Improved Means for Cooling Motor Cylinders.
Year: 1899

page_text: [Communicated from abroad by PHILIBERT BOURDIAUX, of 103, Rue Saint Maur,
Paris, France, Mechanician.]
Improved Means for Cooling Motor Cylinders.
I, REGINALD WALTER BARKER; Vulcan House, 56, Ludgate Hill, London, E.U.,
Patent Agent, do hereby declare the nature of this invention to be as follows:-
This invention refers to improvements in means for cooling the cylinders of
motor engines. The difficulties connected with the cooling of the working cylin-
ders of high speed motors are well known. These difficulties are especially
noticeable in connection with the cylinders of explosion motors employed for
automotor carriages, but they also occur in other high speed engines of a similar
kind. To obviate these difficulties the external surface of the cylinder has some-
times been provided with a series of flanges or wings exposed to cooling surfaces,
but this method has been attended with many disadvantages arising from the
unequal expansion and contraction of the metal in the cylinder and that of the
flanges or wings. The object of the present invention is to provide a means by
which the said difficulties may be avoided, and yet close contact with the cylin-
der ensured, and the certain removal of the objectionable heat from the body of
the cylinder to the larger surfaces of the flanges or wings, thus effecting a con-
siderable and continuous cooling of the parts of the motor.
In order to carry out this invention I provide on the outside surface of the
cylinder a continuous spiral fillet, similar to a screw thread, the pitch of which
is very fine and the depth of the thread or fillet rather deep. I provide a number
of annular metal plates of a wide and thin section, having an exterior diameter
of convenient size, and the internal diameter exactly corresponding to the bottom
of the screw thread formed by the spiral fillet aforesaid.
At a spot on the rim of the central opening of the flange or wing plate is a
radial incision, two lips being thus formed one of which is folded over or raised
above the other to a height corresponding to the thickness of the spiral screw or
fillet aforesaid. In this manner the flange or winged plate may be threaded on
and fastened to the cylinder and as many such flanges may be similarly attached
as may be desired. The thickness of the metal forming the wings and the sec-
tion of the interior rim must exactly correspond to the form and size of the
spiral groove formed by the spiral thread or fillet around the cylinder.
flanges or wings and the cylinder may be of any kind of metal, and the fillet or
thread of any form. The wings or flanges may be curved, flat or otherwise, and
may vary in number and proportions, but it is absolutely necessary that the
interior rim of the wings shall exactly fit and be in close contact with the sides
of the spiral groove formed by the fillet or thread on the cylinder.
Dated this 16th day of December 1899.
The

page_text: I, REGINALD WALTER BARKER, Vulcan House, 56, Ludgate Hill, London, E.C.,
Patent Agent, 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 refers to improvements in means for cooling the cylinders of
motor engines. The difficulties connected with the cooling of the working cylin-
ders of high speed motors are well known. These difficulties are especially
noticeable in connection with the cylinders of explosion motors employed for
automotor carriages, but they also occur in other high speed engines of a similar
kind. To obviate these difficulties the external surface of the cylinder has some-
times been provided with a series of flanges or wings exposed to cooling surfaces,
but this method has been attended with many disadvantages arising from the
unequal expansion and contraction of the metal in the cylinder and that of the
flanges or wings. The object of the present invention is to provide a means by
which the said difficulties may be avoided, and yet close contact with the cylin-
der ensured, and the certain removal of the objectionable heat from the body of
the cylinder to the larger surfaces of the flanges or wings, thus effecting a con-
siderable and continuous cooling of the parts of the motor.
In order to carry out this invention I provide on the outside surface of the
cylinder a continuous spiral fillet, similar to a screw thread, the pitch of which
is very fine and the depth of the thread or fillet rather deep. I provide a number
of annular metal plates of a wide and thin section, having an exterior diameter
of convenient size, and the internal diameter exactly corresponding to the bottom
of the screw thread formed by the spiral fillet aforesaid.
At a spot on the rim of the central opening of the flange or wing plate is a
radial incision, two lips being thus formed one of which is folded over or raised
above the other to a height corresponding to the thickness of the spiral screw or
tillet aforesaid. In this manner the Hauge or winged plate may be threaded on
and fastened to the cylinder and as many such flanges may be similarly attached
as may be desired. The thickness of the metal forming the wings and the sec-
tion of the interior rim must exactly correspond to the form and size of the
spiral groove formed by the spiral thread or fillet around the cylinder. The
flanges or wings and the cylinder may be of any kind of metal, and the fillet or
thread of any form. The wings or flanges may be curved, flat or otherwise, and
may vary in number and proportions, but it is absolutely necessary that the
interior rim of the wings shall exactly fit and be in close contact with the sides
of the spiral groove formed by the fillet or thread on the cylinder.
In order that this invention may be readily understood, reference is made to
the accompanying drawings in which Fig. 1 represents a partial vertical section
of a cylinder furnished with the aforesaid wings. Fig. 2 is a sectional plan of
one of the wings and Fig. 3 is a sectional elevation along the line X Y in Fig. 1.
The same letters refer to the same parts in the several figures, a being the body
of the cylinder on the sides of which are fillets e in the form of a spiral screw, the
cutting being rather deep and the pitch very low. bare the wings formed of
wide, thin, open circular metal pieces, the interior diameters of which are the
same as that of the bottom of the aforesaid screw threads on the cylinder.
At a spot or position on the rim of the central opening of each wing is a radial
incision or recess d, so shaped that two lips e and f are formed, of which the one e
is folded over or raised above the other f to a height corresponding to that of the

page_text: thread of the spiral screw on the cylinder. In this manner each wing b may be
screwed and fastened on to the cylinder, as may the desired number of wings in
the same way.
The thickness of the metal forming the wings and the outline or section of
their interior rims must correspond exactly with the size and form of the spiral
groove of the threaded cylinder. The wings and the cylinder may be made of any
kind of metal and the fillet or thread on said cylinder of any form. The wings
may be curved, flat or otherwise, and may vary in number and proportions, but
it is absolutely necessary that the interior rim of the wings shall be in close con-
tact with the sides of the spiral groove or screw of the threaded cylinder.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
In cylinders for motor engines, the provision of a continuous spiral fillet, on the
external surface of said cylinders, said fillet being similar to a screw thread, the
pitch of which is very fine, and the depth of said fillet or thread being rather
deep; the provision of a series of wide thin circular metallic pieces screwed on to
said fillets and closely fitting the same, and forming wings for the purpose of
cooling the metal of the cylinder, substantially as and the the purpose herein set
forth and described and illustrated by the accompanying drawings.
Dated this 3rd day of September 1900.
REGINALD W. BARKER.