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Nov‘. 26; 1946. ' 2,411,701 T, G, wElHs APPARATUS FOR MANUFACTURING TEMPERED GLASS Original Filed Aug. 7, 1940 - 4 Sheets-Sheet 1 INVENTOR 7776040!’ 6 We [/75 javgwqmd a” Nov. 26, 1946. 2,411,701 T‘. G. WElHS _ APPARATUS FOR MANUFACTURING TEMPERED GLASS Original Filed Aug. 7, 1940 LI 4 Sheets-Sheet 2 E. , QQ v.N \ \. . 1.v 11 ' ' a“. INVENTOR Theodor é?/el'h-s‘ NOV- 26, 1945- 2,411,701 T. G. WEI-HS ' APPARATUS FOR MANUFACTURING TEMPERED GLASS Original Filed Aug. 7, 1940 4 Sheets-Sheet 3 a? (lik E v) @ _ ma @1Q$H4Ww.I‘J¢.Am o @ \\ \ 1QQE Emil, I INVENTOR QM. - Q Theodor GJVe 1775 6%”? Nov. 26, 1946. ' T. G. WEIHS ‘ ‘ 2,411,701 APPARATUS FOR MANUFACTURING TEMPERED GLASS Original Filled Aug. 7, 1940 ‘ 4 Sheets-Sheet 4 I157. 6. ' INVENTOR ' TheodorGWei/zs " WM Patented Nov. 26, 1946 ‘ , 2,411,701 _ UNITED 'ISTAT ES PATENT _»ol=ncs ‘ 2,411,701 APPARATUS FOR MANUFACTURING __ g,‘ ' 'IY‘EMPERED GLASS‘ - _ I :Theodor G. Weihs, now byjiu?icial change of ' name Theodore ‘G. White,» Pittsburgh, Pa., as . ,signor to ‘American Window Glass Company, “ .. Pittsburgh, Pa., a corporation of Pennsylvania ' i fl0riginal application August 7, '1940,'Serial No. 7 I 351,757. ‘ Divided and this application‘ Septem ber 17, 1941, Serial’No. 411,137 7 Y' 10 Claims. (Cl.v 49%45) 1 .} ‘The present inventionvrelatesto tempered or " of objectionable ‘iridescent spots and it can be manufactured. quickly, e?oiently and ' econom r V _ As is well known in the glass art, tempered or case ‘hardened glass is notjordinary annealed glass e-buteis'glasswhich has‘ been heated to a 2 acter. qrInr addition, the‘ glass manufactured in accordance with'my invention is relatively free my copending application Serial No. 351,757, ?led = V into innumerable small pieces of suitable char-e improved apparatus for frnanufacturing such ‘glass.’ The present application is a division of a - processes and which, upon fragmentation, breaks case hardened'glass and more particularly to an August .7, 1940., . er than'that obtained by the presently known ' ,ically. v t [In accordance with my invention the glass sheet to be temperedis heated to a temperature near temperature approximating the softening point the softening point of the glass and is then quick ly cooledby’blowing a gaseous cooling medium against both faces thereof, the, gaseous cooling of the glass and then suddenly chilled or-cooled sov as to place the interior of’ the glass under ten sion and the exterior portion thereof under ‘com pression. - When properly tempered in this man medium'being blown against the faces of the her the glass, when fractured, does not break intolarge pieces but shatters into innumerable manner that the intensity with which eachstream _ glass sheets in a plurality-vv of streams, ‘and in such impinges upon a face ofthe glass sheet is alter small fragments having rounded edges so, that nately increased’ and decreased. In addition, as there is‘little: chance of any serious injury being will be pointed out more fully hereinafter, in in?icted upon a person who comes into contact with such: fragments. Tempering of this char 20 carrying out my invention, I preferably increase the intensity with which. a plurality of the streams acter'also very materially increases the mechan I impinge upon each face of the glass sheet and icalstrength of. the glass: so that it resists with at‘ the same time decrease the intensity with ' out fracturing very substantial-impacts. which "the 'adiacentjstreams impingeupon the .: _.Someofthemethods‘of tempering glass which faces of the glass sheets and alternately increase 25 have been used'heretofore have resulted in'prod .and decreasethe intensity of each of these-sets ucts having greatmechanical strength and which Vofstreams periodically during the cooling of the when fractured break into the desirable small sheet. After'the sheet has been cooled inthis pieces I but ‘considerable difficulty ‘has, ‘been en countered in such processes "dueto the formation ' manner to‘ a sufficient extent to permit handling of iridescent; spots in the glass, Such spotsare 30 thereof, the glass sheet is then removed from the supporting mechanism and is ready-for use or objectionable as they can beiseen' by the naked .eye if the glass is viewed?t various angles. , Such ‘testing.’ a , A. ~_ 7 In the accompanying drawings I have shown ;fspotsl_al_soiare quite apparent when the sheets for-purposes of illustration only; apreferred'em are _ examined‘; under polarized light. Such oh I jectionable iridescent spots areparticularly ap.-,~ 35 ‘bodiment of my invention and a slightly modified form of apparatus." In the drawings, parent in glass sheets which. have beenpmanufac-é _ ~_ture_d lay a tempering process involving the-blow Figure l} is a sideelevational view of the ap paratus which maygbeused in carrying out my ;in ,. fair or some other suitable gaseousmedium invention; directly _ againstwthe glass sheet by; , means, , of - a I‘ j ‘~ J; ‘ V > plurality of spaced nozzles." They are not 'Vpar 40' Figure 2 .is a partial ‘plan view’ of the cooling .apparatusshown in Figure 1, some of the parts ticularlyprevalent, ‘howevenwhere such glass is being broken awayiionclarityyw A , . manufactured ; by an, immersion process, that is, . 'Figure'3 is afront elevational view. of one of ,bya process in whichthe glass sheet isheated toya point in the vicinity. of the softening point the cooling headers and the nozzles or pipes co -.3a1'ld.: then} immersed in‘: a suitable ‘chilling, liquid.’ .45 operating therewithy, . However,‘ ' glass made; by immersion‘ processes isfactory frornrrthe?standpoint of thecharacter of ' glass sheet; the break obtained when, shattered. ; Nor: has 'standpqint of mechanical strength;'nvention, 7 v ‘I .-;In accordance .with the present provide ;. an . apparatus ‘for, . manufacturing tem - pered'glasstwhich results'l'in ga'jproduct. having ~mechanicalzstrength at least .asgreat as or great ~ ‘of the driving mechanism for reciprocating the tubes through‘which thegas is blown onto the known heretofore .has not beentparticularly sat ,- such glass been particularly satisfactory from the. ' Figure4 is a sectional view through a portion .750 ' ' Figure 5 is a partial sectional view, showing a connection between one “of. the tubes and the driving ‘mechanismyand . I ; ’ I’ Figure 6 is‘ a view- similar to Figure 2 showing ’ a modi?ed form of apparatuswhich may be used 55 for tempering curved‘glass sheets. , 3 In the embodiment shown in the drawings, the as it was in the ?rst furnace and the temperature glass sheet S is ?rst heated in the heating fur nace 2 and is then transferred to and brought up to the desired temperature in the heating furnace 3. The furnaces 2 and 3 are positioned thereof is raised to approximately the softening point of the glass. Where glass sheets of the vertically above the cooling apparatus designated generally by the reference character a and are supported on the vertically extending frame 5. The furnace 2 is provided with a longitudinally extending slot in the top wall 6 thereof and a longitudinally extending slot in the bottom wall ‘I thereof. The slot in the top wall is normally covered by doors or closures 8 and 9 which are slidable toward and away from each other in order to close or open the slot. These doors may compositions customarily used in the trade are employed, I have found that a sheet temperature of approximately 1100° to 1200° is entirely satis ' ' factory. Thereafter the glass sheet is removed from the furnace 3 and lowered to a position be tween the headers of the cooling apparatus indi 10 cated generally by the reference character ll. The cooling mechanism consists of a header 5e1located on one'side of the glass sheet when it is in position to be cooled and a similar header 5! located on the opposite side. As the two headersiand the'mechanism cooperating there with are identical, only one will be described be operated by any suitable mechanism such as by the pivoted rods l5, 1! l and I2 which are rocked herein. . > on their pivots by a rod l3 movable vertically by The header 56 is rectangular in general con a pivotally mounted operating lever Hi. The bot ?guration but may be of any suitable shape de tom slot or opening of the furnace 2 is likewise 20 pending upc-n the con?guration of the glass sheets . normally closed by doors I5 and I6‘ which are to be cooled thereby. The rear endof the header moved to open or closed position through a series of pivotally mounted rods similar to those just described with respect to the upper doors 3 and 9. These rods may be connected'to the same operating handle M by means of a link I‘! so that the two sets of doors or closures maybe operated simultaneously. ~ The bottom furnace or heating chamber 3 is likewise provided with a longitudinally extending slot in the top wall l8 thereof and a bottom lon gitudinally extending slot in the bottom wall Iii. The slot in the upper wall I8 is normally closed by doors 25 and 21 and the slot in the bottom wall is is normally closed by doors 22 and 25. By means of appropriate linkage such as that previously described in connection with the ?rst heating chamber 2, these doors may be opened or closed simultaneously by means of a pivotally mounted operating handle 24. The glass sheet to be tempered is suitably sup ported for movement through-said heating cham bers and into position between the headers of the cooling mechanism described hereinafter. The glass sheet S is moved vertically through the heating chambers and into appropriate position between the two headers of the cooling appa ratus by metallic straps 32.‘ The straps 32 are of appropriate length to permit the lowering of the glass through the two heating furnaces and into position between the cooling headers. These straps 32 extend around rotatable wheels 36 suit ably mounted in bearings 31 carried by the frame 5 at the top thereof‘. The wheels35 are rotated by a crank 55 in the embodiment shown in'the1 drawings, but it will-‘be apparent thatjappropriate mechanism a can be provided .for automatically raising andlowering theglass. In the embodi 55 is connected to the blower 52 for blowing cool air through the header and against the glass sheet S. The front end of the header 55, that is; the end closest the glass sheet, is provided with a closure plate 53 having a plurality of holes 54 therein for receiving and partially supporting one end of the tubes ornozzles 55. This plate 53 is welded'or otherwise suitably secured to the 30 front end of the header 50. ‘Adjacent each of the four corners of the header a rotatable shaft 55 is mounted in suitable bearings 51 and 58 car ried by the frame 59. These shafts‘ are also par‘ tially supported by bearings 59a carried by the plate 53. The front end of each shaft-56 extends through the bearing 58 and has keyed thereto a sprocket tilv having teeth thereon for cooper ating with a'chain 6 I for driving the shafts. The chain 6| extends'around all four sprockets and'also over a sprocket 62- carried by the shaft 63 of a driving motor 64 which is mounted on a bracket 65' carried by the frame 59. The motor and chain are used for driving the‘shafts 56 which in turn, ‘through the mechanism'about to - be describedrecip'rocate the tubes 55 alternately toward and away from the glass sheet to be cooled. I , ~ ‘ Each shaft 56 isprovided with two threaded sections, the one section '66 being threaded in one direction and the‘ section 61 l-being‘threaded in the reverse direction. I The threaded sections?? of the shafts 55 are utilized for reciprocating one group of the tubes or nozzles‘ 55 and the threaded ‘section 6'! is “utilized forireciprocating- another group of the nozzles toward ‘and away from the glass sheet} An internally threaded nut or block 68 is threaded on the section 61 of each shaft '56. A transversely extending plate 15 is-‘secured ment shown in the drawings, the wheels 36 can to the block or nut 68» by- mean-ST of anut 10 be stopped at any suitable point. by means of pins 60 which is ‘threaded on» a reducedend section ll which may be placed in holes 39 positioned around ‘of the nut 68. The plate 15 is provided with an the periphery of each wheel. ‘opening 12 which is suf?cie'ntly large to permit In operation, the glass sheet is first lowered the plate to be placed in position over the reduced into the upper furnace. This furnacev is pro and threaded end section ‘H 10f nut 68.I The vided with suitable electrical’ heating elements plate ‘l5 isla'lso provided with a plurality ‘of holes and. the glass sheet is permitted to remain there for receiving the nozzles or tubes 55. These noz in for a. su?icient period of time to raise the tem zles or tubes extend through the openings in the perature thereof to approximately 900°. This, plate 15 andsome of: them‘ are appropriately ‘se under normal conditions, requires a period of ap " cured- to the plate 15 so‘that as the plateis moved proximately 21/2 ‘minutes where a glass sheet of 70 rearwardly and forwardly by the nuts 68‘and the e‘g-inch thickness is employed. Thereafter the shafts 55 these tubes will be ‘alternately moved doors of the furnaces are opened and the glass toward and away‘from the glass sheet. ‘Alternate sheet S is lowered into the heating furnace 3. "tubes-in each horizontal row are secured to the Y "The glass sheet is permitted to remain in this ‘plate 15 by collars 'llpositione'dQ on eitherside furnace for substantially the-same length of time thereof. jThesec collars-‘l3 are secured. ‘in-appro 2,411,701: therefrom, particularly whenxin the, advanced pria'tel’position on the‘ ‘tubes'55 ‘against the plate. position; strikeslare‘as between the various nozzles 15‘ byset- screws 14. ‘A 'platej69 “similar to the tubes which. are not connected to the .plate .15. or tubes 55 on theother side of the glass sheet. I have’ found that it‘is, undesirable to have the Nuts. 16 which areinternallythreaded for coop.-. symmetrically and consequently preferably vpar-i plate 's'l5zisprovided for cooperation‘ with the tubes on opposite sides of the glass sheet arranged station with ‘the .threaded’ sections '66: ;of._the shafts 56' are provided ‘for moving the plate .69. range. mine in the manner stated above and shown in the drawings. Thetzplate 69,=is.se,cur'ed tothesenuts 1.6 inthe - above is primarily for The. apparatus described samegmannerasthe .plate 15 is secured to the ?at glass sheets. ,However, it can be nuts, 68.. The plate»_69:has_a plurality of, holes 10 tempering used for tempering curved'sheets of glass of any. extending therethrough. for receiving the. nozzles desired curvature by modifying it slightly.v In‘ or tubes_55. . The tubes‘ 55 which are not‘ secured Figure 6 I have illustrated the structure when to, theplate' 15 are secured to and movable .with modi?edin such a way as torender it suitable the plate; 69, by means _of, collars ,1? which, are see; for tempering curved glass sheets. As shown in cured to the tubesin- the samemanneras the col Figure 6, the tubes or nozzles 85 are arranged sothat theends thereof adjacent the glass sheet larsl3are jjIij will be, securedto apparentthetubes. fromthe above, . ' .7 description 1. S’ are in curved planes, parallel vto the curved of .thetubes and the driving mechanism that plane of the sheet S’; In order to arrange the when‘the shafts 56. are rotated in one direction tubes or nozzles 85 in this manner it is merely bynthemotor? thenuts 16,,the plate 5,9,~ and the 20 necessary to slide them forwardly or rearwardly through the collars and the holes in the’ closure plate for the forward end of the header- In or der to do this it is merely necessary to loosen the set screws which fasten the collars to the tubes. When arranged in this manner each tubesrrigidly connected thereto will be moved-in one directionandthe nuts 68, the plate 15,.and the 11111065155 rigidly connected thereto .will be moved in the reverse direction-dueto. the fact thatthe nuts 68 and 16 are on oppositely, thread-. ed sections of the Shafts 56. It will alsonbe ap parent that when the motor 64 is reversed theidi rection of rotation of the shafts 56 is reversed and the plates 69 and715 and the tubes connected thereto are moved in the opposite directions. nozzle or tube in each group or set on each side of the glass sheet is positioned exactly the same distance away from the curved glass sheetbee 30 of," the tubes in any particular direction limit switches 80 and 8! arexappropriately positioned 9X17. ilh?frame 59;v The‘ limit switch 80 .is provided with anvarm 82 which ‘is arranged to bemoved by; the, plate 15 when it has been moved to its rear‘position. The limit switch ._.8I~.i_s :provided with a similar arm 83 which cooperates with the plate 69. when it_is moved .to its rear- position. In/Figure 2:t_he plate .69and the tubescooperat ing therewithijare'shown in advanced‘ position and the plate 15 and the tubes connected thereto are shown in retractedposition. - :, . g I ;_ Appropriate electricalhmechanism is provided forv reversing the motor 64 at the desired time. The particular electrical mechanism employed ‘for reversingvthe‘motor .64 forms no part of the ing tempered as each other tube in the same set or group. H In order to control the extent of themovement - . ., -, - Inthis embodiment of the invention, the tubes are reciprocated in the same manner as the tubes 35 of the embodiment illustrated in Figures 1 to 5 inclusive, and consequently the apparatus em ployed .for effecting the reciprocation of the tubes in this embodiment will not be specifically: de scribed herein. . . 1 . > . . I In the operation of the structure disclosed in the. drawings the glass sheet to be tempered is ?rst. heated to approximately 900° F. in the in itial heating furnace. It is then moved to the second heating furnace where it is heated to a temperature near the softening point. Each of these heating operations requires approximately 2% minutes where glass sheets approximately 1% inch in thickness are used. It will be apparent thatiwhere glass of other thicknesses is used, the heating time may be increased or decreased. For ically shown herein and will not be described. where glass of 1/ii” thickness is used ‘It’ will suffice togstate that when ‘the plate 15 50 example, I have found that the heating time is preferably present invention andconsequently is not specif comes in contact-with thB_..arm 82¢:of the;limit switch 80 the supply of current ‘tothe motor,“ is?iiliterruptedand, the tubes will remain inthe position shown-Vin’ Figure ‘2 for’ ashort period. of time, jwhereuponthe motor 64 is resenergized .for rotation in the ‘reverse direction. . The plate 15 then moved forwardly and the plate 69 .rear yvardly. When the plate .69, comes in contact with thearm 83 of the limit'switch Bl thegcurrent supply/to the motor Miscinterruptedandmove ment of thetubes ceases until the;motorj64gis .again- energized for rotation in the reversedirec .tion. ,This reversal of thomotor andsthetime interval between its rotation in onedirection and its rotation in the otherdirectionycan be appro priately 7 controlled and regulated.‘ by relays; and other. electrical mechanism, well known in the art. »; ~As. stated above, the header 5| and, the coop erating mechanism are “similar. to,‘ the header; 56 a?éliits cooperating, mechanism- sine tubes. -85 about 2 minutes and 40 seconds. After the heat ing of the'glass sheet has been completed it- is positioned between the two headersand the ‘cool— ing operation carriedoutby means of the appa- ' ratus described above. I V. . - r » . I.have found that any suitable number of tubes or nozzles may be utilized on each side of the glass sheet. In the embodiment shown inthe drawings there are 285 tubes on each side of the glasssheet and'these tubes are?; inch in di ameter and spaced apart 11-3.?" from~center1to .center. I have found that this spacing of the nozzles 'givesbest results.-_ . ‘ ' v I > - In the embodiment shown in the drawings; the tubes adjacent each face‘of the glass sheet are divided into two sets. One'set of tubes on each 'side‘is retracted from theiadvanced position to the rear position asthe'other set-is being ad 70 vanced from the rear position to the advanced which cooperate with the header 5| are recipro position. It will be apparent however, that tin--v cated forwardly and rearwardlyin the same man ,der some circumstances it may be desirable to ‘dividethe. tubes into more than two sets; lI ?nd, :ner' asses tubesi55. These tubes 85 however-pare lot ; positioned fdir'ectly jopposite the tube-s ,. 55. _._-fl;hey ._a1f€.-_:.PQSi.'QiQned;§0_ that, the ;air ‘discharged however, that best results can be, obtained where 75 thetubes are arranged inthe manner-shown-in 2,41 1,701; 7 8. the embodiments illustrated in the drawings and sheet to be tempered, means including a header where aIte-rnate‘tubes in each horizontal. and Vera tieal line are reciprocated together. By this‘ era rangement when any particular tube is in ad-' vanced position the tubes adjacent thereto are in retracted position. This arrangement is ad-‘ communicating with one end of each of said tubes for forcing a‘ cooling ?uid through said tubes and against one face of the glass sheet, and actuating means including automatically reversible means connected‘ with said tubes for alternately moving vantageous as it assists in the escape of the gas the tubes toward and away from the glass sheet repeatedly‘ during’ the tempering operation, from the space adjacent the glass sheet and 1121-‘ less provision is made for getting rid of the gases whereby the intensity with which the cooling ?uid in some manner or other, di?iculty is encountered 10 from: each of said tubesv impinges upon the glass in obtaining proper cooling and proper breaking characteristics in the ?nished product. The position of the tubes with respect to the glass sheet is of considerable importance. I ?nd sheet is» automatically increased ‘and decreased. 2.. Apparatus" for use in the manufacture of tempered glass comprising a plurality or open ended tubes; supporting means for supporting the that best results can be obtained when. the‘ tubes 15 tubes;v with one end of each adjacent the glass are so positioned that in their advanced position sheet to be tempered, means: including a header the ends thereof will be approximately 1” from communicating with the other end; of each of said the glass sheet.v rI'he stroke of each tube also is tubes for forcing a‘ cooling fluid through the’ tubes important. I ?nd that a stroke of approximately and: against one face of the glass: sheet; and- ac‘ 1%” gives best results in apparatus such as 20 tuating means‘ including a reversible electric‘ mo that described above. tor andat least one limit switch for automatical The air pressure employed is also of consider l'y' moving the tubes toward and away from the able importance.’ In the apparatus described glass sheet‘ repeatedly duringv the tempering op above, I ?nd that an air pressure of approxi eration, whereby the intensity‘ with which the mately 6.6" of Water measured at the outlet end 25 cooling ?ui'd' from each of- said-tubes impinges of each tube gives best results. upon the‘ glass‘ sheet is automatically‘ increased In the operation of this apparatus I have found and‘ decreased‘. that an increase in the air pressure reduces 3.‘v Apparatus for use in'v the manufacture of iridescence. This is directly contrary tov the re sults achieved where stationary nozzles are em ployed. Where stationary nozzles are employed and the air pressure is increased, iridescence is materially increased. I believe that this unusual phenomena is caused by the fact that when‘ the air pressure is reduced the streams of gas come ing from the-tubes which are in retracted position have very little effect upon the‘ glass and upon the air coming from the advanced tubes andthat consequently there is not a proper distribution of the air throughout the area of the glass sheet. Another unusual phenomena which I have‘ ex perienced with the apparatus and method which I provide is that when the nozzles or tubes are arranged so as to increase the distance between’ the glass sheet and the nozzles when in advanced positioniridescence is increased. This is directly contrary to what happens where- stationary noz zles are‘used. Where stationary nozzles are sin-' ployed a decrease in the distance between the 30 tempered: glass" comprising a plurality of open‘ ended tubes‘,- supporting means for said‘ tubes with one end of each- adjacent a face of a-glass sheet tube-tempered; means communicating-with the‘ other end of each of said tubes for blowing a cooling: ?uid through the tubes and against the adjacent face or the glass sheet,‘ andactuat ing meansv including automatically I reversible means‘ connected ‘with? said! tubes for? moving some of the" tubes adjacent each face of the glass 40 sheet toward the sheet whoa at thesame time, moving the remainder of the tubes adjacent each face; ofthe'sheet away from the sheet. 4'.v Apparatus for‘ use in- the manufacture of tempered glass comprising a plurality of open ended tubes adjacenteachraceof the‘ glass sheet to‘ be tempered,- supporting means for said" tubes, means communicating with said tubes-for blow in‘g a/coolingifluid' through- each of-said-tubes and against a:- fade of theg'las’sf sheet; means connected with'each of said tubesrcr moving apart of the glass and the nozzles increases iridescence' and - ; tu-besad'jacent each face of the glasssheet toward an increase in the distance reduces it. I have found that the rate of reciprocation of the various nozzles can be varied‘ over‘ av wide range. In-the apparatus disclosed‘ in the draw ings and described above, I prefer to‘ reciprocate the nozzles approximately 20 to 30‘tim‘espermin ute although this rate of reciprocation can be very greatly increased‘ or decreased to‘suit the op‘ erating conditions encountered. theish'eet while, at the" same time, moving‘ the re mainingtub'esi» adjacent each face of the glass sheet away from thesheet, and‘ means ope'ratively connected;~ with‘ said last mentioned?- means- for , » automatically reversing the direction of‘v move ment of said‘ tube moving} means. » 5‘. Apparatus‘ for use iii the manufacture“ of tempered" glass vc’on'ii'i'rising a pair‘ of‘s'p-acedhead; ers'adapted to be" positioned on opposite sides of While I preferably employ“ a gas such as air in 60 the“ glass‘ sheet to be tempered, each‘ header hav the carrying out of my invention, it will’ be ob‘ viousthat any other ?uid capable-of being forced through the/tubes under pressure may be used. For example, other gases or vaporized liquids‘may be- employed. While I have shown and described a-preferred embodiment'of my invention I do not intend to be limited-thereto as my invention .may be-other wise embodied within the scope- of the appended claims. I claim: 1. Apparatus for use‘ in the manufacture of temperedv glass comprising a' plurality of open ing" its’ discharge’ end adjacent one’? face of the glass‘ sheet; a plurality‘ of- open? ended ‘ tubes com municating‘iwithl each? header ' and extending for‘ wardly thereof towardeai face of the glass sheet, means communicating with-‘each header'for sup plying-“gas thereto’ under‘ pressure‘,- and actuat ing means; in'cllidi'ligi' a- piuralityor 'l'in‘iit" Switches, operatively connectedlwith each of‘ said tubes ' for repeatedly» reciprocating the’ tubes; toward- and away- from-the glassi'during the‘ tempering opera tion; ' ‘ 6} Apparatus" for" use" in‘ the manufacture of ended tubes, supporting means" for supporting: the tempered glass comprising- a pair'of spaced? head' tubes with' one end ofeach adiac‘ent'the" glass the‘ glass-sheet to‘ be‘ temperedi,»a plurality‘ ofopen ers adapted to be? positioned on oppositeisides‘of 2,411,701 ended tubes, means for supporting each of said tubes with one end in communication with a header and the other end adjacent the glass sheet, means for supplying gas under pressure to each of said headers, and automatically reversible means connected with each of said tubes for mov ing some of the tubes adjacent each face of the glass sheet toward the sheet While, at the same 10 supporting each of said tubes with one end in communication with the header and the other end extending forwardly therefrom, and means connected with each of said tubes for reciprocat ing it axially relative to said header, said means including limit switches for automatically revers ing the movement of each of said tubes. 9. Apparatus for manufacturing tempered glass comprising a header, a plurality of openv 10 ended tubes cooperating with said header, means face away from the sheet. for supporting each of said tubes with one end 7. Apparatus for use in the manufacture of time, moving the remaining tubes adjacent each communicating with the header and the other tempered glass comprising a pair of spaced head end extending forwardly therefrom, means for ers adapted to be positioned on opposite sides of forcing gas under pressure through said header the glass sheet to be tempered, a set of open and said tubes, means connected with a portion 15 endedtubes cooperating with each header, a sec only of said tubes for reciprocating them axially ond set of tubes cooperating with each header al relative to the header, means connected to the re ternately arranged with respect to the tubes in maining tubes "for reciprocating them axially rel the ?rst mentioned sets, means for supporting ative to the header and in a direction opposite to said tubes with one end in communication with a header and the other end adjacent the glass 20 that of said ?rst mentioned tubes, and common driving means for reciprocating said tubes. sheet to ‘be tempered, means connected with the ?rst mentioned set of tubes on each side of the glass sheet for reciprocating them toward and away from the sheet, means connected with said second mentioned set of tubes on each side of the 10. Apparatus for manufacturing tempered glass comprising a header, a plurality of tubes, cooperating with said header, means for support ing each of said tubes with one end thereof com municating with the header and the other ex tending forwardly therefrom, means for forcing gas under pressure through said header and through said tubes, a cross plate connected to a said tubes being arranged so that one set on each 30 portion only of said tubes, a second cross plate connected to the remainder of said tubes, and side of the glass sheet is moved toward the sheet means for moving the cross plates and the tubes while the tubes in the other set on each side are secured thereto in opposite directions and for au moved in the reverse direction. glass sheet for reciprocating them toward and away from the glass sheet, and means connected with each of said headers for supplying air under pressure thereto, said reciprocating means and 8. Apparatus for manufacturing tempered glass comprising a header, a plurality of open ended, 35 tubes cooperating with said header, means for tomatically reversing themovement thereof. THEODOR G, WEIHS.