AN IMPROVED MOTOR FOR SEWING AND OTHER MACHINES BAR SUSIMA AMOND Mrves
Year: 1875

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co, Patent Agents, Southampton Buildings, London, for
the Invention of "AN IMPROVED MOTOR FOR SEWING AND OTHER
MACHINES." A communication from abroad by George Washington
Manson, of Washington, District of Columbia, United States of
America, Machinist.
Sealed the 23rd December 1875, and dated the 6th November 1875.
COMPLETE SPECIFICATION filed by the said William Robert Lake at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 6th November 1875, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,.
Southampton Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED
Miaman BAR SUSIMA
AMOND MIGHrves" and have netitioned Her Majesty

page_text: belt wheel. The depression or elevation of the handle of this governor
will apply or release the acting shoe, and thereby control or stop the
motion of the machine, and this may either be effected by foot or by
hand; so efficient is this governor that the machine can be stopped
almost in an instant when at a high speed; and by my new method of
controlling the power of the spring, the speed can be kept high or
regulated to suit the work.
A single treadle movement may be desirable for some kinds of
mechanism, and I have shown this application with my 'Invention; in
such event a ratchet and pawl are employed to retain the power, but the
double-acting treadle frame is preferred as being more advantageous and
effective.

page_text: '
the spring or springs E, the inner end of which is secured to the shaft,
which winds it so that the recoil of the spring drives the drum and the
latter the mechanism by suitable gearing, consisting in the example
shewn of a spur wheel F gearing with a pinion G on a short shaft H
supported in a suitable bearing sleeve I of the supplemental frame;
through this short shaft the power is transmitted to the needle carrier or
other device by a suitably arranged spur wheel a and pinion 6, the latter
being on the shaft of the belt and fly wheels, which shaft is supported
in bearings in the main and supplemental frames. A supplemental
*bracket c may support the inner end of the bearing sleeve, or the drum
may be moved up close to the frame A, and thus leave the bearing
"sleeve I short, so that the bracket c may be dispensed with.
The main frame is braced by a base cross rod J, to which also the
treadle support is fixed. The shaft C has ratchets d, d, formed or
secured thereon, and into these ratchets the spring pawls e are fitted to
operate. These pawls are carried by levers K which swing freely upon
the winding shaft, and the pawls are kept in contact with the ratchets
by a spring fattached to the levers, so that the downward pull of the
levers winds the spring.
The spring pawls are pivoted to the levers and are provided with a
rubber cushion r, Figure 5, near the pivot of the pawl to receive the
movement of the pawl and prevent its acting point from clicking in
passing over the ratchet teeth, and thus avoid noise while winding up
the spring.
The pawl levers are of suitable length and are connected at their free
ends by rods L with the treadle frame M, carrying a right and left
treadle N equally disposed between a pivot support P, which has its
bearing in a bracket Q secured to the cross rod J of the main frame and
resting upon the floor, so that the feet of the operator press the foot
rests N upon each side of the centre pivot bearing. By this construction
the pawl levers are kept in position for instant action to wind the spring
when the feet are applied to the treadle, and in this way a double
winding action is obtained, and the spring may be maintained at its
maximum power or at intermediate degrees by operating the treadles
now and then. The lower ends of the connecting rods L are united to
the treadle frame M by pivoted screw-threaded sockets R, R, by which I
obtain a compensating action for the rods, and allow them to be adjusted
to give the pawl levers the proper movement.

page_text: 5
The treadle pads are provided with rubber cushions 9, 9, and these
coming in contact with the floor prevent noise from the treadles and
injury to carpets; these cushions also serve as stops to limit the descent
of one and the ascent of the other treadle.
The force of the spring being maintained, a friction brake is applied
for action upon the grooved belt wheel S, the bearing point T of which
brake is carried upon the lower branch U of a bell-crank lever pivoted
to the main frame at V, and with its handle end W passing up in a
convenient position beneath the table to be operated by the hand to
O control the motion of the machine.
The handle of the lever passes through a slotted plate h, and is in
contact with a plate spring i, the action of which holds the lever up
when the brake is released. To stop the machine the handle is pressed
down, and by giving a sharp pressure a high speed can be almost
instantly checked and the bearing end released by raising the lever, but
a gentle pressure may be kept on the brake by the side bearing of the
spring, or any suitable device may be employed for this purpose. The
balance wheel X is upon the short shaft of the belt wheel, and the
belt Y leads to a pulley Z on a shaft above, but any suitable means
may be adopted for transmitting the power to the machine to be
driven.
In adapting this Invention for use with a single treadle, as shown in
Figure 7, only one connecting rod L and pawl lever K are employed, and
the treadle N is mounted directly upon the base cross rod J with the
connecting rod attached to the rear end of said treadle, so as to wind up
the motor by the heel and toe pressure. In this case I hold the main
shaft from turning back by a ratchet wheel j, into which a pawl k takes
and is held by a spring m♪
A modified cushion device to prevent noise of the ratchets is shown in
Figures 9 and 10, a groove being formed in the ratchets to receive a
rubber band, upon which the point of the spring pawl strikes as the
ratchet is turned.
The to-and-fro movement of the single treadle is limited by stops n, o,
Figure 11, on the cross rod, and it is always kept in position to operate
the pawl lever by a spring p, which raises the heel of the treadle when
the foot pressure is removed..

page_text: Seventh. The combination with the spring pawl e and its carrying
lever K of the rubber cushion r, as and for the purpose described.
Eighth. The combination with the treadle frame M of the rubber
cushion stops 9, 9, as and for the purpose described.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Sixth day of November, in
the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
JA'. EDWARDS,
8, Southampton Buildings,
London.
WM. ROBT. LAKE. (L.S.)