US1317115A - Necticut - Google Patents

Description

G. E. WHITNEY.

PRESS.

APPLICATION FILED DEC.4.1916- 1,317,1 15, PatentedSept. 23,1919.

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G. E. WHITNEY.

mss.

APPLICATION FILED DEC. 4.1916- 1 ,3 1 7, 1 1 5 Patented Sept. 23, 1919.

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G. E. WHITNEY.

PRESS.

APPLICATION FILED 050. 4. 19m.

Patented Sept. 23, 1919.

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GEORGE E. WHITNEY,-OF BRIDGEPORT, CONNECTICUT, ASSIGNOR T INTERNATIONAL PAVEMENT COMPANY, OF HARTFORD, CONNECTICUT, A CCRPORATION 0F CON- N ECTICUT.

PRESS.

To all whom it may concern Be it known that I, GEORGE E. WHITNEY, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented an Improvement in Presses, of which the following description, in connection with the accompanying drawings, is a specifica tion, like characters on the drawings representing like parts.

This invention pertains to an improvement in presses and more particularly to improvements in molding press'es'of therotary mold type. One of the principal difiiculties attending the operation of said presses is to produce uniform intermittent partial .unidirectional rotation of the revolving mold carrying table or head. The principal obstacles to be overcome are the intermittent engagement of the rotary mold table by the mold table operating means and to secure accurate stoppage of the mold table during its periods of rest, so that the mold table may register accurately with the mold filling means, under which the plurality of molds carried by the mold table are usually successively brought in register.

It is among the objects of my invention to solve the difficulties above referred to and to this end I provide certain novel mechanisms which are typified by one embodiment of a preferred construction of my invention, as shown in the drawings.

As the present invention relates more particularly, but not exclusively, to mold table operating mechanism, I have elected to disclose my invention in connection with a type of press shown and described in Patent No. 1,174,212, issued March 7, 1916.

Referring to the drawings, which show one illustrative embodiment of a preferred construction of my invention,

Figure 1 is a side elevation thereof;

Fig. 2 is a plan view thereof;

Fig 3 is a sectional elevation thereof, taken, on the line 33 of Fig. 2;

F a is a section partially broken away on the line l'1 of Fig. 2; and

Fig. 5 shows a detail of the valve operating mechanism, which will be hereinafter described.

Referring to Fig. 2, I have shown a bed plate carrying a pressure fluid cylinder 11 having a piston therein connected by a piston rod 12 to a displacing plunger 13 Specification of Letters Patent. Patented Sept, 23, 1919 Applicationfiled December 4, 1916. Serial No. 134,891.

adapted to displaoeliquid in a cylinder 14, thereby to impart compressive movement to a ram 15 in the same general manner, as shown in'my earlierPatent No. 1,174 21.2.

Mounted on the bedplate :10, I preferably provide a single cycle timing shaft 20, which may be and preferably is drilvcnby a gearing 21-22 from aadriving shaft 23, to which power may be imparted by a pulley 2% driven from any suitable source of power.

The pressure system and power system, before described, form noxpart of the pres ent invention .and arenot herein illustrated nor described.

Rising from bed plate 19, I preferably provide a mold carrier supporting column 30, on which is rotatably mounted the mold carrier 31 having a plurality of molds 32. Above the mold carrier 31 I preferably provide an abutment 33 carried by the columns 3-l35 provided with a pressure bl0ck 36(Fig. 3) adaptedto close the top of that mold which is above the ram 15. Each mold may be and preferably is provided with a mold plunger 37, each reciprocable in its mold and rotatable with said mold table 31. Above the mold:table 31, I preferably .provide a mold filling neck orconduit 38.

The before described instrumentalitie's may be and preferably are very similar to those shown in my patent previously-referred to. I will now describe a preferred construction of the improved mold table operating means, which constitutes one form of constantly engaged turret'moving means. I preferably provide a gear 40 concentric .with, and preferably attached to, the rotatable mold table 31. Said gear 40 is preferably constantly engaged with a mold table driving pinion tl which is keyed toa mold table driving shaft 42 adapted to receive intermittently effective I rotary movement from pressure fluid actuated instrumentalities, more fully described hereafter. The mold table driving shaft 42 may extend through the pinion ll into a bearing 43 carried by the abutment 33, and the lower end of said shaft 42 may be provided with a bearing 44- on the bed plate 10 of the press. Keyed to the shaft 42 preferably adjacent the bottom end thereof, I may and preferably do provide aworm gear 45 adapted to be driven by a worm 46 directly connected to the shaft 47 of a pressure fluid engine 48,

' the valve mechanism of which will be more fully described hereafter. Through the before described train. offgearin'g, the Vmold table 31 will be rotated as and when the rotary movement is imparted to the crank shaft 47 of the engine 48-.

The moldrtable operating instrumentalities, before described, must be effective to impart intermittent partial rotation to. the

pref

mold 'table 31, each partial rotation erably-being the exact distance between two i adjacentmolds'of the mold table 31. To this 1 .end I may and preferably do make the gear table 31' an amount of movement exactly equal to the distance between two adjacent molds of the mold table. 7 I V 7 While it is not essenti'l fo'rall' purposes 0f my invention that the gear 40bear the ratio to the pinion 41, above mentioned, it

is necessary that the amount of rotation- V imparted to the pinion 41 at each cycle of operationof the press be exactly the same.

It is 7 also essential that' such movement the timed withrelation to the per ods :of operation of the compressing instrumentalities a andother cooperating instrument-alities of the press. To thls endlfprovldemeans on .the timing shaft 20 of the press typified by the cam 50, which constitutes one form of timing means for the mold table operating means. 7

The, pressure fluid engine 48 is preferably 7 'multi-cylindered and may be'as shown, provided with two cylinders 51-51 with" pistons 52-52, piston rods 53 53 and-connecting 'rods-54-454 engaging the cranks 47-47 of the crank shaft 57. The cylinder 51 is provided with a slideival've 156 having its exhaust cavity somewhat longer than is :operation'of the turret moving engine 48.

-'1 preferably" provide, however, means for stopping said engine which is not depend- -ent onmovement of the timing shaft 20, but

the usual construction, such additionallength beingpro'vided so thatwhen the: slide valve 5 6 is "inthe central position, both-ends of H the cylinder 51 'will be exhausted to the at;

' side lap The slide valve 55 of the cylinder 51 is'preferably without any substantial out of the usual proportions, so that both ends of the cylinder 51 cannotbe exhaustedwhen the valve is in central :position. :Each of the slide' valves 55 and 56 isprovided with an eccentric of the usual constructionon the crank shaft 57, so that when said slide valves are reciprocated ,by said eccentric, the pressure fluid engine will impart unidirectional clockwise'rotation to the turret 31. i

To provide for stopping and starting the turret; 1 preferably provide a link connection 60 between'the slide valve. 56 and its eccentric and link connection 61-. between the slide valve 55 and its eccentric. The

extreme lower position. 7 7 58 -433 are connected to the shaft by centric V V 1 Thus one revolution of. :the driving pinion 41 impartswto the mold-- and the exhaust cavity is preferably through an interposed links 60 and 61 are pirovidedivith dead'rods thelatter being adapted to hold the former to hold the slide valve 5 5 in its The dead rods connections.

"Referring now I the. mechanism for shiftingthe links 60- 61 to start and stop the, pressure fluid engine. The movement of the valve controlling links -60-6'1' from theposition shown in Fig. 3 to theleft to start thejengine, isactuated by the timingcam 50 on the timing"- shaft 20 wl'ii'chrocks the lever 70, fulcrumed at 71 on the bedplate 10. Said lever is connected get its upper end by-v a rod 721W1tl1 a'lever 73, fulcrun'ied ona rocker shaft 74 and conpnected atitslower end'through the connection 75 to the valve controlling link 60. :Similar connectionsv between the rocker shaft 74' and the link 61 provide for shift ing of the'latterlinkin unison with the shiftingof. the link- 60: When the links- 60'61 areshifted to the left from the posito Fig. 3, 1 wiilfdescribe tion shown i1'1Fig.'3, the connectionibetween ithe eccentrics and the" slide yalves immediately becomes operat ve to reciprocate the latter, thereby admitting steam to the cylindersto cause operation of-the engine.

Conversely, when the links 60'61*are; e

shifted'to theright, the lengths of the dead rods are such that theengine is stoppedor locked, because the slide valve 56 .is held in central position, thereby exhaustin'gboth ends of the cylinder 5 1 while the-slide valve 55 is held in its downward position,

thereby I admitting full steamv pfressureto' thetopof the cylinder 51. ;Thelinks 60-61 V v 77 onthelsha'ft 42,said cam 77 rocking the "lever 78"which engages a an arm 79011 the rocker shaft 74.

are shifted to the right by meansvof a cam The-timing shaft 2-0 thus initiates the which is controlledby an element actuated *by'the'turret moving engine and to thisend flxhaveiprovided the-lever 76 on the shaft 7 '7 4, said lever .76: thereby constituting-in effect an offset extension of the lever 73, said by a cam '77 ontheturretmoving shaft 42 links to the, right in position to stop-the engine." V F zThus the valve'mechanism of the pressure fluid engine 48-is shifted to operative position' by means connected to the timing shaft 1 QOjand; is. shiftedto nonoperative position v 1 by means-actuated by the'eng1ne=48,1 the I latterineans being in effect controlled by the amount of movement given to the meld table .on the resistance to rotation of the turret.

By the described independent .means for initiating thestartingmf-the engine 48 and for producing stoppage thereof,:the amount of time during whichtheienginemayrun at each movement of the turret may vary, but the number of revolutions which it will make during such period'will bev constant, thereby insuring accurate positioning ofthe turret at each stoppage :thereof. It will be noted that by:the foregoing arrangement I have provided turret moving means which constantly engagesathe turret, thereby eliminating thedifiiculties usually attending the alternate connection anddisconnectionof a constantly moving turret operating element with the turret. The-engine .47 will always start when the valve controlling links 60 and 61 are shifted to valve operating .position because the cranks are set .at 90 thereby eliminatingdeadcenter. To permit sudden stoppage of the engine, I preferably omit the usual fly wheel thereby rc ducing the inertia attending .the sudden stopping and starting of :the engine. To permit rapid operation of the press, I may provide such a ratio of'gearing between the crank shaft 47 andthe turret 3'1 as will permit rapid turning-of the turret 31 without increasing unduly the speed of operation of the pressure fluid engine 48.

lVhile I have shown in the'drawings and have described :one specific embodiment of a preferred construction of my invention,

it willbe understood vthilt my invention is not limited sto-tthe .embodiment shown and described, but that major changeszinvolving omissions, substitutions,:alterations and rearrangement of'parts, may be madewithout departing :from the scope of my invention, which is Fbest defined by the following claims:

Claims.

1. A molding press comprising in combination an intermittently, step by step rotatable pressure :fluid actuated mold table; and pressure fluidactuated operating. means constantly operatively connected to said mold table during periods1of motion and rest of said 'mold table and transmitting every movement ofsaid'operating means to said table.

'2. A molding'press comprising ineombination an intermittently, step by step roti /table mold table; and pressure fluid actuated operating means constantly operatively connected to said mold table during periods of motion and rest of said mold table and transmitting'every movement of said operatingmeans to said table.

3. In a molding press a combination of an intermittently,rstep by step rotatable mold table having a plurality of molds; a gear constantly operatively connected thereto, a pinion constantly meshing with said gear; and pressure fluid actuated operating means for said pinionconstantly operatively connected thereto and transmitting every movement of.said"operating means to said table.

4.111 a molding press a combination of an intermittently, step by step, rotatable mold table having a plurality :of molds; a gear constantly operatively connected thereto; a driving means :constantly engaging said gear; and pressure fluid actuated operating means for said driving means consta-ntly operatively connected thereto and transmitting every movement ofsaid operating means to said table. i

5. In a molding press a combination of "an intermittently, step by steprotatable moud table having a. plurality'of molds; a gear constantly operativelyconnected thereto; a pinionconstantly engaging said gear; pressure fiu'idope "ating means for said pinion constantlyoperatively connected thereto; and automatic timing means for said operating means.

6. In a molding press a combination of a rotatable mold table having a. plurality of molds; a gear-constantly operatively connected thereto; a pinion constantly engaging said gear; operating means for said.p1n-

ion constantly operatively connected there to; timing means for said operating-means including a starting element actuatedby the timing shaft of said press and a stepping element actuated by said actuating means.

.7. A molding press comprising in combination a rotatable mold table; operating means therefor permanently, operatively 'connectedto' said mold table; timing means 'for said operating means, includingmeans operated by the timing shaft of said press for initiating'movement of said operating means; and means actuatedby said operating means for stopping movement thereof.

8. A moldingpress comprising in combination a rotatable mold table; pressure fluid actuated operating means therefor permanently, operatively connected to said mold table; timing means for said operating means, including means operated by .the timing shaft of said press for initiating movement of said operating means; and means actuated by said operating means for stopping movement thereof.

9. A molding press coi'nprising in combination a rotatable mold carrier having a plurality of molds; a pressure fluid engine for start said'engine movement of said mold table mine'd point.

tion and rest of said pressure'fluid engine and of said mold table. n v A a t 11. A molding press comprisingin combination a mold table; 'a pressure fluid actuator therefor; gearing constantly connected to said pressure fluid-actuator and to said mold table during both the periods of movement and of'restiof-said mold table;and timing means for said pressure fluid errgine,-including means for'shifting'a valveelement of said engine into stopping position to stop said engine andautomatic means to shift said valve into starting position to 12. A moldingjpress comprising in combination a mold table having aplurality of molds and intermittent mold table operatingv means including a pressure fluid. cylinder; its piston and valve means for admitting pressure fluid to said cylinder and retaining pressure fluid against one side of said piston to prevent momeiitumactuated at a predeter- 13. A press having an intermittently'step by step rotatable mold table; an actuator for said mold table; and constantly, connected power transmitting means operatively interposed between said actuator, and sa1d mold table and transmitting every. movement of saidactuator to'said mold table. 1

'14. A press having an intermittently rotatable mold table; a" yielding actuator therefor; a positive constantly connected train of gearing intermedlate sald yreldlnjg 1 actuator and said table and'constantly connecting the two; and "timing means for timing the periods of operation of said yielding actuator relative to thecooperating instrumentalities of said press, w

' 15. A molding press comprising in combination a rotatable mold table and pressure fluid means for actuating intermittent: par-i tial unidirectional rotation of said" mold table and for holding said mold table stationary in a predetermined position, said-pres sure fluid means starting and stoppingfor every movement of said mold'table.

' 16. A molding press comprising in combination' rotatable mold table; a nlilltl the engine after a said engine; and means for shifting said valve to stop said engine.

17. A molding press comprising in combination a rotatable moldtable; a multicylinder engine for efl'ectingrotation of said mold table; a pressure fluid controlling valve for one cylinder of saidengine; means for operating said valve during operation of said engine; and; link means for shifting said valve 'to stop said engine;

'18. A molding press comprising in combination a rotatable mold table; a multicylinder engine for effecting rotation of said mold table; a pressure fluid controlling valve for one cylinder of said engine; means for operating said valve during operation of said engineanda link connection between said means for operating said valve and said valve providing one position for oper- 'ating the engine and another position for locking said engine after a predetermined number of revolutionsi r 19. A molding press comprising in combination a rotatable mold table and a pressure fluid engine for efl'ecting intermittent rotation of said mold table; saidpressure fluid engine being provided With valve mechanism and link mechanism controlling said valve mechanism, including a link having one end connected to an eccentricconnection and the otheri'end' connected to a centric connection. I 1 r 20; .A molding press comprising in combination a rotatable moldtable and'a pres sure fluid engine for eflecting intermittent rotation of said mold table; saidpressure fluid engine being provided With valve mechanism and link mechanism controlling said valve mechanism, including a link having one end connected to an eccentric connection to opera-tethe engine and the other end connected to a centric connection'to stop theengine. 2135A molding press comprising in combination a rotatable mold table and a pressure fluid engine for effecting intermittent rotation of said mold'table; said pressure fluid engine being provided With v-alve mechanism and link mechanism controlling nection to operate the engine and the other end connected to a centric-connection'to stop predetermined number of revolutions thereof. 5

- 22. A molding press comprising, in combination, an intermittently rotatable mold table; pressure fluid actuating means for imparting step-by-step rotation to" said table and. constantly connected thereto; and saw said valve mechanism, including a link havmg one end connected to an eccentric conmatic timing means for starting and stop ping said pressure fluid actuating means and to start and stop said table A molding ress comprising, in combination, a rotata le mold table; pressure fluid means for effecting s'tep-by-step, intermittent, unidirectional rotation of said mold table and for opposing momentum-actuated eXcess movement of said mold table.

24:. A molding press comprising, in comtuated by the timing shaft of said press.

In testimony whereof, I have signed my name to this speclfication.

GEORGE E. WHITNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0.

It is hereby certified that in Letters Patent No. 1,317,115, granted September 23, 1919, upon the application of George E. Whitney, of Bridgeport, )onneetieut,

appears in the printed specification for animprovernont in Prosses, an error requiring correction as follows: Page 5, line 2, claim 22, [or the word and rend thereby; and that the said Letters Patent should be read with this correction therein that the some may conform to the record of the case in the Patent Oflico.

Signed and sealed this 21st day of October, A. D., 1919.

[SEAL] M. II. COULSTON,

Acting Uomomt'sioner of Patents.

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