US1617577A - Assembling mechanism for casting machines - Google Patents

Description

Feb. 15 192 7 E. CARLSON ASSEMBLING MECHANSM FOR CASTING MACHINES 4 sheets-snm 1 Filed April l4. 1926 Feb. 15 1927.

E. CARLSON AssEMBLING MECHANISM F013 CASTING MACHINES Filed April 14, 1926 4 Sheets-Sheet 2 Feb. 15 1927. 1,617,577

E. CARLSON ASSEMBLING MECHANLSM FOR CASTING MACHINES Filed April 14. 192e 4 sheets-sheets 4 Sheets-Sheet 4 E. CARLSON www Filed April 14. 1926 Feb.` 15 1927.

Patented Feb. 15, 1927.'

UNITED STATES `PATENT oFFlcE.

ERIC CARLSON, OF CHICAGO,- ILLINOIS, ASSIGNOR TO STEWART MANUFACTURING CORPORATION, F CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

ASSEMBLING MECHANISM FOR CASTING MACHINES;

Application led April 14, 1926. Serial No. 101,854.

The purpose of this invention is to provide a means for assembling a desired nurnber of plates which are to be eventually held permanently 'in parallel relation by securement or partial imbedmentin a die castin g, particularly designed for assembling the plates of an electric condenser and the like which is, to be completed by casting the plate-retaining metal vabout. a corresponding portion of all plates. lt consists 1n the elementsand features ot construction shown and described as indicated in the claims.

In the drawings Figure 1 is a side elevation of the upper part ot a machine embodying this inventionu Figure 2 is a front end elevation of the machine.

Fiofure f1 is a. vertical section at the line '-1--4- on Figure 1.

Figure 5 isa horizontal section at the line. 5 5 on Figure 1. e

Figure 6 is a. plan view oi a condenser \elemcnt comprising plates of one 'torni which the machine is adapted to assemble in a die member in which the devcie is to be completed by casting.

Figure. 7 is a section at the line 7--7 on Figure (l. l Figure H is a View similar to Figure t', showing a condenser elementl (fo-.operative with the condenser element. shown iu Figure (i.

Figure 9`Iis a section at the line 9 0 on Figure 8.

Figure 10 is a front elevation of a die member to be carried in the machine 'lor being loaded with the )lates and masking the portion of them wlnch is not to be enclosed in the casting when said die member with the plates assembled init is associated with the remainderlot the die for the. casting process.

l-`igure. 11 is a section at the line 11--11 on Figure 10, showing indotted lines the plates as4 they are to be inserted by the machine. 4

Figure 12 is a section at the line 12-12 on Figure 10, cutting through one ot the plate-receiving slots ot the die member. and

showing a plate in the position 'in which it will be inserted in the slot by the machine.

Figure 13 shows in side elevation several.`

interchangeable cams, and Figure 14 shows similarly several corresponding interchangeable ratchet disks, said cams anddisks to be interchanged in the machines according to the nlunber of plates to be assembled in the die member according to the number of slots with which the die member is provided for receiving the plates.

The machine shown in the drawings comprises a carrier for a die member indicated at A in Figure 1 and seen in Figures 10 and 11, which is adapted to be mounted in the machine for being loaded with the plates to be carried with said die member in the die in the casting process by which the condenser element is completed, and a magazine shown at B inl Figure 1 for containinga pile ot the plates D which it is the function of the machine to assemble in the die member, lwhich latter is formed for enclosing and masking all of the area of said plates except the small portion thereof whic-h is to be imbedded in the metal. to be cast around that portion in the die. The function and operation ot the machine consists in thrusting the plates` one by one, into the apertures with which the die member is provided, dimensioned for drive it ot the plates therein. And the machine for that purpose comprises means for carrying the die member. step by step, past the plane oF the support of the pile of plates in the magazine, halting it a'lter each step with one of the plate-receiving` slots registered with the bottom plate of the pile, and, during the halt', thrusting the bottom plate by means of a thrust bar into the slot, the thrust bar withdrawing atter the thrust while the die member is advanced to bring the next slot in registration With the next plate of the pile which descends by gravity to the plane ot the thrust bar ready for the next thrusting movement. The machine is constructed for automatically giving the die member and the thrust bar the movements described in thepropcr alternation, and for returning the die member to original position when it is fully loaded and automatically halting the mechanism for removal of the die member in substitution of another die member to be similarly loaded with plates.

The structure-in detail may be described .as follows It comprises a l' rame structure consisting ot the base frame, 10. and an upper frame, 11, mounted upon the base frame, both Llll l'ramcs being shown as metal castings. C represents conventionally an electric motor mounted in the base frame. 'having its shaft extending out to the lett hand side of the trame and carrying a pulley, 14, which drivesI a belt, l5, passing around a. pulley, 16, journaled toward the rear end ot' the base frame, a slack take-up pulley, 17, being provided carried by a lever frame, 18, on the pivotal shalt, 19, mounted in the base frame, the take-up being ell'ected by a counter-weight indicated at ITL on the longer arm ot the lever frame. `ligid with the pulley, 16, is a small pulley, 20, about which a belt, 2l, extends to and about a pulley', 22, which is journalcd on a tubular bushing, 23, mounted in the left hand side web ot' the upper frame, 1l, and constituting a journal bearing ot a shaft, 24, which extends across the trame protruding at the left hand side l'or carrying a clutch collar, 25, co-operates with a clutch member, 22, formed on the hub of the pulley, 22, for deriving from the pulley, 22, rotary driving t'or the shaft, 24, thc two clutch members being engaged and disengaged as hereinafter described.

On thc shaft, 2--l-, there is made fast inside the upper trame, l1, an eccentric, 26, and outside said frame a crank wheel, 27. With the eccentric, 26, there is associated an eccentric link connection, 2H the link extending upwardly and being connected at its upper end wit-h a bell crank lever, 29, tulcrumed on the l'rame as seen at 30, and having its upwardly extending arm, 31, connected to a slide, 37, for reciprocating a thrust bar, 32, which is mounted for sliding on a slideway, 33, provided at the upper end ot' the forward part ot the trame, 11. The connection from the bell crank for operating the thrust bar consists of the link, 34, adjustable as to its operative length by screwing through 'unts, 35 and 36, at its opposite ends, the nut, 35, being pivoted to the lever arm, 31, of the bell crank lever, and the nut 36, being mounted also pivotally on the end of the thrust bar carrying slide, 37.

The crank Wheel, 27, has a crank wrist, 40, connected by a forked pitman, 41, with a pair oli' lever arms, 42, 42, which are mounted' lor oscillation upon a shaft, 43, journalcd in the frame and carrying between said leverarms, a ratchet disk, 44, said lever arms` 42, carrying on the pivot otl the forked lever to said lever arms, a pawl, 45, which is pressed in a spring, 46, toward the periphery ot the ratchet disk for engaging with the ratchet teeth thereof to rotate the ratchet Wheel' and thereby the shaft, 43, one step upon each reciprocation ot' the pitman at each revolution of the sha-ft, 24. Fast on the shaft, 43, inside the frame there is secured a cam wheel, 50, having its cam edge eccentric in successive steps, 50, 50", 50, etc., progressively increasing in eccentricity in the reverse ot the direction of rotation of the cam Wheel with theshat't, 43, the angular extent of the eccentric stops of the cam corresponding to the. angular interval bet-Ween the ratchet teeth ot' the ratchet Wheel, 44, but dropping ottl at the last step from the maximum to the initial eccentricity as indicated at 55.

ln the upper frame member there :is mounted for vertical reciprocation a "arrier,

60, for the die member, A, said carrier having journaled between downwardly projecting lugs, 6l, 61, a cam roll, 62, which rides upon the periphery of the cam disk, 50, whereby the rotation of the cam lifts the carrier, step by step, throughout the increasing eccentricity of the cam steps to the maximum, the roll, 62, dropping oil' from the cam at its maximum eccentricity back to the point of least eccentricity as the carrier descends by gravity after having been lifted, step lby step, to the highest point for which the cam is constructed.

From Figures 6 and 8 it will be seen that the plates, D, are formed with dove-tail notches, (l, into which the metal Hows inthe casting process, effecting a secure engagement of eachplate with the hub or stem,

D1, by which they are reta-ined in proper l assembled relation for the purpose of an electric condenser element.

-In Figures 13 and 14 are shown int-erchangeable cams, 50, and corresponding interchangeable ratchet disks, 44, which will he substituted in the machine by selection according to the number of plates to be assembled in the diel member, and for which the latter has a corresponding number o'l slots. The interchange of ratchet cams and ratchet disks is facilitated by the detail construction shown, consisting in that the shaft, 43, is withdrawable upon slacking the set screw, 50, which secures the cam, 50, as to its position longitudinally of the shaft, 43, a key, 50h, serving to secure it for rotation with the shaft. f

For the function of the clutch, 22, 25, the clutch collar, 25, is feathered for sliding on the shaft, 24, the necessary distance for engaging and disengaging the clutch teeth; and it is peripherally grooved at 25 4tor engagement of a lork, 3H, which terminates an arm, 3S, which is carried on the lei't hand end olil a shaft, 46, which extends through the frame, 11. having at its right'. hand end a cross handle, 46, for operating it, and to co-operate in locking it as bereinafter described. A spring, 47, coiled on the shaft, 46, between its bearing in the left hand side of the trame and the hub of the arm, 38, reacts for holding the clutch member, 25, out of engagement with the member, 22a. On the right hand side of the frame, 11, there is `fulcrumed atl 51 a lever,

- 52, whose longer arm extends in the direc- Cri tion to be engaged behind the cross handle, 46, of the clutch operating shaft, 46, when the shaft. is at withdrawn position for engaging the clutch; and a spring, 48, is provided attached to the frame and to the lever, 52, for holding the lever in the position shown in -Figure l behind said cross arm at the withdrawn position of the shaft, 46.. The

. shorter arm, 52, of the lever, 52, terminates inan abutment, 52h, which is positioned in the plane-of rotation of a disk-like flange, 43", formed integrally on the shaft, 43, and having a cam projection, 43", which encounters the abutment, 52", in the last step of the rotation of the ratchet disk and cam,l and by saidI encounter rocks the lever, 52, out of engagement with the cross handle, 46, thereby releasing the shaft, 46, and causing the spring, 47, to operate for thrusting the shaft in the direction for disengaging the clutch,- which disengagement, it will be understood, occurs vupon the completionof the last upward step movement of the car-- rier, 60,.and While the carrier is descending as, the cam roll, 62, moves down 'along the slope, 55, of the cam to the initial position at the start of the first or lowest eccentricity. of the cam.

The operationl of the machine may be ,understood from the foregoingr description, but may be further indicated as follows:

The die member-'to be loaded with plates 'having been selected and mounted in the carc rier, 60, and a cam, 50, and a ratchet disk,

44, being selected,` having the number of cam steps and ratchet teeth corresponding to the number 'of slots'in the die member, and heilig placed in position on the shaft, 43, the necessary number of plates being placed in the magazine, ll, the machine is startedfby the operator pulling the clutcl1.'sl1'ifting (it)A lever shaft 46 outwardly and thereby moving the clutch member, into position for' engaging the co-operatin clutch member 22il on the hub of the pu ley, 22, which is in revolution, being driven by the motor; and thereupon the clutch members becoming engaged, and the machine is operated in all its parts, causing the thrust bar, 32, to eject from the`- pile of plates contained in the magazine, the bottom plate which lies immediately in advance of the thrust bar and in registration with the uppermost slot of the die member, into which, accordingly, the plate is thrust to the limit of the stroke of `the thrust bar, which is also the limit of' the slot in the diecmember. During. the `retraction of the thrust bar Which immediately follows its. operating stroke, the first cam `eccent'rioity comes into operation for uplifting the carrier, 60, carrying the 'die member up one step, and bringing the A next slot into registration with the next plate of the pile which, upon the complete retraction of the thrust bar, has fallen with the descent of the entire pile, into the place vacated by the ejected plate, and thereupon, the operation is repeated; and upon each succeeding revolution of the shaft, 24, giving a step movement to the ratchet disk and to the cam, an additional plate is thrust from the pile into thev die member until the last or lowest slot of the die member is filled in the final step of rotation of the cam disk by which it arrives at the original starting position, the cam projection, 43, on the flange, 43", encounters the abutment, 52h, of the short arm of the lever, 62, causing the lever to be rocked, and its longer arm to be Withdrawn from behind the cross handle, 46a, of the clutch operating shaft, 46; whereupon the spring, 47, reacts for disengaging the clutch, and the machine slows downwhile the cam roll, 62, on the carrier, 60, Which co-operates with the cam, is descending along the edge, 55, of the lcam to initial position at the commencement of the lowest cam eccentricity, 50, and the machine comes to rest vwith the parts at initial position, ready for repetition of the cycle of movements upon the substitution of another die member for the one which is now full loaded withplates and ready to be remove The belt, 21, is provided with a slacktake-up pulley, 39, carried by a frame, 39, on a pivot shaft, 39h, and operating on the belt by gravity.

For the purpose of preventing over-actuation of the ratchet disk44, and shaft, 43, at each pawl stroke, and especially to insure that the parts coming to rest at the completion of the cycle of the cam, 50, there is provided a friction brake device comprising a pair of arms, 65, 65, mounted loosely on the right-hand end of the shaft, 16, of the pulley, 16, which shaft protrudes slightly for that purpose, said arms extending alongside the ratchet disk, 44, and! having friction pads, a, which are pressed against the` opposite sides of the disk by a spring, 66, coiled around the shaft, 16, between the ends of the arms, 65, 65, and reacting to spread. said ends of the arms apart, a die bolt 67, mounted inthe frame being extended through said arm, 65, and having outside the arms respectively, adjusting nuts, 68, which, being screwed toward each other, form fulcrums for the arms respectively, over which' they pivot for pressing the pads toward each other against the ratchet disk under the reaction of the springs spreading apart the opposite ends of the arms. v

Although the formation of the die member, in which the plates are assembled by this machine, constitute no part of the present invention, it may be noted that this die member is 'preferably .built of la'min and llO Lili

spacer strips for forming between the laminee the slots whose width is the thickness of the spacer strips, and that the lamin thus spaced for forming the intervening slots, Vare each spaced substantially in conformi with the face o f Vthe plates to be entere between them, as may be seen at 71 in Figure 5, wherein the lower 'laminas at the slot at which the section is made, is seen and indicated at 7l,

1. Ina machine for the purpose indicated in combination with a frame structure, a' reciprocable carrier for a die member and thelike, a magazine for plates to be mounted in the diemember, a reciprocable thrust-bar for ejecting the plates, one by one, from the` magazine'into the die member; operating meansY for advancing the die member carrier transversel with respect to the position of the plates 1n the magazine, operating means for reciprocating the thrust bar, a power shaft and connections therefrom for actuating the carrier-operating means and the thrust bar operating means adapted to time said' movements in alternation with each,

other for first positioning the die member with its plate-receiving openings in alignment with the thrust bar, and next operating the thrust bar.

. 2. In the construction dened in claim l, the carrier actuating means being. a cam progressively stepped, and means for moving' thesame step by step, the cam steps being dimensioned correspondingly to the pacing of the plate-receiving openings bf the die menfiber.`

-3. In the -camstruetion defined in claim 1, the carrier actuating means Vbeing a rotatebie cam having circumerentially seccessive steps increasing in eecentricity progressively in the reverse of the direction of rotation; a ratchet wheel mounted. for rotation with the cam and a reciprocating pawl for actuating the ratchet wheel to rotate the cam step by step. I

il. In the construction defined in claimfl,

I the plate magazine being adapted for holding'the plates piled therein, whereby they are held-in close succession by gravity, the means for operating the carrier being adapted for giving it step-by-step movement vrupward, and permitting downward movenient vin a single stepr at the end of a 'predetermined number of upward steps, the die member carrier being adapted for hold- 'ing the die member in direct-ly transverse re# lation to the direction of delivery of the plates from the magazine.

5. In the construction defined in claim l, the plate magazine being adapted for holdthe plates piled'therein forfdescending by gravity, the thrust bar being positioned fer encountering and ejecting from the pile thebottom plate qi the pile, the die member carrier being adapted for holding the die member in directly transverse relation to the direction of delivery of the plates from the magazine.

6. In the constructionl dened in claim 1, foregoing, the die member carrier being arranged with respect to its actuating means for making the step movement upwardly, and adapted to be returned by gravity to its starting position, a dash pot on the frame structure and a plunger piston carried by the die member carrier cooperatlng with thc dash pot in the descending movement of the carrier for damping said descending movement.

7 In the construction defined in claim l, the power shaft having an eccentricoperat- -ing connection with ,the thrust bar .for reciprocating the latter, and havingl also an eccentric operating connection with the pawl for giving step by step movement to the cam, said eccentric operating `connections bcng relatively positioned about the casting of said shaft for actuating t-he cam during the retraction of the thrust bar.

8. In a machine for the purpose indicated in combination with a frame structure, a carrier for a plate-receiving die member, a plate magazine, a.v t-hrust bar for ejecting plates from the magazine into the die member on said carrier, Operating means for the carrier for moving it transversely to the- -plate-receiving 'openings of the die member carrier thereimin steps corresponding to the spacing of said openings, and operating means for tl1ethrust bar for giving 1t its thrust movement in alteration with the step movements ot the carrier. v

9. In the construction delined in claim 8, a, power shaft mounted in the frame structure, a rotatable shaft parallel thereto, a. cam oli the latter shaft rotated thereb having circumferentiallysuccessive graduated cam steps of uniformly increasing eccentric- 'ity in the reverse of thev direction of rotation of theshaft, and. dropping o from the step of greatest eccentricity tofthat of least eccentricity; a ratchet wheel on said second shaft, a pawl cooperating with said ratchet wheel; crank and pitman connection from the power shaft to said pawl for giving the pawl a feeding stroke in each complete rotation of the power shaft, the graduated steps ot' the cam corresponding in angular extent to the angular interval between the ratchet teeth and between the pawl strokes; whereby the carrier is actuated one step for each complete rotation of .the power shaft.

l0. In a construction as defined in claim l, means for advancing the carrier, step by step, to position the die member for receiving a plate at each position reached by the successive steps, a disengageable clutch in the driving connection, means for locking able clutch in the driving connections; means for locking it at engaged position for driving, yielding means for disengaging it when released from the` locking means, and means carried by the rotating carrier operating shaft for releasing the locking means after a predetermined number of steps.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 9th day of April, 1926. i

ERIC CARLsoN.

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