US966440A

US966440A - Glass-press.

Info

Publication number: US966440A
Application number: US53032109A
Authority: US
Inventors: Wallace S Graham
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-11-29
Filing date: 1909-11-29
Publication date: 1910-08-09
Anticipated expiration: 1927-08-09

Description

W. S. GRAHAM.

GLASS PRESS.

APPLIGATION FILED NOV. 29, 1909.

Patented .55ug.9,1910.v

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GLASS PRI-ISS.

APPLICATION HLBD'Nov. 29, 1909.

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W1 S. GRAHAM.

GLASS PRESS.

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WALLACE S.`GRAHAM, 0F LANCASTER, OHIO.

GLASS-PRESS.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application led November 29, 1909. Serial No. 530,321.

To all 'whom 'it may concern:

Be it known that I, WALLACE S. GRAHAM, a citizen of the United States, and a resident of Lancaster, county of Fairfield, and State of Ohio, have invented a new and useful Im rovement in Glass-Presses, of which the fol owing is a specification, the princi le of the invention being herein explaine and the best mode in which I have contemplated ap lying that principle so as to distinguish it rom other inventions.

My invention relates to machines for the manufacture of articles of glass, and particularly to that type of machine in which the article is formed by pressing a die in a mold.

In general, the objects of my invention are to provide an automatic glass press which is adapted to perform a series of similar operations in succession, each complete o eration comprising a sequence of individua operations.

Other objects of the invention will appear throughout the s ecification.

To the accomp ishment of these and re.- lated ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the following claims.

The annexed drawings and the following description set forth indetail certain mechanism embodying the invention, such disclosed means constituting, however, but one of'various mechanical forms in which the principle of the invention may be used.

In said annexed drawings Figure l is a side elevation of my machine, partly broken away and partly in section; Fig. 2 is an end view thereof looking from the left in Fig. 1; Fig. 3 is a plan thereof; Fig. 4 is a detail of an ejector; Figs. 5 and 6 are views of a cylinder and associated parts, partly broken partly in section; Fig. 7 is a det-ail of certain actuating mechanism with certain parts broken away, aild certain parts shown in dotted line; and Fig. 8 is a detail of a catch holding the shears open.

My machine comprises first a supporting plate A-which is supported by three legs A two spaced posts A2 and A3 extending vertically from the support A. The supporting plate A is in general form circular, but is provided at certain points on its circumference with outwardly extending brackets, and is also rovided with an annular aperture. A tab e B is mounted on plate A, and

is revoluble about the post A2 as its axis. A pluralit of molds b are disposed on the upper sur ace of table B, and on its periphery are provided'a plurality of inclined projections b.

Sup orted by the plate A, at the outer edge t ereof, is a vertical post c, and pivoted on this post so as to be horizontally movable, are two coperative knives C and C which are adapted to lie substantially over the circle on which the molds b are arranged. A transverse shaft c4 is carried by the post c, and to this shaft are keyed two rocker arms c3 and 011 which slidably engage two pins c and c2 which extend laterally from the knives C and C. A rocker arm c5 extends outwardly from shaft c4 to which it is fixed, and at its outer end is ivoted to a vertically reciprocable rod c which is held in elevated position by a spring c". A rocking lever o8 engages, at one end, a collar on post c, and its other end extends to a oint adjacent to the periphery of table B. ear the base on which the machine rests is a rocking lever c", one end of which engages a collar on rod c6, that end being normally heldfrinrdepressed position by a spring 01.

The post A2 extends downwardly from the table and supporting plate to the base on which the machine rests, and on this portion of the post is rotatably mounted a sleeve D. This sleeve bears at its upper end a horizontal arm d provided at its outer end with a vertically reciprocable spring-pressed bolt d; this bolt is adapted to enter spaced holes in the bottom of the table B. Keyed to sleeve D near its lower end is a rocker arm d2 which, at its outer end, engages a horizontally reciprocable rod da. (collars are provided on rod d3 on each side of arm d2, collar cle having a limited sliding movement, and on one side of the arm is a compression spring d4, and on the other side a tension spring d5. Adjacent to the post A3 is a vertically reciprocable rod (Z7. A bell crank lever d8 is fulcrumed on one of the legs A', and one of its arms engages the lower end of rod al7 while the other end engages the outer end of rod d3.

A vertically reciprocable bolt E is disposed below the table B and is adapted, in

` its elevated position, to enter holes provided A horizontal bar e2 is secured to the lower end of bolt E. A vertically reciprocablerod F has its lower end disposed adjacent to barl e2 and bears a collar which bar e2 is designed to engage. A horizontal lever f is pivoted to the upper end of rod F and is supported intermediate its ends by a standard f.

A cylinder G is disposed between the posts A2 and A3 and is attached thereto by a rod g2 which is attached to the upper cylinder head, and is held by a cross arm g. The rod g2 is threaded so that by means of the nuts g the cylinder may be vertically adj usted. A piston g i'eciprocates vertically in the cylinder, and secured thereto is a piston rod g. To one side of the cylinder is a steam chest 0 which may be connected in the usual manner with a steam supply. Ports g4 and g5 connect the steam chest with the lower and upper sides of the cylinder respectively, and the admission of steam..

through these ports is controlled by an ordinary slide valve g. Furthermore, the ports g4 and g5 are controlled respectively by valves gif and g whose stems extend transversely through the ports. It is evident that by means of the valve stems of valves g1 and g, the opening in the ports through which the fluid pressure may pass may be eliectively controlled. The stem g7 of the slide valve g is pivoted to the end of lever f opposite the end to which rod F is pivoted. A small cylinder K is mounted on the upper cylinder head of cylinder G and has a piston vertically reciprocable therein, the piston rod 7c of which is pivoted to lever f on the same side of the fulcrum thereof that the valve stem gl is pivoted. A passagek? connects the upper side of cylinder G with the under side of cylinder K, and this passage is) controlled by an upwardly opening valve lc. The valve Ic is normally held to its seat by a spring; the casing is provided with an upper member k3 threaded into the valve casing, and against which the upper end of the spring abuts. Obviously the tension of the spring may be varied by means of the member 7:3, so that the valve may be regulated to open at any predetermined pressure. In the passage k2 is a needle valve le, by Whicht-he size of opening in the passage may be'denitely controlled. A plunger H is secured to the lower end of piston rod g by means of the pivoted jaws h and nut h which is threaded on the piston rod. A plate la? is supported adjacent to the plunger by means of a plate k3 which is vertically adjustable upon the piston rod, bolts h5 connecting plates h2 and h3.

In each mold b is an ejector L which is secured to the upper end of a vertically reciprocable rod Z, this head and rod being normally free to assume a position in which the head lies at the bottom of the mold.

Supported by a bracket extending outwardlyl its inner end adapted to lie substantially over the circle on which the molds'are arranged. Arranged below slideway M is a vertically reciprocable rod m and adjacent to post A2 is a second vertically reciprocable rod m2. Rocking lever m engages at its two ends these two rods m and m2, the end of the lever adjacent to rod m being normally depressed by a spring.

The mode of operatlon of my machine may now be described. In its inoperative state, the knives are opened, being so held by a suitable manually operable catch. The inner end of leverc9 is thereby held in raised position and engages collar d6v on rod da so that the springs on that rod are held in set position. The bolt E is held in its depressed position, the rod F is depressed, and i' the slide valve is thereby admitting steam to the lower port so .that the piston 1s at the top of its stroke and the plunger is raised. The piston in small cylinder K is also in raised position. The operator of the machine now drops a suliicient amount of lass into one of the molds which is dispose directly beneath the knives, and at the same time he releases the catchwhichl is holding the knives in open position. The closing of the knives severs the .glass in the mold from the mass from which it is supplied. The closing of the knives, by means of the rocker arms, raises rod c which depresses the inner end of lever c", thus releasing the springs on rod d?. The action of the springs is to swing the rocker arm connected therewith, and thus rotate sleeve D which by its bolt at its upper end engages and rotates the table B a portion of a revolution. During this revolution of the table, one of the cam projections b engages and raises the inner end of lever c?, thus depressing rod c". The knives are thus opened again, and the lever of. is again reset. At the end of its partial revolution, one of the cam projections slides back the catch e and the bolt E rises and engages and stops the table B. At the same time by means of the bar attached thereto it elevates rod F which depresses the slide valve and admits steam through the upper port. The plunger is thus depressed into the mold, forming the article which is being manufactured. When the required pressure to thoroughly press the plunger into the mold is exerted, any excess pressure in the cylinder will open the passage Way into the small cylinder and raise the piston therein. This in turn raises the slide valve so that the upper port of the main cylinder is closed, steam is admitted on the undervside, and the plunger is raised. When the plunger was depressed, rod (i7 which is attached to the cross head was depressed, and by means of the bell crank lever moved the rod d3 inwardly, where the collar d was caught and held by lever c". lVhen the plunger was raised, the rod d3 was moved outwardly again, compressing the springs, thus setting the springs for the next operation. The machlne has thus completed the cycle of its operation and the result is, for instance, a common tumbler which, however, the operations so far described have left in the mold. During the next ,cycle of operation similar to the one described, the mold into which'the plunger has been depressed during the last cycle will be advanced a partial revolution of the table. During this advance, the rod Z is engaged and raised by an inclined bracket m3 which is carried by alever m. The rod and ejector push the tumbler up from the mold into the end of slideway M. When the plunger is being depressed into the followino' mold, the cross head carries downwardly with it the rod m2 which by means of the lever and second rod raises the pivoted slideway M so that the tumbler E,slides off into any suitable receptacle.

It is finally to be noted that my improved machine lends itself to accurate adjustment in several ways. It is important that the speed with which the plunger descends or rises from the mold be accurately controlled. The glass must be made to flow into its molded form within a proper time. If thev ilow should be too rapid, defective pressure marks in the resulting article will be caused,

j and if too slow, the glass will chill too rapidly and an imperfect article will be produced. The valves in the inlet ports to the cylinder render the speed of descent and elevation of the plunger entirely subject to the operators control. Furthermore, the plunger must not only press the glass into the mold at thev proper speed referred to, but it must exert its pressure in the glass in the mold a correct length of time, and no shorter time, nor longer time will produce a perfect article. If the pressure should be exerted through too long a period, the heat conductivity from the" glass being molded will tend to crack the glass, While if too short, the insufficient heat loss will cause a consequent distortion of the article. The period during which the plunger thus exerts its pressure upon the glass may be accurately predetermined by regulation of the valve c, so that when any given pressure is exerted by the plunger, an excess of pressure inthe cylinder will open the valve and raise the piston. Finally, the needle valve 7c* permits adjustment of the passage k2 so that the period of time may be predetermined in which such excess pressure may escape through said passage and raise the piston in the secondary cylinder.

It is seen, then, that my machine is adapted to completely form any required article from molten glass into a finished article. Its operations are entirely automatic with the exce tion of the manually 'operable catch Cwhich holds the knives in open position. It is desired that this be manually operable in order that the operator may have complete control of the machine, and although this machine is adapted to perform this cycle of operations entirely automatically, it has been so designed and arranged as to avoid much of the complexity whlch is usual in automatic machines.

Other modes of applying the rinciple of my invention may be em loye instead of the, one explained, change eing made as regards the mechanism herein disclosed, royided the means stated by any of the folibwmgclaims or the equivalent of such stated means be employed,

I therefore particularly point out and distinctlfl claim as my invention 1. n a machine of the class described, the combination of a suitable support; a revoluble table; a plurality of molds carried by -the table; normally inoperative glass severing means arranged above the table; normally inoperative means for revolving the table and adapted to be rendered operative by operation of the severing means; means operable by revolution of the table and adapted to return the severing means to its normal position during such revolution; means operable by revolution of the table for stopping such revolution; and vertically reciprocable plunger means above the table.

2. In a machine of the class described, the combination of a suitable sup ort; a revoluble table; a plurality of mo ds carried by the table; normally inoperative glass severing means arranged above the table; normally inoperative means for revolving the table\ and adapted to be rendered operative by operation of the severing means; means operable by revolution of the table and adapted to return the severing means to its normal position during such revolution; means operable by revolution of the table for stopping such revolution; a vertically reciprocable plunger adapted to be depressed by operation of the sto ping means; and means for elevating the p unger.

3. In a machine of the class described, the combination of a suitable support; a revoluble table; a plurality of molds carried by the table; normally lnoperative glass severing means arranged above the. table; normally inoperative means for revolving the table and adapted to be rendered operative by operation of the severing means, revolution of the table being adapted to return the severing means to its normal position during such revolution; means operable by revolution of the table for stopping such revolution; a vertically reciprocable plunger adapted to be depressed by operation of the stopping means; and means for elevating the plunger.

4. In a machine of the class described, the combination of` a suitable support; a revoluble table; a plurality of mo ds carriedby the table; normally inoperative glass severingsuc revolution; means operable by revo- ,lution of the table for stopping such revolution; a vvertically reciprocable plunger adapted `to be depressed by operation of the stopping means; and means for elevating the plunger, reciprocation of the plunger being adapted to return the means for re- A,volving the table to its normal position and elevation of the plunger being adapted to render the sto ing means inoperative.

5. In a ma ine of the class described, the

,combination oa-suitable su port; a revoluble vv,tablel provided on its periphery with cam projections; a plurality of molds carried by the table; normally inoperative means for .revolving lthe table; coperative knives piv- `oted above the table about a vertical axis, a ,vertically reciprocatory rod adjacent to the axis, .a transverse rotatable shaft, levers fixed thereon and connected with said knives, a leveriixed on said shaft and connected with saidrod, a spring tending to raise said rod ,and thereby. clo'se said knives, a lever connected at one end with said rod and adapted .to have its .other end raised by the cam projections on the table, a lever attached at one end to said rod and its other end being adapted, when said rod isdepressed, to hol the means for revolving the table inoperative, and a catchoadapted to hold the knives in open position; means operable by revolu- -tion of the table for stopping such revolution; a vertically reciprocable die adapted to be depressed by operation of the stopping fmeans; and means for elevating the plunger, reciprocation of the lunger being adapted to .return the means or revolving the table o to its 4normal position and elevation of the die being adapted to .render the stopping means inoperative.

6. In amachine of th'e class described, the vcombination of a suitable sup ort; a revoluble table; a plurality of mo ds carried by 55. the table; normally inoperative lass severvmg means arranged above the ta le; a rotata lefshaft, an arm fixed to the shaft and adapted to engage the table in one direction,

a horizontally reci rocable rod, an arm fixed to fsaid. shaft an slidably connected with Asaid rod, a spring on said rod ltending to move said arm, means connecting` said arm with the severing vmea-ns and adapted to allow movementof the arm only on operation of the severing means, and revolution of the table being adapted to return the sevnormally inoperative means for revolving'l the table and adapted to be rendered operative byV operation of the severing means, revolution of the table being adapted to return the -severing means to its normal position; a vertically reciprocable rod ada ted in its upper position' to retain the ta le against revolution, and a catch operable by said cam projections and normally retaining said rod 1n its lower position; a second vertically reciprocable rod adapted to be elevated by the rst rod and to depress the iirst rod by. its

own depression, a ever ivoted at one end to said second rod, a iiui pressure cylinder, a piston reciprocable therein, a iston rod provided with a 'plunger at its ower end, said cylinder being rovided with inlet ports above and below tiie piston, a slidevvalve controlling said ports, and a stem for the Valve pivoted to the other end of said lever; means for elevatin the valve, means operable by reciprocation of the plunger and adapted to return the nieans for revolving the table to its normal position. M

8. In a machine of the class described, the combination of a suitable support; a revoluble table provided on itswperiphery Withcam projections; a plurality of molds carried by the table; normally inoperative glass severing means arranged above the table; normally inoperative means for revolving the table and adapted to be rendered operative by operation of the severing means, nevolution of the table being adapted to return the severing means to its normal position; a first vertically reciprocable rod adapted in its upper position to retain the table against revolution, and a catch operable by said cam projections and normally retaining said rod in its lower position; a second vertically reciprocable rod adapted to be elevated by the first rod and to depress the first rod by its own depression, a lever pivoted at one end to said second rod, a fluid pressure cylinder, a piston reciprocable therein, a piston rod provided with a plunger at its lower end, said cylinder being provided with inlet ports above and below the piston, a slide valve controlling said ports, a stem for the valve pivoted to the other end of said lever, a second cylinder connected with the rst cylinble table; a plurality of mol s carried by the table; normally inoperative lass severing means arranged above the ta le; normally inoperative means for revolving the table; meansfor operating the last named means and adapted to be rendered operative byoperation of the severing means, means operable by revolution of the table and adapted to return the severing means 'to its normal position; means operative by revolution of the table for stopping such revolution; a vertically reciprocable plunger; means operative by the stopping means for depressing said plunger; means for elevating the plunger, reciprocation of the plunger being adapted to return the means for revolving the table to its normal position, and elevation of the plunger being adapted to render the stopping means inoperative; rods reciprocable through said molds and normally tending to assume their lowermost positions, a pivoted guide having its free end adjacent to one position of said molds, a lever havin one end depressible by depression of sai plunger, a rod connected with said guide and with the other end of said lever, and an inclined track provided' on said lever and adapted to engage said rst rods.

10. In a machine of the class described, the combination of a suitable support; a revoluble table; a plurality of molds carried by the table; a fluid pressure cylinder, a piston therein, said cylinder being provided with inlet ports above and below the piston and with an outlet, a rod attached to the piston and provided with a plunger at its lower end, a sl1de valve controlling said inlet ports', a lever, a stem for said valve and pivoted to,one end of said lever, a second cylinder, a piston therein, a rod attached to the piston and pivoted to said lever adjacent to said valve stem, a passage'connecting the first cylinder above the piston with the second cylinder below the piston, a valve in such passage openin toward the second cylinder, and means or elevating the free end of said lever.

11. In a machine of the class described, the combination of a suitable support; a revoluble table; a plurality of molds carried by the table; a fluid pressure cylinder, a piston therein, said cylinder being provided with inlet ports above and below the piston and with an outlet, means for varying the opening through said ports, a rod attached to the piston and provided with a plunger at its lower end, a slide valve controlling said inlet ports, a lever, a stem for said valve and pivoted to one end of said lever, a second cylinder, a piston therein, a rod attached to the piston and pivoted to said lever adjacent to said valve stem, a passage connecting the first cylinder above the piston with the second cylinder below the piston, a valve in such passage opening toward the second cylinder, means for regulating the opening in said passage, and means for elevating the free end of said lever.

12. In a machine of the class described, the combination of a suitable support; a revoluble table; a plurality of molds carried by the table; normally inoperative glass severing means arranged above the table; normall inoperative means for revolving the ta le and adapted to be rendered operative by operation of the severing means; means o erable by revolution of the table for stopplng such revolution; a vertically reciprocable plunger adapted to be depressed by operatlon of the stopping means; means for elevating the plunger; rods reciprocable through said molds and normally tending to assume their lowermost positions, a pivoted guide having its free end adjacent to one position of said molds, a lever having one end depressible by depression of said plun er, a rod connected with said guide and with the other end of said lever, and a cam provided on said lever and adapted to engage said irst rods.

Slgned by me this 29 day of October,

. WALLACE S. GRAHAM. Attested b W. H. Curran,

ROBERT L. FRINK.