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Патент USA US2411701

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Nov‘. 26; 1946.
T, G, wElHs
Original Filed Aug. 7, 1940
4 Sheets-Sheet 1
7776040!’ 6 We [/75
javgwqmd a”
Nov. 26, 1946.
T‘. G. WElHS
Original Filed Aug. 7, 1940
4 Sheets-Sheet 2
Theodor é?/el'h-s‘
NOV- 26, 1945-
T. G. WEI-HS '
Original Filed Aug. 7, 1940
4 Sheets-Sheet 3
@1Q$H4Ww.I‘J¢.Am o @
Q Theodor GJVe 1775
Nov. 26, 1946.
Original Filled Aug. 7, 1940
4 Sheets-Sheet 4
I157. 6. '
" WM
Patented Nov. 26, 1946 ‘
, 2,411,701
PATENT _»ol=ncs
‘ 2,411,701
: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
10 Claims. (Cl.v 49%45)
.} ‘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
acter. qrInr addition, the‘ glass manufactured in
accordance with'my invention is relatively free
my copending application Serial No. 351,757, ?led
into innumerable small pieces of suitable char-e
improved apparatus for frnanufacturing such
‘glass.’ The present application is a division of
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
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.
"the 'adiacentjstreams impingeupon the
.: _.Someofthemethods‘of tempering glass which
the glass sheets and alternately increase
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
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
directly _ againstwthe glass sheet by; , means, , of - a
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
.-;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
Figure 5 is a partial sectional view, showing a
connection between one “of. the tubes and the
driving ‘mechanismyand
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. ,
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
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
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
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
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,,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
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
jjIij will be,
fromthe above,
. '
.7 description
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
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
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
;_ 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
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
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.
V. . -
» .
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.-_
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;
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
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
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
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
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
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
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
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
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
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.
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