Viscoscometer. Page: 8 of 10
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1,187,000
ble shaft 31 extending through the wall of
the tank 1 and the inner end of this shaft
carries a propelling or impeller wheel 32
having inclined vanes. This wheel 32 is
5 immersed in the liquid in the tank and as it
rotates creates a current therein which keeps
the fluid constantly circulating around the
heating coils.
One of the connecting wires 9 is connected
10 with the motor through the conducting wire
33, and leading from the motor is a con-
ducting wire 34 which connects with the
lead wire 27, and when a circuit is com-
pleted through the heating coils, simultane-
15 ously and by this same means a current is
completed through the motor, setting it in
motion. The two circuits are broken at the
same time, so that the motor is in operation
only when the heating coils are energized.
20 Switches 35 and 36 are provided for the
purpose of manually breaking the circuit
through the motor and the heating coils, re-
spectively.
When the device is in use, it is pro-
25 vided with an electric signal bell 37 of the
usual and well 4 nown construction. The
battery 38 is provided for operating the
bell and two current-conducting wires 39
and 40 are connected with the battery, the
30 former of which is connected with the bell
mechanism and also with the plate 10 and
the latter of which carries a contact point
41 alined above the contact point 13. When
the fluid in the tank 1 rises above its normal
35 temperature, the thermostat 17 operates
through the rod 18 to lift the lever 12, caus-
ing contact between the points 13 and 41
and a circuit is completed from the battery
38 through the bell mechanism, causing the
40 bell to ring. Warning is thus given that the
heating fluid is becoming too hot.
The arrangement just described is desir-
able when a temperature of about one hun-
dred degrees F. is to be employed in testing
45 the viscosity of the liquids, and where al-
ternating current is not available.
In Fig. 11 I have shown a modified form
of the device wherein the wiring for an al-
ternating current is employed for heating
50 the heating coils 6, and wherein the direct-
current-conducting wires are indicated by
the numerals 7', 7', which lead from suitable
batteries (not shown), and are connected to
the binding posts 8', 8', from which lead
55 the current-conducting wires 9', 9'. The al-
ternating current wires are indicated by the
numerals 42, 42, connected to the binding
posts 43, 43, from which lead the current-
conducting wires 44, 44. One of the wires
60 44 is connected with the heating coils 6 and
from the heating coils leads the conducting
wire 27', which is connected to the arma-
ture 21', operating in connection with the
solenoid 19', in the same manner as the ar-
65 mature 21, heretofore described. The arma-a
ture 21' has a rod 23' extending from its
free end, said rod having the contact point
24' arranged to make a contact with the con-
tact point 29' with which the other of said
conducting wires 44 is connected, and thus 70
a circuit is completed through the heating
coils when the solenoid 19' is energized.
The solenoid 19' is energized when the heat-
ing fluid falls below its normal temperature
and contact is made between the points 13 75
and 14, through the conducting wires 9', 9',
as hereinbefore described.
In the form of device shown in Fig. 11 an
additional relay is provided consisting of
the solenoid 45 and the armature 46, the free 80
end of said armature having a rod 47 ex-
tending therefrom carrying the contact
points 48 and 49, the latter of which is in-
sulated from the rod 47, said contact points
being arranged to contact respectively with 85
the contact points 50 and 51, connected with
one of the wires 9'. In this form of the de-
vice, shown in Fig. 11, a complete circuit is
at all times formed through the motor 30
by means of the conducting wires 9', 9' and 90
the conducting wire 52, one of said wires 9'
leading directly to said motor and the other
being connected with the motor through
said wire 52. This circuit causes the motor
to run at low speed at all times. When a 95
contact is made between the points 13 and
14 when the temperature of the oil in the
tank falls, the solenoid 45 is energized by
reason of a circuit being completed from
one of said wires 9' through said solenoid ioo
to the other of said wires 9'. This circuit
is completed from one of the wires 9',
through the wire 54, the lever 12 and the
wires 55 and 56 to the other wire 9', and
when said solenoid 45 is energized the arma- 105
ture 46 is attracted toward the same, caus-
ing the points 48 and 50 and the points 49
and 51, respectively, to contact, and an addi-
tional circuit is completed through one of
the wires 9' through the wire 57, connected 110
with the contact point 49 and. through the
motor 30 to the other of said wires 9', and
an additional current is thus sent through
the motor 30 causing it to run at high speed
when the points 13 and 14 are in contact and 115
the heating coils energized. At the same
time the relay 45 is energized and contact
is made at the contacts 48, 50, current passes
to the solenoid 19', by one of the wires 9',
by way of the armature 46, bar 47, contacts 12
48, 50, wire 50', through the solenoid 19',
and the other wire 9'. This serves to at-
tract the armature 21', closing the heater
circuit at contacts 24', 29', and causing al-
ternatiig current to heat the heaters to raise i
the temperature of the oil in the tank.
I prefer to employ the arrangement shown
in Fig. 11 wherever alternating current is
available, and whenever the temperature is
to be kept high, say 210 F., under which i3o
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Reference the current page of this Patent.
Lorenz, Charles O. Viscoscometer., patent, June 13, 1916; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth859855/m1/8/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.