IMPROVEMENTS IN SLIDE VALVES AND MEANS FOR LESSENING FRICTION BETWEEN SUCH VALVES AND THEIR SEATS
Year: 1883

page_text: LETTERS PATENT to Alfred Julius Boult of 323 High Holborn in the county
of Middlesex Engineer for an Invention of "IMPROVEMENTS IN SLIDE VALVES
AND MEANS FOR LESSENING FRICTION BETWEEN SUCH VALVES AND THEIR
SEATS a communication from Warren Tyler Reaser and Christian Roman
Stein both of Madison Dane County Wisconsin United States of America
"
PROVISIONAL SPECIFICATION left by the said Alfred Julius Boult at the
Office of the Commissioners of Patents on the 13th March 1883.
ALFRED JULIUS BOULT of 323 High Holborn in the county of Middlesex
Engineer, "IMPROVEMENTS IN SLIDE VALVES AND MEANS FOR LESSENING
FRICTION BETWEEN SUCH VALVES AND THEIR SEATS" [a communication from
Warren Tyler Reaser and Christian Roman Stein both of Madison Dane County
Wisconsin United States of America]
This invention relates to certain new and useful-improvements in means
especially designed for lessening or removing the friction between a slide valve and
its seat resulting from the downward pressure upon such valves of steam or other
fluids or to produce a more perfect and complete "balanced slide valve
"
In carrying out our invention we provide vibrating supports for the slide valve
or valves provided at their upper ends with vibrating bearings, Upon the latter
rest horizontal plates connected by cross bars secured to vertical supports that
project from the valve or valves.
The vibrating valve supports are arranged on opposite sides of the valve or
valves and are connected at their upper end by cross bars provided with toothed
segments that mesh with the teeth of a rack bar which latter may serve for
operating the valve or valves. The lower bearings of the vibrating supports have
toothed segments which also mesh with rack bars that are adjustable vertically
for raising and lowering the valves. The toothed segments and toothed bars
always insure a uniform movement or working of the valve or valves, while
retaining it or them in proper position relative to the valve seat or seats. By
having the segmental or rocking bearings at the upper and lower ends of the

page_text: vibrating valve supports the valve or valves work much easier as the bearings
move along with and carry the valve or valves thus requiring less power, while
lessening to a great extent friction between slide valves and their supports.
The upper segmental bearings of the vibrating supports may also be cut from
a circle of about three times the diameter of the circle from which the lower
bearings are cut so that the upper and lower bearings are nearer on a perpendicular,
when the valve or valves are removed to their extreme throw in either direction
while the upper bearings travel three times the distance the lower bearings travel,
with less friction and wear on the gearing mechanism thereby moving much easier,
requiring less power while lessening to a greater extent the friction and consequent
wear between slide valves and their seats, than where the upper and lower segmental
bearings are cut from the same circle and this is more effectually accomplished
when four vibrating supports are used in connection with double valved steam
engines, the segmental or rocking bearings supporting the valve or valves in such
manner that lubricating of the valve seat or seats is not required.
The segmental or rocking bearings are secured in position by plates having their
inner ends curved and projecting over the lower segments the outer plates being
rigidly secured in position while the inner plates are secured by screws passing
through oblong slots so that said inner plates can be properly adjusted to and from
the segments by loosening up said screws.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Julius Boult in the Great Seal Patent Office on the
5th September 1883.
ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Engineer IMPROVEMENTS IN SLIDE VALVES AND MEANS FOR LESSENING
FRICTION BETWEEN SUCH VALVES AND THEIR SEATS a communication to me
from abroad by Warren Tyler Reaser and Christian Roman Stein both of
Madison Dane County, Wisconsin, United States of Amèrica
This invention relates to certain new and useful improvements in means
especially designed for lessening or removing the friction between a slide valve and
its seat resulting from the downward pressure upon such valves of steam or other
fluids or to produce a more perfect and complete "balanced slide-valve" and to
this end the invention consists in novel features of construction and combination
and arrangement of parts all as will be hereinafter fully described and set forth in
the claims hereto annexed.
Referring to the accompanying drawings.-Figure 1 represents a side elevation ;
Figure 2 a longitudinal vertical central section; Figure 3 a central cross section;
Figure 4 represents a longitudinal vertical central section of the improvements as
applied to the class of steam engines employing double valves, Figures 5 and 6
enlarged detail views to be hereinafter referred to. Figure 7 is an elevation of the
steam cylinder, the valve rod box being shown in section; Figure a section
showing means for securing the vibrating supports in position. In the drawings
A-represents the steam cylinder, B the steam chest, C the valve seat or seats and
D the slide valve or valves of a steam engine, E E represent vibrating supports for
carrying the valve or valves, which supports are provided at their upper and lower
ends with segmental or rocking bearings e e¹. Upon the bearings é rest horizontal
plates FF connected by a cross bar or bars f secured to vertical support or
supports D¹ projecting from the top of the valve or valves D all as clearly shown
in Figures 1 and 4. The bearing supports. E E are arranged on opposite
sides of the valve or valves D and connected near their upper ends by cross
bars c.
These cross bars c are provided with toothed segments which mesh
with the cog-teeth g on the longitudinal bar or rod G secured to the cross bar or
bars and which bar or rod G may form the means for operating the valve or
valves, The lower bearings e¹ e' are provided on their outer sides with toothed
segments H H which mesh with the toothed bars h h secured to the. horizontal
plates I I, that are adapted to be vertically adjusted by liners for raising or
lowering the valve or valves. The toothed segments and toothed bars always
insure a uniform movement or working of the valve or valves while retaining it or
them in proper position relative to the valve seat or seats. By having the
segmental or rocking bearings at the upper and lower ends of the vibrating valve
supports, the valve or valves work much easier as the bearings move along with
and carry the valve or valves, thus requiring less power, while lessening to a great
extent, friction between slide-valves and their seats
In Figures 4, 5, 6 and 8 the upper segmental or rocking bearings e are cut from
a circle of about three times the diameter of the circle from which the lower
bearings e¹ are cut so that the upper and lower bearings are nearer on a perpendi-
cular, when the valve or valves are removed to their extreme throw in either
direction while the upper bearings travel three times the distance the lower
bearings travel, with less friction and wear on the gearing mechanism thereby
moving much easier requiring less power while lessening to a greater extent the

page_text: friction and consequent wear between slide valves and their seats, than where
the upper and lower segmental bearings are cut from the same circle and this is
more effectually accomplished when four vibrating supports are used in connection
with double valved steam engines as shown in Figure 4, the segmental or rocking
bearings supporting the valve or valves in such manner that lubricating of the
valve seat or seats is not required.
The segmental or rocking bearings are secured in position by the plates J J¹
having their inner ends curved and projecting over the lower segments e³, the outer
plates J, being rigidly secured in position while the inner plates J are secured in
position by screws j passing through oblong slots 7 so that said plates J¹ can be
properly adjusted to and from the segments e¹ by loosening up said screws, all as
clearly shown in Figure 8,
Having thus fully described the invention what I claim as new and desire to
secure by letters patent is :-
1st The combination with a slide valve and its seat, of vibrating supports having.
segmental or rocking bearings at their upper and lower ends, arranged outside of
and on opposite sides of the valve and adapted to move along with it, substantially
as herein shown and described,
2nd The combination with a slide valve and its seat of vibrating supports having
segmental or rocking bearings at their upper and lower ends, the upper bearings e
being cut from a circle of larger diameter than the lower bearings e¹ substantially
as and for the purposes herein shown and described.
+
3rd The combination with the sliding valves and valve seats of double valved
engines and means for connecting the valves, of vibrating supports having
segmental or rocking bearings arranged in pairs substantially as and for the
purposes herein shown and described.
4th The combination with a slide valve and its seat of vibrating supports
having segmental or rocking bearings at their upper and lower ends, and the
adjustable supporting plates I I substantially as and for the purposes herein
shown and described,
5th The combination with a slide valve and its seat, of vibrating supports having
segmental or rocking bearings at their upper and lower ends, and toothed
segments HH connected thereto, and the toothed bars h h substantially as and for
the purposes herein shown and described.
6th The combination with a slide valve and its seat, of vibrating supports
having segmental or rocking bearings at their upper and lower ends, toothed
segments H H connected thereto, toothed bars h h, cross bars c c having toothed
segments g¹ g¹ and toothed bar G substantially as and for the purposes herein
shown and described.
7th The combination with a slide valve and its seat, of vibrating supports having
segmental or rocking bearings, of the plates J J¹ for securing them in position
substantially as herein shown and described.
In witness whereof I the said Alfred Julius Boult have hereunto set my hand
and seal this twenty first day of August in the year of our Lord, One thousand
Eight hundred and Eighty three
ALFRED J. BOULT
(L.S.)