US1676302A - Exhaust machine - Google Patents

Exhaust machine Download PDF

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Publication number
US1676302A
US1676302A US100708A US10070826A US1676302A US 1676302 A US1676302 A US 1676302A US 100708 A US100708 A US 100708A US 10070826 A US10070826 A US 10070826A US 1676302 A US1676302 A US 1676302A
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US
United States
Prior art keywords
vacuum
backer
pump
exhaust
pumps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US100708A
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English (en)
Inventor
Poel Johannes Marinus Van Der
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US1676302A publication Critical patent/US1676302A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/385—Exhausting vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F9/00—Diffusion pumps

Definitions

  • This invention relates to exhaust machines of the type which has an' intermittently rotating carrier for the vessels to be exhausted, and a number of highvacuum pumps moving with the carrier, the heads or holders 'for-the vessels to be exhausted being attached to the carrier and each head connected to a high vacuum pump.
  • Exhaust machines of this general type have been used, especially in exhausting incandescent lamps,'radio tubes, and other electrical apparatus, the vessel to be exhausted being directly connected to the high vacuum pump during the entire process of exhaust.
  • a reservoir or bufler chamber common to all the high vacuum pumps is inserted between them and the rough vacuum piping to act as a hacker for the high vacuum pumps and preserve thefvacuuma vOne drawback of suchexhaust machines is that when a.
  • the present invention overcomes this difiiculty by providing means to con nect the hacker pipe between each high vacuum pump and its backer or rough vacuum pump separately to the rough vacuum pump before the final exhaust is started, and then to seal 'aifr tight the backer pipe of each pump during final exhaust.
  • the backer pipesof the high vacuum pumps are ,con-
  • the air which is pumped out of the vessels to be exhausted by the high vacuum pumps after the backer pipes are closed will tend to increase the pressure of 'ly used 'begin to operate the hacker vacuum, but in accordance with the inventionthe volume ofthe backer vacuum pipe between the high vacuum pump and the valve, disc is made so large'thatthepipe serves thepurpose of a hacker vacuum pre server which keeps the hacker vacuum pres sure below themaximum at which the high vacuum mercury vapor jet pumps common-1
  • the backer vacuum pipes are formedasflarge spirals or helices, which may be cooled by the cooling water he placed entirely outside of the pump.
  • the pipes should be cooled'in order to condense any mercury vapor sucked vthru with the air.
  • the backer vacuum pipes of the high vacuum pumps may also be connected to the vacuum system, but it will generally be bet ter to connect'the backer vacuum pipe rough vacuum pump in order to insure a I good vacuum on the backer vacuum side.
  • the fvalve system of the exhaust machine may, in accordance with the invention, be made with a rotating valve disc provided with asJ-many ports as thereare high vacuum pumps ,on the exhaust machine, ..the backer vacuum pipesof the high vacuum pumps vterminating at these ports, and a stationary valve seat fitting air tight to the rotatable valve disc and having one or more. ports connected to rough vacuum pumps and registering with the ports in the rotating Valve disc when the intermittently rotating carrier is standing still.
  • one or more annular slots may also be made in the cont-acting surfaces.
  • valve disc and valve seat to surround the ports in the surfaces,.these slots being connected to a vacuum pump.
  • Fig. 1 is a plan view of the" machine
  • Figure 2 is a vertical section along the line 1111 in Figure 1
  • Figure 3 is a vertical section of the mercury vapor jet or condensation pump which serves in the exhaust machine
  • Figure 4 and --air tight connections between the exhaust Figure 5 are respectively a vertical section and a plan of the valve used in the machine shown in the drawing.
  • Each head is connected to the exhaust pipe of a mercury vapor condensation pump by meansof high vacuum tubing 23 (Fig. 2).
  • the mercury vapor condensation pump is provided with a boiler 26'.(Fig. 3) for the mercury, or other metal with low melting point, and a heating coil 27 isplaced inside of the boiler.
  • the mercury vapor produced by the heating passes up thru the vapor conduit 28 and is deflected thru the holes in this conduit downward thru the ring shaped jet nozzles 29 and 30. .
  • the mercury vapor thereby takes the air molecules from the vessel to be exhausted along with it thru the exhaust pipe 25 and condenses against the wall of the pipe 25.
  • the liquefied mercury drops into the chamber 31 from which it is drained into the supply tubes 32 and 33.
  • the air that was drawn by the vapor is sucked off thru the spiral pipe 34 which leads out of the cover plate of the chamber 31.
  • the pipe 25 and the spiral tube 34 are surrounded by a water jacket 35 thru which the cooling liquid, for instance water, may be made to flow.
  • the boiler 26 is surrounded by a heat insulating cover 36.
  • the backer vacuum pipe 38 (Fig. 2) is a as the high vacuum pump continuation of the spiral tube 34 andin order to increase its volume part of it is wound as a sp ral.
  • the backer vacuum pipe is connected air tight tothe rotating valve disc 7 (Fig. 5) which is attached tothe tubular shaft- 6 by means of aset screw 39 (Fig. 4).
  • the air tight connection "between the hacker vacuum pipe and the valve disc 7 may be made bymeans of a gasket 40, made of rubber or similar elastic product," which is pressed around the pipe 38 by .means of a nut 41.
  • hacker vacuum pipe 38 comes into position opposite a port 42 in the stationary valve seat'8.
  • This port is connected to a rough vacuum pump or to the rough vacuum piping of the shop through a rough vacuum pipe44.
  • the port 42 of the valve disc 7 is closed by the blank surface of the stationary valve seat 8 and the backer vacuum sides of the metal vapor con-' densation pumps 31 in those positions constitute an enclosed space.
  • the stationary valve disc 8 isv provided with a ring shaped slot 45 (Fig. 5) which is connected to a vacuum pump by means of aport 46.
  • the cooling water is supplied to the jacket 35 of the metal vapor condensation pumps by means of the inlet pipe 50.
  • This pipe has a water tight connection with the internnttently rotating shaft 49 and terminates in a chamber in this shaft. From this chamber the water supply pipes 5l take the water to the jackets 35-. The water is drained thru the outlet pipes 52 into a stationary tank 53 from which it can be removed. This tank may as a matter of convenience be mounted on pedestals 54.
  • the carrier can be made to rotate intermittently in the usual wayby well known mechanism not shown in the drawing, and of which only a gear 68 is indicated, which may be driven by an electric motor.
  • the shaft of this gear carries an arm 69 on the end of which there is a roller 70 meshing in the slot 71 of the carrier 3 to rotate the carrier intermittently.
  • the drawing shows a, practical embodiment of the invention in which seven exhaust heads are placed on the rotatable carrier,-
  • the condensation pumps must be designed as shown in F igure 3 of the drawing to operate both when .full of air and when the backer vacuum side is suddenly connected to a good vacuum.
  • a high vacuumpump which can operate against a rather' high backer vacuum pressure, such as the mercury vapor condensation pump of Fig. 3,
  • Red phosphorus is often used in vacuum lamps to improve the vacuum of the-lamp.
  • the phosphorus is introduced, for instance, by either dipping the filament in a suspen- "easily, as, for example,
  • metal vapor condensation pumps should'be made so as to be cleansed internally very by making the cups 29 and 30 of Fig. 3, where the nozzles point downward, removable. In the position G the bulb is sufliciently exhausted and can besealed off. After this sealed oif exhaust tube a new lamp can be inserted in the head 10.
  • An exhaust machine comprising an intermittently rotatable carrier having a pluralityyof exhaust heads, an equal number -on and; movable with said carrier-and each directly connected to a corresponding exhaust head, a rough pump toact as a backer for said final pumps,
  • An exhaust machine comprising an 'intermittently rotatable carrier having a lu-"" rality of exhaust heads',a plurality of nal pumps mounted 'on and movable With'said carrier andeach directly connected to a corresponding exhaust head, a'roughpump to act as a backer forsaid final pumps,
  • An exhaust machine comprising an intern'iittently rotatable carrier havinga plurality of exhaust heads, a plurality of'final pumps mounted ,on and movable with said carrier and each directly connected to a corresponding exhaust head, a rough pump to act as a backer for said final pumps, backer pipes of large diameter shaped into a helix and connected to the outlets of said final pumps. and a valve rotatable with said carrier to control at points remote from said final pumps the connections between s aidrough pump and said backer pipes to connect each backefipipe to said rough pump in one position andto seal it in subsequentpositions.
  • An ,exha'ust machine comprising an'intermittently rotatable carrier having a plurality of exhaust heads, a plurality of final pumps mounted on and movable with said carrier and each directly connected to a corresponding exhaust head, a rough pump to act as a backer for said final pumps, a
  • backer pipe connected to the outlet of each final pump and of suificient capacity to preserve when exhausted and sealed a hacker vacuum during exhaust by the final pump of the vessel in the exhaust head, and a valve between said backer pipes andsaid rough pump having ports connected to said backer pipes and actuated by'said carrier to first connect each backer pipe to the rough pump and subsequently seal said pipe at a point remote from said final pump during the ex.- haust of said vessel by the final pump.
  • An exhaust machine comprising a movable exhaust head, a final pump connected directly to and movable with said head and discharging into a hacker pipe of sufficient capac1ty when exhausted to act as a hacker tor the final pump, a stationary rough pump, and means actuated in synchronism With said head to automatically connect said pipe to said pump during a portion of the travel of said head and to seal said pipe at a point remote from said final pump during the remainder of the travel of said head.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Prevention Of Fouling (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US100708A 1925-06-02 1926-04-08 Exhaust machine Expired - Lifetime US1676302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL30367A NL22654C (enrdf_load_stackoverflow) 1925-06-02 1925-06-02

Publications (1)

Publication Number Publication Date
US1676302A true US1676302A (en) 1928-07-10

Family

ID=19781190

Family Applications (1)

Application Number Title Priority Date Filing Date
US100708A Expired - Lifetime US1676302A (en) 1925-06-02 1926-04-08 Exhaust machine

Country Status (6)

Country Link
US (1) US1676302A (enrdf_load_stackoverflow)
BE (1) BE334077A (enrdf_load_stackoverflow)
DE (1) DE466639C (enrdf_load_stackoverflow)
FR (1) FR32504E (enrdf_load_stackoverflow)
GB (1) GB253112A (enrdf_load_stackoverflow)
NL (1) NL22654C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450243A (en) * 1942-09-19 1948-09-28 Continental Can Co Container sealing machine having seaming mechanism actuated by fluid pressure operated means responsive to vacuum
US2808857A (en) * 1954-12-23 1957-10-08 Gen Electric Exhaust machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450243A (en) * 1942-09-19 1948-09-28 Continental Can Co Container sealing machine having seaming mechanism actuated by fluid pressure operated means responsive to vacuum
US2808857A (en) * 1954-12-23 1957-10-08 Gen Electric Exhaust machine

Also Published As

Publication number Publication date
FR32504E (fr) 1928-01-24
GB253112A (en) 1926-10-14
BE334077A (enrdf_load_stackoverflow)
NL22654C (enrdf_load_stackoverflow) 1929-10-15
DE466639C (de) 1928-10-11

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