US1924221A - Casting machine - Google Patents

Description

Aug. 29, 1933. A. vYN 1,924,221

CASTING MACHINE Filed May 10, 1932 2 Sheets-Sheet l Elma/rm 3/ Jr erzd V572 (M mi/war,

Aug. 29, 1933. A. VYN 1,924,221

CASTING MACHINE Filed May 10, 1932 2 Sheets-Sheet 2 WIIIIIIIIFIIIIII Q- um 26 l 76 i /Z 14 4 w Patented Aug. 29, 1933 l s I 1,924,221 7 'CASTING mo 's Arend Vyn, Grand llavem Mich. Application May 10, 1932. Serial No. 610,515

2 Claims. (oi. 22-73)" I I v This invention aims to provide a simple but effective means, whereby, through the instrumentality of water flowing through a faucet, suction may be created to facilitate casting operations, such as are resorted to in the art of dentistry. The invention aims, further, to providenovel means for controlling the flow of the water whereby the suction is brought about. i

It is within the province ofthe disclosure to improve generally and to enhance the utility of devices of that type to which the inventionappertains.

With the above and other objects in view, which will appear as the description proceeds, the .invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within thescope of what is claimed,- without departing from the spirit of the invention.

In'the accompanying drawings: Fig. 1 shows in vertical longitudinal section,

a device constructed in accordance with the invention, parts being broken away, and parts being in section;

Fig. 2 is atop plan wherein parts are broken away;

Fig. 3 is a transverse section wherein parts are in elevation, portions being broken away;

Fig. 4 is a vertical transverse section taken through the valves which control the suction;

Fig. 5 is a horizontal section taken through the lower part of that portion of the device which appears in Fig. 4.

In the drawings, there is shown a fluid-pressure valve under the control of an operator, such as a water faucet, including a body 1 having a downwardly extended spout 2, a tubular extension 3 being connected to the spout by a pin and bayonet slot lock 4, or in any other suitable way. The primary function of the extension 3 is to prevent splashing, if water is used as the actuating fluid. The employment of compressed air to create suction is within .the contemplation and spirit of the invention. The body 1 of the faucet has lateral projections 5, supplied with downwardly tapered bores 6. The lateral projections 5 of the body 1 are provided with side passages 7 communicating at their outer ends with the bores 6, and communicating at their inner ends with a circular transverse chamber 8 that is formed in the body 1.

The bore of the body 1 is contracted, adjacent to the spout 2, as shown at 9, to form a reduced throat'lo, and from this throat 10, a flared bore 14 extends. backwardly tothe chamber 8. Within the body 1 is formed a tapered nozzle 11 which projects across the chamber 8, and through the rearwardly'fiared bore 14 to the reduced throat 10, as Fig. 5 will show.v The conduit 12 of the nozzle ll is forwardly tapered. H i

' The rear end of the tapered conduit 12 of the nozzle 11 communicates, with a valve chamber 15 in the body 1. At the lower end of the chamber 15, a valve seat 16 is formed in the body .-1.- The passage through which water enters the faucet .is marked by thenumeral 17 and is prolonged downwardly, as shown at 1 8, and upwardly through the valve seat 16, so as to communicate with the chamber 15. A valve 19 closes downwardly, on the seat 16 and is carried by a stem 20 having a handle 21. of any desired construction, the valve stem being threaded at 22 into the body 1, for quick movement. The stem 20 passes through the usual gland 23 on the body 1. Many of the parts referred to are portions of a common and wellknown faucet construction, and it is to be understood that the novel portions of the de-- vice are to be used in connection with any kind of a faucet adapted for the end in view.

Tapered suction controlling valves 24 are mounted to turn in the tapered bores 6 of the projections 5 and are held therein byscrews 25 at they lower ends of the valves. These screws 25 also close the lower ends of longitudinal bores 26 in the valves 24, the bores 26 terminating at their upper ends within the valves, as Fig. 4 will show. The valves 24 have side ports 27, communicating with grooves 28 which extend circumferentially of the valves, on their outer surfaces,

a little less than, or about half way around the.

length, are. mounted in the upper ends of the I valves 24, and project laterally'therefrom, the

arms 29 being in communication with the longitudinal bores 26 'of' the valves. On the outer ends of thearms 29 are mounted the stems 30 of horizontal supports 31, the supports having u'p-' standing rims 32. The stems 30 of the supports 31 are provided with vertical passages 33, comarms 29. On the 'upper'surfaces of'the supports ,7 31, there are concentric annual grooves 34, con-- nected with each other by radial grooves 35, the r innermost of the circumferential grooves '34 municating at their lower ends with the tubular being connected in the same manner with the upper end of the passage 33.

In practical operation, the arms 29 may be disposed at right angles to the length of the faucet body 1, although the position assumed by the arms depends on'the length of the groove 28,

'due regard being had to the convenience of the operator. This brings the circumferential grooves 28 of the valves 24 in communication with the passages 7 in the'body of the faucet.

When the water valve 19 is open, the water flows through the. passage 17 and the part 18 thereof, into the chamber 15, and out of the chamber 15 through the conduit 12 of. the nozzle 11, into the spout 2 and out of the extension 3 of the spout. v

The water, as it leaves the conduit 12 of the nozzle 11, creates suction in the chamber 8, and

this suction is communicated by way -of the passages 7, the ports 27, the bores 26, the tubular arms 29, and the passages 33, to. the grooves 34 1 'onlthe supports 31.

34 is communicated to the casting rings (not.

The suction in'the grooves shown) that are mounted on the supports 31.

In the making of castings of the sort used by dentists, a wax model is made of the thing which is to be cast. This model ismountecl on a crucible former, by means of a 'WlIB leading. from the wax model to the crucible former. A ring is placed on the crucible former and filled with an investment material, comprising plaster of paris as'a base.

heated until the wax model is entirely eliminated by being melted or burned out. The ring isth'en placed on the support 31.

the. water is turned on in the faucet, a vacuum is created which draws the air through the investment material and carries the gold down into the mold, thus producing a duplicate of the After the investment material has set, the crucible former and the wire sprue con necting the crucible former and the wax model "are removed.

The casting ring is then placed on the fire and- The gold or other metal is put into the crucible and melted. Whenoriginalwax model. The foregoing explanation relates to the casting operation, considered as such, and need not be illustrated in the drawings.

The supports 31 are of different diameters, in order to accommodate casting rings of vdifferent sizes.

When the occasion for the use of the device has passed, the arms 29 may be swung back more or less, toward parallelism with the body 1. Thisoperation rotates the suction controlling valves 7 duit,'means for controlling the flow of'liquid through the liquid conduit, a valve journaled in the faucet and interposed in the suction conduit, the valve having a substantially rigid lateral handle, and a mold carrier mounted onthe handle, the mold carrier having an orifice whereby suction may be applied to a mold on the carrier, the suction conduit being continued through the handle, to the orifice of the moldcarrier, the valve controlling the suction conduit when the valve is operated by means on the handle.

' *2. A casting machine constructed as set forth in claim 1, and further characterized by the fact,

'that'the valve turns about a substantially vertical axis, the handlebeing disposed substantially at right angles to said axis, and horizontally, and the mold carrier being'disposed-in'a substantially horizontal position, so that the mold may remain in place on the mold carrier whilst the handle is being operated to open or to close the valve.

AREND WN.

Images