Motor For Fluid-Meters. Page: 3 of 4
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
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a
drawn through the division marks on the
horizontal line L, and intersecting lines M
are drawn. The curve is found by joining
the points of intersection of the lines M and
5 E'. In order to avoid having a sharp angle
at the points O-P, a curve is substituted
which will permit the end of the vane to
pass over it readily.
Referring now to Fig. 1, it will be seen
10 that the vane is provided with rounded ends
249, these ends being in engagement with
the internal wall 5Y of the casing 5. The
construction is such that with the cylinder
or drum D mounted to rotate about the
15 point T and the vane 24 arranged to slide
radially with respect to the point T, the
ends of -the vane will always be in contact
with the walls of the meter no matter what
position the vane may be in.
20 The drum D is in contact with the end of
the partition 17 on one side and is rotatably
mounted in the partition 14 and the cover 7,
as shown. It is provided with a bottom lug
25 which extends into the recess 16 and
25 which is engaged by a bearing screw 26.
The opposite end of the drum is provided
with a hub portion 237 to which is secured
a gear 27. This gear 27 is connected with a
reducing train which in the present instance
30 consists of the gears 28, 29 and 30, the lat-
ter being secured to a stem 31 which is cen-
tered within a bore in the gear 27. The stem
31 passes through a stuffing box 32 and may
be connected to any suitable registering
35 mechanism, the particular construction of
which forms no part of the present inven-
tion.
From the foregoing description of the
various parts of the device, the operation
40 thereof will be readily understood.
The fluid passes in at the inlet 13 and
then through the screen 12, see Fig. 3, up-
wardly through the passage 18 and into the
chamber 33 in the upper part of the meter.
45 The pressure of the fluid on the vane 24
rotates the drum D and the rotation of the
drum will cause the reciprocation of the
vane 24, this reciprocation being accom-
plished with very little friction owing to the
50 construction of the drum. The ends of the
vane being in constant contact with the walls
of the meter and the surface of the drum D
being in close contact with the partition 17,
the fluid in order to reach the.outlet 19 must
55 push the vane completely around. The
fluid will escape through the passage 19 and
thence through the outlet 34 see Fig. 1.
The number of turns of the drum may be
registered by the turning of the stem 31 and
60 hence the quantity of fluid delivered.
It will be observed that no matter what
position the vane 24 is in its line of contact
with the wall of the meter is the same be-
cause of the fact that the surface is rounded.For this reason, no shoe is necessary at the es
ends of the vane. Where such a shoe is
used, it is almost impossible to prevent
escape of the fluid around the ends since the
pivoting of the shoe will permit the escape
of fluid especially where such fluid is in a 70
very tenuous condition, as for instance in
measuring gas.
In the manufacture of the device the mak-
ing of. the drum in separate parts insures
the accuracy of the instrument. It may be 75
stated that the parts are bolted together and
then the drum is turned in a lathe to insure
absolute accuracy.
By constructing the inner walls of the
meter in the manner described, I provide so
walls having a contour which is mathemati-
cally exact so that there is no binding of the
vane as would be the case where such exact-
ness is not followed out.
I claim:- 85
1. In a meter, a casing, a cylindrical drum
rotatably disposed within the casing, said
drum consisting of a pair of semi-cylindrical
members each having a recess, the recesses
of each part being in registration, and ends 90
each provided with a recess arranged to
register with said first named recesses to
form a diametrical slot through the drum, a
vane arranged to reciprocate through the
slot, the ends of said vane being rounded, 95
said drum being in engagement with the
wall of the meter on one side of the drum,
and the cross section of the engaging wall
of the meter being substantially heart-
shaped. 100
2. In a meter, a casing having an interior
wall substantially heart-shaped in cross sec-
tion, a drum rotatably mounted within the
casing, said drum comprising a pair of semi-
cylindrical members secured together and 105
being provided with registering recesses on
their engaging faces, a bottom portion se-
cured to said semi-cylindrical members and
having a groove arranged to register with
said recesses, a top portion secured to said 110
semi-cylindrical members and having a
groove arranged to register with said re-
cesses, said bottom and said top being pro-
vided with sealing means on their outer sur-
faces, the ends of said drum being disposed 115
in contact with stationary parts of the.cas-
ing, and a reciprocating vane extending
through the slot in the drum formed by the
registering recesses, said vane being in con-
stant engagement at both its ends with the 120
wall of the casing.
3. In a meter, a cylindrical casing, a par-
tition extending inwardly from one wall of
the meter toward the center, said casing
having an interior wall heart-shaped in 125
cross section, a portion of the wall having
branches curved inwardly and terminating
at the end of the partition thereby providing
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Bradley, Richard C. & Ireland, C. Frank. Motor For Fluid-Meters., patent, February 5, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257837/m1/3/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.