US1531407A - Charging machine for annealing furnaces - Google Patents

Description

March 31. 1925. 1,531,407

L. JOHNSON CHARGING MACHINE FOR ANNEALING FURNACES Filed Aug. 12- 1924 3 Sheets-Sheet 1 3 1:11? 17- g 15- 1 J2 [3 mm H 21 IQIL I Marsh 31, 1925 1,531,407

L. JOHNSON CHARGING MACHINE FOR ANNEALING FURNACES le g 12- 1924 3 Sheets-Sheet 1s Patented .Mar. 31, 1925.

UNITED STATES Parana creme.

LANE JOHNSON, O F PITTSBURGH, PENNSYLVANIA, ASSIGNO'R TO UNITED ENGEIEER- IN G AND FOUNDRY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CHARGING MACHINE FOR ANNEALING FURNACES.

Application filed August 12, 1924. Serial No. 31,544.

To all whom it may concern:

Be it known that 1, LANE JOHNSON, a citi zen of the United States, residing at Pittsburgh, county ef Allegheny, ,and State of Pennsylvania, have invented a new and useful Improvement in Charging Machines for Annealing Furnaces, of which the following By the present invention I. havev provided an annealing furnace charging machine which is adapted to raise the annealing box from and lower it on to the supporting base portion of the furnace chamber without any appreciable longitudinal movement of the box, thereby avoiding any liability 'of knocking out the end Wall of the furnace chamber or of damaging the supporting base portlon of the chamber.

In the accompanying drawings,

Figure l is a p an view of a. preferred form of charging machine embodying my invention;

Figure 2 is a view showing the charging machinein side elevation and in operative position beneath an annealing box, the furnace chamber in which the annealing box'is placed being shown in section;

Figure 3 is a broken away view showing the charging machine in elevation and positioned in front of the furnace chamber;

Figure 4 is a plan view, on a larger scale, of a portion of the chargin machine;

Figure 5 is a section on the line V-V of Figure 4, but on a larger scale;

Figure 6 is a side elevation corresponding to Figure 4;

Figure 7 is a cross section of the lower portion of the furnace chamber, showing in dotted lines the annealing box being held in raised position off of the supporting base portion of the chamber by the charging machine, and i Figures 8 and 9 are respectively a plan view and aside elevation showing a slight modification of the means for raising and lowering the annealing box.

Inthe embodiment of the invention illustrated in Figures 1 to 7 inclusive, the charging machine comprises a supporting carriage 2 adapted to benioved into and out of a furnace chamber onrails 3, sa'id rails as shown being in the form of channels. The

carriage comprises 'two longitudinally extending. parallel members, each of which consists of. two parallel bars 4 having track engaging rollers 5 journaled therebetween on pins 6 extending through the bars. The outer bar 4 of each of said longitudinally extending members is provided along its.

lower ed c with a rack 7 engaged by pinion 8, where y the carriage is adapted to be moved nto and outof the furnace chamber, the pinions 8 being driven by any suitable means.

The longitudinal members of the carriage are connected towardsthe front there'ofby a transverse brace 9. Mounted on the carriage adjacent, its. rear end is an electric motor 10,'the base 11 of which/is secured to the longitudinally extending members. The motor drives a screw 12 which is journaled in bearings 13 mounted on the carriage. This screw engages a nut 14 carried by a cross head 15. Links 16 are pivoted at one end upon pins 17 projecting from the ends of the cross'head. Each link has its opposite end bifurcated and pivoted to a screw clevis 18.-

Held between each pair of bars 4 is a series of lower wedges 1'9 and cooperating with each series of lower wedges is a series of upper wedges 20. Each'se ies of upper Wedges is mounted on a rod 21, the wedges being held in s aced relation thereon by sleeves 22. Eac rod 21 has its rear end portion screw threaded for engagement with a clevis 18 and mounted on such screw threaded portion is a nut 23. The forward end of each rod is also screw threaded and has mounted thereon a nut 24. It will be seen that the nuts 23 and 24 serve to clamp the upper wedges against the spacer sleeves 22.

' Supported upon the upper edges of each pair of bars 4 is an inverted channel 25. The upper wedges 20 are T-shaped in cross section to fit in the space between the bars 4: and also in the space between the flanges of the channel members, whereby the latter are prevented from shifting laterally on the bars gas will ,be apparent by reference to Figure 5. n v

- Each channel member has a pair of bearings 26at its rear endwhich support a pivot pin 27. Links 28 are pivoted at' one and upon each, pin 27. These links extend for- .wardly and are pivoted at their forward ends gupon pins 29 projecting from the bars a When an annealing box is to be placed ina furnace chamber, the 1notor will be operated to move the cross head rearwardly, thereby effecting, the raising of the supporting channel members through the cooperation of the upper wedges 20 with the lower wedges 19." The annealing box Wlll then be placed on the supporting members 25, the charging machine of course being 1n front of the furnace chamber, as illustrated in Figure 3. The pinions 8 will thenbe rotatedto move the charging machine'and annealing box into the furnacechamber, as 11- lustrated in Figure 2. The'position of the annealing box with respect to the supporting base p0rtion30 of the furnace chamber when the-box is thus moved into the furnace chamber is illustrated in Figure 7 It will be seen that the box has been raised by the charging machine to a position in which it clears the base portion as the box is.

moved into the chamber. When the box is in proper position in the chamber, the motor 10 1s operated in a direction to move the cross head 15 forwardly and allowthe annealing box tode'scend and rest on the supporting base portion 30 of the furnace chamber. The channel members 25 assume the position shown in full lines in Figure 7 in which position they are slightly below the bottom of the annealing box, which is now resting on the base portion 30. The charging machine may now be withdrawn from the furnace chamber. When it is desired to remove the annealing box from the furnace chamber the charging machine will be moved into 'sition beneath the box, as illustrated in igure 2, and the motor 10 operatedin a direction to move the cross head 15 -rearwardly and effect the raising of the box off of the supportin base portion 30 of the furnace chamber. ring this raising movement of the box the links 28 preient the supporting members 25 from having any apprecia le longitudinal movement relative to the carirage. Therefore there is no tendency to drag the annealing box in contact with the supporting base 30 and cause consequent damage to the latter.

Since the supporting members 25 are held against longitudinal movement during the raising and lowering of theannealing box, there is-also no dangerof 'the'la'tter being pushed against thefe nd wall of'the furnace chamber. I

In Figures 8 and 9 I have shown a slight modification of the means for; raising and lowering the annealing box. In this modified form of the invention anti-friction rollers 31 are substituted for the lower wedges 19, these rollers being journaled upon pins 32 supported in the bars 4:. Po sitioned above each pair of bars 4 is a similar pair of bars 33 for supporting the annealing box. These bars 33 are connected by pins 34 which form the journals for antifriction rollers 35. v Mounted on the rods 21 are double wedges 36 which are reciprocated in the spaces between the bars 4. and 33 and cooperate with the rollers 31 and 35 r for raising and lowering the supporting 1 members 33.

While I. have shown and described cer tain preferred embodiments of my invention, it will be understood that the invention is not limited to these precise embodiments but that it may be otherwise embodied within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. A charging machine for furnaces, comprising a carriage adapted to be moved into and out of a furnace chamber and embodying longitudinally extending parallel members,.each of the said members comprising a pair of spaced bars having track-engaging rollers journaled therebetween, supporting members for a container mounted on said carriage members, means interposed between each carriage member and the overlyingv supporting member and movable relatively thereto for raising and lowering said supporting members, and means for substantially preventing longitudinal movement of said supporting members relatively to said carriage members during the raising and lowering of said supporting members, substantiall as described.

2. A c arging machine for furnaces, com prising a carriage adapted tobe moved into and out of a furnace chamber, supporting means for a container mounted on said carriage, means interposed between said carriage and supportmgmeans and movable,

3. A charging machine for furnaces, comprising'a carriage adapted to be moved into and out of a furnace chamber and embodying longitudinally extending parallel mem bers, a motor mounted on said carriage adjacent its rear end, supporting members for a container mounted on said carriage members at the forward end of said carriage, wedge means interposed between said carriage members and supporting members, means operatively connecting said wed means with said motor whereby to shift sald wedge means longitudinally of the carriage for effecting the raising and lowering of said supportin members, and link means connecting eac of said carri e members with the corresponding supporting member for substantial y preventing longitudinal movement of said supporting members relative to the carriage durin the raising and lowering thereof, substantially as described.

4. A charging machine for furnaces, comprising a carriage adapted to be moved into rollers journaled therebetween, support1ng members for a container mounted on said carriage members, wedge means interposed between said supporting members and car- I riage members and holding said supporting members from shifting laterally on said carriage members, a motor mounted on said carriage, means operatively connecting said motor-with said wedge means for shifting the latter to effect the raising and lowering of said supporting members, and means connected to said carriage members and supporting members for substantially preventing longitudinal movement of said supporting members during the raising and lowerthereof, substantially as described.

11 testimony whereof I have hereunto set' my hand. I

LANE J OHNSONa

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