US1105838A - Tablet-machine - Google Patents

Description

E. L. RICHARDS.

TABLET MACHINE.

APPLICATION FILED novfla, 1913.

Patented Aug. 4, 1914.

4 HHEETS-BHEET 1.

-WITNESSES M71 M i ATTORNEY UE NORRIS PETERS CU" FHOTO-LITHQ. WASHINGTON. D C

E. L. RICHARDS. TABLET MACHINE.

APPLICATION TILED NOV. 13, 1913.

1,105,838. P n ed Aug. 4, 1914 4 SHEETS8HBET 2.

THH

WITNESSES A TTORNEY HE NORRIS PETERS CO. PHOTO-LITHOH WASHINGTON. l1,

244w BY mil. %w 0 4 B. L. RICHARDS.

TABLET MACHINE.

APPLICATION FILED NOV.13, 1913.

1,105,838. Pa ented Aug. 4, 1914.

4 SHEETS-SHEET 3.

V mmnnmmu? ATTORNEY E. L. RICHARDS.

TABLET MACHINE. APPLIOATIOH FILED NOV. 1a, 1013.

1,105,838. Patented Aug. 4, 1914.

4 SHEBTSSHEBT 4.

INVENTOR WITNESSES gn M1 M12:

A TTORNEY E1 lint" AES PATENT FFIC:

TABLET-MACHINE.

T 0 all whom it may concern Be it known that I, .EMANUEL L. ltrcrr ARDS, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and Iuseful Improvements in Tablet-Machines, of which the following; is a specification.

My inventionhas relation to certain improvements in a machine for compressing granular or powdered materials into different size tablets and freeing loose matter from the formed tablets during their delivery, for which U. S. Letters Patent No. 686,7 were granted under date of November 19th, 1901; and my present invention particularly relates in such type of machine, first, to mechanism to actuate upper tablet forming plunger-dies in a downward direction by apositive drawing motion into the path of cooperating positively actuated lower plunger-dies operating in an upward direction to complete and in a cleanly manner deliver the tablets and at the-same time that they are beingdischarged to freeloosc matter separated from the formed tablets during their discharge; second, to provide an adjustable rack and pinion means to adjust the stroke in the movements of one set of said plungendies so as thereby to vary quickly and effectively the size or thickness of the tablets to be produced; and third,to certain other details in constructive arrangement of the machine as to further improve its working as well as the character of the product obtained, as hereinafter more fully explained and pointed out in the claims.

My inventib'nstated in general terms, consisting of a tablet machine, will be more fully understoodfrom the followingdescription taken in connection with the accompanying drawings forming part hereof, in which Figure 1, is a front elevation of a machine with the upper plunger head shown in central section and with the divided receiving receptacle for loose matter and formed tablets, removed; the said machine as so illustrated and explained, embodying essential main features of my present invention. Fig. 2, is a side elevational view looking from the left in Fig. 1, showing certain parts thereof,

in section and also showing the supported divided receptacle for loose matter and compressed tablets. Fig. 3, is a vertical central section on the line 00, w, of Fig. 1, showing,

Specification of Letters Patent.

Application filed November 13, 1913.

Patented Au. 4,1914.

Serial No. 800,719.

more in detail, the power driven mechanisms to respectively, operate the upper plungerdies downward by a positive drawing motion into the path of cooperating positively actuated lower plunger-dies in an upward direction and controlled by an adjustable rack and pinion means of the mechanism actuating said lower plunger-dies. Fig. 4, isa plan view, partly in section, showing general and particular detail arrangements of parts of the said machine. Fig. 5, is a sectional elevation of the maindrive shaft on the line 1 y, of Fig. 1, showing the operating cam for controlling the movement of the lower plungcndies, the operated reciprocatingfeed-slide and the eccentric means for controlling the positive action of the upper plungel dies in cooperation with the lower of said plunger-dies; and Fig. 6, is an elewhen in broken section of the feed-slide in an operatlve position and the upper and lower plunger-dies in respectively, the positions occupied by them during feeding of matter to the perforated die-block of the machine. 1

Referring to the drawings, a, is a standard having. bolted thereto a slitted discharge chute a, located above a divided trough or receptacle a supported from a bracket a", projectingfrom the standard a, and which receptacle by means of an adjusting screw bolt (14, holds the same in whatever required adjusted position desired, below the slitted discharge chute a 7), is a feedihoppen for powdered or gran ular material having a flexible tube 6 connected therewithand with a feed-slide b which latter is mounted in a guide a secured to the top of the standard a, as clearly shown inFiig. 2. This slide is connected with a link I), and the latter with a link 6 and it in turn with a lever-arm b loosely mounted on a rotary shaft 6. Aclamp b, is keyed to the said shaft above the leverarm 21*. This clamp is provided at one end.

with adjusting bolts 6 and b", bearing against said lever-arm as clearly shown in Figs. 1 and i, to thereby permit of change in position of the said lever-arm and as well as variably alter the position of said feed-slide b, for complete discharges of both formed tablets and loose matter from the feed-slide guide-way a, of the machine through the chute a, into the partitioned adjustably supported trough a of the machine. The rotary shaft b, is operatedby a rocking-arm b carrying a roller Z2 actuated by a cam Z2 mounted on the main drive shaft 0. The roller I), is held against the working face of the said cam 6 by a rod b, mounted in a bearing Z). The rod Z2 carries a coiled spring 5 and a nut b with which bearing and nut, the respective extremities of the spring 6 are in contact.

o", is a locking-lever pivoted to the standard a, andprovided with tightening nut 5 This lever is provided for locking the slide 6 in its forward position, when the machine is at rest, so that thereby extraneous matter may be excluded from the perforated dieblock 6, at such time.

The main shaft 0, 1s provided at one extremity with a gear 0 meshing with a pinion 0 on a shaft 0 of the standard-a, as

teeth of a pinione carried at the lower end' clearly shown in Figs. 1, 3 and 4. The shaft 0 has secured thereto fixed and loose pulleys c and Gland on one of them as shown is a belt a, and a belt-shifting device 0 connected therewith. This device 0 extends from a bracket a secured to the standard (11. j

The said belt-shifting device 0 comprises a hand-hold 0 with a rod 0 carrying at its rear end a crank 0 having a pm 0 operating in a slot 0 of a movable blockc secured to the rods 0 and 0 vone of these rods carries at its outer end a rod 0 having a loop a, through which the belt travels. By turning the hand-hold 0 the rod 0 is revolved to cause the pin 0, to move to the right as in Fig; 4, and thus to shift the block 0 and parts connected therewith, whereby the belt can be readily shifted from the fast pulleyo to the loose pulley 0 or vice versa. On the said main. shaft 0,, centrally thereof, is secured an eccentric (Z, carrying a pillow block al the arm 6?, of which is pivoted at, d to a longitudinal rocking arm (Z journaled in the rear lower portion of the standard a, as clearly shown in Fig. 3. On the pivot (Z is secured links (Z and d", the upper end of which are pivoted to vertical plunger rods 0Z and 03 held in bearings a and a of the standard a, as clearly shown in Fig. 1. On the upper ends of the said rods al and (Z is mounted the upper head d", for a series of plunger-dies d The main shaft 0, has secured thereto outside of the standard a, thecam 6 operating by a roller 6 carried by one end of a bell crank-lever c journaled at e,-to a bracket 6 projecting from the standard a, and the opposite end of the said bell crank-lever 6 is provided with gear-teeth e, meshinghwith of a rod a This rod at the opposite end is in pivotal connection with a cross rocking arm 6 journaled to a floating pivot 6 supported by, links 6 to a shaft 6 This shaft is journaled to a bracket 6 in the. upper part of the standard a. The opposite end of the rocking arm 6'", is in pivotal conparts of the machine, it being only necessary to stop the machine long enough to effect the required change of adjustment of the rack e, and pinion e Directly below the lower plunger-head e, is provided an adjustable bufier 6 to relieve shock or strain on the working parts that actuate the respective plunger-dies,fto which subject, in the ordinary operation of the machine. I

The mode of operation of the machine as hereinbefore described will now be exj plained. The first step in the operation is to feed the pulverized or granular material through the hopper b, to the slide '5 to deposit a definite quantity of the material into result thecam Z), on the main driven shaft 0, is started by the shifting of the belt 0 onto thefast pulley c, to set in action the said shaft 0. By the operation of the cam 6 the roller 6, ridingon the face of the feed block 6 to shift it back and forth in its guide a over the plunger die-block b, and to thereby deposit-a certain. definite quantity of material thereinto for being subsequently acted upon ,byboth sets of plunger-dies d and 6 in cooperating to compress the said material so deposited into the particular size or thickness of tablet required. Thefront edge of the said slide. 6?, serves in its forward shifting action in the guide a to free the formed tablets as well as loose matter in the tableting separated from each other from the machine, the formed tablets being deposited along the slitted chute a dropping into. the divided receptacle or trough a and away from the deposited loose the perforated die-blockc, and to effect such matter deposited through the slits of said chute into anotherdivision of the same.

In order to control the required thickness or size of tablet to be formed,'the.rack c, and pinion 6 must be adjusted to the required degree j and this accomplished by simply looseningthe lock-bolt e, and .by

means of the hand-wheel e 5, jshifting the pinion along the rack 6 to either lengthen or shorten the stroke movements of the lower plunger-head e Thebuifer e may be adjusted either up or down to compensate for such change in the stroke of the said plunger-head .5 and by such adjustment relieving undue shock or strain on the lever arms 6 and e", and cross-head or rock ing arm 6. Motion is imparted to these several members by the roller e operating against the working face of the cam e on the main shaft 0, of the machine.

The upper plunger head 03, is operated in an up and down direction by a direct action through the connecting rods d and (Z and links d and (Z pivotally connected with the shaft 01, carried by the arm (Z ,of the pillow block al eccentrically mounted on said main shaft 0, whereby through the pushing action of the said eccentric d, on its block d, the positive and powerful direct action thereby of the upper plunger-dies onto the material to be acted upon, thereby effects a far better product and a much more cleanly and symmetrical type of tablet. The pivotally supported longitudinal lever arm (i movably supported on the shaft d, serves to maintain the links 01 and (Z and the rods cl and d always in true vertical aliningposition for action. Through the said coiiperative positive action of both sets of plunger-dies, in unison, after the fed material by means of the slide block 6 has delivered its requlred quota of such material onto and into the perforated die-blook c, it will be quickly and efficiently then compressed by the said dies into the required size or thickness of tablet.

The machine, it should be borne in mind, will be so timed as that successive movements of the feed slide 6 and plunger-dies (Z and 6 will successively o erate to accomplish the above defined ob ects and after the plunger-dies free themselves from formed tablets, the slide block 6 will free the tablets aided by the lower series of plun-a ger-dies 6 as well as free all loose matter accumulating from the formed tablets into the divided adjustable trough a for then pursuing similar operations of the machine, as hereinbefore described.

Having thus described. the nature and objects of my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a machine of the character described, two sets of cooperating plunger-dies, a main shaft carrying a mechanism connected positively with one set of said dies and actuated in a downward direction by a positive draw motion, a cam mounted on said shaft andoperated thereby, sald cam actuatlng lntermeintermediate mechanism, a guideway and,

feed-slide therefor, said slide connected by pivoted links with a lever-arm loosely mounted on said rotary shaft, a clamp keyed to said rotary shaft and provided with adjusting bolts bearing against said lever-arm to change the position of said arm and there by to variably alter the position of said feedslide for complete discharges of both formed tablets as well as loose matter from said guide-way, substantially as and for the'purpose described.

2. In a machine of the character described, two sets of cooperating plunger-dies, a main shaft carrying a mechanism connected positively with one set of said dies and actuated in a downward direction by a positive draw motion, a cam also carried on said shaft and operated therebyl and said cam actuating intermediate mec anism having a rack and pinion connected adjustably with the other set of said dies, said rack and pinion adapted to permit of quick change of movement of said dies, and another cam mounted on said shaft, arotary shaft actuated by said cam through intermediate mechanism, a guideway and feed-slide therefor, said slide connected by pivoted links with a lever-arm loosely mounted on said rotary shaft, a clamp keyed to said rotary shaft and provided with adjusting bolts bearing against said leverarm to change the position of said arm and thereby to variably alter the position of said feed-slide for complete discharges of both formed tablets as well as loose matter from said guide-way, and a pivoted locking de vice adjustably support-ed and provided with tightening means, whereby said feed-slide is adapted to be locked in one position thereof, to exclude extraneous matterfrom the die-block of the machine, substantially as described.

In witness whereof, I have hereunto set my signature in the presence of the two subscribing witnesses.

EMANUEL L. RICHARDS.

WVitnesses:

THOMAS M. SMITH, I'IELEN S; Hour.

Copies of thin patentmey be obtained for he cents eaoh,by nddx-enin: the Commissioner at Patents, Washington, D. G.

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