US1683973A - Leer construction - Google Patents

Description

Sept. 11, 1928 1,683,973 H. 5 HEICHERT LEER CONSTRUCTION Filed July 29, 1926 5 Sheets-Sheet INVENTOR Sept. 11, 1928.

H. S. HEICHERT LEER CONSTRUCTION Filed July 29, 1926 5 Sheets-Sheet 4 Sept. 11, 1928. 1,683,973

H. S. HEICHERT LEER CONSTRUCTION Filed July 29, 1926 5 Sheets-Sheet 5 INVENTOR t e Sept, .19 Y ,1,683-,973= v -Sf PATENT OFF-ICE.

i HERMAN; s. HEIGHERT, or PITTSBUR H, rENNsYLvANm,AssIGNo;a 'ro rnrsnumn PLATE GLASS come,- A conrona'rron or rnnnsynvmm.

mm CONSTRUCTION.

Application filed July 29,1926. Serial No. 125,670.

'The invention relates to roller leer conmovement ofthe high speed rolls is reduced,- structions and particularly to such conwhich arrangement, as above stated, allows 65- structions as used in an intermittent casting the use of the leer to'its full capacity. The and rolling operation in the production of rolls in the high speed section of the leer pref- 5 plate glass. In this'operation, it is desirerably have'a slow drive, of'the' one .way able from the standpoint of produgtion and clutch, and also a fastdrive made effective quality that the glass be rolled into sheets bymagnetic clutches, so that when these at a high rate of speed, preferably in the clutches are energized, the one way clutch neighborhood ofthirty feet-a: minute, al-' connections with the slow drive, permit the 16 though this may lie-greatly increased. .Such rolls to be driven ahead, and when the a speed of production would necessarily clutches are released, the slow drive acting call fora leer of very great length. if the through the one way clutch devices'immedi- 65 glass sheet were carried entirely through ately picks up and drives the. rolls. the leer at the same high .rate of speed at Properly timed automatic switch devices which it is produced. The leer oft-he pres-- control the magnetic clutches, although, if e'nt invention is designed so as to permit the desired, the switches may be operatedby glass .to be carriedthrough the front end hand. The hand operation of the switches of the leer at'a high rate of speed and then is facilitated b the indicating devices, herethrough the following (and major) portion 'tofore referre to, which. show (by means 4 of the leer at a speed which is only a fracof a series of lights) the location in the leer 'tion of the speed" in the frontend. One of of-the front and rear ends of thesheets. the principal objects of the invention is The indicating devices preferably include 7 the provision of improved means whereby switches which are operated by the endsvof the successive sheets of glass maybe brought the glass sheets as they pro ess fthroughinto relatively close proximity in their the -leer.- The switches whic control the passage through the leer, so that the full' magnetic clutches might also be operated capacity of the leer may be. utilized? A; from the sheets themselves, but they are further object is toprovide an improved preferably operated by a timing arrangemeans for making the shift from one speed ment,jlocatedatthe rear end of the leer, as p to another in the entrance end of the leer later more fully described. -The term leeris automatic. A still further object is the proused throughout in itsbroad sense, the high vision of animpro-ved arrangemdnt of-indispeed port1on of the runway leading'to the 8.5 eating means governed by the glass sheets slow speed section of'the leer-being re rded themselves for informing the operator of the as a part of the leer regardless 0 how.

location of the ends of the sheets as they much of,"or to what extent, such high speed pass throi h the forward "or high speed portion is left uncovered'orunhooded in section 0 the leer. The arrangement is, order toy-facilitate the cooling of the sheet preferablysuch', as more fully'appears later, when first formed and as it travels away ,that the glass sheet in passing from the high from the rolling or generating apparatus.

9 speed section of the leer to the low'spe'ed -One embodiment of the invention 1s illussection is always supported by rolls which trated in the accompanying drawings,

all have the same rate of per pheral speed, wherein: p v p i Q so that there is no tendency to buckle the Figures land 1 together constitute a sheet, which might occur, if a sheet were partial pl 11 view and partial horizontal engaged at its forward end by the slow' section. igs. 2 and 2 togetherconstltute speed rolls, while. it was still being supa longitudinal section. Fig. 3 1s a se'ct10 n' ported at its'rear end by thefhigh speed on the'line III-*III of Fig. 2. F1 4 1s rolls.- The rolls are also so arranged and a section on the line of lgi 2. timed that. the forward end of'asheet which Fig. 5 is a section on the hue VV of 1gi is being moved ahead by the high speed rolls 2. Fi 6 is a longitudinal section throng comes closely adjacent the rear end of the one o the combined pin and magnetic preceding sheet-Which is being. moved forclutches. Fig. 7 is a transverse section on v v ward by the low speed rolls before the rate of the line YII'-,-VII of 6. Fig. 8 is a longitudinal section ,through the pin clutch which connects the slow speed line shaftwith the high. speed line shaft. Fig; 9 is anend view of one of the clutch sections of Fig. 8. And Fig. 10 is a diagrammatic'view showing the wire connections.

The rollin apparatus for generating the sheet is simil ar to that shown in the Showers I Patent No." 1,579,666 and comprises a'large annular shell 1 and a driven sizing roll 2 between which the molten pot of glass to be formed into a sheet is poured, the recesses at 3 being large enough to receive the entire pot of glass and the. ends of the recess being closed by triangular end members 4. The shell 1 is supported upon the transverse rolls 5 and 6 journaled in the end framw 7, 7' (Fig. 3), and driven as hereinafter described, the roll 6 being placed in opposition to the sizing roll 2, which is also driven. The" driving power for the roll is supplied from the'line shaft sectiond'l.

This line shaft section carries a worm which drives a worm wheel in the casing 8, such worm wheel being mounted upon a shaftprovided with the pinion 95 This pinion meshes with an idler pinion 10 journalcd tarries another ,spur gear 14 meshing with upon theshaft 11, which in turn with the spur gears 12 and 1'3keyed to the ends of the 'rolls5 and 6. The roll 6 also a gear 15 carried by the shaft of the sizing roll 2. Forward of the casting roll l'is a water cooled apron 16 for receiving the sheet of glass after it is formed between the casting roll and the sizingroll.

The leer 17 through which the glass sheet is carried for annealing is of the roller type,

the rollsbeing divided intoa plurality of independently driven sets 19, 20, 21, 22, 23,

24, 25, 26, 27 28, etc. "Intermediate the forward end of the leer and the apron '16 is another set of rolls 18 also independently driven. The ends of the roll shafts are provided with sprockets around which pass the chains 29, 29,29, etc, such chains passing around suitable drive sprockets 30, 30, 30, etc.

' Thesesprockets 30 are driven from the drive ty vided shaft sections which extend longitudinally of the side. of the leer, suchdriveshaft sections being provided with pin ions 31 meshhigh speed andthe other part of the time atfa relatively slow speed, while the rolls Y lyingin the'section marked B are always driven at a relatively low speed? The section A will vary in length somewhat, but

. ordinarily at least equal to'the-lengt-h of meshes general divisions, those lying,

the sheet produced. The sheet will, of

course, vary in length, but will ordinarily range from 40to-6O feet. The section B, of which only the extreme, end is shown, is very much longer than the section-A. Its length will vary, but will ordinarily beup speed section A of the leer may be further subdivided into two-sections marked A and A". The section A is made up of the'sets of rolls 18 to 22, which are all driven at "wards of 500 feet" in length. The: high.

the same'speedat any one time,'that is,

either allhigh speed or all low speed, while the sets of rolls 23, 24, 25 and 26, making up the section A may be driven all'at high speed or all at low speed, or-with; the rolls of one or more sets at a higher speed than 1 those ,of the other sets, the means whereby" the rolls are driven at thevarying speeds being later described. In operation, a pot the recess 3' between the rolls 1 and, 2 and a sheet is rapidly rolled Gut between the rolls the rolls 1 and 2 and that of the rolls in the of glass is-poured into 'and into the leer, the peripheral speedof sections 18 to 22 being approximately all the same. At this time, the sets ofro'lls 23 to 28 are all driven at slow speed. When the forward end of the sheet reaches the point C, the set of rolls 23 is automatically speeded up to correspond with the specdof- .the' preceding set-s 18 to 22. A similar.

speeding up occurs'in the sets of the sections 24, 25 and 26 as the forward end of the sheet 10o successfully-reaches the points D, E and F.

When the front-end of the sheet reaches the point G, the speedofthe. sets 18 to 26 is automatically reduced to slow speed corresponding to that of the slow speed of the sets 27,28, etc. When the sheet has advanced still farther so that its rear end lies I somewhere in the section A of the'leer,

another pot of glass is cast into the recess 3 andlthe rolling of a second sheet started, At this time, the operator shifts the sets 0t sheet, therefore, advances ra'pidly through the IeerYgaining upon the rear end of the first sheet which is advancing at perhaps onefourth'of the speed of the second sheet.

The cycle of increasing speeds in the section A afterthe forward end of the second sheet reaches this section proceeds as heretofore described in connection with the first J sheet and-the two/sheets are so timed that immediately after 'the rear end of the first sheet passes the point G, the front end of the second sheet passes the point F. By the time thefront end of 'the'second sheet passes the'point G, it is relativelyclose to the rear end of' the firstshe'e't, perha s within. 2 feet.

In the normal operation 0- the ap aratus, therefore, the sheets .may be hrou' t very close together so that thefull lerigt of the leer is utilized, which would not be the case 'llo rolls 18 to -22 to high speed. This second.

with the wiring diagram of Fig. 10, but ifv desired, this automatic operation may bedispensedwith and the shifting of speeds maybe controlled by the operator who is located near the rolls 1 and 2 and who throws the proper switches at certain intervals, which are determined by the positions of the glass With either automatic or sheets in leer. non-automatic operation, it is desirable to provide some means for informing the operator at all times of the positions of the ends of the sheets in the leer-in the highv speed section, and for this purpose, the switch arms 32, 33, 34, and 36 are provRled, such arms being operated by the ends of'the glass sheets moving through the leer. The electrical connections "and circuits whereby -this is accomplished will be .later described in connection with the wiring arrangement, as shown in Fig. 10.

The arrangement whereby the sets of'rolls in the leer are'driven in accordance/with the operation as above set forth will no be described, reference be ng had to 'Fig. 1, which shows the general arrangement. The drive is accomplished from two motors 37 and 38, the motor 37 providing the high speed drive, while the motor 38 provides the low speed drive. The low speed motor'is, geared to. [64' and 65, the first o the line shaft section 39 'by means of the pinion 40 and section, the method of transmit.- to the sets of rolls being the heretofore described in connecslow speed hand end of the section 39 is connected, to the next section of 'lineshaft 42 by means ofthe pin or roller clutch :43 ,shown' in'de taxi in Figs. 8 and 9. This"arrangement permits'the shaft section. 42 an dfallof the shaft sections to the left thereof to bel'driven at slow speed' from-the section 39, but at the same time, permits the section 42 and-all of the sections to' the left thereof to be driven at a higher rate of speed than the shaft section 39. when such sections are connected to the high speed motor 37, as hereinafter described. The clutch 43* is in effect a ratche connection-which permits the section 42 to b driven from the section 39 or permits the section 42 to be driven in the same direction at a higher rate of speed than the section 39. Following the line section 42 a'fid extending to the left are the successive line shaft sections 43, 44, 45, 46 and 47, a-ll of'whichmay be driven from'the shaft section 39at slow speed or may be driven from the motor 37 through the intermediary 10f The shift of'speed at the gear 41. This section 39'ex-- tends to theright the length of the leer and drives all ofthe various sets of rolls inthe the shaft section 46, which is 1 high speed motor by means. of the pinion 48 and gear 49, the'latter being keyed ,tothe line shaft section 46.

Between the adjacent ends, of ,theline shaft sections 42 to 47 are the combination roller or ratchet drive of these clutches 'fis similar to that of, the pin drive 43 showngeared to the pin or roller and magnetic clutches-591:6 54,.

in Figs. 8jand 9. which hasflnot yetbeen de-, 7

scribed in detail. '=tween the shaft sections 39 and 42 comprises two inter-fitting casings and 56 keyedto the ends of the shafts and lockedfiogether by. means of the rollers 57 when the shaft 39 is driven forwardly. The casing 56 is pro-' vided' with the cam recesses 58 and the pins or rollers 57 lie in these rcccssesand bear against the ring now to Figs. 6 and 7, which show the combination roller and magnetic clutch between two of the shaft sections,- such for in stance, as the clutch'50 between the sections 42 and 43, the roller section of the clutch flange of the casing 55. Refer- This roller drive 43 bei consists of the casing 59 keyed to the shaft :42 and provided with 'a flange 60 havingthc cam recesses '61, such recesses carry ng the pins or rollers 62, which bear against the hub 63 keyed to the'end of the shaft ,sec-

tion'43. The magnetic portion of the clutch osin'g memberswhich is secured "to ans of the plate 66,.

ft=43 by, hub'67.: The member 65 is. providedwith the coils orwindings 68. -by 5 which the clutch is energizediantij these coils are connected with the pairiofgbrushrings' comprises the twoop the member -59 by m while -the other is secu ed to the she 'means of the 69 and 70, which are insulatedfrom each other andto which the wires fromthe coils magnetic clutch well known in the art, This [arrangement permits the shaft seeare connected. This is a-conimercial type of tion 43 tobc driven by the slow speed shaft rollercli'itch, or when the shaft-section 43 is driven at a high speed, the roller clutch permits the section 43 to run at such higli without interference from the'\ s'haft 42-. ,If it now becomes desirable to" speed section drive. the shaft section 42 at a high shred from theshaft- 43, the magnetic clutchi" en ergi'zcd andand .38v running continuously, and permits of a shift from high to low speed and vice to provide for emergencies; 3

versa. In order section 42 through the intermediary'of the.

the two shaft sections 43 J an d 42 are:connected'togetherand rotated" at a two other motor drivesare provided, duplicatingthemotor drives 37 and 38.. The motor. drive 37 corresponds to the motor drive 37, while the motor drive 38 corresponds tothe motor drive 38; These motors are geared to the l ne shaft 1n the same manner 'fas themotors 37 and 38, and run continuously the same as 37 and '88, so that in case of accident to the motors 37 or '38, these supplemental motors take over the load automatically without discontinuing the operation of theleer.

-The automatic Controlling mechanism with the electrical connections is shown in Fig. 10, The end of one of the apron rolls 18 is provided with a clutch 119 driving a worm which meshes with a worm wheel mounted in the casing 71 and theshaft 72 v v U ofthis worm wheel carries the control arm 7 3, which 'in the courseof its movement operatesthe switches 74, 7 5, 7 6, 77, 7 S and 79,

- such switches being providedwith the switch arms 80 to 85. Theswitch arms 80 to 83 are normally held yieldingly .in open position so that their switches are open, while the switch arms 84 and 85 are normally pressed downward so that the switches 78 and 79 are closed. The arrangement is such that after the arm 7 3 passes the switch arms 80 to 83,-closing them in its passage, they then move to open position. The gear re- ,duction, by means of which the arm 73 is rotated, is such "that it will rotate to the switch 74, while the sheet of glass which is formed between the rollers land 2, is moving to the point U (Fig. 2). The other switches are similarly located, the. switch 78 being so positioned that its arm is engaged by the arm 7 3 when the forward) end of the sheet in the leer reaches the point G. The slowfspeed motor 38 is stopped and started from the push button box 86 having the start and stop push members or buttons 87' and 88. The starting of the motor is controlled through the starting box 89 and the starting rheostat 90." This slow speed motor '38 is operated practically continuously and drives all the rolls in the leer andthecasting an sizihg rolls, except during the period in which the hi h speed motor 37 controls the ovement o the rolls in'thehigh speed .SQCtIOII of the leer and of the casting and sizing roll, as later described. The high s eedmotor 371s stopped and started from the push button box 91 having the starting button 92 and the stopping button 93. the starting of the motor being-controlled through the starter 94 and rheostat 95, which are standard electrical e uipment and "require no description. The ox 9l isjof standard construction of the type in which the circuit is completed when the button 92 is pressed in, but which is broken when the button 92 v is released, or when the button 93 is pressed. Currentis supplied 'for operating the sys tom through the lines 96 and 97., The cirwit to the field of the .motor is made through the line-98 and that to the armature through the line 99. The return 'cir-- cuit is through the line 100..

The lights 101, 102, 103, 104C and. 105 which serve to indicate the position-of the ends of the glass sheet and the leer and which are controlled from the switch arms 32 to 36 are operated from an alternating current line 106, 107. lVhen the forward end of thesheet passes beneath the switch arm 32-, it swings such arm so as tocomplete the circuit at 108 and current flows to-the lamp 101, through the lines 106, 109 and 107.

, Whenthe rear end of'the sheet passes this same switch arm ,32, it drops down breaking the circuit at 108 so that the lamp 101 goes out. The other lamps 102' to 105 are similarly lighted and extinguished, thus indicating the time when the ends of the sheet arrive at and pass the points D, E, F and G,

The operation is as follows, assuming that the button 87 of the low speed motor 38 has been pushed and that the leerrolls and also thecasting and sizing rolls are; being rotated at a slow speed from this motor; \Vhen a pot of glass is poured into \the recess 3 between the casting and sizingrplls and distributed along a line parallel to its axis, the operator presses the starting button 92 in the box 91, thus completing the circuit through .the starter, the lines 98, 99 and 100 and the motor 37. This motor immediately starts up, and through the line shaft sections 100 4-0 and 47, starts the rotation of the sets of rolls 18 to 22 and the sizing andcasting rolls at high speed. The completing of the circuit'throughthe lines 99 and 100 also completes the circuit .through .the, magnetic loa clutch 51 via the lines 110 and 111 and the switch arm 11250 that the starting of the motor clutches the line shafts 4:6 and 17- together. The switch arm 112 is closed at this time since the pressing of the button 92 110 establishes a circuit through the coil 113 via the lines 96, 11 1, 115 and 97. Then the but-' ton 92 is released the arm still remains closed due to another circuit, including the coil 113 and comprising the lines 96 and 116, the 115 switch 79, the line 117, the resistance 118, and the line 97.- The current through this circuit, because of the resistance 118 is not strong enough to close 'the arm 112, but when.

once QlQi-JGd. the current. is sufiic'ient to hold"12 0 i tion of the arrow. This movement carries 1 30 i the arm 73 from beneath the'switch arm 85 of the switch 79,- thus completing a, circuit I through the lines 116 and 117 and the re- 'sistance 118. The movement'of the arm 73 from beneath'the arm a short time before;- the experiment with the arm 85 completes a' circuit through the push button box 91 and the wires 120 and 121 leading to the starterand' to the push button box. This circuit constitutes a partof the circuit in which the lines 99 and 100 lie, so that after the button 92 is released by the operator and snaps forward, breaking the circuit at this point, the.

" circuit from the lines 96 and 97 through the motor is maintained by reason of the lines 120 and 121 and the contact in the switch box 78 which is made effective by the passing of the arm 73 from beneath the switch arm 84. The purpose of this arrangement,

as will appear in the further description of;

' the operation, isto provide a means for the arm 73 has rotated so that itpasses be- 7 assoon as the sheet arrivesat the forward breakinrr the circuit at 78 and-stopping the motor when the arm 73 has made a complete circuit and arrives at the position shown in vthe drawing. The rolling operation now continues at a high speed until the forward end of the sheet, which is beingformed arrives at the point C (Fig.2), at which time neath the switch arm 80 and completes a circuit in the switch 'i 4. This causes the switch a'rm.1 22, under the influence of the-winding 123 to close, making a contact at 124. This completes the circuit throughthe magnetic clutch 53 so' that the shaft section 45. is

clutched to the shaft section 46 and rotated at the samehigh speed as theshaft'section 46. This shaft section 45 drives the set of rolls 23 so that the speed of these rolls is brought up to the speed of the rolls19 to '22 endof the set. The circuit as thus completed includes the 'line'110, windings of clutch 53, line 125, switch arm 122, line 126,

switch arm-112, andline 97. In order to assist in the operation of the switch arm 122, .a resistance coil 127 is employed. Before the switch at 74 is closed, current from the line 110 passes through both of the coils 123 i and 127 back to the return line 126, and the I 'resistanceof the arm-122 to movement isso adjusted that under these conditions, the switch arm will not move to the left to complete the contact at 124. When, however,"

the, circuit is completed at '74between the wires 128 and 129,-the resistance coil 127-is short circuited and the current from the wire 110 flows through only the single coil 123 andback to the line 126 through the wires1'28 and 129. This causes the closing of the switch arm'122'. As-soon as the arm 7 3.passes the switch arm 80, this arm moves to the right, again breaking the circuit at 7 4, but the switch arm 122 still remainsin closed position as the current flowing through the coils 123 and 127 is still strong enough to hold the 'armclosed, after it is once ,closed, although not strong enough to move it to closed position.

WVhen'the end of the sheet moving still farther to the right over the set of rolls 23 reaches the point D in the leer (Fig. 2) the arm 73 reaches a point where its end swings the switch arm 81 of the switch .75

to the left, thus momentarily completing the circuit between the wires 130 and.131. This causes the closure of the switch arm 132 and the actuation of the magnetic clutch 52 so that the set of rolls 24 are speeded up-by reason of the line shaft sectlon 44 being clutched to the line shaft section 45. In-

this-manner, as the sheet moves to the right still farther, the switch arms 82 and. 83

' are operated, causin the clutches 51 and 50 to be actuated so .t at the sets of rolls 25 and 26 arebrought up to the same highspeed as .the preceding sets of rolls. This operation is secured by the actuation of the switch arms 133 and 134, the method of operating and the connections being obvious without further explanation. The sheet has now been completely generated and moved through ,the leer a distance such that it is feasible. to slow up its movement without danger of its settling into waves between the rolls, and 1e next operation is the automatic breaking o the circuit to the motor 37 followed by the shifting of the sets of rolls 18.

to 26 from highspeed to low speed. This occurs when the forward end of the sheet arrives just short of the point G '(Fig. 2),

at which time the arm73 reaches the roller of the switch arm 84. When the arm arrives at this point, it moves the switch arm 84 up, thus breaking the circuit through the lines 120 and 121 and that .through the lines 99 and 100 passing to the motor, so that at this time, the speed of the motor 37 and. of

the line shaft operated'from such motor, drops down to a point where it is picked up by the slow speed motor acting'throu h the series of roller clutches 50 to 542 By t 6 time this occurs, the arm 73 will havereached its starting position, as slfown'in the drawings, withits end in engagementwith the roller of the swi ch arm '85, which is pushed upward, breaking the circuit between the'lines 116 and 117. This'inte'rru ts the circuit through the winding 113 50-13 at the arm 112 opens, interrupting the circuit between the return line 126 and the line 97 and v causing the release of the magnetic'clutches 50, 51, 52, 53, 54, and 119. It is desirabler might show inthe sheet of glass. -The in connected thereto, so that, if the shaft sec-' tions were uncoupled when the motor circuit is interrupted, there would be a tendency to buckle the sheet between the section of the glass sheet lying on the rolls 19 and 22 and that lying on the rolls 23. This completes the cycle involving the production of one sheet, and another sheet may be formed and fed into the leer when the rear end of the sheet which has just been formed reaches a point lying somewhere in the section A of the leer. -The operation as above described can now be repeated, starting with the pressing of the button 91, when the next pot of molten lass is deposited in the recess 3 between the forming rolls;

An important advantage, incident to the shift from the high speed drive ofthe rolls to the slow "speed by the use of the .roller clutches is, that the shock imposed upon the glass incident to the shiftfromone speed to the other is very slight, so that the glass is not deformed so as to give any indication ofthe shift. This'is' due to the fact that the sheet and rollers coast after-the magnetic clutches are thrown out, and the reduction m simplicit in illustration, the various connecspeed during this coasting period is so gradualthat when the slow speed drive catches" of pawl and ratchet connections and constione way tute, what may be termed clutches. This term is used in the claims I to designate any form of clutch having the same function of driving theone shaft section from another slow speed section and.

yet permitting the driven section to be driven' ahead at a higher speed from another source of'power without interference from the clutch. or the slowspeed section. For

tions an contacts governing the automatic control, are shown as single -members throughout, but it will beunderstood that in practice it" iscontemplated that these parts may be in duplicate, as insurance against accident to, or failure in, one of. the

' individual parts.

WhatIclaiinisz" roller leer comprising a'high speed section which receives the s which receives the sheets from the rolling apparatus, anda slow speed section following the high speed section,'means fbr drivin the rolls .of the slow speed section at a relh tively low rate of a peripheral speed means for driving the rolls of the high speed section either at a rate of speed corres onding to that of the rolls in the slow spee section, or at a much higher rate of speed, and

means for shifting said rolls of the high speed section from one of said speeds to the other. v, I

F 2. The combination with apparatus for intermittently rolling sheets of glass, of a roller leer comprising a high speed section apparatus, and a slow speed section follow- 0 which receives the sheets fromthe rolling ing the high speed section, means for driving .the rolls of the slow speed section at a relatively low rate of peripheral speed, means for driving the. rolls of thehigh speed section either at a rate of speed corresponding to that ofthe rolls in the slow speed section,

or at a much'higher rate of speed, and means for automatically shifting said'rolls of the high speed section from the higher speed to the lower-"one after the glass sheet on said rolls has set sufficiently. to prevent sagging of the sheet when lower speed is made. u

the shift to the 3.- The combination with-apparatus for Y intermittently rolling sheets of glass, of a roller leer comprising a high speed section which receives the sheets from the rolling;

apparatus, and a slow speed section following the highs eed section, means for drivin the rolls 0% the slowspeed section at a re ativel low rate of peripheral speed,- means fhr driving the rolls of the high speed section. either at a rate of speed corresponding tothat of the rolls in the slow high speed section from the low speed to the higher one, and'automatic means'for shiftin said rolls back to the slower s eed again before the sheet has passed 0 of speed section or at a much higher rate of ,speed, means for shifting the rolls of the said rolls and onto the rolls of the slow speed section.

4:. The combination with apparatus for intermittently rolling sheets of glass, of a roller leer comprising a hi h speed section ieets f i'om the rolling apparatus, andwhich is divided into a plurality of sets of rolls, and a slow speed 'sec tion following the high speed section, means I for driving the rolls of the slow speed se'ction at a relatively low peripheral speed, means-for'driving the sets of rolls making up the high speed section either at said relatively low peripheral speed or at a much p higher one and-means for shifting'said-sets 1. The combination with apparatus forv intermittently rolling sheets of glass, of a of rolls successively from slow speed to sets back-i to low speed before the sheet reaches. the slow speed sectlon.

5. The combination with apparatus for intermittently IOllll'lg sheets of glass, of a roller leer comprising a high speed section WlIlQ-h IGCQIVGSilIG- sheets from the roll-. mg apparatus,

plurallty of-sets of rolls, and a slow speed section following the high speed section,

means for driving the rolls of the slow speed section at a relatively low peripheraLspeed, means for driving the sets of rolls making up the high speed section either at said relatively low'periph'eral speed or at a much higher one and automatic'mcans for shifting said sets of rolls successively from low speed to high speed as the glass sheet ad vances along thehigh speed section.

6. The combination with apparatus for intermittently rolling sheets of glass, of a roller leer comprising a hi h speedsection which receives the ,sheetsfrom the rolling apparatus, and which is divided into a plurality of setsof rolls, and a slow speed section following the high speed section, means for-driving the rolls of-the slow speed sec-- tion at a relatively low peripheral speed, means for driving the sets rolls making up the high speed section either at said relatively low peripheral speed or at a muchhigher one, and automatic means for shifting'sa'id sets of rolls successively from low speed to high speed as the glass sheet advances alon the high speed section and for shifting sai sets all back to low speed before the sheet reaches the slow speed section.

7 The combination with apparatus for *intermittently rolling sheets of glass, of a rality of sets of rolls, and a slow speed sec-.

' section also at said low peripheral speed,

roller leer comprising a high speed section which receives the sheets from the rolling apparatus, and winch 1S dlvided nto a plu tion following the high speed seetion, means for driving the rolls of the slow speed section at a relatively low peripheral speed,i

means including one wayv clutches for driving the sets of rolls making up the high speed other means including a source'of electric current, and magnetic clutches for driving said sets of rolls at a much higher rate of and means for successively energizing said .magnetic clutches to rolls from low speed to high-speed asthe glass sheet advances along the high speed section. v

, 8. The combination with apparatus for intermittently rolling sheets 'offglass, of a roller lencomprising a high-speed section which receives the sheets from 'ther olling apparatus, and which is divided into'a plu-,

rality of sets of rolls and a slow speed section following the high speed section, means for driving the rolls of the slow speed section at a relatively 'low peripheral speed,

and which is dividedinto a shift the sets of means including one Way clutches for driving the sets of rolls making up the high. speed section also at said low peripheral.

speed, other means including a source of electric current and magnetic clutches for driving said sets of rolls ata much higher rate of speed, means for successively energizing said magnetic clutches to shift the sets of rolls from low speed to high speed as the glass sheet advances along the high speedv section, and means for. causing the release of said magnet clutches at one time .before the glass sheet reaches said slow-speed section. v

9. The combination with apparatus for intermittently rolling sheets .of glass, of a rate of speed, automatic means for successively energizing said magnetic clutches to shift the sets of rolls from low speed to high speed as the-glass sheet advances along the high speed section, and automatic means for causing the release of said magnetic clutches at one time before the glass sheet reaches said slow speed section.

10. The combination with apparatus for intermittentlyrolling sheets of glas's of a roller leer. comprising a high speed section which receives the sheets from the rolling apparatus, and which is divided into-a plurality of sets of rolls, and a slowspeed sec-.- tion, means for driving the rolls of the slow speed section at arelatively low peripheral speed, means including one way clutches for driving the sets of rolls making up the high speed section also at said low peripheral speed, other means including a source ,of electric current and magnetic clutches for driving said sets ref rolls at a much higher rate of speed, means for successively energizing said magnetic clutches to shift the sets ofrolls'from low speedto high speed as the glass sheet advance-s along the high speed section, and -meansfor causing the release of said magnet clutches at one time before the glass sheet reaches said slow speed section, said automatic means including a'member geared to move in timed relagoverning the supply of current to said magnetic clutches.

v 11. The combination with apparatus for tion to the movement of there-11s of the leer, and switches controlled by said member and w intermittently rolling sheets offlglass, of a roller leer comprising a high speed section which receives the sheets from the rolling apparatus, and which is divided into a plurality of sets of rolls, and a slow speed section following the high speed section, means for driving the rolls of the slow speed section at a relativelylow peripheral speed,

means including one way clutches for driving the sets of rolls making up the high speed sect on also at said low peripheral speed, other means including asource of 7 electric current and magnetic clutches for interruption of sue driving said sets ofv rolls at a much higher "rate of speed, automatic means for successively energizingsaid-magnetic clutches to shift the sets of rolls from low speed to high speed as the. glass sheet advances, along the high speed section, and automatiemeans for causing the release of said magnetic clutches at one time before the glass sheet reaches said slow speed section, said automatic. means including a member geared'to move intimed relation to the movement of the rolls of the leer, and switches controlled by said-member and governing the supply of current-to said in gnet clutches and the current.-. 12. The comb'nation'with apparatus for intermittently rolling sheets of glass, of a .roller leer comprising a high speed. section which receives the-sheets from the rolling apparatus, and-a slow speed section following the high speed SGCt-lOl'l, means for driving "the rolls of the slowspeed section at a relatively low rate of peripheral speed, meansfor driving the rolls of the high'speed section either ata rate of speed corresponding to that of the .rolls in the slow speed section or at ai much higher. rate-of speed, means for ,s'liifting said rolls of the high speed section from oneof said speeds to the other,

and electrical means including asource of. electric current and sw tchesgoverne'd bythe ends of the glass sheets in the leer for the position -e-- iich endslongr l of'fthejleerp tudina 13. The combinatioirwitli apparatus for intermittently rolling sheets of" glass, of a roller leer comprising a high speed section which receivesthe sheets fromthe rolling ap- 'par'at'us, and a slow speed section followingthehigh speed section, means for driving the rolls of the slow speed section ata relatively lowrate of peripheral speed, means fordriving the rolls of the high speed section either at a rate of speed corresponding to that ofthe rolls in the'slow speed section or at a ,m'uch higher'rate of speed, means for shifting. said rolls of the high speed section from' I "one of sa d speeds to the other, and electricalmeans including a source of electric current and switches governed'bythe ends of the glass sheets inthe leer-and lights adjacent -'the rolling apparatus for indicating to the clutches. I i '16. In an apparatus of the class described,

operat'or the position ofsuch ends longitud- I inally-of the leer.

14;, The combination with apparatus for intermittently rolling sheets of glass, of a roller leer comprising a high speed section which receives the sheetsrom the rolling apparatus, and a slow speed section following the high speed section, means for driving the rolls of the slow speed section at a relatively low rate of peripheral speed, such 76 means including a motor and 'a line shaft section extending longitudinally of the leer, and means'for driving the rolls making up the high speed section of the leer including" a motor and line shaft section, and acne 80- way clutch between said line shaft sections, so that the first motor will drive both line shaft sections Whengthe second motoris not supplied with electric current to drive the second motor.

15. The combination I with apparatus for intermittently rolling sheets of glass, of a roller lcer comprisin a high speed section which receives the sheets from therolling rality of sets of rolls, and a slow speed sec: tion following the high speed section, means a for driving the rolls of the slow speedsection at a relatively low peripheral speed, said apparatus, and which is divided into a plu means including-a motor and a line shaft .95

section. extent 'ng longitudinally of the leer, and means f driving the sets of rolls making up the high speed section of the leer r clutch between each pair of adjacent ends of the high speed shaft sections, and a source of current for energizing the magnetic means for forming a quantity; of molten glassinto a flattened lengthof glass at a relatively high speed, a leer, conveyor means for delivering the forme glass completely into the leer at the speed of forming of the of the glass through the leer at a; relatively lower speed, and means operable to change the speed of movement of at least a portion glass, means, for continuing the movement of-said firstv conveyor means to correspond;

to the reduced speedof movement of the last-mentioned conveyor means. i

17. In an apparatus ofthe class described,

a leer, a conveyor iieans'forfeeding Ware through the 'leer and divided into an e11 trance section and a continuing section, sep arate means for driving each of said sec-'- tions, means operable to alternately connect 130.

"said entrance section to said separate driving means whereby said sections may be driven first at different speeds and then at the same speed, and means for forming and 5 delivering a section of flattened glass to the entrance section ofthe leer conveyor.

18. The combination .wi'than intermittent sheet glass-,formingmachine, of a.leer -receivin glass from the forming. machine as 10 forme l the sheet rollers within the leer to receive from the forming machine, rollers with i'n the leer 1min? stant which is speed of the 'firstset of rollers may be. varied from a speed equal to that of sheet formation to'speed equal-to that of the second set of rollers. v

In testimony hereof I have hereunto subscribed my name this 23rd day of July,

1926. I I HERMAN'S. HEICHERT.

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