Valve-Closure for Ventilators Page: 2 of 3
[3], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATESPATENT OFFICE.
WILLIAM L. HAMILTON AND GEORGE MgcVLLOUGH, OF AUSTIN, TEXAS,
VALVE-CLOSURE FOR VENTILATORS.Specification of Letters Patent. Patented Aug. 13, 1918.
Application filed December 20, 1917. Serial No. 208,017.To all whom it may concern:
Be it. known thttwe, WILLTAM L. HAMIL-
TON and GEORGE MCCULLOUGH, both citizens
of the United States, residing at Austin, in
5 the county of Travis, State of Texas, have
invented a new and useful Valve-Closure for
Ventilators; and. we do hereby declare the
following to be a full, clear, and exact de-
scription of the invention, such as will en-
10 able others skilled in the art to which it ap-
pertains to make and use the same.
The present invention relates to a valved
ventilating cap for plumbing systems, . and
has for its object to provide a device of
15 this character which can be readily fitted
upon the upper end of a ventilating pipe,
and which embodies novel features of con-
struction for normally closing the same, al-
though allowing an ingress of air when such
20 becomes necessary for flushing purposes,
thereby preventing the atmosphere around
the house from becoming contaminated by
the escape of deadly sewer gases from the
open end of the ventilating pipe.
25 Further objects of the invention - are to
provide a valved ventilating cap of this
character which is comparatively simple and
inexpensive in its construction, which can be
readily fitted in position, which will prevent..
30 the escape of poisonous gases without inter-
fering in any manner with the ingress of
fresh air into the pipe when such is neces-
sary, and which can be adjusted to operate
in the most effective manner under all con-
35 editions.
With these and other objects in view, the
invention consists in certain novel combina-
tions and arrangements of the parts as will
more fully appear as the description pro-
40 ceeds, the novel features thereof being point-
ed out in the appended claims.
For a full understanding of the inven-
tion, reference is to be had to the following
description and accompanying drawings, in
45 which:-
Figure 1 is a side elevation of a plumbing
system provided with a valved ventilating
cap constructed in accordance with the in-
vention, portions being broken away and
50 shown in section.
Fig. 2 is an enlarged vertical sectional
view through the valved ventilating cap and
the upper end of the ventilating pipe.
Fig. 3 is a top plan view of the ventilat-
55 ing cap.
Fig. 4 is a horizontal sectional viewthrough the ventilating cap on the line
4-4 of Fig. 2.
Corresponding and like parts are referred
to in the following description and indicated 60
in all the views of the drawings by the same
reference characters.
Referring to the drawings, the numeral
1 designates a conventional, ventilating pipe
which extends upwardly on the outside of 65
the building A and terminates at a point
above the roof a thereof. This ventilating
pipe forms a continuation of the plumbing
pipe 2 which leads downwardly to the un-
derground sewer 3, said plumbing pipe 2 70
being-connected by the usual pipes 4 and 5
to the bath room fixture 6.
The ventilating cap 7 is shown as having
the lower end thereof internally threaded
at 7a for engagement with an externally 75
threaded collar 8. which is fitted on the
upper end of the ventilating pipe 1. A
cross bar 9 extends diametrically across the
collar 8 at the top thereof and is seated
within notches 10 in the upper end of the 80
pipe. 1, thereby locking the collar against.
rotation. A guide pin 11 projects upwardly
from the middle of the cross bar 10, being
shown as having the lower end thereof
thr-eaded for engagement with a nut 12, said 85
pin passing through the cross bar which is
rigidly clamped between the said nut 12 and
the head of the pin. A sleeve 13 telescopes
upon the guide pin 11, being mounted to
slide freely thereon, said sleeve being pend- 90
ent from and rigidly secured to a valve
plate 14 which normally engages the top of
the cap 7 and closes ventilating openings
15 therein. A coil spring 16 surrounds the
guide sleeve 13 and pin 11, being interposed 95
between the cross bar 9 and the valve plate
14, and normally holding the latter yield-
ably in a closed position. Under normal
conditions this. valve plate will close the
openings 15 and prevent the escape of gases 100
from the ventilating pipe, although any suc-
tion caused by the formation of a partial
vacuum within the ventilating system will
cause the valve plate to open downwardly
against the action of the spring 16 and per- 105
mit the ingress of air into the ventilating
pipe. The ventilating pipe thus serves all
of its useful functions, although the escape
of sewer gases is prevented. By adjusting
the cap 7 on the collar 8 the tension of the 110
spring 16 can be regulated, thereby enabling
the device to be adjusted in such a manner1,275,557.
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Hamilton, William L. & McCullough, George. Valve-Closure for Ventilators, patent, December 20, 1917; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256802/m1/2/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.