IMPROVE- MENTS IN MEANS OR APPARATUS TO BE EMPLOYED TO SEWING MACHINES AND TO OTHER MACHINES WHEREIN CAMS OR CAM SURFACES ARE EMPLOYED WORKING IN CONNECTION WITH TRUCKS OR ROLLERS, BY MEANS OF WHICH THEY ARE IN WORKING RENDERED COMPARATIVELY NOISELESS
Year: 1867

page_text: LETTERS PATENT to William John Cunningham, of New Oxford Street,
in the County of Middlesex, Engineer, for the Invention of "IMPROVE-
MENTS IN MEANS OR APPARATUS TO BE EMPLOYED TO SEWING MACHINES AND
TO OTHER MACHINES WHEREIN CAMS OR CAM SURFACES ARE EMPLOYED WORKING
IN CONNECTION WITH TRUCKS OR ROLLERS, BY MEANS OF WHICH THEY ARE
IN WORKING RENDERED COMPARATIVELY NOISELESS."
Sealed the 18th March 1868, and dated the 16th September. 1867.
PROVISIONAL SPECIFICATION left by the said William John Cunningham
at the Office of the Commissioners of Patents, with his Petition, on the
16th September 1867.
I, WILLIAM JOHN CUNNINGHAM, of New Oxford Street, in the County of
Middlesex, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MEANS OR APPARATUS TO BE EMPLOYED TO SEWING MACHINES,.
AND TO OTHER MACHINES WHEREIN CAMS OR CAM SURFACES ARE EMPLOYED WORKING
IN CONNECTION WITH TRUCKS OR ROLLERS, BY MEANS OF WHICH THEY ARE IN
WORKING RENDERED COMPARITIVELY NOISELESS," to be as follows:-
This Invention has for its object improvements in means or apparatus to,
be employed to sewing machines and to other machines wherein cams or

page_text: cam surfaces are employed working in connection with trucks or rollers, and
consists of coating or covering the pin.or axis upon which the truck or roller
works with vulcanized india-rubber or some other suitable yielding substance
or material; this I prefer to do by employing a small tube of vulcanized
india-rubber or other suitable material, slidden on to the pin or axis of the
truck or roller; over this I place a,metal cylinder, outside which I place
another cylinder composed by preference of vulcanite, this last or outer
cylinder works against the cam or cam surface in a similar manner to that
in which the ordinary solid metal truck or roller works. By these means
the noise usually caused by the working of such parts of sewing machines and
other machines in which cams and cam surfaces are employed is almost
entirely obviated.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
:
by the said William John Cunningham in the Great Seal Patent Office
on the 16th March 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
JOHN CUNNINGHAM, of New Oxford Street, in the County of Middlesex,
Engineer, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing. date the Sixteenth day of September, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William John Cunningham, Her special licence that I, the said
William John Cunningham, my executors, administrators, and assigns, or
such others as I, the said William John Cunningham, my executors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN MEANS OR APPARATUS TO BE EMPLOYED
TO SEWING MACHINES AND TO OTHER MACHINES WHEREIN CAMS OR CAM SURFACES
ARE EMPLOYED WORKING IN CONNECTION WITH TRUCKS OR ROLLERS, BY MEANS OF
WHICH THEY ARE IN WORKING BENDERED COMPARATIVELY NOISELESS," upon the
condition (amongst others) that I, the said William John Cunningham, my

page_text: executors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said William John Cunningham, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings annexed,
and to the figures and letters marked thereon:-
This Invention has for its object improvements in means or apparatus to be
employed to sewing machines and to other machines wherein cams or cam
surfaces are employed working in connection' with trucks or rollers.
Figure 1 is a vertical section and Figure 2 is a horizontal section of a truck
or roller having my improvements applied thereto.
a is the pin or axis, which may be carried by the end of a lever, as shown,
or it may be carried by any suitable part of a machine. This pin or axis a I
coat or cover with vulcanised india-rubber or with other suitable yielding
substance or material, and for this purpose I have found it convenient to
employ a tube 6 of vulcanised india-rubber which may be readily slidden on to
the pin or axis a of the truck or roller; over this tube 6 of vulcanized india-
rubber or other suitable flexible material I place a cylinder c of metal or other
suitable rigid material, outside which I place another cylinder d also composed
of metal, vulcanite, or other suitable rigid material; this last or outer cylinder
d works against the cam or cam surface in a similar manner to that in which
the ordinary solid metal truck or roller works. The tubes or cylinders b and
c are stationary upon the pin or axis a, whilst the outer cylinder or roller d
turns upon the cylinder c. The various parts of the compound, truck or roller
are retained in position between the two discs e, e, or by other suitable means.
By these means the noise usually caused by the working of such parts in
sewing machines and other machines in which cams and cam surfaces are
employed is almost entirely obviated, whilst the wear and tear are consider-
ably reduced.
Having thus described the nature of my said Invention, and the best mode I
am acquainted with for carrying the same into effect, I would have it understood
that I do not confine myself to the precise details herein shewn and described,
as such may be varied without departing from the peculiar character of my

page_text: Invention; but what I do claim is the improvements substantially as herein
shewn and described.
In witness whereof, I, the said William John Cunningham, have here-
unto set my hand and seal, this. Sixteenth day of March, in the year
of our Lord One thousand eight hundred and sixty-eight.
W. J. CUNNINGHAM. (L.S.)
Witness,
FRED. HARRIS,
Patent Agent,
35, Southampton Buildings.