US2254701A - Heat treating apparatus - Google Patents

Description

Sept. 2, 1941. L. YOUNG '2,254,701

HEAT TREATING APPARATUS ,lNvENToR l www y0u/va E) BY ATTORNEY Sept. 2, 1941. L w. YOUNG HEAT TREATING APPARATUS Filed My 1, 1940 3 Sheets-Sheet 2 ATTORNEY Sept. 2, 1941. L w. YOUNG HEAT TREATING APPARATUS Filed May l, 1940 3 Sheets-Sheet -3 ATTORNEY 'such as overall length, distance betwee Patented Sept. 2, 1941 HEAT HEATING APPARATUS Lloyd W. Young; Scotch Plains, N. J., assignor to The Linde Air Products Company. a corporation Application May 1,1940, Serial No. v332,680

.12 Claims. (Cl. 266-4) This invention relates to the heat treatment of elongated metal bodies having longitudinally spacedcylindrical and/or laterally extending surface portions, and, more particularly, to apparatus for heat treating and hardening in succession description and accompanying drawings, in

'- which:

the surfaces of a plurality of cams and bearings N upon a camshaft by the application of localized high temperature heat, such as that pr -ded by an Oxy-acetylene dame. A

Camshafts vary widely in physical ensions,

cams, distance between cams and bearings, cam and bearing widths, cam contours, and other dimensions. Consequently, apparatus forJ hardening cams and bearings on a camshaft, to be successful, must necessarily be so constructed that the least possible time will be required to align a cam or bearing being treated with the heating means, or to make adjustment for cam spacing and other variables.

'I'he objects of this invention are to provide apparatus for heat treating a plurality of spaced and/or laterally extending portions of a metal Fig. 1 is a front elevation of apparatus, constructed in accordancewith this invention, for hardening a plurality of cams and bearing areas u pOna camshaft. v

- Fig. 2 is a vertical end view of the apparatus' Fig. 3 is a vertical sectional view of the apparatus of Fig. 1, taken along line 3-3 of Fig. 1;

Fig. 4 is a partial vertical sectional view of the apparatus of Fig. l, taken along' line 4-4 of Fig. 1; Fig. 5 is a partial vertical sectional view taken along line 5 5 of Fig. 1 showing in clearer detail the heating means and an indexing device used in treating cams;

Fig. 6 is a partial vertical-sectional view taken along line 6-6 of Fig. l, showing in clearer debody; to provide apparatus for hardening a cam or a pluralityV of cams on a camshaft in which each cam is hardened individually, but in which the results of hardening each cam are uniformly duplicated in the case of all the cams; to provide such apparatus by which the bearings as well as the cams on a camshaft can be hardened without shifting the camshaft 'or making unnecessary adjustments to the apparatus; to lprovide such apparatus which is easily adjustable so as to kpermit treatment of camshafts of varying lengths, and cams and bearings of differ-A end widths; to provide'such apparatus in which a relative reciprocal motion between a cam being treated and a source of high temperatureheat is produced; to provide such apparatus in which the camshaft may be rotated4 while a bearing is being treated; to'vv provide such apparatus in which high temperatureheating flames are directed from a blowpipe against the surface portions to be hardened and in which the blowpipe may be moved away from the portion being treated and simultaneously therewith the l .supply of gases to the blowpipe automatically turned off; to provide such apparatus in which -each .individualcam may easily be registered in operative relation with respect tov the heating means; and, generally, to provide such apparatus which will be simple in construction and economical in operation.

Other objects and novel features of this invention will become apparent from the following tail the mechanism for rotating lthe camshaft while a bearing is being treated;

Fig. 7 is a partial vertical sectional view, similar to Fig. 5, illustrating the operation of the v indexing device in aligning a cam with the heating means;

Fig. 8 is a fragmentary end view illustrating the mannerv in which the quenching medium is turned off and on; and

Fig. 9 is a top view oflthe heating and quenching means and a cam being treated, as illustrated in Fig. 8.

In general, as in Figs. 1 and 2, apparatus constructed in accordance with this invention may comprise a framework F supporting, in a horizontal position, a camshaft A having laterally extending cams C and cylindrical bearings B thereon. Heating means H and quenching means Q are carried by `a support or carriage U, which lrolls along a tubular `shaft T. Heating means H is adapted to direct high temperature heating llames, preferably formed by a combustible mixture'of oxygen and acetylene, against the oppositely disposed and laterally extending surfaces ofa cam C, r against the surface of a bearing B. Quenching means Q is adapted t-o directa stream ofquenching fluid, such as water, against' the apex of -a heated cam or against the heated I surface of a bearing to harden the same.

During heating, a rod R, reciprocated by power means such as a m'otor M, and provided with adjustable stops S which engage support U when in heating position, causes support U to reciprocate through a suitable distance so that the heating ames will move from one side of the,

cam or bearing tothe other, and the surface the bed of the framework to thereof will be quickly heated to a temperature at or above the critical range. To discontinue heating, support U is moved away froml the heating position, causing tube T is turn and thereby close a valve V controlling the flow of gases which produce the heating iiames. At the same time. as in Fig. 2, tube T, in turning, will turn on avalve V' which controls the supply of quenching uid to quenching means Q, thereby causing the quenching medium to be directed against the heated surface of the camy or bearing. When the support U is moved further away from the camshaft, such as to the dotted position of Fig. 2, the quenching medium will also be turned off, and the support U may then be moved to the next cam or bearing to be treated.

With the support U pos'tioned in front of a cam to be treated, an indexing device I is moved inwardly toward the camshaft in positioning the quenching means, manually through a sufilcient angle so that the laterally extending portion of the camwill engage the indexing device.

During heating of both cams and bearings, support S is lreciprocated, but during heating of bearings, the camshaft itself is rotated. Gearing G, which is driven by motor M, may be disconnected at will or thrown into rotate the camshaft when a bearing is being treated. During rotation, high temperature heating flames are directed against the bearing and the surface thereof is quickly heated to the desired temperature. After heating, support U is moved outwardly away from the cam-shaft to turn off the heating gases and turn on the quenching medium: and, after the quenching period. the support is moved further away 'to turn voil the quenching medium. as in treatingI cams. From the foregoing general description.y the principles of operation of the apparatus will be rent, and the more detailed description which follows will clarify the details of operation of the various parts involved.

Referring again to Fig. 1, the framework F comprises a bed' I0, which may be an I-beam, and to one end of which an upright fixed post I I is secured in any suitable manner, such as by welding. At the upper end of fixed post II is a suitable bushing I2 for a drive shaft I3 connected with gearing G. -At the inner end of drive shaft I3 is anxcd center Il center hole of the camshaft, and disposed radially outward therefrom is a driving pin I5 which is inserted in the indexing hole ofzthe camshaft to rotate the camshaft whilea bearing is being treated. At the opposite end of bed I6 is a movable upright post-I6 which, as in Fig. 3. is secured to the top of the bed or I-beam I0 by a screw clamp having a handle I1. Movable post I6 may be moved to different positions along the top of accommodate camshafts of different lengths. As in Figs. 1 and 3, post I6 is provided at its upper end with a movable center I8, which engages the center hole in the opposite end of the camshaft. enter I3 may be moved toward or away from the camshaft by a handle I9, and is utilized in placing an untreated camshaft in the apparatus, or r moving a treated camshaft therefrom. v

The support or carriage U, as in Figs. 1 and 4, is provided with rollers 2| journalled on stub shafts 22, which are secured in ears 23 extending forwardly and rearwardly from the central portion of support U.

which isv inserted in the two pairs of beveled or v-shaped The central portion of support U, i. e. central with respect to the distribution of weight, is provided with a suitable aperture through which tube 'I passes, and the inner surface of each pair of rollers engages the side of a key or tongue 2l. Key or tongue 2'4 is preferably formed integrally with the tube T on the upper side thereof so that when support U is moved toward or away from the camshaft, tube T will be caused to turn or pivot. One end of tube T is journalled in a bearing 25 secured to fixed post I I, key 2l extending to within a short distance of bearing 25. The opposite end of tube T is journalled in a bearing 26 secured to, or formed integrally with, movable post I6. To permit movement of post I6 along bed I0, a bushing or sleeve 21, as in Fig. 3, is interposed between tube T in bearing 26, the bushing having a groove in which tongue 24 slides when post i6 is moved longitudinally. Y

The upper portion of support U comprises a supporting arm 23, which, as in Fig. 2, extends upwardly at an angle of about 30-and away from the relative location of the camshaft. Heating means H and quenching means Q are secured to the upper end of arm 29, while the indexing device I is pivoted on apin 30 secured to arm 23 substantially midway thereof. The lower portion of support U comprises a weight or mass 3l, which is disposed beneath the tube T and which counterbalances the weight of the heatingand quenching means and the indexing device, so that little effort is required to move the support and the heating and quenching means toward or away from the camshaft. l

Secured to arm 29, or formed integrally therewith, is a fork 32 which is adapted to engage one of adjustable in the position of Figs. 2 or 5. The rod B. reciprocates in bearings 33, secured to or formed integrally with the posts II and I6, as in Fig. l,

The heating means H, as in Figs. 1 and 5, comprises a blow pipe having a body 35 secured to the upper end of arm 29 by a clamp 36, which is \pivotally adjustable through a bolt 31. A sultlable mixer for forming a combustible mixture of gases, such as oxygen and acetylene, is installed within the body of the blowpipe, and tubes Il lead the combustible which heating flames I0 are directed against the two opposite surfaces of the laterally extending portion of a cam C. Each head is provided with suitable outlets for directing a plurality of heating flames, or several relatively wide heating flames, against these surfaces, but, as in Fig. 5, heat is not applied directly to the apex or extreme point II of each extending portion, each apex thus being heatedv chiefly by conduction. `The plurality of heating flames, or the relatively wide heating flames, preferably cover a lateral distance substantially equal to or slightly less than the least width of cam to be treated, the heads being reciprocated during heating so that the heating flames will traverse substantially the entire width of the cam. However, due to a tendency for the lateral edges 42 of the extending portion (see Fig. 9) to become overheated, the reciprocation is preferably terminated at4 points spaced from these edges. Due to the termination of reciprocatory movement at Ipoints spaced from the lateral edges, these edges as well as the apex, will be'heated chiefly by conduction.

Tubes 33 are. preferably relatively inexible, so that they will support heating heads 33 in -proper position, but it will be apparent that a suitable bracket secured to body 36 or clamp 33 stops S when the support U is mixture to heads 33 from I one end, as in Fig. 2, is clamped by means of a may be provided to support heads 39 so that the heads will be adjustable easilytoward or away from one another. In such a case, tubes 38 are merely passed along the heads when it is desiredtolight the heating names. The pilot burner or lighting torch is preferably supplied with a mixture of acetylene and air, or city gas and air, which can burn continuously at little expense.

The quenching device Q, as in Figs. 8 and 9,

heads 39 by a quenching medium supply tube 45, in turn secured to blowpipe clamp 35 by an auxiliary clamp 45. Quenching head t3 is disposed at an angle with respect to heatingheads 39 so that, as in Fig. 8, a jet J of quenching medium, normally water, will be directed against the point or apex di of the heated cam when support U is moved a slight distance backwardly and to the position of Figs. 8 and 9. As support U moves' to this position, the quenching medium is turned on,- in a. manner to be explained later. The quenching head" is preferably provided with a slotted orice, so thaty a solid stream of water will impinge upon the point or apex and spread evenly along each side of the laterally extending portion of the cam. In addition, quenching head 43 and also the slot therein are considerably wider, or extend laterally for a greater distance, than heating heads 39, so that reciprocation of support U is unnecessary^` during quenching. The width of the stream of water or quenching uid discharged by the quenching head is preferably as great as, or greater than, the greatest width of cam or bearing surface to be cooled.

'I'he indexing device I, as in Figs..5 and '7, comprises an arm M pivoted at its lower end on pin 30 and provided at its upper end with an indexing plate 48, secured thereto or formed integrally therewith. Plate 48 is adapted to engage the extending portion of a cam to position the same accurately for heating and quenching when support U is withdrawn the full distance from the camshaft, as in Fig. 7. When in this position, fork 32 will not engage any of the stops,

S.- By means of a handle 49 (see Fig. 1) attached to indexing larm 41, the indexing plate 48 may be moved inwardly and into engagement with the particular cam to be treated, the camshaft being rotated slightly, if necessary, to align the extending portion of the cam radially with the indexing plate.` The indexing device is mounted at the side of the heating and quenching means, and the support'U is moved -a short distance to the left or right, as the case may be, after the particular cam to be treated is indexed,A

to `place the heating and quenching means in proper position so that fork 32 will engage the proper stop S. The indexing device is also moved yback to its normal position of rest, where it will be held bv gravity during the hardening treattoward the camshaft. This moves heating heads `3S into operative position with respect to the cam to be treated, causes fork 32 to engage the proper stop g for reciprocation during heating, and. also causes the heating gases to be turned on automatically.

AForturning on the heating gases automaticalbolt 52 to the extreme end of tube T, beyond fixed post il. Since tube T turns when support,

U is moved toward the camshaft, arm 50 will also turn, and adjustable pins or bolts 53 will depress buttons 54 of valve V, thus turning on the heating gases. As in Fig. l, the heating gases, preferably oxygen and acetylene, are supplied to valve V by inlet hoses 55, while outlet hoses S carry l5 vcomprises a head #i3 supported between heating oxygen and acetylene to blowpipe body 35.

When the surface of the cam being treated has been heated to the desired temperature, the support or carriage U is 4moved backwardly away from the camshaft, from the full toward the dotted position of Fig. 2. As arm rises, the

heating gases will be turned on. In addition, the

quenching medium will be turned on automatically. For this purpose', as in Fig'. 2, arm 50 is provided with a pivoted link 58 having Vat its outer l end a roller 55. When the supportU is moved forwardly, link 58 will pivot upwardly as arm 5G passes downwardly, roller passing over plunger 60 without turning on the quenching medium. When the support U is moved backwardly to the position of Fig. 8, i. e. substantially intermediate the full and dotted positions of Fig. 2, roller 59 will depress plunger 6l! of valve V', thus turning on the quenching medium. The quenching me- 6i` through valve V' and an outlet pipe 62, and

thence through a suitable hose -(not shown) to tube M and quenching head 43. As soon as the heated cam surface has cooled sufciently, support U is moved back to the dotted position of Fig. 2, so that'the quenching medium will be turned oil".

When support U is moved back to the dotted position of Fig. 2, arm 5|) will contact stop 63.

which is bolted to, and is adjustable vertically on, the'side of xed support Il, as in Figs. 1 and' 2. 'Ihis will insure that support U has been moved back the exact distance necessary for proper use of indexing device I.

Referring now to Fig. 1, motor M is mounted on a bracket secured to, or formed integrally with, fixed post Il and is provided with a speed reducer 68 which turns a shaft 61 at a relatively periphery of plate cam 68 during rotation of the vment, and the support U is then moved forwardly slow speed. For reciprocating rod R during the heating operation, a plate camy 68 is mounted on the free or outboard end of shaft 61. 'I'he periphery of plate cam 68 has a suitable eccentric shape so that, `as it rotates, a reciprocal motionv will be imparted to the longer arm of a bell crank 69 which is pivoted on a pin 'lilv secured to post Il. This longer arm of bell crank 69 is provided with-a follower or roller 1|, -which follows the latter. The shorter arm of bell crank 69, which is disposed substantially at right angles vto the longer arm, comprises a fork 12 which 4engages a' driving pin 13, formed integrally with and extending from the side of a clamp 'i4 securedto rod R. As plate cam 68 rotates, the reciprocatory motion of bell crank 69 will be imparted to rod R, and thence to carriage U, through one of adjustable stops S and fork 32.

'I'he procedure involved in treating a bearing is substantially the same as `that involved'in treating a cam, except that no indexing is required for alignment, and the entire-camshaft is rotated relatively rapidly during treatment of a bearing, whereas the camshaft remains stationary during the treatment of the extending portion of a cam. Carriage U may be reciprof cated 4manually to apply the heating flames to.l

kaccommodate the entire surface of the bearing, or an adjustable stop S may be disposed at the correct position for reciprocating support U, as in treating cams.

To rotate the camshaft during treatment of a bearing, gearing G is utilized. As in Figs. 1 and 6, gearing G includes a spur gear 15 keyed to shaft 51 between speed reducer 55 and plate cam 69, and a gear 16 keyed to the outer end of drive shaft I3. A pinion 11, in mesh with spur gear 15 at all times, is adapted tobe moved into engagement with gear 16 by upward movement of a handle 18 extending from a double mounting bracket 19. Bracket 19 is pivoted on shaft 51, and pinion 11 is mounted between the legs of bracket 19 on a pin 80 passing through and secured to the upper ends of the two legs v of bracket '19.

"engages, but bears rather lightly against, the

sides of rod'R. A spring 94, surrounding fork 32, bears at its lower end against a washer 85 which engages rod R, and at its upper end against a washer 85 which engages bracket 19.

A stop 91, as in Fig. 6,I secured to the housing of speed reducer 55 and extending laterally therefrom at a position just behind the lower end of bracket 19, is contacted by the lower end of bracket 19 and prevents further outward is being treated, the f ily. Stops S positions corresponding to the longitudinal positlons of the cams C and, if desired, also correspondins to the longitudinal ings B. The position of heating heads 39 and quenching head 43 is adjusted, and the proportions of the heating gases forming the combustible mixture are regulated so that the heating names will burn properly.

The movable support U is moved to the proper longitudinal position for treating the first surface portion to be hardened, such as a bearing B. In treating a bearing, the indexing device I is not used, but handle 15 is thrown upwardly so that pinion 11 meshes with gear 15, and motor'M started so that the camshaft is rotated relatively rapidly, such as between 25 R., P. M. for relatively large bearings and 250 R. P. M. for relatively small bearings. After the pilot light or lighting burner has been lighted, the support U is moved forwardly, causing arm 53 to move downwardly and the heating gases tu be turned on by pins 53 striking buttons 54 of valve V. The heating and the surface of vthe rotating bearing heated; The support U may be reciprocated manually during such heating', or by motor M, acting through a stop S on rod R After a predetermined time interval of heating, l. e. when the entire surface portion yto be hardened has reached a temperature at or above the critical range, support U is moved backwardly until roller 59 depressa plunger 95 o! valve V', thus turning on the quenching water. A jet J of quenching medium, is thus directed against the heated surface of the bearing, which is still rotatin. When the heated -surface has been cooled suiilciently, `the support movement of pinion 11 when the pinion is moved out `of engagement with gear 16. Movement of bracket 19 in the opposite direction is limited by engagement of pinion 11 and gear 15. Spring 94 acts to hold-bracket 19 and pinion 11 in the position in which pinion 11 meshes withgear 15, or in the position in which pinion 11 is completely out of engagement with gear 15 with the lower end of bracket 19 in contact with stop 91, since for either of the two positions, the distance between rod R and pin any intermediate position. In addition, spring 34 tends to give a snap action to movement of bracket 19 in eitherdirection past the point at which rod R, shaft 51, and pin 53 are in alignment.

The various steps in the hardening of cams just described may proceed substantially as follows:

Assume that a suitable indexing plate 48, conf,

the contour of the cams heating heads 39. a suitable" forming in shape to be treated, suitable quenching head 43, as well .as a plate cam 53 having a periphery suitable in shape for effecting the desired amplitude of reciprocation, have all been provided. The camshaft to be treated is loaded in the apparatus by moving adjustable support I5 along bed III a suillcient distance to the camshaft, placing the camshaft with fixed center Il. in the center hole and driving pin I5 in the indexing hole/in one end of the camshaft, and moving center I8 into engagement with the center hole in the opposite end of the camshaft. Movable center I8 is tightened just enough so that the camshaft will remain in any particular radial position, but can be turned eas- 93 is greater than for and bearings on a camshaft by the apparatus U is moved further backwardly until arm 55 strikes stop 53, the quenching water being shut oi! during such movement. In case the next surface portion to be hardened is that of a cam C.'

motor M is stopped, and handle 13 pulled downwardly to disengage pinion 11 from gear 15.

The support U is then moved to the proper 1ongltudinal position for the cam to be treated, the support remaining, however, in the rearward dotted position of Fig. I next brought forward and the;` camshaft turned so that the extending portion of the cam is in the proper radial position for heating. ,The support U is then moved forwardly until fork 32 engages the stop S set for the particular cam, and

motor 4Lili is started. The support U is then moved further forwardly and into heating position, with heads 39 properly positioned with respect to the stationary cam, the heating gases being automatically turned on ad the heating names lighted, as before.

' perature at or After another predetermined .time interval of heating, l. e. when the surface of the laterally extending portion of the cam has reached a temabove the critical range, the support U is moved backwardly until roller 59 depresses plunger 39 of valve V'. As before, the heating gases will be turned oil, and a ietJ of quenching medium or water will be directed against the 'point or apex 4I of the cam C. spreadingevenly over thetwo sides of the laterally extending portion, as in Fig. 8. When the heated surface has been cooled suillciently, the support is again moved further backwardly, until arm 59 contacts stop Il, the quenching water being turned oir during such movement. The motor M V*It is then stopped and the support U moved to the are clamped on rod R, at suitable 'l positions of bearflames are then lighted, u

'normally water,

2. The indexing device is next position, such as the next cam to be treated,

and the above operation repeated.

In the foregoing manner, all of the cams and bearings upon a camshaft can be treated quickly and expeditiously. For example, a bearing 1% inches in diameter and 1 inch in width, may normally require approximately 15 to 25 seconds for heating, and about 15 to 25 seconds for quenching. Again, the laterally extending portion of a cam 1 inch wide, having a normal diameter of 11/2 inches with the point or apexextending 1/2 inch further outwardly, may normally require about 10 seconds for heating, and also about 10 seconds for quenching. Heating heads, particularly adapted to be used in treating such bearings and cams, will normally consume about 50 to 60 cubic feet per hour of oxygen and acetylene, each.-

After all of the cams andbearings on the camshaft have been treated,smovable center i8 is retracted and the treated camshaft removed from the apparatus. The next camshaft to be treated is placed in the apparatus in the same manner as the previous camshaft, and the treatment thereof proceeds as just described. When a plurality of identical camshafts are being treated, no adjustment of the apparatus is necessary after the various parts are once properly positioned. However, in case'there is a difference in cam. width or cam contour, it is necessary only to change indexing device I and cam plate 68, and

adjust stops S. Heating heads 39 and quenching-'head 43 will be found to be suitable for a considerable variety of camshafts. If itis desired to harden a greater area of each cam, heating heads 39 may more nearly encircle the cam, but the principle of heating the lateral edges as well as the point cr apex of the laterally extending portion chiefly by conduction, is utilized as before. l

From the foregoing, it will be apparent that this invention provides a relatively simple and inexpensive apparatus by which results can be uniformly duplicated in the treatment of a plurality 'of longitudinally spaced portions of elonhigh temperature heat to such surface portions; a

.movable carriage for supporting said heating toward and away from said body; and means pivoted on said carriage for registering such laterally extending portions of said body circumferentially of said body when said carriage ismoved to a predetermined position away from said body, so that a registered portion Will'be inoperative relation with respect to said heating means when said carriage is moved to another position closer to said body. g

3. Apparatus for heat treating Vin succession a plurality of spaced surface portions of an elongated metal body, said surface portions extending laterally from said body at dierent circumferential points, such apparatus comprising, in combination, means for supporting said body; means for applying high temperature heat to such surface portions, said heating means being adapted predetermined normally to heat at any instant only a longitu- -dinal part of such surface portions; a movable carriage for supporting said heating means;

portions of said body circumferentially of said gated ferrous metal bodies, both laterally extending portions as well as cylindrical portions.' Although the treatment of cams and bearings 'upon a camshaft has been described with particularity, it will be understood that the apparatus is suitable for use in the treatment of other metal objects, and that various changes in the apparatus may be made without departing from the spirit and scope of this invention.

What is claimed is: 1. Apparatus for heat treating in succession, a

plurality of spaced surface portions of an elon- 'gated metal body comprising, in combination, means for supporting said body; means for applying high temperature heat to such surface por; tions, said heating means being adapted normally to heat at any instant only a longitudinal part of such surface portions; a movable carriage for supporting said heating means; means for engaging said carriage to position said heating means longitudinally of said body in positionsv corresponding tov eachof such surface portions to be treated; and means forl imparting a reciprocal motion to said carriage engaging means so as to reciprocate said heatimg means' longitudinally of said body.

- 2. Apparatus for heat treating in succession a. plurality of longitudinally spaced surface portions of an elongated metal body, said surface portions extendinglaterally from said/body at different circumferential points, such apparatus comprising, in combination, means for applying said heating means; means for engaging said carriage to position said heating means longitudinally of said body in positions corresponding to each .of such surface portions to be treated; and

means for imparting a reciprocal motion to said carriage engaging means so as to reciprocate said heating means longitudinally of said body.

4. Apparatus for heat vtreatinglin succession a plurality of .spaced surface portions of an elongated metal body, a number of said surface portions extending laterally from said body at different circumferential points and other of said surface portions beingcylindrical, such apparatus comprising, in combination, means for supporting said body; means for applying high temperature heat to such surfaceportions; means for positioning said heating means longitudinally of said body in positions corresponding to each of such surface portions'to be treated, said lastnamed means comprising stops positioned corresponding to such surface portions to be treated;

' power means; means adapted to rotate said body;

and means for selectively connecting and disconnecting said power means to saidrotating means whereby said body may be rotated while a cylindrlcal surface portion is being heated and will ndt 'be rotated when alaterally extending portionis being heated.

5. Apparatus for heattreating in succession a .means for registering such laterally extending plurality of spaced surface portions of an elon- Y Vgated metal body, a number of said surface portions extending laterally from said body at different circumferential points andothers of Asaid surface portions being cylindrical, such apparatus comprising, in combination, means for supporting said body; means for applying high temperature heat to such surface portions; means for positioning said heating means longitudinally of said body in positions corresponding to each of such surface portions to be treated; power means; means adapted to rotate said body; means for selectively connecting said vpower -means to said rotating means whereby said'bo'dy may be rotated while a cylindrical surface portion is being'h'eated; and means for registering such laterally extending portions of said lbody circumferentially.

0f Said body in operative position with respect to said heating means. l

` a pivoted member, said carrig'and said body and -gated metal body, some-of extending laterally froml said body at diiferent heatin `upon and movable along a pivotedmembe said i tions corresponding 6. Apparatus for heat treating in succession a plurality oi spaced surface portions of an elongated metal body comprising, in combination, means for supporting said body; means for applying high temperature heat to such surface portions; a support for said heating means comprising a carriagevmounted upon said pivoted from said body and to turn by movement of said carriage toward and away from said body; means for controlling the operation of said heating means: and means associated with said control means and pivoted member and so constructed and arranged that heating is discontinued upon movement of said carriage and said face portion under treatment.

7. Apparatus for heat treating in succession a plurality of spaced surface portions of an elongated body comprising, ln combination, means for supporting said` body; means for applying high temperature heat to such surface portions; a sup'- port for said heating means comprising a carriage mounted upon and movable along a pivoted member, said carriage and said pivoted member being so constructed and arranged that said heating means is movable toward and away from said pivoted member is caused to turn by movement of said carriage toward and away from said body; means for directing a quenching medium against a heated surface portion; means for controlling the operation of said heating means; means for controlling the now o'i' quenching medium; and means associated with each of said control l means and said pivoted member and so constructed and arranged that heating is discontinued and the quenching medium is turned on upon movement pf said carriage and said heating means away from a surface portion under treatment.

8. Apparatus for heat treating plurality of spaced surface portions. of an gated metal body as defined in' claim '1, in the quenching medium is discontinued upon further movement of said carriage and said heating .in succession a elonsald pivoted member is caused which '1 and movable along nected with said power means for imparting a reciprocal motion to said carriage means so as to reciprocate said heating means longitudinally of said body during heating; means adapted to rotate said body; lmeans for selectively connecting said power means to said rotating means during the treatment of a cylindrical ,surfacev portion; means for directing a l quenching medium against a heated surface porheating means away from a sur-' tion; means for controlling the operation of said heating means; means for controlling the flow of quenching medium: and means associated with said pivoted member and so constructed and arranged that heating is quenching medium is turned on upon movement of said carriage and said heating meanslaway from a surface portion under treatment.

l0. Apparatus for heat treating in succession a plurality of spaced surface portions of an elongated metalA body comprising, in combination, means for supporting said body; means for ap plying high temperature heat to such surface portions, said heating means being adapted normally to heat at any instant only a part of each surface portion longitudinally of said body; a support for said heating means comprising a carriage mounted upon and movable along a pivoted member, said carriage and said pivoted member being means away from a surface portion under treatment.

`9. Apparatus for heat treating in succession a plurality of spaced surface portions of an elonsuch surface portions portions being cylindrical, such apparatus comprising, in combination, means for applying high temperature heat to such surface portions, said heating means being adapted normally to heat at any ins nt only a part of each surface portionlongitu ally of` said body; a support for said means comprising a carriage mounted member being solcon- .struc y is m vable toward and away from said body and said/ pivoted member is `caused to turn by movement of said carriage toward 'and away from said body; means Apivoted on said carriage for registering the laterally extending portions of said body circumferentially of said body and in operative relation with respect to said heating means; means for engaging said carriage to position said heating means longitudinally to each of said surface portions to be treated; power means; means con-y d and arranged that said heating means means connected of said body in posiso constructed and arranged that said heating means is movable toward and away from said body and said pivoted member is caused to turn by movement of said carriage toward and away from said body; means for engaging said carriage to position said heating means longitudinally of said body in positions correspon each of said surface portions to be treated; power means; means connected with said power means for imparting a reciprocaimotion to said carriage engaging means so as to reciprocate said heating means longitudinally of said body during heating; means for controlling the operation of said heating means; and means associated with said control means and pivoted member and so constructed and arranged that heating is discontinued upon movement of said carriage and said heating means away from a surface portion under treatment.

11. Apparatus for heat treating in succession a plurality of spaced surface portions of an elongated body comprising. in combination, means for supporting said body; means for applying high temperature heatlto such-surface portions, said heating means being adapted normally to instant only a part of each portion longitudinally of said body; a support for carriage mountied upon and movable along a plvoted member, said carriage and said pivoted member being so constructed and arranged that said heating means is movable toward and away from said body and said pivoted member is caused to turn by movement of said carriage toward and away from said body; means for engaging said carriage to position said heating means longitudinally of said body in positions corresponding to each of said surface portions to be treated; power means;

with said power means for imparting a reciprocal motion to said carriage engaging means so as to reciprocate said heating means longitudinally of said body during heating; means for directinga quenching medium against a heated surface portion; means for controlling the operation of said heating means; means for controlling the now of quenching medium; and means 'associated with each of said discontinued and the surface control means and said pivoted member and so constructed and arranged that heating is discontinued and the quenching medium is turned on upon movement of said carriage and said heating means away from a surface portion under treatment.

12. Apparatus for heat treating in succession a plurality of spaced surface portions of an elongated metal body. said surface portions extending laterally from.sa1d body at different circumferential points, such apparatus comprising, in combinatlon, means for applying high temperature heat to such surface portions; a movablefcarriage for supporting said heating means, said carriage being movable longitudinally with respect to said body and 'also beingl movable toward said body; meansfor engaging said carriage to position said heating means longitudinally of said body in positions corresponding to each of said surface portions to be treated; and means for im, parting a reciprocal motion to said carriage Aengaging means so as to reciprocate said heating means longitudinally of said body.

- LLOYD W. YOUNG.

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