Improvements in Mechanism for Driving Sewing and other Machines by Foot Power.
Year: 1894

page_text: Date of Application, 19th Dec., 1894
Complete Specification Left, 19th Sept., 1895-Accepted, 26th Oct., 1895
$
:
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Driving Sewing and other
Machines by Foot Power.
I, NICOLAS ALPHONSE AUBERTIN Practical Chemist of 3, Mornington Place,
Hampstead Road, N.W. in the County of London do hereby declare the nature of
this invention to be as follows :-
My improvement has for its objects to improve the system of pendulous or other
treadle apparatus for sewing and other machines whereby: 1° Dead centres are
abolished or avoided; 2° The same rotary motion always preserved, if desired,
without the least doubt or difficulty, in order to prevent breakage of thread in the
case of sewing machines through wrong motion of the shuttle, and 3° To render the
apparatus simpler and cheaper than others. In carrying out my invention, I make a
treadle preferably of iron cast in one piece and consisting of a short shaft fixed
underneath the machine bed or table so as to oscillate freely to and fro and to each
end of which hangs a vertical shaft.; one of these should be: in a central position
between the standards and long enough to hold a foot step near to the ground while
the other will reach to about the centre of the crank to which it is connected by
means of a rod arranged to communicate the power transmitted to the treadle by
the swinging or other motion of the operator's leg with the knee as centre. I then
fix to the end of the connecting rod joining the crank, one end of a tension spring
while the other is connected above somewhere about the nearest end of the
horizontal shaft, the result will be to bring that end of the rod, and with it the
crank, into the position when the spring is in least tension and the treadle half way
between its extreme limits or dead centres. It is then easy by always pushing it
one way or the other with the foot, (right or left,) to preserve the same direction
of rotary motion. A weight may be attached to the crank wheel to enforce the
object of the invention.
זה
1001 in London
:
COMPLETE SPECIFICATION.
Improvements in Mechanism for Driving Sewing and other
Machines by Foot Power.
I NICOLAS ALPHONSE AUBERTIN, Practical Chemist of 3 Mornington Place
Hampstead Road N.W. in the County of London, 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:
My invention consists in improvements in mechanism for driving sewing and
other machines and relates to a swinging treadle for this purpose by the employ-
ment of which the dead centres are overcome, thus enabling the heaviest machine
to be worked with ease.
And in order that my said invention may be understood I will now proceed to

page_text: describe the same with reference to the drawings accompanying this Specification
in which
Fig. 1 shews a front elevation of my improved treadle adapted to the table of
a sewing machine for instance. Fig. 2 shews an end view of the same.
Fig. 3 section of foot plate and lower part of treadle.
The same letters denote the same parts in all the views.
a shews the table of the machine. 66 bearings between which works the shaft c
(supported by the centres 6' 6') this I propose to form in one casting with the
vertical rods di. e shews foot plate supported by two balls f which take in cups g
formed in the casting c. The foot plate is secured by the screw / which is not
tightened up so as to permit of the foot plate oscillating. To the lower end of
the rod 1 pivot a link k, this latter has a slotted hole so as to pass over the
crank m for this crank to work in. n is a spiral spring fixed at one end to the
link kat o and at the other end to the vertical rod i at p.
The action of mechanism constructed as above is as follows :-
Supposing the mechanism to be in the position shewn at Fig. 2 when the foot is
placed on the foot plate and pushed in the direction of the arrows flight it will
turn the fly wheel in the direction shewn by the arrow on this wheel, so long as
'the leg is kept swinging the fly wheel will be kept in action with little or no
exertion on the part of the operator, the spring n carrying the crank over the dead
centres as will be easily understood on reference to the drawing.
This mechanism is easily worked by swinging one leg only, from the knee.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed I declare that what I
claim is
(1) In mechanism for working sewing and other machines the combination of
the rocking or swinging treadle with the link or rod k, rod i and spring n all
arranged and operated substantially as set forth.
(2) The improvements in mechanism for working sewing and other machines
substantially as set forth.
Santamaan■EYUn
BROWNE & Co.,
9 Warwick Court, Gray's Inn, London, W.C., Agents for the Applicant.