Year: 1887

page_text: Date of Application, 24th Jan., 1887.
Complete Left, 14th Mar., 1887.
Complete Accepted, 15th Apr., 1887
We, DAVID JONES, of 24^, Arthur Street, Gloucester, Machinist, and JAMES
GODSELL, of the Brewery, Stroud, Brewer, both in the County of Gloucester,
do hereby declare the nature of this invention to be as follows :-
This invention relates to an improved treadle motion for sewing machines, and
consists in replacing the ordinary rocking treadle, working on an axis under the
small of the foot, by a pair of treadles carried on the respective pins of a pair
of cranks.
The power is taken from the crank shaft to the first motion shaft of the sewing
machine by means of chain-gearing and grooved pulleys.
The advantages of the invention are derived from the change of the action of the
user's feet, and the abolition of bands of leather or similar material.
Users of the ordinary treadle are familiar with the fatigue which the peculiar motion
of the usual rocking-treadle inflicts upon the muscles of the feet and legs. By the
use of this present invention the muscular power of the legs is brought to bear upon
the throws of the crank so as to allow of its full effect being utilised in a natural way,
the result being that the task of working a machine is considerably lightened and
acheing limbs altogether prevented.
The bearings in which the pulleys aforesaid work are adjustable independently of
each other, and as the endless metal chains used in place of the usual driving bands
will not stretch with wear, it follows that the first adjustment of the said bearings is
the only one required during their life.
1007
PHILLIPS & LEIGH,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improved Means for Driving Sewing Machines.
I, DAVID JONES, of 24ª, Arthur Street, Gloucester, and JAMES GODSELL, of the
Brewery, Stroud, Brewer, both in the County of Gloucester, 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 relates to an improved treadle motion for sewing machines, and
consists in replacing the ordinary rocking treadle, working on an axis under the small
of the foot, by a pair of treadles carried on the respective pins of a pair of cranks.
The power is taken from the crank shaft to the first motion shaft of the sewing
machine by means of chain gearing and grooved pulleys.
The advantages of the invention are derived from the change of the action of the
user's feet and the abolition of bands of leather or similar material.
Users of the ordinary treadle are familiar with the fatigue which the peculiar motion
of the usual rocking-treadle inflicts upon the muscles of the feet and legs. By the
use of this present invention the muscular power of the legs is brought to bear upon
the throws of the crank so as to allow of its full effect being utilised in a natural way,
the result being that the task of working a machine is considerably lightened and
acheing limbs altogether prevented.
The bearings in which the pulleys aforesaid work are adjustable independently of
each other; and as the endless metal chains used in place of the usual driving bands
will not stretch with wear, it follows that the first adjustment of the said bearings is
the only one required during their life.
We attain the objects of our invention by means of the mechanical arrangements
illustrated in the accompanying drawing which is to be taken as part of this
specification and read therewith, and in which
Fig. 1 is an end sectional elevation taken on the lino A-B of Fig. 2, and
Fig. 2, a front elevation.
A is the crank shaft; a, a, the two throws; and a², a², the rocking treadles on the
pins of said throws, each one equi-distant from the axis of the crank shaft. The
bearings a³ of the latter are adjustable vertically in any convenient and suitable
way; eg, by making them capable of sliding in grooves in the machine standards
and furnishing proper locking devices for fixing them permanently after adjustment.
B is the grooved driving pulley tight on the crank shaft.
(is an intermediate shaft carried in bearings c, conveniently fixed to the frame of
the machine, in which it is adjustable laterally.
Two grooved speed pulleys D and E are fast upon this intermediate shaft, the former
driven by the metallic chain band d passing round it and the pulley B, and the latter
driving the pulley F on the first motion shaft of the sewing machine proper, by a
second metallic chain band e.
We prefer to use the pattern chain known as chandelier chain, although other
patterns may be used provided that the links will not open under a longitudinal strain.

page_text: The two pulleys B and D may be of equal diameters as shewn in the figures, and
the required increase of speed on the part of the pulley F be obtained by an adjustment
of the relative diameters of it and the pulley E; or, if necessary, this adjustment may
be extended to the pulley D.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare what we claim is :-
1. The combination with the standards of a sewing machine, of a two-throw crank,
rocking treadles on the pins of the throws, and bearings for the said crank formed in
or on the said standards, substantially as described with reference to the accompanying
figures.
2. The combination with the standards of a sewing machine, of a two-throw crank
rotatable in vertically adjustable bearings in or on said standards, a driving pulley
fast on said shaft, and a chain passing round the said driving pulley and a second one
on an intermediate shaft, substantially as described with reference to the accompanying
figures.
PHILLIPS & LEIGH,
Patent Agents,
22, Southampton Buildings,
Chancery Lane, W.C.,
Agents for the Applicants.