IMPROVEMENTS IN CENTRIFUGAL MACHINES.
Year: 1874

page_text: LETTERS PATENT to Saint John Vincent Day, of 166, Buchanan
Street, Glasgow, in the County of Lanark, North Britain, Consulting
Engineer, for the Invention of "IMPROVEMENTS IN CENTRIFUGAL
MACHINES. "_A communication from abroad by David McColley
Weston, of Boston, Massachusetts, United States of America.
ealed the 28th July 1874, and dated the 3rd March 1874.
PROVISIONAL SPECIFICATION left by the said Saint John Vincent'
Day at the Office of the Commissioners of Patents, with his
Petition, on the 3rd March 1874.
I, SAINT JOHN VINCENT DAY, of 166, Buchanan Street, Glasgow, in
the County of Lanark, North Britain, Consulting Engineer, do hereby
declare the nature of the said Invention of "IMPROVEMENTS IN CENTRIFUGAL
MACHINES," to be as follows, that is to say :-
.3
This Invention which relates to an improved arrangement and con-
struction of centrifugal machines belongs to that class of those machines.
which are supported and driven from below.
i

page_text: The bearing of the machine is elastic and carried in a framing having
arms formed thereon for attaching it to the support. The lower part of
the spindle is provided with a driving pulley and brake for stopping it
when required. The basket is surrounded by a curb or outer casing in
which one or more metallic vanes or deflectors are fixed for the purpose
of directing the air set in motion by the basket against itself, and
thereby steadying the machine.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Saint John Vincent Day in the Great Scal Patent
Office on the 2nd September 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAINT
JOHN VINCENT DAY, of 166, Buchanan St., Glasgow, in the County
of Lanark, North Britain, Consulting Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria by Her
Letters Patent, bearing date the Third day of March, in the year of
our Lord One thousand eight hundred and seventy-four, in the 37th
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Saint John Vincent Day, Her special license that
I, the said Saint John Vincent Day, my executors, administrators, and
assigns, or such others as I, the said Saint John Vincent Day, my
executors, administrators, or 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
CENTRIFUGAL MACHINES," the same being a communication to him from
abroad by David McColley Weston, of Boston, Massachusetts, United
States of America, upon the condition (amongst others) that I, the said
Saint John Vincent Day, by an instrument in writing under my hand
and scal, should particularly describe and ascertain the nature of tho
said Invention, and in what manner the same was to be performed, and

page_text: and 4 are respectively an elevation and plan of the machine. As shewn
on these Figures the revolving basket A is fixed upon the
end of
upper
a vertical shaft B, the lower end of which is carried in a step or socket C.
The lower end of the shaft B bears upon antifriction plates or "cods"
interposed between it and the bottom of the recess in the socket C.
The length of the shaft B from d its neutral axis to e its upper end it
_ is preferred should not be less than one and one quarter times the
diameter of the basket A, but it may be of greater length. Upon the
upper part of the socket C a cup or vessel c is formed which is charged
with oil. The socket C is provided with oil holes and canals, by which
the oil from the vessel c reaches and lubricates the bearing of the
shaft B. The casting D (which is fixed to the shaft B by one or more
pinching pins h, by keys or otherwise) has its lower part a formed as a
driving pulley, whilst its upper part 6 serves as a brake pulley, whereby
the rotation of the machine is arrested when desired by the application
of the brake E.. A recess formed in the centre of the framing F is filled
by an elastic ring G, upon which the socket C is hung. A similar
elastic ring H fills a similar recess in the, lower part of the framing F,
in which position it is held by a washer and jamb nuts I screwed upon
the outside of the step or socket C. The framing F has arms formed
upon it by which it is secured by bolts J, to cross timbers K attached to
the flooring joists. The curb or outer casing L of the machine is carried
on a stand M fixed to the flooring. The bottom of the outer casing L'is
provided with an opening N to allow the escape of the liquids expelled
by the centrifugal action through the perforated circumference of the
revolving basket A. One or more metallic vanes or deflectors ○ (one
only being shewn on the Drawings) are fixed to and set at an angle
from the interior periphery of the curb or outer casing L, as shewn at
Figure 2, by which the current of air set in motion by the rotation of the
basket A, as indicated by the arrows, is directed against itself, that is to
say, against the circumference of the basket A, which is thereby steadied
while revolving.
Having now described and particularly ascertained the nature of the
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would
observe in conclusion that what I consider to be novel and original and
therefore claim as the Invention secured to me by the herein-before
in part recited Letters Patent is,-
j

page_text: First. A centrifugal machine with an elastic bearing supported and
driven from below, and in which the length of the shaft B is preferably
not less than one and one-quarter times the diameter of the basket A.
Second. One or more vanes or deflectors O applied to the interior of
the casing of centrifugal machines supported and driven from below, as
and for the purposes herein-before set forth.
Third. The placing of the driving pulley of centrifugal machines.
supported in an elastic bearing and driven from below, upon the driving
shaft on the plane of the neutral axis of the bearing upon which the
shaft oscillates as herein-before described and shewn.
In witness whereof, I, the said Saint John Vincent Day, have here-
unto set my hand and seal, this Twenty-fourth day of August,
One thousand eight hundred and seventy-four..
ST. JOHN VINCENT DAY. (L.S.)