US2488176A - Piston-expanding machine - Google Patents

Description

Nov. 15, 1949 Filed Aug. '23, 1946 A. J. DAVIS PISTON-EXPANDING MACHINE 2 Sheets-Sheet l Ina/1210! A82 0 Jfiaw's,

"-4 5's H /$7 M l 4 Attorneys Filed Aug. 23, 1946 A. J. DAVIS PISTON-EXPANDING MACHINE 2 Sheets-Sheet 2 E I E [in Inventor Alia J flaws /4 %7%MM,,6WWQMW Attomzqys Patented Nov. 15, 1949 UNITED STATES PATENT OFF 1 CE PISTON EXPANDING MACHINE Alto J. Davis, Montgomery, Ala. Application August 2-3, 19%; Serial No. 692,670

This invention relates to piston expanding machines or furnaces operated by gas or the like burners and adapted to expand the piston when con-fined therein by the application of heat to the same.

It is the object of the invention to provide a piston-treating furnace which is provided with a simple means-for vertically adjusting the supporting member for the piston relative to the heating flame, whereby to impart or adjust the flame relative to its: point of application to the piston being treated.

It is another object of the invention to provide an adjustable piston-supporting frame for such furnaces which can be simply adjusted by turning a screw which is located exteriorly of the furnace, and whereby the adjustment may be made while the furnace is still in operation and without necessity of cutting off the gas flame.

It is another object of the invention to provide with a. piston-treating furnace a supporting structure for the piston holder which is particularly" adapted to contain the holder while retaining the piston, or to retain the. holder alone without the piston.

According to the invention the furnace includes a shell with an opening therein through which the piston to be treated can be inserted. This casin has a bottom on which there is provided a pair of hollow studs adapted to receive the downwardly extending pins. in telescopic fashion on a supporting table on which the piston is rested. The supporting table is hollow and is engaged-- at its under portion with a forkshapecl member which is pivoted within the furnace at a. point slightly removed from the supporting frame and extends exteriorly of the furnace to a. point where it can be adjusted by a hand screw carried on a bracket on the furnace wall. By this construction the piston can be raised and lowered relative to a burner extending upwardly through the bottom of the furnace. While the present structure discloses a gas burner; it will be understood. that the heatin can be effected by an electric heater if so desired.

Below the front Opening there is connected a rearwardly extending shaft or hollow sleeve having a notch at its outer end and a camming hand-operated member thereon adjacent the notch and adapted to enter the same to make secure a piston holder adapted to lie Within the notch. Intermediate the length of the sleeve and slightly removed from the front of the furnace, there is connected for vertical adjustment in the sleeve a rod which is bifurcated at its upper end 2 Claims. (CL. 263'e-5.)

2 and adapted to receive the holder in placing the same thereover when not in use- For other objects: and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying: drawings, in which:

Figure l is a longitudinal cross-sectional view showing the interior of the furnace and the parts for'effecting the vertical ach'nstmem of the piston supporting' table.

Figure 2: is transverse cross-sectional view taken along the line 2-20]? Figure 1,. and look.- ing downwardly and. in the direction. of the arrows thereof.

Figure 3 is. a side ele atirmalview with por tions broken away to. show the interior parts of the. furnace and to. show the. manner in which the; piston-holder bracket can be connected to the furnace. on. the front thereof.

Figure. a is. a detail: fragmentary and cross-sectional view of the sleeve at. its notched end and illustrating. the two positions of the retaining cam associated therewith.

Figure 5- is a. detail view, in crossesection, through the supporting sleeve on the exterior of the. furnace; and illustrating the manner in which the supporting rod maybe clamped in any one of its vertically adjusted positions. tothe sleeve.

Figure 6. is a perspective view of the entire arrangement looking upon one side. and into the front thereof and showing particularly the. arrangement of the supporting sleeve: and the parts thereof.

Referring now to: the; figures; II]: represents a furnace casing having a bottomv II vertically spaced. from the bottom edge of the casing. The bottom, edge of the casing issupported upon leg members l2 held. against lateral. separation. at. the bottom. by a cross structure- I3, Figure 6. The legs I2 may have feet I4; thereon adapted, to; be connected: to the floor on which the apparatus is: supported and so; 851170 permit its lateral; creeping along the floor surface;

In the bottom II is a central opening I5 up through which extends a gas burner I6 adapted to deliver a heat-treating flame to the center of the piston. The burner I6 is supplied by gas fittings I1, and its operation is controlled by a pull-rod I8 connected at its front end to a valve I9 and which extends to the front of the burner where it will be accessible to the operator.

The opening I5 is closed by a plate 2| secured to the bottom face of the bottom I I by clamping bolts 22. On the top of the bottom there e adjusted from the exterior of the furnace and without cutting down the burner flame at the time. This structure comprises a horizontallydisposed lever 27 operatively connected to the table or plate 25 and actuable from without the casing ID for causing vertical adjustment of the table relative to the burner I6. 21 is bifurcated, as at 28, and is mounted for pivotal movement about a horizontal axis or pivoted at 29 to a vertically extending stud post 3| on the bottom II. The bifurcated ends are pivoted, as indicated at 32, to the under surface of the ring 25. By having the bifurcated portion 28, the lever 21 will not be in the way of the flames issuing from the burner IS. The lever 27 extends through the casing ill to the exterior thereof. On the outer surface of the casing there is provided a bracket 33 having at its outer end an adjusting screw 34 adapted to engage the outer end of the lever to effect the adjustment thereof. A guard member 35 on the bracket 33 keeps the end of the lever in registration with the lower end of the screw 34. Referring now to Figures 3 to 6, on the front of the casing there is connected a flanged sleeve bracket 36 which has threaded into it a pipe 31 having a notch 38 in its outer end and a cam locking member 39 pivoted thereon to cooperate with the notch 38 to retain a piston holder 40 in a fixed position. This piston holder 40 carries a piston 4| in such fashion as its interior can be easily examined. The holder 40 comprises a ring formation 42 and clamping elements 43 extending through the sides thereof for engagement with the side of the piston 4|. When the piston is removed from the furnace, it can be clamped to the holder 40. The clamping element 39 is pivoted at 34 and has a serrated cam portion 45 adapted to bear against the portion of the holder which enters the slot 38.

When the holder 40 is not in use, it may be temporarily supported on a further supporting arrangement on the sleeve 35. This other arrangement is shown particularly in Figure 5, and comprises a vertically adjustable rod 46 having a bifurcated top end 41 on which the piston holder can be hung. The rod 46 is retained in position by a clamping screw 48 having an operating handle 49 and extending through a second portion 50.

While various changes may be made in the detailed construction, it shall be understood that these changes shall be within the spirit and scope The lever 4 of the present invention as defined by the appended claims.

I claim:

1. A piston treating apparatus comprising a vertically-disposed furnace casing having a bottom provided with an aperture extending therethrough, a plurality of supporting sleeves arranged in spaced relation projecting upwardly from said bottom and carried by the latter, a piston-supporting table mounted in superimposed relation on said bottom, said table having a plurality of pins arranged in spaced relation and projecting from its under-face thereof, the pins being in bearing engagement with the sleeves ,ofsaid bottom, there being an aperture extending through said table, the aperture in the table being positioned in alignment with the aperture in said bottom, a burner extending through the bottom aperture and having its tip located beneath said table, and a horizontally-disposed lever operatively connected to said table and actuable from without said casing for causing vertical adjustment of the table relative to said burner.

2. A piston treating apparatus comprising a vertically-disposed furnace casing having a bottom provided with an aperture extending therethrough, a plurality of supporting sleeves arranged in spaced relation projecting upwardly from said bottom and carried by the latter, a piston-supporting table mounted in superimposed relation on said bottom, said table having a plurality of pins arranged in spaced relation and projecting from its under-face thereof, the pins being in bearing engagement with the sleeves of said bottom, there being an aperture extending through said table, the aperture in the table being positioned in alignment with the aperture in said bottom, a burner extending through the bottom aperture and having its tip located beneath said table, a horizontally-disposed lever mounted for pivotal movement about a horizontal axis having one end secured to said table and having its other end extending exteriorly of said casing, and means on the other end of said lever for effecting pivotal movement of the latter to thereby cause vertical adjustment of the table relative to said burner.

ALTO J. DAVIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 854,974 Wiecke May 28, 1907 2,017,423 Walker Oct. 15, 1935 2,025,707 Consolazio Dec. 31, 1935 2,379,627 Davis July 3, 1945 FOREIGN PATENTS Number Country Date 1,582 Netherlands Oct. 2, 1916 330,844 Great Britain June 19, 1930

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