US1190145A

US1190145A - Automatic centrifugal glassware-making machinery.

Info

Publication number: US1190145A
Application number: US4972915A
Authority: US
Inventors: Benjamin Franklin Gift
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-09-09
Filing date: 1915-09-09
Publication date: 1916-07-04
Anticipated expiration: 1933-07-04

Description

B. F. GIFT.

AUTOMATIC CENTRIFUGAL GLASSWARE MAKING MACHINERY.

iAPPLiCATION FILED SEPT. 9. 191 5.

' 1,1 90,1 45. Patented July 4, 1916.

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Patenfed July 4, 1916.

B F. GIFT.

APPLICATION FILED SEPT 9| 19 15.

WITNESSES ra f/ B. F. GIFT.

AUTOMATIC QENTRIFUGAL GLASSWARE MAKING MACHINERY. APPLICATION F ILED SEPT. 9. 1915.

1 1 90, 1 45. Patented July 4, 1916.

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B. F. GIFT.

AUTOMATIC CENTRIFUGAL GLASSWARE MAKING MACHINERY.

APPLICATION FILED SEPT. 9, I915.

1,1 90,1 45. Patented July 4, 1916.

5 SHEETS-SHEET 5.

BAA 4 6E/IR/A/6 f/ C 5 (My finja vm'nl T g ff A TTORNEIS BENJAMIN FRANKLIN GIFT, OF DUNKIRK, INDIANA.

AUTOMATIC CENTRIFUGAL GLASSWARE-MAKING MACHINERY.

Application filed September 9, 1915. Serial 170.49,?29.

To all whom it may concern Be it known that I, BENJAMIN F. GIFT, a. citizen of the United States, residing at Dunkirk, in the county of Jay and State of Indiana, have invented certain new and useful Improvements in Automatic Centrifugal Glassware-Making Machinery, of which the following is a specification.

My invention relates to the art ofmaking glassware by the utilization of the action of centrifugal force .andconsists .in the construction and operation of parts hereinafterde'scribed and claimed.

The principal object of my invention is to provide a machine for shaping molten glass into Ware of various shapes by the action of centrifugal force and to turn the shaped glass-ware out in a finished state.

Another object. is to provide an intermittently rotatable mold carrying table on which independently revoluble molds are mounted. Suitable mechanism operates the table and molds at such predetermined times that a batch of molten glass when deposited in a mold, is carried through various stages of formation until it finally assumes the shape of the finished ware. It is then discharged from the mold at the place of delivery and taken oif by an attendant.

Another object is to provide an interchangeable molding ring. This ringis seated on the brim of a mold during certain stages of the formation of the glassware. It is then remove? by the attendant and placed on the brim o the mold in advance of the one from which it was removed for a purpose to be explained.

-Another object is to provide a blank plunger which is adapted to momentarily contact with the batch of molten glass so as to chill the centerand set the heft from which the surrounding molten glass spreads to' form the article in formationby the action of the mold in its subsequent stages of operation.

Another object is to provide shears which co-act with the blank plunger. The purpose of the shearsis to cut the glass from the punty after the glass has been dropped into the mold.

Another object liesv in the provision of mechanism for operating-the device by hand.

' Such an instance, mayoccur'whenit is desired to make an initial trial of the mold. At such time it isdesi'r'able to temporarily dispense with the mechanical motive power.

Specification of Letters Patent.

Patented July 4, 1916.

With other objects in view which shall hereinafter be made apparent the construcillustrated in the accompanying drawlngs in which- Flgure 1 is a perspective view of the de vlce, Fig. 2 is a front elevation, a part being broken away. Fig. 3 is a plan. Fig. i is a section on line 44' on Fig. 3. Fig. 5 is a detail section on line 55 on Fig. 4. Fig. 6 is a detail section on line 66 on Fig. 5. Fig. 7 is a section on line 77 on Fig. 3. Fig. 8 is a detail view of the mutilated gear wheel. the changeable speed sprocket. Fig. 10 is a section of one of the molds. Fig. 11 is a cross section on line 1111'on Fig. 10. Fig.

12 is a detail section of one side of one of the molding rings. Fig. 13 isa vertical section showing the application of a jointed mold. Fig. 14 is a plan view of the stud plate. Fig. 15 is an inverted plan view of the divided mold. Fig. 16 is a cross section on line 16l6 on Fig. 13.

Attention is now directed to Fig. 1 of the drawings, in which 1 designates a base on which the molding mechanism is mounted. The base 1 carries axles 2 on which wheels 3 are mounted and render the base 1 and its carried mechanism, easily portable. Secured to the base 1 and centrally thereof, is a fixed standard 4 which, as shown in Fig.4, may be hollow so as to lighten it. The standard 4 is provided with a vertically extended dove-tailed groove 5 at one side in near its periphery w th a ball-race 8. Bearing balls 9 are placed in the race 8 and support an intermittently rotatably mold carrying table 10. The table 10 has a central aperture 11 in which the hub 12 of the standard 4 is located. This structure insures a steady and even motion of the table 10, when it rotates. The table 10 is'pro vided on its under side with a bevel-gear 13 (see Fig. 4). Arranged at suitable intervals near the periphery of the table 10 and adjacent to the gear 13, are circular apertures 14 in each of which a bearing sleeve 15 is rotatably mounted. The sleeve 15 has an annular collar at the top and'is provided with a ball race on the under side.

Fig. 9 is a detail sectional view of.

Bearing balls'lfioare located in the race formed in the collar of the sleeve 15, and a similar race in the upper face of a boss 17 which is a part of the table and through which the aperture 14 also passes (see Figs. 4 and 10) The sleeve 15 has a central bore in which a shaft 18 is reciprocatably mounted. The shaft 18 has a longitudinally extended key 19 at one side which fits into a key-slot which is in turn milled in the bore of the sleeve 15. The key and slot permit the vertical movement of the shaft 18 at certain times and also serve to turn the bearing sleeve P5 with the shaft 18. Detachably secured to the collar of the sleeve 15 is a mold 20 which is of that shape to which it is desired to mold the glass-ware. In this instance it is of a nappy. The mold 20 has a central valve seat 21 in which a valve 22 is seated The valve 22 is formed on the shaft 18 and closes the seat 21. At the time when the article of glass-ware is completely formed in the mold 20, the shaft-valve is lifted and in so doing, raises the glass nappy out of'the mold when it can be taken off by an attendant. The mold 20 is slowly revolved on its axis at times and at other times is rapidly revolved. This is accomplished through the medium of the pinion 23 mounted on the shaft 18 near the bottom thereof. The key 19 serves to hold the pinion in place. The centrifugal force generated by the rotation of the mold-20, acts on the molten glass batch within the mold and causes it to spread upwardly or outwardly on the sides and thus form the article. The ring 24 seats on the brim of the mold 20 and forms the abutment which. limits the upward or outward flow of the molten glass under the centrifugal action of the rotating mold. The ring 24 has an annular groove 24 which closely fits on the correspondingly shaped brim of the mold. The ring 24 is removed by the attendant after the formed glass article is chilled, and placed on a similar mold 20 in advance of the one from which the ring is removed. There are five molds employed in this form of my invention, and four rings. After the ring 24 is removed, the molded glass article is free to be lifted from the mold 20 as before explained. The mold carrying table 10 is intermittently rotatable and at such times when it comes to rest, the table is held by a latch 25 which engages an opening 26 in the under face of the table. The opening 26 has a grooved approach so that the latch 25 is admitted gradually (see Fig. 7) The latch 25 is pivoted at 27 to the casting 7 (see Fig. .4 also) and has a downwardly extended heel 28 which is engaged and lifted at the time when the table 10 is about to be again rotated. The weight of the heel 28" keeps the latch 25 in contactwith' the under face of the table 10.

Mounted in suitable bearings 29 on the base 1, is a drive shaft 30 on which a pulley 31 is keyed. A belt 32 takes over the pulley 31 and over a smaller pulley 33 on the shaft of a motor 34, which drives the mechanism. The drive shaft 30 is extended at one side and is provided with another pulley 35 whereby the mechanism may'be operated from an overhead line shaft. Such an instance may occur when it is desired to operate a plurality of molding machines at one time, and at such a time the motor 34 is dispensed with. A bevel bear 36 is mounted in the opposite end of the-shaft 30, (see Fig. 1) and meshes with a pinion 37 which is keyed to the lower end of a vertical shaft 38. The shaft 38 is suitably mounted in a bearing 39 which is supported from the central standard 4. to the upper end of the shaft 38 and serves a purpose presently to be explained. Mounted on the end of the base 1 adjacent to the shaft 38, is a gear segment support 41 on the upper end of which a segmental gear 42 is fixedly secured. The pitch line of the gear 42 which radiates from the center of the standard 4, coincides with the pitch line of the adjacent gear the object in this arrangement being presently made clear.

I Fig. 3 shows the pinion 23 on the shaft 18 as just having engaged the segmental gear 42. A charge of molten glass is deposited into the mold 20 at this place. As the table rotates, the mold is also rotated by reason of the engagement of the pinion 23 with the gear 42. As soon as the pinion leaves the segmental gear 42 it is engaged by the gear 40 and in order that the interlocking'of the gear teeth may readily be effected, the pitch lines of the two

gears

42 and 40 must coincide radially.

Mounted in a bearing 43 on the standard 4, (see Figs. 1 and and in a bearing 44 on a bracket 45, is the counter-shaft 46. The shaft 46 is providedwith a large sprocket 47, at one end over which a chain 48 takes. The chain isdriven by a sprocket pinion 49 on the drive shaft 30 which pinion is composed ofthree sets of teeth each set being of a different pitch diameter so that the desired one may be engaged by the chain 48 when it is desired to alter the speed of rotation of the shaft 46. The bracket has an upwardly extending bearing arm (see Fig.

2) in Which is mounted a plunger operating shaft 50. The shaft 50 is provided with a bevel gear 51 at its end nearest the standard 4, and is provided with a spur gear 52 at its opposite end. Secured to the outer end of the shaft 46, i'sa mutilated gear wheel 53 (see Fig. 2). Y The wheel 53 has a bevel gear 54 whichmccupies approximately ofthe rim of the wheel, the remainder thereof being blank. When the gear surface 54 en gages the bevel gear 13 on thetable 10, then A spur gear 40 is keyed a trip 55 which is adapted to strike against the heel 28-of the latch and move it on its pivot 27 and thus retract the latch 25 from y the opening 26 in the under face of the table. The table is then free to rotate. Located in advance of the gear segment 54, and at the side of the wheel 53, is an internal spur-gear 56." The gear 56 is arranged at a lesser distance from the center of the wheel 53, than is the bevel gear 54, and the quadrant 56 is adapted to engage the spur gear 52. When this occurs, the slide 6 in the standard 4, is lowered. A rack 57 is formed on the lower end ofthe slide 6, (see Fig. 4) and is constantly engaged by the bevel pinion 51 on the shaft 50 but the shaft 50 does not rotate until the quadrant 56 engages the pinion 52 on the shaft 50, at which time the shaft 50'is rotated and the slide 6 is lowered in consequence. The shaft 50 is supported at its end adjacent to the pinion 51, in..an. extension of the bearing 43 (see Fig. 3).

A laterally extended arm 48 (see Fig. 4)

formed with the slide 6, is provided with. an internally threaded boss 49. The threaded shank of a blank plunger .60 -is located in the boss 49 and-held in place by a check-' nut. The plunger may be adjusted vertically by turning the head 61 after having loosened the check nut. The plunger 60 is adapted to make a rapid descent after a batch of molten glass has been deposited in the mold 20 directly under it, the plunger arm 48 and pluhger 60 being located at the place Where themolds are charged withmolten glass in sequence. The purpose of the above acti n will. be hereinafter made plain. A colla 62 is secured to the standard 4 and the collar has an opening 63 adjacent to the slide 6. enough to permit the movement of the slide 6 therein and also that of a chain 64. The chain 64 is secured to the slide 6 at .a place beneath the table 10 and runs over an idler 65 which is mounted on the. collar 62. The chain 64 is then secured to the retractor arm 66 of the shears mechanism. The collar 62 has a rounded forward extension 67 around which .a stout spring 68 is coiled. The spring 68 abuts the base of theextension 67 and the retractor 'head 69 and tends to push the head 69 forwardly. Secured to the extension 67 is the central arm of av shears guide 70. The shears guide comprises parallel arms 71 and 72, (see Fig. 5) which converge as at 73 at their forward ends and unite with the arm which supports them.

The arm 70 is notched at a place near its base as at 74 to permit the entrance of the The opening 63 is large properly chilled.

end of a pivoted latch 75, (see Fig. 6).

Mounted in a bracket on the retractor head 69, is a bell-crank 76. The bell-crank 76 is pivotally secured to the outer end of the latch and is weighted at its other end as at 77, the purpose of the weight being to keep the latch in contact with the arm 70.

An arm 78, secured to the collar 62 (see .Fig. 1) supports a trip lever 79 which has an inwardly turned end 80. The outer end of the trip lever 79 is bent at right-angles as at- 81 and forms a convenient tappingplace for the attendant. The inwardly turned end 80 of the trip lever rests against the under side of the bell-crank 76 and when the attendant wishes to release the latch 75 from the notch 74, he taps the end 81 of the trip lever 79 with his punty or other convenient instrument which thus releases the latch 75 from the notch 74 and the head 69 may then spring forwardly.

The arm 66 is turned down as at 82 and forms a bearing support for the blades 83 of an automatic shear. Each blade'83 is extended rearwardly beyond the pivot 82 and which are forced into contact with the adjacent arms 71 and 72 by a spring 85 which is interposed between the heels 84. The spring spreads the blades 83 of the shear.

lVhen the trip 75 is released, the head 69 and the shear blades carried thereby, spring forwardly being thus impelled by the coil spring 68. lVhen the heels 84 engage the converging portions 73 of the arms 71 and 72, the shear blades are forced together and cut the molten glass from the operators unty with which the glass is deposited in t 1e mold. The operator or gatherefi touches the trigger 81 at the moment he wishes the glass cut. This occurs just before the plunger 60 lowers into the mold. The slide 6 and its carried parts is returned to its normal position after the pinion 52 disengages the gear 56 by a spring 86 which is connected to the top of the slide 6 and to an arm 87 (or any other fixed part) The nozzles 90 are placed in a suitable position so that the air may be blown on the newly formed glass article so that it, may be Mounted on one end of the base 1- is a support 91 on which a track 92 is mounted. The track 92 is bent downwardly at the; ends so that the rounded ends of the valve shafts 18 may easily' ascend and descend as they come into position. This track 92 raises the shafts 18 and lifts the finished glass articles from the molds 20.

The track '92- is adjustable. The standard or support 9101? the track 92, is divided at the center, the lower part 99 forming the ba e of the support. The base 99 is provi ed with bolts 100. The standard 91 is provided with a slot 101 into which the bolts 100 project. Whenthe bolt nuts are tightened, then the standard 91 becomes fixed but when the nuts are loosened, then the standaid and track 92 may be lowered. The track is lowered at times, for a purpose about to be explained.

Figs. 13 et seq. illustrate a modification in the mold structure wherein a provision is made for the use of a jointed mold instead of a block or solid mold, as in the preceding figures of the drawings.

, In order to adapt the glass-molding machine to the usef'of jointed molds, .the valve 22 shown in Fig.110, is removed. In this case, the valve 22 is unscrewed. A studplate 102 is screwed on the end of the shaft 18, in place of the valve 22; the plate 102 is screwed down until it grips the sleeve 15 tightly so that it will not become loosened by the vibration of the machine. The plate 102 1 has a plurality of short studs 103 which are The studs 103 hold the mold 20 in place during the rotation of the mold. When the hold has passed through the variousstages of its, travel and reaches'the placeof discharge of the formed glass blank from the mold, then the mold is opened by the at tendant and the glass blank -is removed. When jointed molds are used in my machine, the track 92 is lowered so that it will not obstruct the passage of the projecting shafts 18. In the block form of mold, the contact of the end of the shaft 18 with the'track 92 raised the glass blank from the mold. Since the. modified jointed mold does not require this last named operation,the track is lowered out of the way, as explained. Pivoted to thetable 10 near the :periphery' thereof and adjacent to each of 'the'molds 20, is a One end of the bell-crank has an upwardly extended handle 94 while bell-crank 93.

the other end is provided with a 'latch'95. The bell-crank 93 is held in one direction by a spring96. 4 4 When it is desiredto operate the molding mechanism by hand the wheel 53 is loosened andslipped back on its shaft 46. The

latches 95 are adapted to engage the forked upper end 97 of a fixed bar 98, under the above condition, and the latches 95 will hold the table 10 to its position. These hand released locks are used when the operator desires to try out the molds and may be swung back in any suitable manner out of the way of the forked end 97 so that the normal operation of the device is not interfered with.

Having thus described my. device, theoperation is as follows: The making of finished glass-Ware by my device is accomplished in one operation which comprises 5 steps. The first step is to deposit a batch of molten glass into the mold 20 at the place marked charge in Fig. 1. This is done by the operator who takes a quantity of molten glass on his punty and drops the glass into the mold. As he holds the punty over the mold, he lightly touches the trigger 81, thus releasing the head 69, of the shears mechanism, and the shears 83 are caused to spring forwardly and close, thereby cutting the glass from the punty. The table 10 remains stationary during this'performance and the pinion 23 onthe shaft 18 is in engagement with the segmental gear 42.

Immediately after the batch of molten .glass is deposited into the mold 20, the

quadrant 56 will intermesh with the gear 52 on the shaft 50 and the slide.6 which carries the blank plunger 60 will be rapidly lowered into the mold. The plunger, then contacts the molten glass and in chilling the center heft. is set from which the surrounding molten glass spreads to the edge pf the mold during the subsequent operations. As the plunger 60 descends, the chain'65 which is connected to the slide 6 at one endand the retractor head 69 at the other end, will pull the block 69 rearwardly and withdraw the shears 83 from the path of the downwardly moving plunger 60. The shears are re-set. in this manner, for the next operation. After the gear 52 hasbeen transversed by vthe quadrant 56, the gear,

is released therefrom and the spring pulls the slide 6 up and retracts the blank plunger 60 from the mold. Shortly after .the quadrant 56 leaves the gear 52, the trip 55 releases the latch 25 from the opening 26 in the, table 10. The table 10 is then free to rotate. a

The second step in the formation of the glass article occurs when the segmental bevel gear 54 engages the annular bevel gear 13 on' the table 10., This causes the table to rotate and since the pinion 23 on theshaft 18 is in intermesh with the fixed gear segment 42, the shaft 18 and mold 20 w ll be revolved at a moderate speed. This initial rotary motion of the mold prevents vthe glass from flowing to the center. I

The third step occurs after the pinion 23 has traversed the stationary gear segment me 42. As soon as the pinion 23 leaves the gear 42, it immediately intermeshes with the rapidly revolving gear 10. The shaft 18 and mold 20 are now rapidly rotated and themolten glass is caused to spread or flare up the side of the mold until the ring 24 on the brim of the mold is reached; The table 10 is at rest during. the above centrifugal operation since the latch 25 comes into engagement with another opening 26 in the table directly after the pinion 23 disengaged the gear 42. I

The fourth step brings the mold 20 to a position under the air nozzle 90, where the glass article is cooled. Here an attendant removes the ring 2-1 from the brim of the mold 20 and places it on the mold just in advance of the charging position.

The fifth step consists in raising the article out of the mold. This is accomplished when the shaft 19 ridesupon the track 92 which causes the valve 2:? to be raised, lifting the glass article with it. The article is now in its finished state, and has the polished surface and smooth edges which is now gotten only by laborious and costly processes. The raised article is now set off by the attendant. The next movement ofthe table 10 allows the valve 18 to ride off of the track 92 and the mold is now in that position where, it will receive the ring 24 from that mold now under the cooling nozzle.

The machine operates continuously while the motor 34 is running and each movement is performed whether the molds contain a batch of molten glass or not. V

I claim 1. In a centrifugal glass molding machine, a base, a standard mounted on said base, a rotatable table mounted on said standard, a centrifugal mold carried by said table to receive a batch of glass, means for chilling the center of the batch to form a heft, and means for revolving said mold during certain stages of the rotation of the table whereby to cause the glass to flow upwardly on the sides of the mold from the said heft.

2. In a centrifugal glass molding machine, a base, a standard mounted on said base, a rotatable table mounted on said standard, a centrifugal mgold carried by said table to receive a batch of glass, means for chilling the center of the batch to form a heft, and means forrevolving said mold at different speeds successively during certain stages of the rotation of the table to.

cause flow of the glass upwardly in the mold away from the said heft.

3. In a centrifugal glass molding machine, a' base, a standard mounted on said base, a stationary gear segment supported from said base, a constantly revolving gear adjacent to the stationary segment, a rotating table mounted on the aforesaid standard, a centrifugal mold carried by said table to receive a batch of glass, said mold-having a dependent shaft and a pinion mounted on said shaft, a chilling plunger movable into the mold centrally of the batch of glass to form a heft, and means for bringing the mold carried pinion into engagement with the stationary segment and the revolving gear successively, for the purpose described.

4. In a centrifugal glass molding machine, a portable base, astandard mounted on said base, a rotatable table mounted on [said standard, a stationary gear segment supported from the base and positioned beneath said table, a constantly revolving gear adjacent to the stationary segment and in an equal plane therewith, a centrifugal mold carried by the rotatable table to receive a batch of glass, said mold having a shaft downwardly dependent through said table, a

pinion mounted on said shaft and disposed in an equal plane with the aforesaid stationary segment and revolving gear, a chilling plunger movable into the mold centrally of the batch of glass to form a heft, and means for rotating the table so as to bring the mold carried pinion into successive intermeshing engagement with the stationary segment and revolving gear.

In a glass molding machine, abase, a standard mounted on said base, an intermittently rotatable table mounted on said standard, a stationary gear segment sup ported from the base and positioned beneath said table, a constantly revolving gear adjacent to the stationary segment the pitchv lines of the segment and gear being in radial coincidence, a. mold carried by the totatable table, said mold having a shaft extending downwardly through the table, a pinion mounted on said shaft said pinion being adapted to engage the stationary-segment and the. revolving gear successively as the table rotates, and means for intermittently: rotating. the table.

6. In a glass molding machine, a base, a standard mounted 'on said base, an intermittently rotatable table mounted on said standard, a mold carried by the rotatable table said mold having a shaft extending downwardly through the table and a pinion mounted on said shaft, a stationary gear segment supported, from the aforesaid base and positioned in an equal plane with the base, a drive-shaft mounted thereon, means for rotating the drive-shaft, a standard mounted on said base, a counter-shaft supported on said standard, said counter-shaft being driven from said drive-shaft, a table mounted on the aforesaid standard, said tablehaving an annular bevel gear on the underside thereof, a centrifugal mold carried by said table to receive a batch of glass, I

a mutilated gear mounted on the aforesaid counter-shaft adapted to mesh with the annular table-carried bevel gear intermittent-1y, a chilling plunger movable into the mold centrally of the batch of glass to form a heft, and means for revolving said mold at different speeds in succession at certain stages of the intermittent rotation of the table.

8. In a glass molding machine, a portable base, a drive-shaft mounted thereon, means for rotating the driveshaft, a standard mounted on said base, a counter-shaft supported on said standard, said counter-shaft being driven from said drive-shaft, a table mounted on the aforesaid standard, said table having an annular bevel gear on the underside thereof, a mold carried by the rotatable table said mold having a shaft extending downwardly through the table and a pinion mounted onsaid shaft, a stationary gear segment supported from the aforesaid base and positioned in an equal plane with the aforesaid pinion, a vertical shaft having a gear, said gear being positioned adjacent to the stationary segment and having its pitch line in radial coincidence with the'pitch line of the gear segment, said vertical shaft'being driven by the aforesaid drive-shaft, said mold carried pinion being adapted to be moved into engagement with the stationary segments and revolving gear successively as the aforesaid mutilated gear engages the annular tablecarri'ed gear.

9. Ina glass molding machine, a base, a standard mounted on said base, a revolving table mounted on said standard, a stationary .gear segment beneath said table, a rapidly revolving gear adjacent to the stationary gear segment, molds carried by the aforesaid table, said molds having pinions positioned in an equal. plane with the segment and gear,

'11. In a glass molding machine, a base, a standard mounted on said base, arevolving table mounted on said standard, a mold carried by said table, a counter-shaft supported on said standard beneath the table, a mutilated gear wheel mounted on said countershaft, means cooperative with the wheel for lowering the blank plunger into the mold, and means for retracting the blank plunger from the mold.

12. In a glass molding machine, a base, a standard mounted on said base, a revolving table mounted on said standard, a mold carried by said table, a counter-shaft supported on said standard beneath-the table, a. mutilated gear wheel mounted on said countershaft, means cooperative with the wheel for lowering the blank plunger into the mold, and means for retractingthe blank plunger from the mold, said means comprising a spring. 7

13. In a glass molding machine, a base, a standard mounted on said base, said standard having avertical slot, a slide mounted in said slot, said slide having a rack, a blan'k plunger carried by said slide, a revolving table mounted on said standard, a mold carried by said table, a counter-shaft supported on the aforesaid standard beneath the revolving table, a quadrantmounted on said counter-shaft, a plunger operating shaft, said shaft having a pinion at one end adapt ed to engage the aforesaid slide rack, and a gear mounted on the other end of the plunger operating shaft, said gear being located in the path of the-aforesaid quadrant.

14. In a glass molding machine, a portable base, a drive-shaft mounted thereon, means for rotating the drive-shaft, a standard mounted on said base, a countershaft supported on said standard, said counter-shaft being driven from said drive-shaft, said standard having a vertical slot, a revolving table mounted on said standard, a mold carried'by said table, a slide mounted in said slot, said slide having a rack, ablank plunger carried by said slide, a plunger operatingshaft'mounted adjacent to the counter-shaft,

said counter-shaft having a quadrant, a pinion mounted on the plunger operating shaft adapted to constantly mesh with the slide rack, a gear mounted on the opposite end of the plunger operating shaft, said gear being engaged by the quadrant, intermittently to lower the blank plunger slide into the mold and a spring secured to the plunger slide to retract the plunger from the mold when the quadrant and gear disengage.

15. In a glass molding machine, a portable base, a drive-shaft mounted thereon, means for rotating the drive-shaft," a standard mounted on said base, a counter-shaft suported onfsaid standard,'said counter-shaft eing driven from said drive-shaft, a rotatable table mounted on said standard, said table having an annular bevel gear on its under face, a mold carried by said table, a casting mounted on the standard beneath the table, said table having notches in its under face, a latch pivoted on the casting, said lat ch being adapted to engage one of said notches, sa1d latch having a heel, a mutilated gear mounted on the aforesaid counter-shaft,

and a tripmounted on the mutilated gear in advance of the teeth thereof, said trip being adapted to engage the aforesaid latch heel to releasethe latch from the table notch.

16. In a glass molding machine, a base carrying a standard, mounted on said standard, a mold carried by said table, a support secured to the standard, a bar secured to said support and hav-' ing a guide, a head slidableon said bar, a spring interposed between the head and the support, shear blades supported by said head and engaging said guide and movable with the former to closed position, a latch normally holding the head retracted against the pressure of thespring and supporting said shears in open position, and means for releasing the latch and permitting closing movement of the shears in said guide and with said head.

17. In combination with the mold of a glass molding machine, a shearing' device mounted on a support above said mold, said device comprising a bar secured to said support, said bar having a notch, a head slidable on said bar, a spring interposed between the head and the support, parallel frame members disposed at either side of said bar, said frame members having converging front ends, shear blades supported by said head, said shears having heels engaging the aforesaid parallel frame members, a latch pivoted on the aforesaid head adapted toengage the notch in the bar when the head is retracted, and a manually operated trigger for.releasing the latch from the notch when the shears are to be closed.

18. In combination withthe mold, of a glass molding machine, a support carrying a head and positioned above said mold, said,

support having a notch, a spring interposed between the head and the support, shear blades=supported from the head, said blades having downwardly turned heels, a frame arranged parallel to the aforementioned support, said frame having converging front ends, a coil spring interposed between the heels of the shear blades, adapted to contact the heels with the parallel frame, a latch pivoted on the aforesaid head adapted a rotatable table to engage the notch in the support when the head is retracted, a manually operated trigger for releasing the latch from the notch so as to project and close the shear blades,

ed boss, said arm being attached to said slide, a blank plunger adjustably stationed 1n said threaded boss, a rack located on the aforesaid slide, a pinion engaging said rack adapted to lower the slide at times, a shearing device attached to said standard, and means for retracting and opening the shear blades actuated by the loweringof the plunger slide.

20. In a glass molding machine, a base, a standard mounted on said base, an intermittently rotatable table carried by 'said standard, a mold carried by said table, -means for initially rotating the mold at a normal rate of speed, other means for subsequently rotating the mold at a high rate, and means wherebythe speed of rotation of the table and the initial rotation of the mold may be varied. a

21. In a centrifugal glass machine, an intermittently rotating table having a receiving station, a plurallty of centrifugal molds spaced apart around said table andeaoh of means for slowly rotating each of the molds as it leaves the receiving station upon m1- tial rotation of the table, and means for imparting speedy rotation to each mold when the next successive mold is at the receivin station.

22. n a centrifugal glass machine, a mold having an upwardly and outwardly flaring wall provided with a limiting ring around its upper end, means for chilling the central portion of amass of,molten glass dlsposed in said mold whereby to form a heft, and means for rotating said mold with 1ts axis in a vertical position during such rotation whereby to force the molten glass from around the heft upwardly along the mold Wall to said limiting ring by the centrifugal force of such rotation. v

BENJAMIN FRANKLIN GIFT. Witnesses: I

' CHARLES M. HIGMAN, CHARLES E. LEAsUnE.

' which receives glass at the receiving station,