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Патент USA US2412907

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Dec. 17, 1946.
2,412,907
W. A. PENNOW
CONTROL SYSTEM AND APPARATUS FOR LAMPS
Filed April 29., 1943
2 Sheets-Sheet 1.
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Dec. 17, 1946.
w- A- PENNQW
2,412,907 '
CONTROL SYSTEM AND APPARATUS FOR LAMPS .
Filed'April 29, 1945
'2 Sheets-Sheet 2
I WITNESSES:
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INVENTOR
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Patented Dec. 17, ‘1946
‘2,412,907
UNITED STATES PATENT OFFICE’;
CONTROL SYSTEM AND APPARATUS
FOR LAMPS
'Willis A. Pennow, Cleveland, Ohio, assignor to
Westinghouse Electric Corporation, ‘East Pittse
‘burgh, Pa., a corporation of Pennsylvania
Application April 29, 1943, 'Serial N0.‘ 485,021
13 Claims. (Cl. 315—-116)
2
.My invention relates, generally, to control sys
tems and apparatus for electric lamps and, more
particularly, to a controlsystem and cooling ap
tus is so interlocked with the circulating system
that the lamp can be energized only when the
cooling liquid is within its proper operating tem
perature range and the proper ?ow maintained
and which shall function at all times to prevent
paratus embodied‘in a self-contained control and
cooling unit particularlyadapted for use with
electric lamps of the type which arecooled by
circulating a cooling medium therethrough dur
ing operation.
‘
the cooling liquid from freezing,
.
Another object ‘of my invention is to provide
-
a controller of the character described in which
Heretofore, attempts have :been made to uti
water‘may be used as the cooling mediumiwithout
lizethe high. e?iciencies and-great light flux con l0 danger of freezing and which does not require a
centrations of such lamps, of which the water
separate or outside source of water supply.
‘ '
cooled high intensity mercury vapor lamp is one
These and other important objects and princi
example, .in search-lights and the like, but such
ples of my invention will become more apparent
attempts have v‘not been entirely successful as
from the ‘following detailed description of one
large and cumbersome auxiliary equipment has
.beenrequired and, in inostinstances, it has been
necessary to use a separate water supply for cool
ing purposes.
15
embodiment thereof when read'in ‘conjunction
with the. drawings in which:
A
Figure .1 is a side elevational view of a’ con
troller embodying the principal features of my
invention, certain parts being broken away and
to usesuch lighting apparatus in the open and 20 others shown in section to illustrate details, and
.In' many instances it is necessary or desirable
.under all weather conditions.
Attempts to use
cooling liquidsvhavin‘g low, freezing points have
Fig. 2 is a diagrammatic view of the electrical
circuits and apparatus and the circulating sys
' not met with success iorthe reason that such
tem of the controller-0f Figl showing ‘its ‘co
liquids undergo chemical changes, due to the high
operative relationship with the lamp.
_
short-wave emissions of such light ,sources of 25 My invention ‘will be described asit may be
lamps, and either‘ depositsolids on the lamp and
applied to a light unit in the form of‘ a search
cooling jackets thus greatly reducing the light
light projector suitable for use in determining
output, or decompose to such extent that .the
ceiling heights for ‘airports although it is ‘tobe
freezing point is raised to a point where protec
understoodthat its use is not so limited. In this
tion (against freezing is‘no longer a?orded.
Accordingly, .it is an object of my invention,
30 instance, the projector is mounted on the con
troller to provide a unitary ‘assembly ready for.
generally stated, to provide apparatus for con
connection to a current source.
,
'
.trolling and cooling a liquid cooled lamp», orvthe
Referring to Fig. 1. of the drawings, the con
like, which shall be of simple and-economical
troller isrindicated ‘generally by the numeral 80
construction, and which shall-function to auto 35 and the searchlight or projectorby‘l l. The con
matically control the energization of the lamp in
troller comprises a housing or casing 12 of weath
accordance'with the temperature .of the‘coolin‘g
erproof construction-having a front door l3 which
liquid and also maintain the cooling liquid within
may be secured‘ to the housing-by means of hinges
‘a proper range of operating temperatures regard
(not shown) and fastening devices I4.
less of, the'weather conditions to which it is sub 40 A labyrinthradiator .i5 is :attachedto the‘back
.jeeted.
'
wall ‘:16 ‘of the housing. and functions. therewith
_A more speci?c object ‘of-Amy invention is to
provide a self-contained control and cooling con
to provide v'a reservoir for the cooling liquid,
which is hereinafter referred to ‘as the reservoir
troller unit for usewith liquid-cooled lamps.
radiator. ' As shown in Fig. 1, the labyrinth struc
Another object’ of ‘my invention is to, provide 45 ture "is ‘formed by‘ the transverse members ll‘
a self-contained controller unit forliquid-cooled
.produce'a transverse flow ‘1 off the ,gcooling
lamps embodying the necessary electrical vcontrol
liquid while‘heat radiation‘is from vertical sur
apparatus for controllingthe energization of the
faces. The radiator I5 may also be provided with
--1arnp andlzaclosed circulating system including a
a plurality of spaced vertical‘ ?ns l8 on the face
‘reservoir-radiator compartment provided - with 50
heating 'means to maintain the temperature of
The projector H comprisesiabody'or drum 2|
thereof.
‘the cooling ‘liquid above the freezing . point.
,Afurther objector-the invention ‘is to provide
A
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mounted on the housing l2 by means of ja‘tubu
larconnector‘ 22, andmlprovided with a hinged
liarself-contained controller unit of the character
door '23, including azlens 24, attachedr‘to the
described‘whereintheelectrieal control appara 55 drum by means of a hingeIZS ‘and a plurality of
2,412,907
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spaced clamps 26. A main re?ector 21 is mount
and makes possible the operation of the lamp
ed at the bottom of the drum.
and other devices.
The start and stop switches 55 and 56 are for
the purpose of manually controlling the opera
tion of the lamp 28 and are accessible through
'
The liquid-cooled lamp 28 of the type having
a water jacket 28a, is mounted within the drum
in sockets 29 and 30 supported by the metal
tubes 3| and 32 forming a part of the circulat
ing system. These tubes function to carry the
cooling liquid as well as electric conductors for
the energizing circuit of the lamp. The lamp
the dooropening of the housing,
The lamp 28 is energized from conductors 69
and 16 through a step-up transformer ‘H hav
ing its secondary winding 12 connected to the
parts of the circulating system'within'the hous
the lower ends of the tubes as shown.
'
‘and relays of the system are energized from these
conductorsinresponse to the operation of the
start switch 55.
and tube‘assembly is supported by means of a
spider 33 carried by an adjusting screw 34 ro
tatably mounted on a boss 35 on the winding
of the connector 22.
The tubes 3| and 32 arefconnected to the other
ing by ?exible tubes 36 and 31 and are connect
ed to the control circuits and apparatus within
the housing by conductors 38 and 39 attached to
n,
When the main switch 54 is'c‘losed; the main
conductors '69 and 10 of the controller are ener
gized. The lamp 28 and the various switches
lamp‘ terminals and its primary winding 13 con
' nected to conductors 69 and 10 through contact
members 58a of the control switch 58.
In‘ order to assure that the proper ?ow of cool
‘ '
In this instance, the projector is also provided 20 ing liquid is circulating through the lamp before
it is energized, the '?ow ‘switch is connected in
the circulating system as shown, and is provid
holder“ attached to a bracket 43 mounted on
ed with contact members 60a'which. must be
the socket 29.
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closed beforethe control switch 58 can be ener
‘ ‘A door switch 44 is provided as a part of the
‘control circuit and connected therewith through 25 gized to connect the primary winding 73 of the
transformer to the energized conductors 69
a conductor cable 45.
y
with a secondary reflector 4| supported by‘ a
-' Referring again- to the controller In, the cir
The electric immersion heater 53 referred to
culating system' also includes a motor-operated
in connection with Fig. 1 is controlled by the
circulating pump 46 comprising, a motor 4'! and
pump 48, mounted within the housing I2 and 30 thermal switch 63 which functions to energize
and
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connected in the circulating system as shown in
I Fig. 1. vThe intake port 49 of the pump is con
-the heater when the temperature of the cooling
liquid decreases below a- predetermined value.
nected to the bottom of the radiator-reservoir
The energizing circuit‘ for theheater extends
through" the normally closed contact members
51a of the control relay '5‘! and, therefore, it is
through a suitable nipple 5| so as to draw cool
ing liquid from the lower part of the radiator
reservoir while the outlet port 52 is connected to
‘the lower end of the ?exible tube 31 so that the
‘cooling liquid is circulated up through the metal
tube 32, through the jacket of the lamp, down
through the other metal tube 3| and through
'the'?exible tube 36 into the top of the radiator
‘through another control device which will be de
scribed hereinafter in connection with Fig. 2.
,In order‘to provide for maintaining the tem
‘perature of the cooling liquid above a predeter
"mi'rie'd. minimu'm’value, or above freezing tem
perature, the controller is‘ also provided with
an'electric immersion heater 53 which may be
mounted on the back wall l6 of the housing and
extending‘ into the radiator-reservoir as shown
in- Fig. ‘1.
The electrical connections’ of this
heater will be described hereinafter with refer
ence toFig.2.
'
"
Referring to Fig: 2 of thedrawings, there is
“shown a diagrammatic view ‘of they control cir
apparent that this circuit may be- completed at
any time this relay is in its normal deenergized
position.
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' The thermal switch 64 functions in response
40
to the temperature of-the cooling-liquid'exceed
ing a predetermined value to energize auxiliary
relay 62 through the contact’ members 51a of the
control relay for the purpose of eifecting 'de-‘
energization of the lamp 28 and'maintaining the
motor-operated pump 46 in operation.
The thermal relay 63 also controls the oper
ation of auxiliary relay 6| which closes its con
tact members em to maintain the motor-oper
ated pump 46 in operation and opens its contact
members ?lblto deenergize the lamp and to pre
vent energization of the lamp in the event that
the temperature of the’ cooling liquid is below
a predetermined value as determined by the set
ting of relay 63.
In the operation of the system, when the start
pump 46 and other devices which have been de
switch. 55 is closed, an obvious energizing circuit
‘for the control relay 5'! is established. The
closureof contact members 51?) thereof energizes
scribed in connection with Fig. l.
the pump motor 4'! over a circuit e'xtending'from
cuits and apparatus embodied in the controller '
:of Fig. 1, including the lamp 28, motor operated
.
Within the controller housingthere is mount 60 conductor‘ ' 69 through conductor ‘14, contact
-ed a main circuit breaker 54, start and stop push
members 511), conductor 15, stop switch 56,v con
ductor 16, normally closed contact members‘ 620
button switches 55 and 56, a control relay 51,
a control switch 58, a plurality of auxiliary con
and the armature of motor 41 to conductor ‘III.
This initiates the operation ‘of the circulating
trol relays 59, 6| and 62, a pair of thermal
' switches or. relays 63 and >64 and a ?ow switch " pump 48 which establishes a "flow of cooling
liquid through} the circulating system and the
160. In addition to the start and stop switches
waterjacketof the lamp 28.
' "55 and 56 mounted within the housing, another
As. soon as the ?ow attains a predetermined
pair of such switches 65 and 66 may be mount
ed outside of the housing if desired for remote
volume, the flow switch 160 operates to close its
70 contact members 60a to establish an'operating
control purposes.
'
' .
The main switch 54 is for the purposeof con
circuit for the controly‘switch 58,, This circuit
necting vthe controller to a source of current
extends from‘ conductor 10 through conductor
' 11,‘winding of switch 58, door switch 44, contact
vwhich, in thisinstance', is designated by the con
ductors 6'! and 68. When the main switch is
'member- 60a, contact v3members --6lb, 1 contact
closed, it energizes the circuits of the controller 75 members 62a, conductors "l8 and‘ 19,- contact
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relayw5T toagain start'themotortoperated pump‘.
membersiiic, conductor 16,; stop switch 56?, con
and; bring about‘ the operation of" the controi
ducto‘r; 75; contact members 51b ;.and. conductor
‘Mite conductor‘. 69.! Atl-this time, contact mem-.
bers 51b of the control relayt 511are closed asv
the startsswitch 55. isheld closed until thelamp
switch 58 as described hereinbefore.‘
“
In the event that the'temperature of the 0001
' ing liquid decreases ‘below. a predetermined ‘value,
isilighted;
either during the time the lamp 28‘is inopera-i
tion or is not in‘ operation, the thermal relay? 63
The closure of , controlswitch ‘58> energizes the .
primary‘ winding 13 of the. transformer through
. willifunction'to- energizeithe. heater 53 as -de-~
scribed hereinbefore and also the auxiliary relay,
a- circuit extending‘ fromlconductor 69 through.
conductor. 81, contact‘ members 58a, primary 10 El to close an‘energizing circuit‘for the pump?
motor 4‘! from conductor 69through contact‘
winding‘ 13,. winding. of. the ‘auxiliary relay 59,v
and conductor 82 to conductor 18. Contact mem-. ‘
members 57a of the control relay, contact mem
here 581). of control switch‘58b are‘ alsoclosed
at thistime but are not effective until after the
bers Elaand 62a to conductor 10. .
When relay BI is energized, its contact mem-.
closure of {auxiliary relay 59.‘
15 bers tlb are opened and since these contact:
members are in series with the contact members
Inlthe'cventlthat the-lamp 28 is in normal
66a of the ?ow switch 60 in the energizing cir
operating condition,- ‘su?icient current. will ?ow
cuit of the control switch 58, his apparent that
_ throughithewprimary“winding 13 to e?ect‘oper
the control switch 58 cannot be energized‘ to
ation ofthe auxiliary relay~59icausing its contact
members 59aito-be closed, ~The. closure of the. 20 energize the transformer ‘H during the time the
auxiliary relay 6| is energized.‘ This prevents? '
auxiliary‘ relay 59‘ establishes the main‘ ener
the energization of the lamp 28 by operation-of
gizing circuit for the-motor»?! andgalso the hold
ing circuit for the‘ control switch 58.
the start switch 55 in the event that the -tem-‘
This
perature of the cooling liquid is too low'and also
circuit extends ‘from conductor tathrough con
ductor. Bl,- contact members 58a, 58b ‘and59a, 25 automatically deenergizes the lamp in the event:
that the temperature of the cooling liquid be-,
stop switch‘ 56, conductorv 16, contact members
BZc‘i-and‘ armature of motor 41 to conductor ‘H3;
comes too low whilethe lamp is in operation. ‘
It-rwill now be noted, that this circuit depends‘
foreits' continuity upon several operating condi
tions Since it contains contact members 58a
suitable type and, in practice,’ aremountedupon
The thermal relays B3 and 64 may be of ‘any
30 the back of the controller housing so as to be re
sponsive to the temperature of the cooling liquid‘
and~58bof the control switch 58, which is under
the control‘ of the flow switch 58, it will be inter
rupted~ in the event that the volume of flow of
cooling ‘liquid decreases below a predetermined
value, Likewise, since it-contains contact mem
in the‘ reservoir-radiator.
‘
In view of the foregoing description of the‘
apparatus‘and operation thereof, it will be ‘ap&
bers'i59a-of auxiliary;v relay '59,- it will be inter
parent that my self-contained controller is par;
ticuiarly adapted for use with searchlights or.
rupted in theevent ‘that the lamp 28 fails or
light projectors which i are located at remote
something occurs which causes an» abnormal cur
points and are subjected to either constant "or
renteto-?ow through the primary Winding 73 of
the transformer, This‘circuit also contains con
tact "member 620 of auxiliary’ relay 62, which is
under the control of the thermal relay 64, so that
intermittent operation without constant attend-‘
ance.
One example of an application of ' this.
kind is for the measurement of ceiling heights at‘
airports which may beunattended, in which‘ event '
the controller and its associated projector could
be controlled by means" of the remote start and
’ it williibe interrupted in the event that the tem
peraturerof the cooling-liquid exceeds a prede
termined-value. The normally closed stop switch
561is alsoin this-circuit and is effective to in
stop switches 65 and 66.; The controller remains
terr-upt it‘at will of the operator. >
This is’ the normal operating condition of
theucircuits. In the event that the temperature
of ~the"c00ling liquid exceeds a predetermined
value; it is‘desired' to discontinue operation of
the/lamp ‘~28 andcontinue the operation of the
motor-operatedpump 4B in order that the cool
ingliquid will be circulated and cooled. This is
effected. through the operation of therma1 relay :
64'and auxiliary relay was referred to herein
before.
As soon as relay 62 is energized, its contact
energized atall times and can be exposed to
adverse weather conditions forthe’reason that“
the thermal relay 63, ‘immersion heater 53 and
the motor-operated pump 45 function automati
cally to maintain the temperature of the cooling
liquid above the freezing point.
This makes it ‘
possible to utilize water as a'cooling liquid which‘
isfthe cheapest and most satisfactory cooling
medium for lamps of this kind.
The thermal relay 64 which responds to exces
sive temperatures and the flow switch 60 pro
vides the necessary protection for the lamp re“
gardlesshof whether the controller is controlled
‘by anattendant through‘ operation of ‘the start
members 620 open the main energizing and hold
ir-ig; circuit just described, and deenergizes the 60 andstop switches 55 and 56 or is controlled from
awremote, point by switches 65 and 66.
controlswitch 58> and'transformer ‘H,’ and its
Accordingly, it will be appreciated that ‘my in
vention providesa compact self-contained con
troller of such nature as to permit greatly in
contact members 621) are closed to establish a
new‘genergizing‘ circuit-for the pump motor 41.
This circuit extends from conductor 69 through
conductors 8| and ‘83, contact members 521) and
armature ofthe motor 4'! to conductor 10. This
circuit will maintain the ‘motor in operation until
suchtime as the thermal relay 64 opens to de
energize relay 52.
The reclosure of contact members 620, how
ever,-willnot elfect aire-energization of the lamp
65
creased‘ utilization of the-high e?‘iciencies and.
light output of .theliquid-cooled light sources.
The ‘controller is so constituted as to properly
control the, operation of the lamp and protectit
at all times against damage from abnormal op~
crating conditions. In view of the fact that the.
for ?thervreason that auxiliary relay 59 has opened
its contact members 59a and these contact mem
controller embodies. a self-contained circulating
system ‘including a reservoir-radiator, it requires.
noseparate source of cooling liquid,
bers cannot/be closed untilthe start switch, 55
While Jihave disclosed a speci?cembodimenm
of'my invention, it will be apparent to those
haslagainwbeen actuated to energize the control
2,412,907
8
skilled in the art that other modi?cations thereof
may, be made‘ without departing from the prin
ciples of the invention as disclosed.
pump in response to a predetermined increase in
the temperature of the cooling liquid,‘ thereby to
e?ect 'deen'ergization of the lamp‘and maintain
the pump in operation.
5. In combination, a liquid-cooled lamp, a cir
culating system for cooling liquid connected to
said lamp, said circulating system including an
electrically-operated pump, circuit means for
connecting the lamp to a current source, said cir
. I claim as my invention:
, 1. In combination, a liquid-cooled lamp, means
including a motor operated pump for circulating
cooling’ liquid through the. lamp, means for
initiating operation of the motor-operated pump
to establish a flow of cooling liquid, an energiz
ing circuit forthe lamp, means including a con 10 cuit means including flow switch meansv respon
trol switch responsive to the volume of flow of
sive to volume of ?ow of said cooling liquid and
cooling liquid for controlling the said energizing
‘control switch means controlled thereby, circuit
circuit of the lamp, whereby the lamp is ener
means for controlling the operation of the elec
gized and de-energized in accordance with the
trically-operated pump, said circuit means in
volume of flow of cooling liquid, and tempera 15 cluding manual switcnmeans operable to initiate
ture-responsive means operable to de-energize
operation of the pump and additional switch
the control switch to de-energize the lamp in
means, responsive to a predetermined maximum
the event that the temperature of the cooling
temperature of the cooling liquid operable to de
liquid exceeds a predetermined maximum value.
energize the control switch means and to estab
2. In combination, a liquid-cooled lamp, a. sys 20 lish, an auxiliary energizing circuit to maintain
tem for ‘circulating cooling liquid through said
the electrically-operated pump in operation until.
lamp, said system including a reservoir-radiator
the temperature of the cooling liquid decreases
and a motor-operated pump, control switch
below said predetermined value.
means operable to energize the motor-operated
.6. In combination, a liquid-cooled lamp, a
pump, an energizing circuit for the lamp, switch 25 transformer having its secondary winding con
meansincluding a control switch responsive to
nected to the lamp and its primary winding dis
the flow of coo-ling liquid for closing said ener
posed for connection to a current source, a cir
gizing circuit to effect energization of the lamp,
culating system for cooling liquid connected to
an electric heater device mounted in said radia
the lamp, said system including an electrically
tor-reservoir, an energizing circuit for said 30 operated pump and a how switch, an energizing
heater, thermal switch means operable in re
circuit for the electrically-operated pump, con
sponse to a predetermined minimum tempera~
trol switch means operable to close said energiz
ture of the cooling liquid for closing the ener
ing circuit to effect the energization of the elec
gizing circuit of said electric heater, and relay
trically-operated pump, ?rst relay means respon
means responsive to the closure of said thermal 35 sive to the closure of the ?ow switch in response
switch means operable to cause said switch means
to a predetermined volume of flow of the cooling
to open the energizing circuit for the lamp and
vliquid for connecting the primary winding of the
to establish an energizing circuit for the motor
operated pump.
transformer to the current source, and second re- .
I
‘3. In combination, a liquid-cooled lamp, a sys
tem for circulating cooling liquid through said
lamp, said system including a reservoir-radiator
lay means responsive to the flow of current
40 through the primary winding of the transformer
operable to establish a holding circuit for main
taining the electrically-operated pump and ?rst
relay means energized to permit the control
and a motor-operated pump, an energizing cir
cuit for the pump, control switch means operable
to close said energizing circuit for the motor
switch means to be released.
‘
7. In combination, a liquid-cooled lamp, a
operated pump, an energizing circuit for the
lamp, switch means responsive to the ?ow of cool
transformer having its secondary winding con-_
nected to the lamp and its primary winding dis-,
ing liquid operable to close the lamp energizing
posed for connection to a current source, a cir
circuit, an electric heater device mounted in said
culating system for cooling liquid connected to
radiator-reservoir, an energizing circuit for said 50 the lamp, said system including an electrically-.
heater, thermal switch means responsive to a pre- ,
operated pump and a flow switch, an energizing
determined minimum temperature of the cooling
circuit for the electrically-operated pump, con
liquid for closing said energizing circuit of said
trol switch means operable to close said energiz
electric heater, and additional thermal switch
ing, circuit to effect the energization of the elec
means responsive to a predetrmined maximum 1
trically-operated pump, ?rst relaymeans respon
temperature of the cooling liquid operable to
sive to the closure of the flow switch in response
cause said control switch to open the energizing
to a predetermined volume of flow of the cooling
circuit of the lamp.
.
4. In combination, a liquid-cooled lamp, a mo
liquid for connecting the primary Winding of the
transformer to the current source, second relay
means responsive to the flow of current through’
tor-operated pump for circulating cooling liquid
through the lamp, an energizing circuit for said
the primary winding of the transformer operable
to establish a holding circuit for maintaining
the electrically-operated pump and ?rst relay
means energized to permit the control switch,
pump, switch means operable to close said circuit
to initially‘ energize the motor-operated pump,
an energizing circuit for the lamp, a control
switch operable to control said energizing circuit, 65 means to be released, and means responsive to the ;
said control‘switch also being operable to estab-'-'
increase in temperature of the cooling liquid op
lish an auxiliary energizing circuit for the pump
to permit release of said switch means, a ?ow
switch operable in response to a predetermined
volume of ?ow of cooling liquid to effect energiza
tion of the control switch to effect closure of the
energizing circuit of the lamp, and thermostatic
switch means operable to effect deenergization of
the control switch and to establish another aux
erable to deenergize said ?rst relay means to disconnect the primary winding of the transformer
from the current source.
70
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8. In combination, a liquid-cooled, lamp, a.
transformer having its secondary winding con
nected to the lamp and its primary Winding disposed for connection to a current source, a circu
latingsystem for cooling liquid connected to the
iliary energizing circuit for the motor-operated 75 lamp,
said system including an electrically-oper
2,412,907
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partment for cooling liquid, a circulating system
ated pump and a flow switch, an energizing cir
including a plurality of conduits for attachment
cuit for the electrically-operated pump, control
to the lamp and a motor-operated pump mounted
switch means operable to close said energizing
within the housing and connected to- the radiator
circuit to effect the energization of the electri
compartment, an electric heater
cally-operated pump, ?rst relay means operable CA reservoir
mounted in said compartment for heating the
to control the connection of the primary winding
cooling liquid, circuit means for connecting the
of the transformer to the current source, an ener
motor-operated pump and heater to a current
gizing circuit for said ?rst relay means, said ?ow
source, and thermal responsive control means
switch being operable to close said energizing cir
mounted
within the housing operable to control
cuit in response to a predetermined volume of
said circuit means to control the energization of
flow of the cooling liquid, second relay means ‘
the heater and motor-operated pump in accord
responsive to the ?ow of current through the pri
ance with predetermined temperature conditions
mary winding of the transformer operable to
of the cooling liquid.
establish a holding circuit for maintaining the
12. A self-contained controller for use with a
electrically-operated pump and ?rst relay means
liquid-cooled lamp comprising, a box~like con
energized to permit the control switch means to
troller housing having a radiator-reservoir com
be released, and means responsive to the temper
partment, a circulating system including a motor
ature of the cooling liquid operable to open the
operated pump mounted within the housing and
energizing circuit of the ?rst relay means for pre
venting energization of said ?rst relay means in 20 connected to the radiator-reservoir compartment,
circuit means within the housing operable when
response to the closure of the flow switch in the
energized to initiate operation of the motor-op
event that the temperature of the cooling liquid
erated pump, a control switch mounted within
is below a predetermined value.
the
housing operable to control the energization of
9. A self-contained controller for liquid-cooled
the lamp, an energizing circuit for the control
lamps comprising, a housing having a back wall,
switch, a flow switch disposed in the circulating
a dish-shaped member attached to said back wall
system operable to close said energizing circuit for
and forming therewith a reservoir for cooling
the control switch in response to a predetermined
liquid, a circulating system including connections
?ow of cooling liquid, and thermal switch means
for attachment to the lamp and said reservoir, a
motor-operated circulating pump mounted with 30 operable in response to predetermined tempera
ture conditions of the cooling liquid to interrupt
in the housing for circulating the cooling liquid
the energizing circuit for the control switch and
through the circulating system, a control switch
to maintain the circuit means for the motor-op
mounted within the housing operable to control
erated pump energized so as to maintain said
the energization of the lamp, a flow switch
pump
in operation.
mounted within the housing and connected in the 35
13. A self-contained controller and cooling unit
circulating system for controlling the operation
of the control switch in accordance with the ?ow
for use with liquid-cooled lamps comprising, a
box-like controller housing having a front door
of cooling liquid, manually-operable switch means
and a back wall, a lamp energizing circuit within
mounted within the housing for controlling the
energization of‘ the motor-operated pump, and 40 the housing disposed for connection with the
lamp, a dish-shaped housing secured to the out
temperature responsive switch means also
side of the back wall and forming therewith a ra
mounted within the housing for controlling the
diator-reservoir, a liquid circulating system in
energization of the motor-operated pump inde
cluding an electrically-operated circulating pump
pendently of the manually-operable switch means.
10. A self-contained controller for liquid-cooled ‘ >
lamps comprising, a controller housing provided
with a hinged door and having a back wall, a dish
shaped radiator housing attached to the back wall
and forming therewith a radiator-reservoir for
and a flow switch mounted within the controller
housing and connected to the radiator-reservoir,
said circulating system having inlet and outlet
connections extending outof the controller hous
ing for connection to a lamp, a control switch
within the housing responsive to said
cooling liquid, a circulating system connected with 50 mounted
flow switch for controlling said lamp energizing
the radiator-reservoir including a, plurality of
circuit, an electric heater mounted within the
conduits disposed to be attached to the lamp and
controller housing in heating relation. with the
a motor-operated circulating pump, a control
cooling liquid, a thermal switch mounted within
switch mounted within the housing operable to
control the energization of the lamp, a flow
switch connected in the circulating system for
controlling the operation of the control switch,
, the controller housing for controlling the ener
gization of the heater, an energizing, circuit
mounted within the controller housing for the
electrically-operated pump, switch means oper
an electric heater mounted within the controller
able to close said energizing circuit to initiate the‘
housing to extend into the radiator-reservoir, and
operation of the pump, and relay means within
a thermal switch mounted within the controller 60 the housing controlled by said thermal switch for
housing for controlling the energization of the
initiating operation of the pump independently of
heater.
said
switch means.
11. A self-contained controller for use with a
WILLIS A. PENNOW.
liquid-cooled lamp comprising, a box-like con
troller housing having a radiator-reservoir com 65
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