IMPROVEMENTS APPLICABLE TO DRIVING SMALL MACHINES."
Year: 1876

page_text: LETTERS PATENT to Joseph Brunt, of Derby, in the County of Derby, for the
Invention of "IMPROVEMENTS APPLICABLE TO DRIVING SMALL MACHINES."
PROVISIONAL SPECIFICATION left by the said Joseph Brunt at the Office of
the Commissioners of Patents on the 21st September 1876.
JOSEPH BRUNT, of Derby, in the County of Derby.
TO DRIVING SMALL MACHINES."
IMPROVEMENTS APPLICABLE
This Invention has for its object improved driving arrangements for machines,
same being specially applicable to sewing machines.
In order that my Invention may be more readily understood I will describe the
same as when used for sewing machines, the application of my Invention to other
machines being strictly analogous. The ordinary hand-sewing machines as at
present must be either attached or fitted to a suitable table, to admit of its being
worked by treadle or else worked by hand; but according to my arrangements the
machine need not be fitted as at present.
In carrying out my Invention the machine, say, is required to be driven by band
and pulley. The machine is placed at or near the edge of a table or other suitable
article; the driving wheel carrying the band is attached to suitable framing, said
framing being attached or clamped by screws to the edge of the table; to the
driving wheel is attached a rod which is secured to the treadle, said rod being so
arranged as that the arrangements may be adjusted to any height of table or other
article of furniture. It will be seen that when a band machine is required to be
driven by these arrangements all that is required is to attach the framing to the
table, the band from the driving wheel passing over a groove on the driving wheel
of the machine and the rod attached to the driving wheel is adjusted so as to bring
the treadle in proper position.
In order to prevent the driving wheel of the treadle from revolving in a contrary
direction, thereby causing the machine which is being driven by it to break its

page_text: thread, together with other defects, I adopt the following arrangements :-The
driving wheel is recessed out in front of the central boss to the depth and width of
say, 1/8 of an inch or thereabouts, the wheel first being bored to its proper size.
The stud upon which the wheel revolves is filled up only to the bottom of the recess,
thus forming a level inside; in this recess is a key in which is a hole, the shape of
the key being conical on one side of the hole and semicircular on the other; this
key is held in its place by being screwed on to the stud, the key being in a hole
drilled out of the centre of the stud giving to the key when the wheel is revolving
an eccentric motion, by the distance being less the nearer the key gets to the
left side.
The conical point of the key is kept continually pressing slightly on the side of
the recess by a spring which is let into the stud and fixed so as to press upon the
key at the top; thus, as the wheel by the action of the foot tends to go backward
it is instantly arrested by the key wedging itself on the side of the recess, which is
narrow, taking the screw as the point of measurement; by a slight pressure of the
foot on the treadle or of the hand either on the treadle driving wheel or machine
wheel it will at once revolve in its proper direction. The central boss is covered in
with a cap, to prevent the dust from getting to the internal parts.
This Invention is applicable to the driving wheels of all sewing-machine treadles
and machinery requiring a motion in one direction only.
It is evident that my Invention, although specially useful for sewing machines, is
applicable to other machines.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Brunt in the Great Seal Patent Office on the 21st March
1877.
JOSEPH BRUNT, of Derby, in the County of Derby. "IMPROVEMENTS APPLICABLE
TO DRIVING SMALL MACHINES."
This Invention has for its object improved driving arrangements for machines,
same being specially applicable to sewing machines.
In order that my Invention may be more readily understood I will describe the
same as when used for sewing machines (the application of my Invention to other
machines being strictly analogous). The ordinary hand-sewing machine as at
present must be either attached or fitted to a suitable table, to admit of its being
worked by treadle or else worked by hand. But according to my arrangements the
machine need not be fitted as at present.
In carrying out my Invention the machine, say, is required to be driven by band
and pulley. The machine is placed at or near the edge of a table or other suitable
article; the driving wheel carrying the band is attached to suitable framing, said
framing being attached or clamped by scrows to the edge of a table; to the
driving wheel is attached a rod which is secured to the treadle, said rod being so
arranged that the arrangements may be adjusted to any height of table or other
article of furniture. It will be seen that when a machine is required to be driven
by these arrangements all that is required is to attach the framing to the table,
the band from the driving wheel passing over a groove on the driving wheel of the
machine and the rod attached to the driving wheel being adjusted so as to bring the
treadle in proper position.
In order to prevent the driving wheel of the treadle from revolving in a contrary
direction (thereby causing the machine which is being driven by it to break its
thread, together with other defects) I adopt the following arrangements:-The
driving wheel is recessed out in front of the central boss to the depth and width of,
say one-eighth of an inch or thereabouts, the wheel first being bored to its proper size.

page_text: The stud upon which the wheel revolves is filled up only to the bottom of the recess,
thus forming a level inside; in this recess is a key in which is a hole, the shape of
the key being conical on one side of the hole and semicircular on the other; this
key is held in its place by being screwed on to the stud, the key being in a hole
drilled out of the centre of the stud giving to the key when the wheel is revolving
an eccentric motion, by the distance being less the nearer the key gets to the
left side.
The conical point of the key is kept continually pressing slightly on the side of
the recess by a spring which is let into the stud and fixed so as to press upon the
key at the top; thus, as the wheel by the action of the foot tends to go backward
it is instantly arrested by the key wodging itself on the side of the recess, which is
narrow, taking the screw as the point of measurement; by a slight pressure of the
foot on the treadle or of the hand either on the treadle driving wheel or machine
wheel it will at once revolve in its proper direction. The central boss is covered in
with a cap to prevent the dust from getting to the internal parts.
This Invention is applicable to the driving wheels of all sewing-machine treadles
and requiring motion in one direction only.
It is evident that my Invention although specially useful for sewing machines is
applicable to other machines.
Having thus far described the nature of the said Invention, and incidentally
intimated in what manner the same is to be performed, I will now proceed (aided
by the accompanying Drawings) to further and particularly describe and ascertain
in what manner the same is to be performed or carried out in practice, that is to
say,-
DESCRIPTION OF THE DRAWINGS.
Fig. 1 represents in elevation my improved driving arrangements; Fig. 2, end eleva-
tion. In these Figures A is the table or article of furniture on which is placed at or
near the edge the sewing or other machine; B, driving wheel, furnished with driving
band B attached, free to revolve, to the framing C, said framing terminating by
clamps D so formed as to overlap the edge of the table. These clamps are furnished
with screws E which are screwed up tight against the under side of the article of
furniture when the arrangements are required to be attached thereto. F, rod
attached by screw f to the driving wheel B, the other end being secured to treadle G.
The rod F is furnished with holes or openings fl, so as to allow of the arrange-
ments being adjusted to any height of the article of furniture to which they are
attached.
Fig. 3 shows the central boss of the driving wheel with the arrangements for
preventing the said wheel revolving in the contrary direction; Fig. 4, section
through central boss. In these Figures (3 and 4) the central boss a of driving
wheel is recessed out in front, as shewn, the stud or centre b on which the wheel
revolves being formed so as to come flush with the said recess in the boss. c is the
key which is placed in the said recess, said key being furnished with a hole, on one
side of which the key is conical and semicircular on the other, as shewn in Fig. 3.
The key is held in its place by being screwed to the stud by scrow (d); the conical
point of the key, as shewn, is kept pressing slightly on the side of the recess by the
spring (e), which is let into the stud and fixed so as to press upon the key at the top.
It will thus be seen that as the wheel B (by the action of the foot) tends to go
backward it is arrested by the key c wedging itself on the side of the recess.
central boss is covered with a cap e, as shewn in Figures 1, 2, and 4. The sewing
machine is placed at or near the edge of the table or other article of furniture, the
grooved wheel of the machine being so placed as to admit the driving pulley passing
over same.
The
Having now particularly described and ascertained the nature and object of the
said Invention, and in what manner the same is to be performed or carried out in
practice, I hereby declare that I claim the Invention of "Improvements applicable
to Driving Small Machines," substantially as the same is herein-before set forth and

page_text: described, comprising the treadle arrangements adaptable to such machines, sub-
stantially of the character hercin-before set forth and described.
In witness whereof, I, the said Joseph Brunt, have hereunto set my hand and
seal, this Twentieth day of March, in the year of our Lord One thousand
eight hundred and seventy-seven.
Witness,
SAMUEL HALL,
4, Curzon Street,
Derby,
Accountant.
JOSEPH BRUNT. (L.S.)