with a friction eye to receive the said
band pulley shuft, substantially as specified.
Dated this 7th dow of May 1980
BERNHARD DUKES,
226, High Holborn, London, W.C, Agent for the Applicant