US2678761A - Exhaust head assembly - Google Patents

Exhaust head assembly Download PDF

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Publication number
US2678761A
US2678761A US258772A US25877251A US2678761A US 2678761 A US2678761 A US 2678761A US 258772 A US258772 A US 258772A US 25877251 A US25877251 A US 25877251A US 2678761 A US2678761 A US 2678761A
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Prior art keywords
housing
closure
chamber
opening
sealing
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US258772A
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English (en)
Inventor
Horace G Warren
Judd H Black
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Consolidated Vacuum Corp
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Consolidated Vacuum Corp
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Publication date
Priority to NL87415D priority Critical patent/NL87415C/xx
Application filed by Consolidated Vacuum Corp filed Critical Consolidated Vacuum Corp
Priority to US258772A priority patent/US2678761A/en
Priority to DEE6388A priority patent/DE942532C/de
Priority to GB30291/52A priority patent/GB722303A/en
Application granted granted Critical
Publication of US2678761A publication Critical patent/US2678761A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
    • 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

Definitions

  • This invention relates to apparatus for use in evacuating articles such as radio tubes or the like and is particularly concerned with a combined exhaust port and vacuum valve assembly forming an exhaust head assembly especially adapted for use in tube evacuating equipment.
  • the manufacture of many hollow articles involves evacuation at some stage of the process.
  • vacuum tubes such as radio tubes, cathode ray tubes, X-ray tubes and the like
  • the tubes are evacuated, and then sealed off while so evacuated.
  • articles such as light bulbs and liquid switches are evacuated and back filled with a different gas or liquid.
  • Vacuum tubes and similar articles are usually evacuated by means of a pumping system comprising a high vacuum diffusion pump backed by a mechanical vacuum pump.
  • Exhausting apparatus to be commercially successful must be capable of a very high production rate; since, for example, miniature vacuum tubes are usually processed at the rate of at least 800 tubes per hour on a single exhausting machine with a plurality of exhaust ports.
  • Exhausting apparatus must include a suitable exhaust port for connecting the article to be evacuated to the pumping system, and a suitable vacuum valve assembly for opening the vacuum system after the article to be evacuated is sealed into the exhaust port and for closing the vacuum system before the finished article is removed from the port.
  • a suitable exhaust port for connecting the article to be evacuated to the pumping system
  • a suitable vacuum valve assembly for opening the vacuum system after the article to be evacuated is sealed into the exhaust port and for closing the vacuum system before the finished article is removed from the port.
  • solenoid valves were commonly employed for opening and closing the vacuum system, either in response to pressure changes or by means of electrical contacts operable at predetermined positions or at predetermined times. Such solenoid valves had the disadvantages of being subject to mechanical failure and of necessitating an expensive and complex system.
  • Another object of the invention is to provide an exhaust port can be inserted and removed without the difliculties attendant to usual ports.
  • Another object of the invention is to provide simple valve means minimizing chanical failure and ensuring closing of the system during insertion and removal of the articles to be evacuated and opening of the system in response to scaling the article into the exhaust port.
  • Another object of the invention is to provide a simplified assembly which functions mechanically both as an exhaust port and a vacuum valve.
  • Another object of the invention is to provide a combined port and valve assembly wherein the action of the valving system isv automatically and mechanically responsive to the action of the exhaust port.
  • Another object of the invention is to provide an exhaust port including simple and efiective means for back filling evacuated articles.
  • Another object of the invention is to provide a port and valve assembly wherein the port mechanism and the valve mechanism coact mechanically to ensure proper synchronization of their respective functions.
  • Another object of the invention is to provide a combined port and valve assembly having a minimum volume to be exhausted in each evacuating cycle.
  • Another object of the invention is toimprove apparatus especially adapted for facilitating high speed processing of vacuum tubes.
  • Another object of the invention is to provide a simple and compact port and valve exhaust head assembly adapted to be mounted directly on a high Nacuum diffusion pump.
  • Another object of the invention is to provide a port and valve assembly of a construction particularly effective for minimizing mechanical failure.
  • Fig. 1 is a top view, partially broken away and in section, of a preferred port and valve assembly combining to form an exhaust head assembly embodying the invention, the assembly being shown with the port open and the valve closed;
  • Fig. 2 is a View in elevation, partially broken away and in section, of the preferred apparatus shown in Fig. 1;
  • Fig. 3 is a top view partially broken away and in section of the apparatus of Fig. 1, shown with the port closed and the valve open;
  • Fig. 4 is a fragmentary sectional view in elevation of the preferred apparatus shown with the port closed and the valve open;
  • Fig. 5 is a view in elevation, partially broken away and in section of an alternative port and valve assembly embodying the invention
  • Fig. 6 is a top view, partially broken away and in section, of the apparatus shown in Fig. 5;
  • Fig. 7 is a fragmentary view in elevation of the toothed upper rim of the assembly housing.
  • a housing and a closure assembly combine to form an evacuable chamber.
  • the closure assembly is provided with an opening extending therethrough communicating with the chamber and adapted to receive the neck of an article to be evacuated.
  • the housing includes at least one exhaust outlet for evacuating the chamber when connected with a suitable pumping system.
  • Inside the chamber is a stationary valve member which is arranged for closing the opening in the closure assembly.
  • An extensible bellows member is disposed in the chamber so as to encircle the valve member, one end of the bellows member being secured to the closure assembly around the opening through the closure assembly, the other end of the bellows member being secured to the housing around the exhaust outlet.
  • the closure assembly includes a resilient sealing member having the opening extending through it, together with adjustable means for alternately compressing and releasing the sealing member.
  • the apparatus also includes means cooperating mechanically with the adjustable means for moving the closure assembly out of closing relation with the stationary valve member during compressing of the sealing member whereby both the opening through the closure assembly and the exhaust outlet are in communication with the chamber when the sealing member is compressed in vacuum tight relation around the neck of the article to be evacuated, the apparatus being constructed and arranged for maintaining the valve member in closing relation with the closure assembly when the sealing member is uncompressed.
  • the neck or similar portion of an article to be evacuated is inserted into the opening through the closure assembly which serves as a port, the opening being sealed off from the chamber by the valve member.
  • the resilient sealing member is then compressed inwardly against the neck of the article to be evacuated thus closing the port and forming a vacuum-tight seal.
  • the movement of the adjustable means which compresses the sealing member also causes the closure assembly to move out of closing relation with the valve whereby the closure assembly opening and hence the article to be evacuated is in direct communication with the chamber and, through the chamber and exhaust outlet, with the vacuum pumping system.
  • the bellows member effectively maintains the vacuum during movement of the closure assembly out of closing relation with the valve member.
  • the apparatus is maintained in this position until the article is evacuated and sealed, whereupon the sealing member is released and returned to the uncompressed position, the closure assembly moves back into closing relation with the valve member and the evacuated article is removed from the apparatus without opening the pumping system to the atmosphere.
  • the combined port and valve assembly comprises a cylindrical metal housing It and a closure assembly I I which combins to define an evacuable chamber I 2.
  • Closure assembly II is provided with a port opening I3 extending therethrough and communicating with chamber I2, port opening I3 being adapted to receive the neck of an article I5 to be evacuated.
  • a stationary valve rod I4 is mounted on housing I 8 inside chamber I2 and extends into closing relation with port opening I3 in closure assembly II.
  • Housing I0 includes at least one exhaust outlet I6 communicating with chamber I2 for evacuating the chamber, housing I!) being adapted to be connected to a vacuum pumping system and preferably being mounted directly on the inlet end of a diffusion pump I!
  • a longitudinally extensible bellows I8 is disposed in chamber I2 and encircle valve member I l.
  • One end of bellows I8 is welded or otherwise secured in vacuum-tight relation to closure assembly H around opening IS.
  • the other end of bellows member I8 is similarly secured in vacuum-tight relation to housing I 0 around valve 1'; member i4 and exhaust outlet I6.
  • Housing I0 preferably comprises a generally tubular side wall 20 and a base plate 2I marginally bolted or otherwise secured together to form a cylindrical housing having an open end.
  • the upper rim of side wall 20 has a plurality of raised portions 22, 22 regularly spaced around the circumference of wall 20 to give the housing ID a toothed marginal profile, each of the raised portions comprising inclined terminal faces 23, 23 slanting upwardly to a generally flat central zone 24 having a lateral groove 25 across its face as illustrated more clearly in Fig. 7.
  • Closure assembly II comprises a metal plate 21 journalled in housing I 0 adjacent the open end thereof, a second plate 28 spaced from the first plate 2'1 and rigidly secured thereto by stud bolt 29, a resilient sealing member 30 of rubber or other suitable resilient material sandwiched be-- tween plates 21 and 28 and adjustable means for compressing sealing member 30. Opening I3 extends through plates 21 and 28 and sealing member 30.
  • is sandwiched between plates 21 and 28 and encircles sealing member 30, ring 3
  • has a sinuous configuration forming a plurality of regularly recurring recesses around the inner circumference of ring 3! with the radial spacing of the recesses corresponding to the spacing of the raised portions 22, 22 on housing I 0.
  • a plurality of incompressible balls such as steel balls 38, 33 are disposed between ring 3
  • Plate 21 has an upstanding annular rib 34 which abuts 3
  • rollers 35. 35 roll on the toothed rim face of housing l9, and are positionedcircumferentially on radii bisecting the inner face 32 of ring 3
  • Member 38 projecting outwardly from one of the rollers 35'forms a bandle for rotating ring 3
  • Collar 40 mountedon the inner face of" the end wall 2
  • projecting outwardly fromplate member 21 into opening 42 in side wall of housing It limits lateral and vertical movement of closure assembly H to a predetermined zone.
  • valve rod It is bored axially to provide at least one back fill conduit 43 through rod 24, the conduit 43 communicating with a conduit 44 bored in base plate 2
  • a suitable conduit tube at is secured to housing l!) in communication with conduits 43 and M for connection with a reservoirof back filling fluid (not shown), tube it being provided with a suitable valve 11.
  • the combined port and valve assembly is connected to a suitable vacuum pumping system.
  • the pumping system usually comprises at least one diffusion pump backed by a mechanical pump.
  • the combined assembly is attached directly to the intake end of a diffusion pump with the exhaust outlet of the combined valve and port assembly communicating directly with the pumping chamber. This direct connection is made possible because of the small air capacity of the port and valve assembly whereby pumping directly into a hot diffusion pump can be successfully effected.
  • valve rod M With the port in the open position as shown in Figs. 1 and 2, the-pumping system can be started immediately and kept in operation continuously.
  • valve rod M seats in opening l3 in sealing member and effectively seals the port.
  • the pumping system evacuates the interior of bellows
  • the apparatus embodying the invention is maintained in the position shown in Figs. 3 and 4- until the article being treated has been evacuated to the desired reduced pressure.
  • the article is then tipped off in accordance with conventional ring 3i rotated until rollers 35, 35 are again on housing iii, during which movement the entire closure assembly is pulled downwardly bythe vacuum until valve rod I l seats in opening I3 and the balls 33, 31% move into the recesses on the inner face of ring 3
  • the dimensions of the various elements of the apparatus embodying the invention are correlated so that, during the movement of the ring from the closed to the open position, the closure assembly drops. down and seats on valve rod Hi before the compression force on sealing member 38' is fully released. At this point, valve i? is opened and back filling fluid enters the evacuated article through back fill conduit t3 in valve rod l4.
  • FIG. 5 An alternate embodiment of the invention parcularly adapted for use on automatic exhausting equipment, such as a multiple head rotary exhaust apparatus, is illustrated in Figs. 5 and 6.
  • is bored at predetermined intervals to provide holes 50, 53 through.
  • of slightly smaller diameter than balls 33, 33.
  • Collar 40 is welded or otherwise secured to plate 21 and is unsecured to base plate 2
  • Collar 4'0 is dimensioned to make sliding contact with the inner wall of housing It] over a larger area than with only plate 21 journalled in housing I0. This imparts additional stability to the assembly during operation and collar 40 still functions to limit downward movement of the closure assembly to a predetermined point.
  • Figs. 5 and 6 operates in substantially the same way as the apparatus shown in Fig. 1 except that compression and decompression of sealing member 36 by balls 33, 33 takes place during a shorter arc of rotation of ring 3
  • Members 5!, 5i successively move into position to engage automatic external actuating means during rotation of ring 30 whereas, in manual operation, only a single handle 38 is necessary as shown in Fig. 2.
  • the assembly embodying the invention can be employed as an individual tube evacuating unit or it can be incorporated in multiple-head processing equipment as described particularly with reference to Figs. 5 and 6. In the latter case, the assembly is desirably actuated mechanically and automatically at predetermined zones or stations during the processing cycle.
  • the invention thus provides a simple, positiveacting assembly combining the functions of an exhausting port and a vacuum valve cooperating mechanically.
  • the assembly is adapted for rapid loading and unloading of articles being treated, and ensures sealing of the article in the port during evacuation.
  • the various elements of the assembly are mechanically correlated to obviate the possibility of opening the pumping system to the atmosphere and permits continuous operation of the vacuum pumping system.
  • a combined port and valve assembly forming an exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including an exhaust outlet for evacuating said chamber, a stationary valve member mounted in said chamber and being arranged for closing said opening in said closure means, extensible bellows means in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing means around said exhaust outlet, said closure means comprising resilient sealing means having said opening extending therethrough, and adjustable means for alternately compressing and releasing said sealing means, and means cooperating with said adjustable means and arranged for moving said closure means out of closing relation with said stationary valve member during compression of said sealing means whereby both said opening and said exhaust outlet are in communication with said chamber when said sealing means is compressed, said closure means being free to move into closing relation with said valve member when said sealing means is uncom
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including at last one exhaust outlet for evacuating said chamber, a stationary valve member mounted on said housing means in said chamber and arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing means around said exhaust outlet and said valve member, said closure means comprising resilient sealing means having said opening extending therethrough, and adjustable means for alternately compressing and releasing said sealing means, said housing means including means cooperating with said adjustable means and arranged for raising said closure means out of closing relation with said valve member during compression of said sealing means, said closure means being movable into closing relation with said valve member when said sealing means is uncompressed.
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted on said housing means in said chamber and arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one nd of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing means around said exhaust outlet and said valve member, said closure means comprising resilient sealing means having said opening extending therethrough and adjustable means encircling said sealing means and mounted for rotation around said sealing means, said adjustable means including means for alternately compressing and releasing said sealing means during rotation of said adjustable means, and means cooperating with said adjustable means for raising said closure means out of sealing relation with said valve member, said means for raising said closure means being constructed and arranged to coact with said adjustable means to raise
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including at least one exhaust outlet for evacuating said chamber, a stationary valve member haust outlet and said valve member,
  • said sealing means said adjustable means including means for alternately compressing and releasing said sealing means in predetermined zones along the path of rotation of said adjustable means
  • said housing means including means: for raising said closure means out of sealing relation with said valve member, said means for raising said closure means comprising spaced apart raised portions on said housing means adjacent said closure means; said raised portions being at predetermined intervals along said housing means in radial alignment with said zones along the path of rotation of said adjustable member wherein said means for compressing said sealing means are operable
  • said adjustable means including means arranged in cooperating relation with said raised portions of saidhousing means and being constructedzto raise said closure means during passageoversaid raised portions.
  • An exhaust head assembly comprising housing means having an open end, closure means for the. open end of said housing means, said housing means and'said closure means forming anevacuable chamber, said closure means havingan' opening therethrough communicating with said chamber and'being adaptedto receive the neckof an article-to be evacuated, said housing-means including at least one exhaust outlet' for'evacuatingsaid chamber, a stationary valve member mounted" in said chamber and arranged to close-the openingin said closure means, extensible bellows means-disposed in saidchamher, andencircling saidivalvemember, one end of said bellows means being secured to said closuremeans around said opening, theother end of said bellows means being secured to said housing around means comprising resilient sealing I means hav in said opening extending therethrough and adjustablemeans encircling: said sealing means and mounted for rotation aroundsaid sealing means, said adjustable means including means for alternately compressing and releasing said sealing means in predetermined :zones alongthe path of rotation of said adjustable means, the rim of said housing at the
  • An exhaust head assembly housingmeans and closure means defining an evacuable chamber, said. closure means having with an opening therethrough communicating said chamber and being adapted toreceive the neck of an article to be evacuated, said housing meansincluding at least one exhaust outlet for evacuating; said chamber, a stationary valve said exhaust outlet, said closure comprising rod mounted on said housing means in said chamber and arranged to close said opening in said closure means, extensible bellows means disposed in said chamber and encircling said valve rod, one end of said bellows means being secured to said closure means around said openmg, the other end of said bellows means being secured to said housing means around said exhaust outlet and said valve rod, said closure means being unsecured to said housing means and movable relative to said housing means, said closure means comprising resilient sealing means having said opening extending therethrough in alignment with said valve rod, and adjustable means encirc s said sealing means and rotatable about said sealing means, said adjustable means includ means for alternately compressing and releasing said sealing means in predetermined zones along the path of rotation
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said. chamber and being adapted to receive the neck of article to be evacuated, said housing means including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted in said chamber and arranged for closing said opening in said closure means, and extensible bellows means-disposed in said chamber encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing means around said exhaust outlet, said closure means comprising resilient sealing means having said opening' extending therethrough, ring means encircling said sealing means and rotatable about said sealing means, pressuretransmitting means positioned between said ring means and said sealing means, and means for limiting movement of said pressure-transmitting means to a direction radial to said sealing-means, said ring means including means spaced around the circumferential extent of said ring means for applying inwardly directed
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including at least one exhaust outlet for evacu-' ating said chamber, a stationary valve member mounted in said chamber and arranged for closing said opening in saidclosuremeans, and ex-' tensible bellows means disposed in said chamberand encircling said valve member, one end oi said bellows means being secured to said closure means around said-opening; the other end of said bellows means being secured to said housof incompressible elements ing means around said exhaust outlet, said closure means comprising resilient sealing means having said opening extending therethrough, ring means encircling said sealing means and rotatable about said sealing means, a plurality disposed between said ring means and said sealing means in spaced apart relation around said sealing means, and confining means arranged for limiting movement of said incompressible elements to a direction radi
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted in said chamber and arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing means around said exhaust outlet, said closure means comprising resilient sealing means having said opening extending therethrough, ring means encircling said sealing means and rotatable about said sealing means, a plurality of incompressible elements disposed between said ring means and said sealing means in spaced apart relation around said sealing means, and confining means arranged for limiting movem nt of said elements to a direction radial to said sealing means, the inner face of said ring means having a sin
  • An exhaust head assembly comprising a housing having an open end, closure means for said open end of said housing, said housing and said closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted on said housing in said chamber and being arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing around said exhaust; outlet, said closure means comprising a plate member journalled in said housing, a second plate member rigidly secured to said first-named plate member in generally parallel spaced-apart relation, resilient sealing means sandwiched between said plate member, said opening in said closure means extending through said plate members and said sealing means, and adjustable means for alternately compressing and releasing said sealing means, said housing including
  • An exhaust head assembly comprising a housing having an open end, closure means for said open end of said housing, said housing and said closure means defining an evacuable chamber, said closure m ans having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted on said housing in said chamber and being arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end 01' said bellows means being secured to said housing around said exhaust outlet, said closure means comprising a plate member journalled in said housing, a second plate member rigidly secured to said first-named plate member in generally parallel spaced-apart relation thereto, resilient sealing means sandwiched between said plate members, said opening in said closure means extending through said plate member and said sealing means, and adjustable means encircling said sealing means and rot
  • An exhaust head assembly comprising a housing having an open end, closure means for said open end of said housing, said housing and said closure means defining an evacuable cham ber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing including at least one exhaust outlet for evacuating said chamber,
  • An exhaust head assembly comprising a housing having an open end, closure means for said open end of said housing, said housing and said closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing including at least one exhaust outlet for evacuating said chamber, a stationary valve member mounted on said housing in said chamber and being arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing around said exhaust outlet, said closure means comprising a plate member journalled in said housing adjacent the open end of said hous ing, a second plate member rigidly secured to said first-named plate member in generally parallel spaced-apart relation thereto, resilient sealing means sandwiched between said plate members, said opening in said closure means extending through said plate members and sealing means, ring means encircling
  • An exhaust head assembly comprising a housing having an open end, closure means for a stationary valve member said open end ofsaid housing, said housing and said closure means defining an evacuable chamber, saidclosure means having an opening'therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing including at least one exhaust outlet for evacuating said chamber, mounted on said housing in said chamber and being arranged for closing said opening in said closure means, and extensible bellows means disposed in said chamber and encircling said valve member, oneend of beilows means being secured to said closure means around said opening, the other end of said bellows means being secured to said housing around said exhaust outlet, said closure means comprising a plate member journalled in said housing adjacent the open end of said housing, a second plate member rigidly secured to said first-named plate member in generally parallel spaced-apart relation thereto, resilient sealing means sandwiched between said plate members, said opening in said closure meansextending through said plate members and said sealing means, ringmeans encircling said
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means having an opening therethrough communicating with said chamber and being adapted to receive the neck of an article to be evacuated, said housing means including an exhaust outlet for evacuating said chamber, a stationary rod-like valve member projecting inwardly from said housing means into closing relation with said opening in said closure means, said valve member having at least one fluid conduit extending longitudinally through said valve member for delivering back fill fluid to said opening, said housing means including a second conduit communicating with said first-named conduit and arranged for connection with a reservoir of back filling fluid, valve means in said second conduit for controlling flow of back fill fluid, extensible bellows means in said chamber and encircling said valve member, one end of said bellows means being secured to said closure means around said opening, the other end of said bellows means around said exhaust outlet, said closure means comprising resilient sealing means having said opening extending therethrough, and adjustable means for alternately compressing and releasing said sea1- ing means, and means cooperating with said
  • An exhaust head assembly formed by a combined port and valve assembly comprising housing means, closure means for said housing means, said closure means including resilient sealing means having a port opening adapted to receive a neck portion of an article to be evacuated, exhaust outlet means for evacuating said housing, valve means in said housing adapted to close said port opening, and mechanically actuated means arranged in mechanically cooperating relation with said sealing means and said valve means and being operable to simultaneously compress said sealing means and open said port opening during a portion of the operating cycle of said assembly and to simultaneously decompress said sealing means and close said port opening during another portion of the operating cycle of said assembly.
  • An exhaust head assembly comprising housing means and closure means defining an evacuable chamber, said closure means including resilient sealing means having a port opening therethrough communicating with said chamber and adapted to receive the neck of an article to be evacuated, exhaust outlet means for evacuating said chamber, ring means encircling said resilient sealing means and arranged for rotation around said sealing means, a plurality of balls disposed between said ring means and said sealing means for compressing said sealing means, a plurality of recessed ball seats at spaced intervals in said ring means for receiving said balls and thereby decompressing said sealing means at predetermined zones along the path oi. rotation of said ring means, and means arranged to coact with said ring means for closing said port opening in said zones wherein said balls are seated in said ball seats and for opening said port opening in the remaining zones in which said balls compress said sealing means.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Vacuum Packaging (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US258772A 1951-11-29 1951-11-29 Exhaust head assembly Expired - Lifetime US2678761A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL87415D NL87415C (enrdf_load_stackoverflow) 1951-11-29
US258772A US2678761A (en) 1951-11-29 1951-11-29 Exhaust head assembly
DEE6388A DE942532C (de) 1951-11-29 1952-11-28 Absaugeverschluss zur Evakuierung von Hohlkoerpern
GB30291/52A GB722303A (en) 1951-11-29 1952-11-28 Improvements in or relating to vacuum chambers and seals therefor

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Application Number Priority Date Filing Date Title
US258772A US2678761A (en) 1951-11-29 1951-11-29 Exhaust head assembly

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US2678761A true US2678761A (en) 1954-05-18

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US258772A Expired - Lifetime US2678761A (en) 1951-11-29 1951-11-29 Exhaust head assembly

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US (1) US2678761A (enrdf_load_stackoverflow)
DE (1) DE942532C (enrdf_load_stackoverflow)
GB (1) GB722303A (enrdf_load_stackoverflow)
NL (1) NL87415C (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2812993A (en) * 1954-08-26 1957-11-12 Western Electric Co Device for preventing seizure of magnetron tuning mechanism
US3029846A (en) * 1959-01-14 1962-04-17 Westinghouse Electric Corp Cap for compression-rubber assembly
US3063478A (en) * 1959-06-30 1962-11-13 Westinghouse Electric Corp Compression-rubber assembly
US4121633A (en) * 1976-10-18 1978-10-24 Jerry Diez Transfer device for heat sensitive material
US4693286A (en) * 1986-06-13 1987-09-15 Rca Corporation Fluid filling apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2031689A5 (enrdf_load_stackoverflow) * 1969-02-04 1970-11-20 Thomson Csf

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025579A (en) * 1934-10-12 1935-12-24 Gen Electric Exhausting and gas-filling machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE263331C (enrdf_load_stackoverflow) *
DE437454C (de) * 1924-10-31 1926-11-25 Patra Patent Treuhand Maschine zur Herstellung elektrischer Gluehlampen und aehnlicher Glasgefaesse
BE333406A (enrdf_load_stackoverflow) * 1925-05-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025579A (en) * 1934-10-12 1935-12-24 Gen Electric Exhausting and gas-filling machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2812993A (en) * 1954-08-26 1957-11-12 Western Electric Co Device for preventing seizure of magnetron tuning mechanism
US3029846A (en) * 1959-01-14 1962-04-17 Westinghouse Electric Corp Cap for compression-rubber assembly
US3063478A (en) * 1959-06-30 1962-11-13 Westinghouse Electric Corp Compression-rubber assembly
US4121633A (en) * 1976-10-18 1978-10-24 Jerry Diez Transfer device for heat sensitive material
US4693286A (en) * 1986-06-13 1987-09-15 Rca Corporation Fluid filling apparatus

Also Published As

Publication number Publication date
NL87415C (enrdf_load_stackoverflow)
GB722303A (en) 1955-01-19
DE942532C (de) 1956-05-03

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