Automatic Regulator for Pneumatic Flues Page: 2 of 3
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CHARLES B. CAFFEY, OF BASTROP, TEXAS
AUTOMATIC REGULATOR FOR PNEUMATIC FLUES.
3PEC FICA . ION forming part of Letters Patent No. 674,958, dated May 28, 1901.
Application filed October 15, 1900. Serial No, 33,155, (No model.)
To all whluoin, U' 7may co7e7%n-
Be it known that I, CHARLES B. CAFFEY, a
citizen of the United States, residing at Bas-
trop, in the county of Bastrop and State of
5 Texas, have invented a new and useful Au-
tomatic Regulator for Pneumatic Flues, of
which the following is a specification.
My invention is an improved automatic
regulator for pneumatic flues, adapted to au-
io tomatically regulate the strength of the air-
current passing through the flue; and it con-
sists in the peculiar construction and combi-
iation of devices hereinafter fully set forth,
and pointed out in the claims.
15 My invention may be used on a pneumatic
conveyer-flue such as is used to convey seed
or lint cotton from a cotton-gin; and my in-
vention is adapted to be used in connection
with a pneumatic flue of any description in
20 which it may be desirable or necessary to reg-
ulate the strength of the air current or blast
passing through the flue.
In the accompanying drawings, Figure 1is
a perspective view of a pneumatic flue pro-
25 vided with an automatic regulator construct-
ed in accordance with my invention. Fig. 2
is a vertical longitudinal sectional view of the
The main trunk or section 1 of the pneu-
30 matic flue is provided on one side (here shown
as the upper side) with an elbow or branch
flue 2, which is disposed at an appropriate
angle with relation to the main flue. The
outer end of the branch flue 2 is provided
35 with a valve 3, which is adapted to close the
same, and is provided with an arm 4, that pro-
jects from its pivoted or hinged side. An ad-
justing-yoke 5 is pivoted on the branch flue
2, as at 6, said adjusting-yoke having the
40 arms 7, which are astride of said flue 2, and
being provided at its outer side with a han-
die 8. The flue 2 has a segment-rack 9 on
one side, which is engaged by a spring-pressed
pivoted locking-dog 10, with which the yoke
45 5 is provided. Springs 11 connect the arms
7 of the adjusting-yoke with the valve 3 and
serve to normally close the said valve, the
tension of the spiings 11 being regulated by
the adjusting-yoke, as will be understood.
0o On the rear side of the branch flue 2, in
guides 12, with which the same is provided,
is a cut-off valve 13, which operates in an
opening 14 in the upper side of a main trunk
1 of the pneumatic flue and is adapted to bc
extended into the main trunk of the flue as 55
far as may be necessary in order to divert a
portion of the an blast of current passing
through the main lie 1 and cause the excess
to be discharged through the branch flue 2
past the valve 3. The said valve 13 is con- 6o
nected to the arm 4 of valve 3 by a link 15.
The said link is pivotally attached to the
valve 13, as at 16, and is pivotally attached
to the arm 4 of valve 3 by a pin 173 and said
link is provided with a series of adjusting- 65
openings for said pin, said adjusting-open-
ings being designated by the reference-nu-
meral 18 and adapted foi so adjusting the
valve 13 with reference to the arm 4 as to
cause the said valve to be normally extend- 70
ed into the flue 1 as far as may be desirable.
It will he understood that upon an abnor-
mal increase of the pressure of the current
or blast passing through the flue 1 the valve
3 will open, by reason of the pressure on its 75
under side, to permit the escape of the excess
volume of air, and that as the valve 3 opens,
the valve 13, which is automatically operated
thereby, will be moved partially across the
flue 1, so as to intercept the current or blast 8o
of air therein, the said valves 3 and 13 co-
acting to automatically relieve the flue 1 of
excess pressure. By adjusting the valve 13
with relation to the valve 3 and by regulat-
ing the tension of the springs 11 my auto- 85
matic regulator may be so adjusted as to
cause the pressure in the flue 1 to be relieved
when the same exceeds any degree desired.
Having thus described my invention, I
1. A pneumatic flue having a branch or el-
bow, an automatic pressure-relieving valve
thereon, and a cut-oil valve in said pneumatic
flue connected to and operated by said pres-
sure -relieving valve, substantially as de- 95
2. A pneumatic flue having a pressure-dis-
charge branch or elbow, an automatic pres-
sure-relieving valve therein, a cut-off valve
in said pneumatic flue and means to connect ioo
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Caffey, Charles B. Automatic Regulator for Pneumatic Flues, patent, May 28, 1901; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth510631/m1/2/: accessed January 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.