US1441001A - Dental casting machine - Google Patents

Description

Jam. 2, 1923. f

E. KIMMG ET AL. DENTAL CAsrINc MACHINE.

FILED FEB. l5. 192|.

f TToRNEY.

Patented Jan. 2, 1923.

N UEMs STATESv EML KIMMIG, 01E JERSEY CITY HEIGHTS, NEWJERSEY, AND SAMUEL SILVER, OF

Y BROOKLYN, NEW YORK.

DENTAL CASTING MACHINE;

Application inea February 15, 1921. serial no. 445,087'.

To alla!) 7mm t 'may concer/m:

'Beit known'that we, EMIL KIMMIGand SAMUEL SILVER, res ectively citizens ofthe United States and -freat Britaim and residents of Jersey City Heights and Brooklyn, in the counties of Hudson and `Kings and States of New Jersey and Neworka have invented certain new and Iuseful Improvements in entalCasting Machines, of which the following is a specification.

`This invention i lrela'tes essentially to a," portable machinel for castingy dental metal members such as teeth fillings, crowns, plates and similar'V small articles of different designs depending on the mold used for the purpose.

An object of the invention is to provide a `pump controlled bythe operator for compressing the atmospheric air in the pump cylinder so thatit will flow into a ask after it is `sealed by they cylinder and adapted to contain the molden casting, f

Another object of' the invention is to provide means for swinging the pump cylinder out of the way-when it desired to bring a blow pipe into action to melt the meta-l.

Another object ol the invention is to provide the blow pipe with means for horizontallyoscillating it in order to turn on or shut ofi the combustible and at the same time place the pipe in or out of action.

Another object of the invention is to provide means for vertically adjusting the pump cylinder to or from the top or the flask to set it in alignment with different dimensional flasks. j

rEhe novel combinations of the invention are more fully described in the following specification and claims and illustrated in the accompanyingdrawing in which:

Fig. 1 represents a sectional side elevation of a machine embodying this invention.

Fig. 2 isa rear view of the lower part of the machine.

Fig. 8 is a vertical section taken` at right angles to Fig. 1 showing the pump cylinder swung over and the blov,T pipe in action.

Fig. 4t is a plan view of Fig. 3, some of the parts being broken away.

Fig. 5 is a vertical section on a larger scale of the-valve connection.

ln the drawing the numeral 6 designates a base having an annular recess 7 made to lit a flask S suitable tor holdingl a mold carrying the metal to be cast. s shown the flask is cylindrical and it has an open top to give access tothe interior of the flask when uncovered.

' The means forat times sealing or covering the top consists in general of a pump for compressing air, andl it includes a cylin` der 9 having a piston 10 slidingly mounted therein.- A stem 11 extends up through a hole in a screw cover 12 closing the top of the cylinder, and the stem has a handle 14 .surmounting the top whereby the piston is manipulated. The bottom of the cylinder is equipped with a diaphragm 15 provided with a seriesof lsmall holes 16 to permit the flow of the compressed airin the cylinder into the flask. An annular member 17 forming an integral part of or brazed to the cylinder hasa countersunk bottom 18 to seat a packing 19 of heat resisting substance such as asbestos, for engagement with the top of the flask. lhen the cylinder covers the top of the flask as indicated in Fig. 17 the packing prevents anyle'akage of air from the flask. j

Projecting rearwardly from the annular member is a lug QO-pivoted Vat 21 to a bifurcated slotted member 22 extending downwardly. grooved standard 23 best seen in Fig. Q forminga contiguous extension at the rear of the base Acoacts with the flat stem of' the slotted member to guide it up or down and a thumb bolt 24 holds the parts in locked position. lVhen the thumb bolt is loosened the slotted member 22 can be slid in the groove to move the cylinder up or down within the limits of' the slot so as to bring it in line with the top of' the flask thus accommodating flasks of different heights and dimensions. A handle 13 fixed to the front of the cylinder opposite the lug serves as a grip to actuate the cylinder.

A blow pipe for melting the metal in the mold comprehends a post 25 secured to an extension located at the right hand side of the base as indicated in Fig. 3. The post has a. bifurcated top 26 with tapped holes for the insertion of a pivot or bolt 2T made to pass through an eye formed in the stem 28 of a valve 29 so as to iix it to the post. A casing` 80 having a nozzle 31 is supported on the valve. Inlet pipes 32 and 38 carried by the casing respectively supply air and a fuel such as illuminating gas to flameat the noz- Zle and be projected into the flask to heat the metal placed in a mold as is well known.

As shown the nozzle is pointed towards the ask while 'in action, but when it is desired to shut off the fuel the nozzle is given a one-quarter turn about the valve as indicated inldotted lines in Fig. 4. `When the nozzle is in action the cylinder is swung over with its axis at right angles to the flask.`

The machine is portable consequently it can be conveniently carried and by having the pump arranged on the base in close relation with the flask, the use of la separate compressed rair tank is eliminated. The operation of the machine is as follows: The mold with the metal is placed .in the flask after the scylindueris swung over to open the flask fas indicated in Fig. 8, the flame from thepblow pipe then melts the metal-and the pipe is turned out ot the way. The cylinder is then swungfback to engage the upper portion of the lflask, the `piston in the mean timeyhas been pulled upward expelling the air above it-and admitting `air through the apertures in thev'bottom to lill the space below the piston. The piston is -then pushed downward compressing` -the -air below the piston -'which Iiows A `through the apertures intoftheflask. V.The molden metal will be forced into `:all` the cavities prepared for it in the mold bythe .air pressure `thus preventi-ng any flaws `forming in Ithe metal after it cools. y p

.It will be readily understood that the `machine can be used to ycast anysmall. metal article, and the air in the flask is driven 1out bythe force ot' lthe compresedairtabove it through channels 34: in the base so 'that the actuation ofthe pump creates a continuous circulationto insure rapid cooling andl a casting free from pores. a lvlodilications of the invention can be made within lthe law of equivalents and scope ofi-the claims for eX- ample, the extension carrying the post 25 could be removable and fixed to. the opposite side ot thebase in order to accommodate a left handed operato-r.

l. A casting machine comprising a base having a standard, an open flask removably mountedon' the base, a pump cylinder oprovided with a lug, the lower end of the cylinder being normally in engagement with the upper open portion of the laSlr, a vdevicefor swingingly andmovably connecting the lug tojthe standard-to VAraise or lower 'the cyli-nder, and means for lockingthe movable device ,to .the standard.

V2, A; casting machine comprising' a 'base havingl a standard, Van Vopen 'flask` removably mounted onthe base, a'pumfp eylindergprevided with a lug, the lower par-t of fthe cylinder being normally adapted to engage the upper open portion of the ask,.a depending memberhinjged to the lug, means for slidingly connecting .the member to-thestand ard to raise or lower. the cylinder, .and means tor locking` the member tothe standard.

8. A casting machine comprising base having a grooved standard, an open rflask removably mounted on the base, a pum-p cylinder provided w-ith a rearwardly projectingrlug, thelower endof the cylinder being normally adapted to engage the upper open portion of the ,laskfa slotteddepe'nd ing member "hinged to :the lug 'and' vertically slidable inthe grooveto 'raise or vlower the cylinder, and a bolt coacting withthe slot for locking the member Ato the standard.

Signed at N ew York in the county of N ew York land :State (iiNew York AthisV 5th .d ay ot' lE/brnary A. l). Ai921.

EMIL KIMMlG-,-

SAMUEL .S-ILVLER.

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