US1008299A - Machine for jarring molds. - Google Patents

Description

Words, by the control thus secured o'f the lexhaust, a -mole or less rapid rcciprocatory movement of the plunger Will be produced, when air is turned on throughthe supply connection a, and atthe same time 4the length of the stroke of the plunger will der pend uponthe adjustment of the lian'd- Wheel stops on the rod'. Itis contemplated that the Iair escape shallfbeshut of by the valve before the end of the down stroke,

so that by the same adjustment of the ldwerl,

most of such stops, the volume of lair con-:l Vined within the support to'deaden the jolt may be varied. A pin b9 determines the llower limit of adjustment for said stop.

In the lower endl of `the plu-nger there is mounted a head or tup a* of resistantmaterial that'is adapted tostrike the bot-A tom of the chamber Within the support on said plungers downward stroke, thereby producing the desired jarring effect. On the bottom of the chamber, moreover, there rests-an annular block ai' of Wood or the like,` which takes up the majorportion of the annular space between 'the tup and Ythe chamber AWalls in the lower position of Vsuch tup, thus in effect -providing a recess that :is adapted substantially to receivelthe latter and correspondingly diminish thel volume 0f air required the operation of the machine. A i

By reason of the horizontal disposition' of the valve that controls the 'exhaust and the substantial balancing ofthe-bell crank, as also of any friction'al resistance to the movement jof said valve, the latter is readily adapted to remain in Whatever lposition itmay be left and yet not require any particular effort-to move the samer There is hence, no liability to disarrangement of the adjustment of-:the stroke,-Whicl1, as has been explained, is 'controlled by adjusting the hand-wheel stops threaded on the rod b5. At some point inthe upward stroke ofthe piston the bracket a3 carriedby .the piston engages the handwleeel'gblwhichis 'lxedly secured to the sliding rod b5 attached vat its s lower end to the bell-crank lever` B2. o The handivheel'is thus raised, raising fthe rod. and oscillating the bell-crank aboutyits axis in the bracketb2 thusv closing the valve which is attached to the `bell-crank. 'In this Way the upper hand'wvheelcan be made to close this valve',` the inlet valve, at any desired point in the stroke by'merely adfl justing it at various levels. vIn a' similail manner the exhaust valve may the 'action of the loWerhand Wheel Iin cans'- ing another movement ofthe bell-crank lever. Thus the exhaust lvalve is' usually closed after ia certain part of the don/ni' stroke, thus imprisoning some air intheI chamber and slightly dcadening the impact.y Of such hand'wliccls, the upper it will be seen, determines the lengthl ofthe stroke,

beclosed while the lower determines the amount of air confined at the conclusion of the stroke and thus the compression provided to dcaden such stroke, the compression being increased by raising the lower Wheel. By

thus making stops in the form of Wheels, no 4wrench required to effect their adjustment, and at the same time owing to the accessibility of their position,` such adjustment may be effected even while the machine is in operation. This 4is a very des irabley feature for the reason that a nurnbe'r of trials lwould otherwise be required before exactly the desired result, in the Way of jolting effect, c ould be secured.v

The common practice, it will of course. Abe understood, involves the use of the same machine to jolt molds of different Wei hts, .up to the maximum lifting capacity o the machine. Furthermore, a variationv in the pressure ofthe air supplyavailable for operation has to be considered. In view of these conditions the practical significance I' of the foregoing features will be more read.-

ily grasped.

Other modes of applying the principle of my invention may be employed instead of 'the one explained,'change being madeas with said plunger and connected to operate said valve; two peripherally notchedfhand notches in said Wheels to retain the latter against rotation;4 andbabracket carried by said p'lnn er and projecting between said Wheels, W ereby saidplunger is adapted, during' a p rt offits movement, to operate saidyalve.- if' 2. lna machine of the class described, the combination of a vertically disposed tubular support; a plunger reciprocable 'in said VSupport-.and provided Witlra top, -said plunger l Wheels threaded on said rod; a spring borneA by the latter 'and adapted to engagethe bei/1 g-adapt'd, on its [down stroke, to stri-ke the; -bottom 4of saidsupport so object on such top; 'fluid pressure supply and exhaust connections I for "said support 'as to 'jar an a ,liorivlontally reciprocalile valve` controlling said exhaust connection; a bell-crank having one arm connected to4 reciprocate said valve; a rod .disposed parallel with said of sald bellfcrank; and a bracket carried by said plunger and adapted, during a part of its4 movement, to engage and reciprocate said rod.l y

l 3.- Iri a machine of the class described, the

combination of a lvertically disposed tubular support; a'plun r reciprocable infsaid sup- Ezrt and provi ed with a top, said plunger ing adapted, on its down stroke, to strike the bottom of said support so as to jar an object ori such top; uid pressure supply and exhaust connections for said support; ahorizontally reciproca-ble valve ,controlling said exhaust connection; a bell-crankhavone arm connected to reci rcate said va ve; a rod disposed paralle with said plunger and connected with the other `arm of said bell-crank; and a' bracket carried by said plungerand adapted, during a part of its movementfto engage and reciprocate said f y rod, said bell-crank being counter-weighted,

y substantially as described.

4. In a machine of the class described, the

combination of a vertically disposed tubular support;` a plunger reciprocable in said support, said plunger being provided with a top.; a tup at the lower end of saidplunger adapted to strike the bottom of said support on said Elungers down stroke; and an annu-' lar bloc on the bottom of `said 'chamber arran ed to-leave a recess adapted to substantial y receive said tup.

5. .In a machine of the class described, the combination of atubular support; a plunger recprocable in said support and provided with a top, said plunger being adapted,on its down stroke, to strike the bottom of said support so as to jar an object on such top; fluidv pressure supplyaud exhaust connections forl said support; a valve controlling said exhaust connection; adjustable means connectin said valve, with said plunger, but with ost motion, whereby said.` plunger is adapted, during a part of its movement,

to vanably operate said valve; .and means limiting the range of adjustability of aforesaid means.

6. In a machine of the class described, the combination of a vertically disposed tubular support, a plunger reciprocuble' in said support, said'plunger being rovided with a tcp; tup at the lower en of said plunger a apted to strike the bottom of said support on said plungers down stroke; an annular block on the bottom of said chamber urranged to leave a recess adapted to substantial y receive said` tu and means adapted to partially deaden tllie down stroke of said plunger. f

7. In a machine of the class described, the combination of a vertically disposed` tubular support; a plunger reciprocable in said support, said plunger being rovided with a to a tup at thelower en of said plunger a apted to strike the bottom of said support on said plungers down stroke; an`annular block on the bott'om of said chamber arranged to leave a recess adapted to substantial y receive said tup; by said plunger and adapted to retain a certain amount of air in said tubular support during -the down stroke 'of said plunger, whereby the force of the' impact of said plunger on said bottom is lessened.v

Signed by mey this 17th day of Ma 1910.

HARRY R. ATWA. ER. Attested by- MARY GLADWELL, J No. F. OBEBLIN.

and valves operated

Images