Improvement in Steam-Engines. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
UNITED STATES PATENT OFFICE.
WILLIAM H. GARLOCK AND RICHARD COOKE, OF DENISON, TEXAS.
IMPROVEMENT IN STEAM-ENGINES.
Specification forming part of Letters Patent No. 217,O8 , dated July 1, 1879; application filed
April 1, 1879.To all wihoa it may concern:
Beit known that we, WILLIAMI H. GARLOK
and RIcHARD Coor, of Denison, in the county
of Grayson and State of Texas, have invent-
ed a new and valuable Improvement in Self-
Working" Steam-Engines; and we do hereby
declare that the following is a fall, clear, and
exact description of the construction and op-
eration of the same, reference being had to the
annexed drawings, making a part of this
specification, and to the letters and figures of
reference marked thereon.
Figure 1 of the drawings is a representation
of a vertical longitudinal section of this inven-
tion. Fig. 2 is a side view of the valve and
rod. Figs. 3, 4, and 5 are details.
This invention has relation to improvements
in steam-engines.
The objctof the invention is to devise means
whereby the valves may be actuated automati-
cally without the employment of exterior mech-
anisms by the use of exhaust-steam.
The nature of the invention consists in the
combination, with a cylinder having steam-
passages and partial-exhaust passages of small
size in its wall, and a steam-chest having di-
verging exhaust-passages, of a valve in said
chest, having two spaced heads provided with
extensions or rings, each of the said rings be-
ing provided with a main and a partial - ex-
haust port, working in connection with the ex-
h anst-passages of the chest, and with two ports
working in connection with the steam-passages
and partial-exhaust passages of the cylinder,
as will be hereinafter fully explained.
In the annexed drawings, the letter A des-
ignates an ordinary steam-cylinder, having a
piston, B, and piston-rod B', working through
a stufling-box, a, in one of the cylinder-heads.
C represents a valve-box, usually at the top
of the cylinder, and generally made in two see-
tions, Lb b', joined together by flanges and bolts.
The section b is cast with the cylinder, and the
box is closed at each end by means of heads
c. In the top wall of the cylinder are formed
the steam-passages d d',in line with each other,
and opening into the cylinder close to its heads
at one end, and into the valve-box C at each
side of the middle of the length of said cylin-
der.
o e' indicate smaller passages, arranged inthe said wall, one at each side of the passages
d d', and opening into the cylinder independ-
ently thereof. The passages e e' extend from
opposite directions past the middle of the
length of the cylinder, and open into the valve-
box near to, but outside of, the passages d d'.
The top wall of the box is provided with two
converging ducts, ff', having an educt-open-
ing, c', common to both, and leading into the
box in line, or nearly so,with the steam-passages
d d'. The object of these passages will be fully
explained hereinafter.
1) indicates the valve mechanism, consist-
ing essentially of a shaft, g, extending axially
through the box, with one end passing through
a stuffing - box, h, and supported by a guide,
4', outside thereof, provided with two spaced
heads, 1 l', provided each with a cylindrical
hollow extension or flange, it, in which are
formed on one side the ports i i', and on the
other side the portsj andj'. The portsj sup-
ply the main steam-passages d d', and the ports
j' the partial-exhaust passages e e', the relative
positions of the said ports being the same as
that of the openings of the passages aforesaid.
The extent of movement of the valve is con-
trolled by means of a shoulder, z, on the valve-
rod g, and. if desired, a stop or collar on the
said rod outside of the chest; or we may depend
upon the abutting of the inner end of the said
rod against the contiguous head of the chest.
The operation of our improved engine is as
follows, reference being especially had to Fig.
1 of the drawings: Steam is let into the chest
through an opening, o, in its wall between the
heads of the valve, and passes through passage
d', the valve-head l' being clear of the opening
thereof, into the steam-cylinder, forcing the pis-
ton in the direction indicated by the arrow. It
beingpremised that thepiston has already made
a stroke, and that there is steam on both sides
thereof, steam is exhausted from the other end
of the cylinder through passage 4, and passes
therefrom into the contiguous end of the chest
through the port j of the ring n of head 1,
whence it escapes into the main exhaust-pas-
sage f through the port i of the said head. A
portion of the exhaust-steam passes through
the partial - exhaust passage e and port j' of
head 1' into the opposite end of the chest, and
by its pressure forces the valve away from this
Upcoming Pages
Here’s what’s next.
Search Inside
This patent can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Patent.
Garlock, William H. & Cooke, Richard. Improvement in Steam-Engines., patent, July 1, 1879; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth169851/m1/2/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.