Патент USA US2113798код для вставки
'April 12, 1938. , D. MULLAN ' _ 2,113,798 EXHAUST VALVE FOR LAMP MAKING MACHINES Filed June 27, 1936 ' s Sheets-Sheet 1 INVENTOR ,0. Mall/9 BY. 21¢ .9. ATTORNEY April 12, 1938. 2,1 13,798 D. MULLAN EXHAUST VALVE FOR LAMP MAKING MACHINES .F'iled ‘June 27, 1936 3 Sheets-Sheet 2 29 Jj $57 I IV a INVENTOR April 12, 1938. D. MULL-AN , 2,113,798 EXHAUSTv VALVE FOR LAMP MAKING MACHINES ‘ Filed June 27, 1956 s Sheets-Sheet :5 J3 4 7 ",6; ' ‘ 32 ' 63’ V ’///////A v J4 ‘ ’ ‘33 A \ " > lNVE A TOR‘ _ a MHZ/UV . ATTORN Patented Apr. 12, 1938 I 2,113,798 UNITED STATES ‘PATENT OFFICE EXHAUST VALVE FOR LAMP MAKING ‘ MACHINES ' Daniel Mullan, Kearny, N. .L, assignor, by mesne assignments; to . Westinghouse Electric and , Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania ' Application June 27, 1936, Serial No. 87,702 9‘ Claims. (01. 176-2) This invention relates to machines 'for ex hausting and gas-?lling hollow bodies, and par ticularly to such used for the manufacture of‘ incandescent electric lamps or similar devices. Exhaust machines used in the lamp making in oi ‘dustry usually comprise a rotary conveyor on which a plurality of what are termed exhaust ports are arranged along the periphery of ‘the conveyor. The conveyor is, in fact, a rotary 10 valve including top and bottom valve sections in the form of circular plates. The valve plates are relatively movable and the relative movement of the .plates, by reason of suitable channels and ducts, results in an open15 ing and a closing of vacuum lines to which hollow bodies such as lamp bulbs or the like are con-' 2 valve for an exhaust machine in ‘which multiple valve ports are provided for each device to permit an arrangement whereby such ports may be moved successively into communicationlwith a ‘vacuum line to give a substantially continuous exhausting operation. _ - V I Another object of the invention is to provide a valve arrangement in which asubstantially continuous exhausting operation may be per formed without subjecting the valve members to excessive wear. ‘ 10' ' Other objects and advantages of the invention ‘will be more clearly understood by reference to the following description together with the accompanying drawings in which: - Fig. 1 is a plan view of a machine constructed nected for an exhausting operation. in accordance with the present invention; It will be readily appreciated that under the‘ fFig..2 is a, diagrammatic plan view of the ma continuous operation to which machines of the chine shown in Fig. 1 but showing the arrange abovetype are subjected, the valve sections must ment of the pumps and vacuum lines or mani be so constructed as to operate with a minimum amount ‘of wear, and further that any. con centrated wear on the opposing surfaces of the folds; ' Fig. _3 is a view taken on line III—III in Fig. 1; Fig. 4 is a view' taken on line IV-IV in Fig. 3 , valve sections results in leakage with the con- . looking at the under side‘ of the top valve section; Fig. 5 is, a view taken on line V—V in Fig. 4; 25 sequent failure to produce the desired degree of Fig. 6 is a view taken on line VI—VI in Fig. 3 vacuum. In the operation of an exhaust ma-. chine, a device is exhausted in stages. During looking at the top of the bottom valve section; ' Fig. 7 is a view taken on line VII—VII in Fig. 6; this removal of gas from’ the bulb at each stage, it is necessary for the’ lamp to; be connected 1; Fig. Bis a view taken on line VIII-T-VIII in Fig.v These ports‘ were spaced a selected distance 6; and Fig. 9 is a fragmentary view. showing the rela apart and as this distance was necessarily long to ‘ tive positions of ports in an upper valve section 30 several ports in the valve. . ‘ 30 provide adequate contact for maintaining a seal, and slots in. a lower valve section as one pair of‘ each device was cut oif from ,the pumps for a ports is leaving one slot and moving over another. relatively long period when traveling through a ' I The present invention may be embed. .d in any stage of exhaust. This resulted in a drop in the vacuum in therdevice at each cut-oft period and imposed extra work on the pumps to bring the device to the required vacuum. / , suitable type of exhaust machine such as used for the progressive evacuations qf.~hollow bodies,v and particularly in connection'with electric vacuum devices such as incandescent electric lamps, radio It has been proposed to make the valve sections 40 with elongated slots or ports arranged~ in close tubes, and the like. proximity to reduce the distance of cut-off. ,This expedient, however, reduced the contact area be tween the ports and after continued use slight 45 grooves would wear. between the ports, bringing purpose are usually provided with two pumps; a preliminary exhaust pump,‘ and what is known as a ?nal exhaust pump. The devices to be evacur ated are ?rst connected with the ?rst or prelim ' 40 Exhaust machines , for the ‘above mentioned about a condition which-was detrimental to the ’ inary pump, and exhausted as they travel: that efficient operation of the machine. I , is, they are moved from one port to another while on the preliminary exhaust pump. ‘ ' It is an object of the present invention to pro The same procedure is followed when the de vide an improved form of exhaust valve in which vices are subjected to the second pump or ?nal 50 the time of cut-o? is reduced. Another object of the invention is to provide exhaust. In exhaust machines‘ as heretofore valve plates for an exhaust machine in whichthe constructed, a single row of ports was provided . valve ports are so arranged as to provide a sub stantially continuous exhausting operation. 55 ‘ Another object otthe invention is to provide a and the device moved successively'from one port } to the other. Thusit was necessary to keep the ports separated‘ to maintain an effective seal. 55 2 2,118,798 In accordance with the present invention each An oil trap 40 is provided between the nipple conduit fora device is provided with a plurality and the conduit 42. Each nipple is provided with of ports arranged to communicate with a plurality a cut-off means; comprising a cam 43 ‘movable of slots disposed in two circular rows and in about a pin 44 so that at the proper place during staggered relation. Thus as the conveyor moves movement of the conveyor the cam is operated and the valve is operated, communication is had , to pinch the nipple 4| and close the passage with the pump. During the travel of a device through conduit42, as for example; when the from one port to another, one port is closed while exhaust line is closed and. gas is admitted or with the other is opened, and since the ports may thus drawn from the bulb, or for other purposes. The 10 be widely separated, an effective seal is main tained. ' The invention may be applied to an exhaust '15 machine comprising a conveyor, indicated as a operation is given. Whole by the reference character 9, having a cen tral rotatable hub or shaft l6 on which is mounted a carrier plate or ?ange H suitably fastened to A machine of the present type is usually pro vided with a duplex pump including a prelim the shaft l6 and rotatable therewith. The shaft is provided with a worm wheel i2 and mounted for rotation in bearings l4 and I4’ on a stationary supporting frame or bracket IS. A worm i6 on a shaft I1 is disposed in mesh with worm wheel l2. The shaft I1 is provided with a pulley l8 over which a belt I! leads to a pulley 2| on shaft 22 of a motor 23. This driving mecha 25 nism from the motor provides a continuous drive. It will be understood, however, that an inter mittent operation may be provided if desired by using means such as a Geneva drive which is well 30 opening and closing of the exhaust line by means 10 of pinch cocks is well known in machines of the present type and no detailed description of this known and common practice in connection with Vmachines of the present character. Th present invention may be used with either type of machine and the construction shown has been selected for the purpose of disclosing the advantages of the present invention when applied 35 to a machine in which the work parts are moved continuously to attain high-speed production. In the structure shown, a plurality of what are termed exhaust ports 24 are positioned adjacent to'and in spaced relation around the periphery 40 of the plate ll. Sixteen ports are shown in the ' ‘ 15 inary pump 45 and a ?n’al pump 46. The pump 45 is in communication with pump 46 through conduit 41 and intermediate the pumps is a conduit 48 controlled by valve 49 and leading to a manifold 5| having branch conduits 20 52, 52', 522, 523, and 52*, connected to the valve unit. A leak Sdetector 53 is also connected to the manifold 5i. This leak detector may be of any well-known type and is'not'shown in detail. The pump 46 connects with a manifold 54 25 through conduit 55 which leads to the manifold 54 and is provided with valve 56. This manifold has branch conduits 51, 51', 512, 513, 514, 515, 516, and 57", connected to the valve unit. ‘ During the process of evacuation the bulbs are flushed with gases such as oxygen and nitrogen and when gas lamps are made a ?nal ?lling of argon gas is provided. As shown in Fig. 2, three sources of gas conduits are shown and indicated by the reference characters 56, 59, and 6| con 30 trolled by valves 62, 63, and 64 respectively. The gas conduits supply nitrogen, oxygen, and argon, or any other desired gas or gases. These gases may be fed to the valve unit at different stages 40 drawings although more or less may be employed. of the conveyor, but inasmuch as the present Each port includes a ?exible tube- 26 to receive valve may be used with or without the introduc an exhaust tube 26 of a bulb 21 suitably supported tion of gas in the lamp, further description of the gas flushing or ?lling is deemed unnecessary. in a holder 26. , . As above pointed out, the present valve unit is 45 A bulb holder and an exhaust port is usually 45 termed a head and the heads are as a whole in ' constructed to provide a substantially continuous dicatedsby the reference numeral 29. ._ The heads exhaust operation and at the same time to main are of similar construction and inasmuch as their tain an effective seal between the valve surfaces. This is accomplished by providing the upper structure is well known in the art, it is believed valve section with double ports 65 and 66 con 50 50 that the showing made is sufficient. As the heads move with the conveyor, the supported bulbs are nected by a radial passage 61 leading to con progressively connected to the vacuum pumps by duit 42. The lower valve section is provided with means of a valvev comprising a top section 3| an outer row of slots 68', 682, 6843, 664, 685, and 688., and an inner row of slots 69', 692, 693., 694, 695, and a lower section 321 > .55 ’ These valve sections are in the form of rings ; 696, and 697. The slots of one row are staggered 55 having ?at opposed surfaces 33 and 34 with an interposed oil seal fed through passage 36. The top valve section moves with the shaft III and is secured to the plate H by dowel pins 35. Pres with respect to the slots of the other row and at certain positions the ends of the opposite slots are in close proximity to a. common radial line so that if, for example, port 66 is being moved over the end of a slot the port 65 will be leaving a slot 60 in ?rm relation to the lower section which is - and the distance between adjacent ends of the slots will be slightly smaller than the diameter of held stationary by means of dowel pins 31 extend ilng into the said valve section and into the frame the ports. ‘See Fig. 6 which shows the relative positions of ports 66 and 65 in dotted lines. 65 It will be obvious that the relative positions of 65 As stated, the valve sections which constitute 60 sure springs 36 serve to hold the upper section 5. . , ' a valve' unit, serve to open and close the vacuum ' the ends of the'slots‘with respect to‘a radial line lines to the bulbs supported invthe heads. This valve also serves to admit gas to the bulb, as when a gas-?lled» lamp is made, and/or to admit 70 other gaseswith which the bulbs are ?ushed in the process of exhaust. Each port 24 is pro vided with a T-member 36 connecting a con-v duit 39 to a gas inlet} of the valve and with a rubber nipple 4| and a conduit 42 leading to the 75 valve vacuum inlet. is dependent on the diameter of the ports ‘66 and 65. Thus, as the upper valve section moves,- one of the ports 66 or 65 is over a slot in ‘the lower valve section While the other port is closed. This 70 gives a continuous exhaust operation; ‘avoiding any “dead" or cut-off stages‘. I ' I" The relative positions of upper valve ports and the lower valve slots are shown more clearly in Fig. 9 which is diagrammatic. It will be noted 75 3 2,118,798 that the slots and ports are disposed in what may be termed different concentric circles X, X’,_ and are so arranged that a row'of ports moves Thus the operation of exhausting'may be‘con-JY' tinuous'. - As above pointed out, the presentmachine pro- I vides a valve unit which operates to expedite pro duction by avoiding any stationary periods and one port is on a circle concentric with that of ‘ at the same time the valve unit has the advantage the other port, the centers of both ports being of providing an effective seal’at all times wheth disposed on a common radial line Y. As'shown, er operating as an intermittent or a continuous over a row of slots. Each pair. of , ports lead- . ing from an exhaust head is arranged so that the slots are so arranged that as a port moves from the end of one slot, another port is moving into communication with another slot. The ad jacent ends of the, slots are thus positioned so that the exhaust head is in continual communi machine. , , . . Although a preferred embodiment of the inven 10 tion is shown and described herein, it is to be understood .that modi?cations may be made therein without departing from the spirit vand scope of the invention as set- forth in the an _ pended claims. cation with the pump during a predetermined movement of the valve. With this arrangement of ports and slots, it is possible to maintain an effective seal since the contacting area of the valve sections between the ports and slots is 1.' A valve unit for an exhaust machine for hol low bodies comprising an upper rotary valve sec relatively large. tion havinga flat surface and a‘lower stationary ‘ Although the valve slots may be arranged to overlap to such an extent'that the exhaust op eration is continuous, it will be evident that, if desired, 'the slots may be so arranged that the bulb may be cut-off from the pump for a brief period by a variation in the arrangement of the ports and slots. , ‘ I claim: valve section having a ?at surface, said ?at sur said upper surface disposed on a common radial line and in spaced relation, means connecting said spaced ports together ‘for simultaneous con nection to a hollow body to be exhausted, arou 25 ate valve slots in said lower valve surface ar ranged to register with said ports, one of said slots being arranged to move into register with port at A. The conveyor then moves and the one of ‘said ports when another slot moves out of . bulb is connected. to the preliminary pump 45 ‘through slots 69', 6.8’, 692, (see Figs. 2 and 6) and is also connected through slot 693 with the final register with another ‘port. noted. these slots are positioned as above ex plained and the exhausting operation is continu ous. In accordance with the present construc tion, a leak detector 10 is provided between slots 692 and 693. ' After the ?rst stage of the preliminary exhaust and the above mentioned short-period connec tion to the ?nal pump, the conveyor moves the bulb over an inlet 10' for a gas ?lling and at slot ' 882 the gas is removed. During movement over 20 faces being disposed in contact, valve ports in As will be noted from‘ the drawings (see Fig. 1), the bulb is loaded or‘inserted. into an exhaust pump. The slots 69', 68' and 682 constitute the preliminary exhaust at this stage and, as will be 15. ' ' 30 2. A valve unit for an exhaust machine for hol low bodies- comprising an upper valve section having a ?at face, a lower valve section having a ?at face, means for supporting said sections with said faces in ‘contacting relation, means for 35 effecting a relative rotary movement between said sections about a common axial line, one of said faces having‘ a plurality of ports arranged in spaced relation along a common radial line, the other face having a plurality of slots positioned 40 on different concentric circles, said slots being so arranged that as the valve sections move rel atively, one port is moved into communication with a slot as another port moves out of com slots 69‘, B83, and 695, the bulb is connected to the ?nal pump. At 102 the bulb may again be'?ushed munication with a slot, and means connecting 45 said ports so that the-exhaustlngoperatioh of a with gas and the gas removed through slot 684 hollow body will be continuous during, said move- , which slot connects with'the ?rst or preliminary ment. Pump- . ' . ' ‘ 3. A machine for exhausting. a hollow body ' The ?nal exhaust is obtained by a movement comprising a rotary conveyona head on said con 50 of the-bulb over slots 696,‘ 685, and 69'! and a ?nal . veyor having an exhaust port, means for making relatively long slot -68“.- The close relation of the a gas-‘tight connection between said port and a portion of. the hollow body. a rotary valve mount- _ exhaust slots and- when the lamp reaches the ?nal . 'ed on the-axis .of said conveyor, said valve having 55 exhaust it may be ?lled with a gas at 1.03 if the > an upper valve section rotatable with said con lamp is to be gas-?lled. _ . veyor and a lower stationary valve section, ‘said slots as above explained, is followed with the ?nal When the lamp has reached its ?nal exhaust ing position B, it is tipped or sealed-off by any valve sections having, contacting surfaces, a plu rality of valve ports in ,the surface of the upper and owned by the-assignee of the present appli .moves from register with .a slot-another‘ port moves into register with another slot to‘produce a continuous exhaust operation while providing su?icient contact area between said surfaces to suitable mechanismsuch as a tipping torch of valve section disposed on a common radial line 60 in spaced relation, slots in the surface of the any well known type. The mechanism for hp lower valve section, one of said slots being ar- ' a ping off shown in'the present drawings is more ' ranged to .‘register- with one of said valve ports clearly shown in copending application Ser. No. during a movement “of said upper valve section, 37,111, ?led August 21, 1935, by M. E.,McGowan , said slots being so positioned that as one port cation. With the mechanism shown, the ex haust tube is heated as it moves betweenv ?res 15. A portion of the exhaust tube is softened and is then moved between rotary disks‘ ‘l6 and 11 which compress the softened portion and seal the bulb. When the conveyor reaches station 0, the bulb is lifted from the conveyor'and ?res ‘l8 melt off the excess portion of the tube. maintain a seal between the valve sections. 4. A machine for exhausting a hollow body, 70 having a tubular extension, comprising a rotary : conveyor, a head mounted on said conveyor, an ex- ' haust port for receiving said extension, a rotary , The above described mechanism serves to seal - valve unit mounted on the axis of said conveyor,v > ‘ the bulb while his moving with the conveyor. _ said valve unit having an upper valve section and 75 £4 2,118,798 ,a-lower valve section, one of said sections being prising ,a rotary conveyor, an exhaust head rotatable with said conveyor, said upper‘valve section having passages, said lower valve section having passages, the passages in the respective sections being so positioned as to register during mounted on said conveyor, a valve unit including an upper rotary disk valve section and a lower stationary disk valve section, said sections hav ing ?at surfaces in contacting relation, means for relative movement of said sections, a conduit connecting said exhaust port to the passages in moving said upper section with said conveyor, an said upper valve ‘section, gas removal means, means for connecting the passages in the lower tube of a bulb, a conduit leading from said ex haust port to said upper section, a pair of ports in the surface of said upper section, a passage 10 leading from said ports to said conduit, an ex haust pump, a conduit leading from said pump to said lower section, a pair of slots in the sur face of said lower section, a passage leading from said slots to said last mentioned conduit, said 15 ports and said slots being so positioned that con tinuous communication is had between the upper and the lower sections during a movement of the upper section for a predetermined part of its ro 10 section with said gas‘ removal means, the oas sages in said sections being so arranged that dur ing relative movement of the sections the pas sages in the respective sections are brought into register, the positions of the registering passages 15 being such that one pair of opposing passages do not move completely out of register until another pair of opposing passages have moved partly into register. _ 5. An exhaust machine for lamp bulbs com 20 prising a rotary conveyor, an exhaust 'head mounted on said conveyor, a valve unit includ exhaust port in said head to receive an exhaust tary movement, the communication being ?rst be 20 tween one port and one slot, and then between ing an upper rotary disk valve section and a low- ' the other port and the other slot. er stationary disk valve section, said sections hav 8. An exhaust machine comprising means for ing ?at surfaces in contacting relation, means for supporting a hollow body, a rotatable valve sec 25 moving said upper section with said conveyor, an tion and a stationary valve section, said sections 25 exhaust port in said head to receive .an exhaust having surfaces in opposed relation, ports in ra tube of a bulb, a conduit leading from said ex dially spaced relation in the surface of said ro haust port to said upper section, a pair of ports tatable section, a conduit connecting said ports in the surface of said upper section, a passage with the interior of said body, slots in the surface 30 leading from ‘said ports to said conduit, an ex of said stationary valve section, an exhaust 30 haust pump, a conduit leading from said pump pump, a conduit connecting said slots with said ‘to said lower section, a pair of slots in the sur pump, said ports and slots being so arranged that, face of said lower section, a passage leading from during a movement of said ‘rotatable section a said slots to said last mentioned conduit, said predetermined distance, ?rst one of said ports is 35 ports and slots being so positioned that as the in communication with one of said slots, and 35 upper section moves a port is brought into regis- ' then the other of said ports is in communication try with one slot as another port moves out of with the other of said slots. registry with another slot. 9. An exhaust machine for lamp bulbs includ 6. An exhaust machine for lamp bulbs com ing a valve comprising an upper member having a ?at lower surface, and a lower member having 40 40 prising a rotary conveyor, an exhaust head mounted on said conveyor, a valve unit includ a. ?at upper surface‘ one of said members being ing an upper rotary disk valve section and a rotatable with respe to the other, said surfaces lower stationary disk valve section, said sections being in contact, one of said members having having ?at surfaces in contacting relation, means arcuate slots spaced circumferentialiy around its ?at surface and staggered alternately on cir 45 for moving said upper section with, and about the axis of rotation of, said conveyor, an exhaust cles of different radii concentric with the axis port in said head to receive an exhaust tube of a ‘ of rotation of said rotatable member, said other bulb, a conduit leading from said exhaust port member having ports opening on its ?at vsurface, to said upper section, a pair of radially spaced arranged in pairs, and spaced from said axis of rotation distances corresponding, respectively, 50 ports in the surface of said upper section, a pas sage leading from said ports to said conduit, an wzth the radii of said concentric circles, so that exhaust pump, a conduit leading from said pump the inner ports intermittently connect with said to said lower section; a pair of slots in the surface inner arcuate slots, and at other times the outer of said lower section and disposed at- different ports intermittently connect with said outer ar cuate slots, means connecting said slots to ex 55 distances from said axis of rotation, a passage ‘leading from said slots to said last mentioned haust mechanism, and means connecting said conduit, said ports being positioned to span the radial distance between said slots, and the latter so located that as the edge of one ,port moves 60 over the edge of one slot and into registry with the slot the other port moves over the edge of and out of registry with another slot. 7. An exhaust machine for lamp bulbs com pairs of radially spaced ports together and to lamp bulbs to be evacuated, whereby said bulbs are alternately connected to said mechanism through the inner and outer ports and arcuate 60 slots with which they communicate, in order to improve the exhausting operation. DANIEL MULLAN.