US2532858A - Cooling device for electric discharge tubes - Google Patents

Cooling device for electric discharge tubes Download PDF

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Publication number
US2532858A
US2532858A US25705A US2570548A US2532858A US 2532858 A US2532858 A US 2532858A US 25705 A US25705 A US 25705A US 2570548 A US2570548 A US 2570548A US 2532858 A US2532858 A US 2532858A
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vanes
cooling
rings
wall
channels
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Expired - Lifetime
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US25705A
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Rinia Herre
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HARTFORD NATIOANL BANK AND TRU
HARTFORD NATIOANL BANK AND TRUST Co
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HARTFORD NATIOANL BANK AND TRU
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/32—Anodes
    • H01J19/36—Cooling of anodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0027—Mitigation of temperature effects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/903—Convection

Definitions

  • This invention relates to a cooling device for an electric discharge tube comprising a cylindrical cooled wall which is provided with a number of cooling vanesextending substantially at right angles to this wall and parallel to the generatrices of this wall, the cooling medium being supplied and/or carried off respectively through at least one channel which extends transversely to the direction of length of the cooling vanes.
  • the invention furthermore relates to an electric discharge tube adapted to be cooled in such a device.
  • the length of the cooling vanes in a cooling device of the character indicated above exceeds a given value, it is very difficult to solder or to weld a large number of closely adjacent cooling vanes to the cooled wall in such manner that an intimate thermal contact is ensured throughout their length.
  • Both the cooled wall consisting of a material having a high thermal conductivity and the cooling vanes of thin sheet metal usually exhibit unevennesses, owing to which the cooling vanes do not d rectly engage the wall throughout their length. This is true whether the vanes are each secured individually to the cooled wall or are united in some Way to form a zigzag band.
  • a cooling device for an electric discharge tube comprising a cylindrical cooled wall provided with a number of cooling vanes which extend substantially at right angles to this wall and parallel to the generatrices thereof the cooling medium is supplied and/or carried ofi respectively through at least one channel extendtending transversely to the direction of length of the cooling vanes which, according to the invention, are arranged in a number of rings arranged side by side, with the vanes in end-wise relationship, the separation between two rings being in each case centrally located in front of a channel which may serve either as a supply or as a discharge channel.
  • the separation between the rings of vanes then constitutes, in addition, the partition between the opposite streams of cooling medium associated with the supply or discharge channel, respectively, in situ.
  • the cooling vanes are of a comparatively large size radial, it is desirable that the stream of cooling medium should penetrate throughout the length to the bottom of the spaces between the cooling vanes. This can be achieved by leaving some clearance between the rings of cooling vanes, so that a channel, into which the clearances between the vanes open, is formed all over the periphery of the cylindrical coo-led wall. If, however, the cooling vanes are only of a small radial size, it is advisable to provide partition walls between the rings of cooling vanes, for example by providing, between the adjacent rings of vanes a flat ring which fits around the cylindrical cooled wall.
  • the rings of vanes are preferably formed into zigzag bands in the manner indicated in U. S. patent specification No. 616,421, now abandoned, according to which the clearance between the parts of a zigzag band is removed by pressure on the side of the cooled wall.
  • the above-described system of arranging the cooling vanes in a number of rings has the advantage that cooling vanes of identical length can be used for cooled walls of different length, viz., by modifying the number of rings. This results in a reduction of manufacturing expenses, since it is not necessary to provide rings with different-s ze vanes for cooled discharge tubes of different size.
  • Fig. 1 is a side-view of a cooling device comprising an electric discharge tube according to the invention with the wall partly broken away
  • Fig. 2 is a cross-section of the same device on the line II-II in Fig. 1.
  • the reference numeral I designates the glass wall of the electric discharge tube, which is otherwise not essential.
  • the reference numeral 2 designates the circular-cylindrical metal anode to which rings of cooling vanes 3 are secured.
  • the wall of three of the annular channels 4 is partly broken away to show the relative position of the rings of vanes.
  • numeral 5 designates the annular channel formed between two spaced rings of vanes, '1 designating a fiat ring arranged between two rings of vanes and 8 denoting the drops of solder left between two rings of vanes pressed together.
  • exhaust cooling-air flows between the channels 4 freely into the open air.
  • the same arrangement could be used for cooling the wall 2, if pipe 5 were connected to a suction device and thus used as a discharge pipe, while fresh air is sucked in between the channels 4.
  • a cooling device for an electron discharge tube of the type having a cylindrical wall to be cooled, cooling vanes extending substantially at right angles to said wall and parallel to the generatrices thereof, said device comprising a plurality of channels for the exchange of cooling medium, said channels extending transversely to the direction of said cooling van-es, and a plurality of adjacent rings of said cooling vanes, with separations between said rings of vanes, each of said separations being centrally dispcsed in front of one of said exchange channels.
  • An electron discharge tube having an external wall to be cooled and including a cooling device of the type having cooling vanes extending substantially at right angles to said wall and parallel to the generatrices thereof, said device comprising a plurality of channels for the exchange of cooling medium, said channels extending transversely to the direction of said cooling vanes, and a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side, with slight separations, over a substantial length of the tube wall with said vanes in endwise relationship, each of said separations being centrally disposed in front of one of said exchange channels.
  • An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common supply pipe for conveying cooling medium to said channels.
  • An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common pipe for the discharge of cooling medium from said channels.
  • An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common pipe for said channels, said pipe being capable of serving as a supply pipe for cooling medium when connected to a source of supply thereof, and capable of serving as a discharge pipe when connected to a suction device.

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  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

Dec. 5, 1950 H. RlN lA 2,532,858
COOLING DEVICE FORELECTRIC DISCHARGE TUBES Filed May 7, 1948 INVENTOR. HERRE RZNIA AGFN T.
Patented Dec. 5, 1950 COOLING DEVICE FOR ELECTRIC DISCHARGE TUBES Her-re Rinia, Eindhoven, Netherlands, assignor to Hartford National Bank and Trust Company, Hartford, Conn, as trustee Application May 7, 1948, Serial No. 25,705 In the Netherlands June 18, 1947 5 Claims.
This invention relates to a cooling device for an electric discharge tube comprising a cylindrical cooled wall which is provided with a number of cooling vanesextending substantially at right angles to this wall and parallel to the generatrices of this wall, the cooling medium being supplied and/or carried off respectively through at least one channel which extends transversely to the direction of length of the cooling vanes. The invention furthermore relates to an electric discharge tube adapted to be cooled in such a device.
If the length of the cooling vanes in a cooling device of the character indicated above exceeds a given value, it is very difficult to solder or to weld a large number of closely adjacent cooling vanes to the cooled wall in such manner that an intimate thermal contact is ensured throughout their length. Both the cooled wall consisting of a material having a high thermal conductivity and the cooling vanes of thin sheet metal usually exhibit unevennesses, owing to which the cooling vanes do not d rectly engage the wall throughout their length. This is true whether the vanes are each secured individually to the cooled wall or are united in some Way to form a zigzag band.
It has therefore, proved advantageous to make the cooling vanes not too long, thus providing a number of rings of cooling vanes side by side on the cyclindrical cooled wall.
However, a new difiiculty arises with an arrangement as described. The cooling vanes of the various rings will, in general, not be in line with each other, so that a stream of cooling medium passing in a longitudinal direction of the vanes from one ring of cooling vanes to the other experiences a high resistance. The invention overcomes the latter disadvantage and yields definite advantages.
In a cooling device for an electric discharge tube comprising a cylindrical cooled wall provided with a number of cooling vanes which extend substantially at right angles to this wall and parallel to the generatrices thereof the cooling medium is supplied and/or carried ofi respectively through at least one channel extendtending transversely to the direction of length of the cooling vanes which, according to the invention, are arranged in a number of rings arranged side by side, with the vanes in end-wise relationship, the separation between two rings being in each case centrally located in front of a channel which may serve either as a supply or as a discharge channel. The separation between the rings of vanes then constitutes, in addition, the partition between the opposite streams of cooling medium associated with the supply or discharge channel, respectively, in situ.
If the cooling vanes are of a comparatively large size radial, it is desirable that the stream of cooling medium should penetrate throughout the length to the bottom of the spaces between the cooling vanes. This can be achieved by leaving some clearance between the rings of cooling vanes, so that a channel, into which the clearances between the vanes open, is formed all over the periphery of the cylindrical coo-led wall. If, however, the cooling vanes are only of a small radial size, it is advisable to provide partition walls between the rings of cooling vanes, for example by providing, between the adjacent rings of vanes a flat ring which fits around the cylindrical cooled wall.
It will, in general, be suflicient to press the rings of cooling vanes against each other in 1011- gitudinal direction. Since the cooling vanes of the various rings are not in line with each other, a partition wall for the flow of cooling medium between the adjacent rings is thus formed, as indicated above. Furthermore, the fact that the cooling vanes of the various rings are not in alignment results in that in these areas solder will more readily adhere than between the vanes themselves. In general, however, this is not objectionable, since the partition between the rings of vanes serves as a separation between the currents of air. Consequently, there is no objection to clamping the cooling vanes, whether united to form a zigzag band or not, about the cooled wall and to plunging the assembly into a solder bath, so that the time consuming soldering of the vanes or rings of vanes each individually is disposed of.
The rings of vanes are preferably formed into zigzag bands in the manner indicated in U. S. patent specification No. 616,421, now abandoned, according to which the clearance between the parts of a zigzag band is removed by pressure on the side of the cooled wall.
The above-described system of arranging the cooling vanes in a number of rings has the advantage that cooling vanes of identical length can be used for cooled walls of different length, viz., by modifying the number of rings. This results in a reduction of manufacturing expenses, since it is not necessary to provide rings with different-s ze vanes for cooled discharge tubes of different size.
In order that the invention may be more clearly understood and readily carried into effect, it will now be described more fully with reference to the accompanying drawing, in which Fig. 1 is a side-view of a cooling device comprising an electric discharge tube according to the invention with the wall partly broken away, and Fig. 2 is a cross-section of the same device on the line II-II in Fig. 1.
In the drawing, the reference numeral I designates the glass wall of the electric discharge tube, which is otherwise not essential. The reference numeral 2 designates the circular-cylindrical metal anode to which rings of cooling vanes 3 are secured. Around the cooling vanes is provided a number of annular channels 4 which communicate at one side with a common supply pipe 5. The wall of three of the annular channels 4 is partly broken away to show the relative position of the rings of vanes. numeral 5 designates the annular channel formed between two spaced rings of vanes, '1 designating a fiat ring arranged between two rings of vanes and 8 denoting the drops of solder left between two rings of vanes pressed together. The
exhaust cooling-air flows between the channels 4 freely into the open air. The same arrangement could be used for cooling the wall 2, if pipe 5 were connected to a suction device and thus used as a discharge pipe, while fresh air is sucked in between the channels 4.
What I claim is:
1. A cooling device for an electron discharge tube of the type having a cylindrical wall to be cooled, cooling vanes extending substantially at right angles to said wall and parallel to the generatrices thereof, said device comprising a plurality of channels for the exchange of cooling medium, said channels extending transversely to the direction of said cooling van-es, and a plurality of adjacent rings of said cooling vanes, with separations between said rings of vanes, each of said separations being centrally dispcsed in front of one of said exchange channels.
2. An electron discharge tube having an external wall to be cooled and including a cooling device of the type having cooling vanes extending substantially at right angles to said wall and parallel to the generatrices thereof, said device comprising a plurality of channels for the exchange of cooling medium, said channels extending transversely to the direction of said cooling vanes, and a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side, with slight separations, over a substantial length of the tube wall with said vanes in endwise relationship, each of said separations being centrally disposed in front of one of said exchange channels.
The reference 3. An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common supply pipe for conveying cooling medium to said channels.
4. An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common pipe for the discharge of cooling medium from said channels.
5. An electron discharge tube including a cooling device having cooling vanes of the type as claimed in claim 2, said device comprising a plurality of rings of said cooling vanes, said rings of vanes being arranged side by side in slightly spaced relationship over a substantial length of the tube wall with said vanes in endwise relationship, a plurality of channels extending transversely to the direction of the cooling vanes, said rings of vanes having their spaced ends centrally arranged with respect to said channels, and a common pipe for said channels, said pipe being capable of serving as a supply pipe for cooling medium when connected to a source of supply thereof, and capable of serving as a discharge pipe when connected to a suction device.
HERRE RINIA.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,045,659 Lindenblad June 30, 1936 2,324,034 Skene July 13, 1943 2,406,121 Young Aug. 20, 1946 2,468,088 Lewthwaite et al. Apr. 26, 1949 2,476,647 Weschler et al July 19, 1949 FOREIGN PATENTS Number Country Date 514,651 Great Britain Nov, 14, 1939
US25705A 1947-06-18 1948-05-07 Cooling device for electric discharge tubes Expired - Lifetime US2532858A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291202A (en) * 1963-08-12 1966-12-13 Machlett Lab Inc Coolant distributor device
US4768581A (en) * 1987-04-06 1988-09-06 International Business Machines Corporation Cooling system for semiconductor modules
US6034467A (en) * 1995-04-13 2000-03-07 Ilc Technology, Inc. Compact heat sinks for cooling arc lamps

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2045659A (en) * 1935-03-15 1936-06-30 Rca Corp Electron tube cooling system
GB514651A (en) * 1938-05-12 1939-11-14 M O Valve Co Ltd Improvements in air-cooled thermionic valves
US2324034A (en) * 1942-04-23 1943-07-13 Bell Telephone Labor Inc Air-cooled power amplifier
US2406121A (en) * 1943-01-22 1946-08-20 Rca Corp Heat transferring means suitable for thermionic discharge apparatus
US2468088A (en) * 1945-10-17 1949-04-26 Standard Telephones Cables Ltd Adjustable mounting system for power tubes
US2476647A (en) * 1946-06-29 1949-07-19 Rca Corp Cooling system for electron discharge devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2045659A (en) * 1935-03-15 1936-06-30 Rca Corp Electron tube cooling system
GB514651A (en) * 1938-05-12 1939-11-14 M O Valve Co Ltd Improvements in air-cooled thermionic valves
US2324034A (en) * 1942-04-23 1943-07-13 Bell Telephone Labor Inc Air-cooled power amplifier
US2406121A (en) * 1943-01-22 1946-08-20 Rca Corp Heat transferring means suitable for thermionic discharge apparatus
US2468088A (en) * 1945-10-17 1949-04-26 Standard Telephones Cables Ltd Adjustable mounting system for power tubes
US2476647A (en) * 1946-06-29 1949-07-19 Rca Corp Cooling system for electron discharge devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291202A (en) * 1963-08-12 1966-12-13 Machlett Lab Inc Coolant distributor device
US4768581A (en) * 1987-04-06 1988-09-06 International Business Machines Corporation Cooling system for semiconductor modules
US6034467A (en) * 1995-04-13 2000-03-07 Ilc Technology, Inc. Compact heat sinks for cooling arc lamps

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