US2062769A

US2062769A - Quenching machine

Info

Publication number: US2062769A
Application number: US677004A
Authority: US
Inventors: Isaac W Sprink
Original assignee: LOGAN GEAR Co
Current assignee: LOGAN GEAR Co
Priority date: 1933-06-22
Filing date: 1933-06-22
Publication date: 1936-12-01
Anticipated expiration: 1953-12-01

Description

- l, .1936 f l. w. sPRlNK I QUENCHING MAcHwE:

Filed June 22, 1933 a 'sheets-sheet 1 l, 1936. l. w. sPRLNK QUENCHING yMACHINE l Filed June 22, 1935 s Sheets-sheet :s

3mm ISAAC WPR/NK Dec'. 1, 1936. i. w. sPRlNK A QUENCH'ING MACHINE Filed June 22, 193s 6 Sheets-Sheet 2 ISAAC 5pm/VK( Dec. 1, 1936.

QENCHING MACHINE Filed June 22, .193s s sngetssheet 4 Dect. l, 1936.

l. W. SPRNK QUENCHING MACHINE v Filed Junezz, 1933 e shams-sheet' s Dec. 1,1936. l. w. sPRLNK QUENCHING MACHINE 4es sheets-sheet e Filed June 22, 1955 fg FR www Patented' Dec. 1936 narran sii-Aras vParana artica H I nunncncmn poration of Ohio Application June 22, 193s, serial No. 677,004 1c claims. (ci. 26e-6).

containing the quenching bath, andan article support or table which is automatically movable 15 into and out ofthe bath by means controlled by the operator of the machine. A

- A further object of the invention is the provi-. sion of a machine of this character incorporating readilyoperable means for retaining the article to be quenched in proper position upon a support, and of means for simultaneously immersing the article in the quenching bath and directing jets of quenching fluid upon the article.

A further object is the provision of means for' retaining the article to be'quenched in position upon a support in such 'a manner that during quenching, tempering or change of the temperature of the article, the same 4is permitted to undergo its natural contraction or expansion, at

the same time avoiding distortion thereof.

Still a further object is the provision of a quenching machine in which the article support is conveniently positioned to insert and withbeing movable for immersion'into the quenching bath by means under'control of the operator.

Still a further object of the invention .isthe .provision of simple and effective means for agi- 0 tating the quenchingbath so as to provide a substantially uniform-temperature throughout the bath during quenchingoperations. A

Further objects and advantages are within the scope of this invention such as relate to the ar.-

rangement, operation and function of the related elements of the structur, to various details of construction and to combinations of parts, elements per se, and to economies oi.' manufacture and numerous other features as will be apparent ,-,0 from a consideration of the specication and .drawings of a form of the invention, which may be preferred, in which;

= Figiire 1 is a side elevational view of a machine,

of my invention illustrating one -fOrm 0f 1.15.@ t0 which the invention may be put;

A draw articles to be quenched, the article support Figure 2 is a top plan view of themachine iliustrated in Figure 1;

Figure 3 is a vertical sectional view taken substantially on the line 3--3 of Figure 2;

Figure 4 is a view similar to Figure-3 showing 5 an article imposition during the quenching operation;

Figure 5 is a transverse vertical sectional view taken substantially on the line 5-5 o! Figure 4;

Figure 6 'is a view taken substantially on the 10 line 6-8 of Figure 4; Y Figure 7 is a transverse sectional view taken o n the line 'I-l of Figure 4 illustrating thearticle retairung means and method of supporting and quenching the article; 15 A Figure 8 is a transverse view taken on the line 8--8 of Figure 4 illustrating the. article retaining means and method of'supporting and quenching thearticle; A

Figure 9 is an enlarged top plan view illustrat- 20 ing the method of operating the article retaining'l means, certain parts being removed.

, I have illustrated a form of my invention as a quenching machine particularly adapted for quenching or tempering tubular axles, but it is to 25 be understood that the invention -is susceptible of change and variation to render it suitable for usein quenchingor hardening various articles of manufacture.

Referring'to the drawings in detail, the ma- 30 chine includes a substantially rectangular tank or receptacle Ill which forms the major `support or frame structure for the other elements of the machine as well as a container for the quenching iiuid'or bath I;I. Supported at the rear por- V35 tions of the side walls of the receptacle vIII is a pair of supporting brackets I2fand I3 which are .xedly secured tothe tank by means'of bolts I4,

these brackets being provided with upwardly projecting portions IG and I1. The portions IB and 40 I1 are formed intermediate their ends with enlarged bosses I8 in which is journalled a shaft 20 extending longitudinally ofthe receptacle I 0. The upward extremities of members I6 and- I1 -are provided with enlarged bosses v22 within 45 which is positioned a second shaft 23 substantial- A 1y parallel and co-extensive with shaft 20. The

shafts

20 and 23 are held in proper spaced reladownwardly projecting ear portions 28 which are bored to receive a pintle or pivot pin 29, the ears 26 straddling theA enlarged

ends

38 and 3| of the arms and 26, the ends being provided with bearing bushings 32 journalled for movement on the pivot pin 29.

Journalled on shaft 23 and held in proper spaced relation by means of collars 35 pinned to the shaft, is a pairl of forwardly extending arms 36 and 31 which are enlarged at their forward ends as at 38 and transversely bored to accommodate pivot pins 39. The pivot pins 39 extend into and are can'ied` by brackets 40 which extend upwardly and rearwardly of the bed plate 21 being secured toC the latter by means of bolts 42.

It is to be noted that the

arms

25, 26, 36 and 31 form the supporting means for the bed plate i 21 and parts carried thereby. With particular reference to Figure 1, the axes of

shafts

20 and 23 and the axes of the pivot pins 29 and 39 form the apices of a parallelogram of such a. nature securing the axle in position are of a particular that when shaft 20 is rotated in journals carried by brackets I2 and I3 in a clock-wise direction the forward extremities of

arms

25, 26, 36 and 31 will be lowered in a parallelogrammatic relation to the axes of the shafts and pivot pins whereby the bed plate 21 and associated parts may be lowered into the quenching bath the bed plate and its associated parts being maintained in a horizontal position during the downward movement bymeans ofthe above described method of support.

In order to facilitate ease of operation of raising and lowering the work support or bed plate 21 and parts carried thereby, a balancing means is provided. This balancing means consists, in the embodiment shown, of an arm 44 fixed upon an extremity of shaft 28 exteriorly of the tank or receptacle I8, the arm 44 extending rearwardly of the receptacle I8 is formed with an arcuately shaped end 45 to which is connected a cable or chain 46 which overlies the arcuate portion 45 of the arm 44 beingconnected at its lower extremity to a weight 41. The vlength of the lever arm 44 and weight 41 are proportioned to approximately balance the

arms

25, 26, 36, and

`31 and the bed plate 21 and associated parts so that comparatively little eifort is required to operate this mechanism;

Fixed to an extremity of the shaft 20 is an arm 50 having an arcuate extremity 5| to which is xed one end of a cable 52, the other end being connected to a piston rod 53 the latter in turn being fixed to a piston 54 reciprocably positioned within a cylinder 55. The operating cylinder 55 is secured to the exterior of an end wall,of the casing or receptacle Ill by means of bolts 56. The mechanism may be operated by any suitable means, as for example hydrostatic or pneumatic means, in the form shown the means employed being pneumatic, the air being conveyed tothe ends of the cylinders by means of tubes or pipes 58 and 59. The ingress of air into the cylinder 55 is controlled by means of valves contained in a box-like receptacle -60 operated by a foot treadle 6| as particularly shown in Figures 1 and 2.

'I'he machine of my invention is particularly illustrated as adapted for use in tempering or quenching tubular axles and while -the means for configuration to accommodate the same, it is to be understood that the means may be utilized acoarce for accommodating articles of other configuration for quenching 'or tempering. In the embodiment illustrated, the means comprises two types of retaining devices, first a means for securing the ends ofthe axle tube, and second, a means for retaining intermediate portions of the tube.

'I'he iirst mentioned of these devices will now be described. 'As the device for retaining the axle ends are the same in construction and operation, a detailed description of one will suice for both, the structures being shown in Figures 3 to 6 inclusive of the drawings. The bed plate 21 of the movable table is provided with a central longitudinally arranged groove or way 65 to upper surface of plate 61 being held in slidable relation with plate 61 by means of removable way blocks 12 which are held to base portion 18 of casting 69 by means of screws 13. The base portion 10 is provided with a machined groove 15 within which is received an anvil or supporting block 16 which is preferably fabricated of hardened steel and -is adapted to form a locating,

or positioning support for the end of the axle tube. The anvil 16 engages the lowermost surface of the end of axle tube A as illustrated in Figure 4 to properly position this portion of the axle in the quenching machine. is provided with a transversely extending boss 18 which is bored to receive a pin 19, the forward end of which is adapted to engage and properly locate the side of an end of the axle tube A as particularly illustrated in Figure 5. The other end of pin 19 is of reduced diameter as shown at and is threaded into a portion of the bore in the boss 18 and also receives a nut 8| which serves as a locking nut. The pin 19 may be adjusted by a manipulation through the insertion of a screw-driver into a kerf in the end thereof and may be locked in adjusted position by nut 8|.

It will be seen from the foregoing description that the anvil 16 and the pin 19 serve as locating and positioning-means for two surfaces at the end of thel axle tube. The casting 69 is formed with an upwardly projecting portion incorporating a cylinder ,within which is Slidably positioned a piston 86 connected to a substantially vertically movable plunger 81 operating in a stuffing box or gland. 88 formed in the casting 69. Formed in the casting at points respectively above and below the piston 86 are apertures 89 and 98 which communicate with tubes 9| and 92 in turn communicating by means of other tubes 93 and 94 with a valve 95 controlled by a foot treadle 96 as particularly illustrated in Figure 2. The tubes 9|, 92, 93, and 94 are adapted through the control of valve 95 to admit air into and out of the cylinder 85 so as to depress or retract piston 86 and likewise plunger 81 into or out of contact with'an upper surface of the end of the axle tube A as particularly illustrated in Figures 4 and 5 wherein the plunger 81 is shownin contact with the end of the axle tube The casting 69 cylinder illustrated in dotted lines at 99 in Fig ure within which is'reciprocably positioned a piston |00 which is xedly secured to a plunger 0| by means .of a nut |02 threaded upon a reduced end ofplunger |0|. This cylinder 99 is' provided with inlet and outlet ports similar to the

ports

99 and 90 of cylinder 85. 'Ihese ports are interconnected with tubes 9| and 92 by means of tubes |03 and |04 as particularly illustrated in Figure 1 and through the medium of tubes 9|, 92,93, and 94 to the valve 95.` Depression of foot treadle 96 causes a rushof air or other operating medium through tubes 93, 94 and 9| and 92 to injectl air or the like above pistons 86 and |00 substantially simultaneously, thus bringing plungers 81 and |0| into forcible contact with the upper and lateral surfaces ofthe end of.

the axle tube A as particularly shown in Figure 5, thus properly locatingthe end of the axle tube against the anvil16 and locatingpin 19. The` pressure maintained' back of pistons 86 and l|00` during the quenching operation xedly limits and maintains the ends of .the .axle tube in a predetermined position both horizontally and vertically` After the axle is quenched,- however, it contracts. and due to its `,comparativelyf-great longitudinal dimension the contraction. amounts` to considerable throughout its length which nor- I Aaddition provided with recesses |3| to permit mally would tend to pull the ends of the axleinf` wardly. This inward contraction', however, is permitted by reason` of slidably positioning the castings or members 69 which carry the axle retaining pistons so as to permit the ends of the axle, the anvils 16 and pistons and associated parts to move' bodily inwardly with the axle against the tension of springs |03 particularly illustrated in Figures 3 and 4. After the quenching operation and the axle is removed from the machine in a manner to' be hereinafter described the springs |03 return the casting -69 and its base portion 10 and parts carried thereby to their outmost position as shown in Figures 3 and 4. The springs |03' act against lugs |04 car- -rled by threaded studs |05 threaded into bores permitting the axle end retaining means of the-A machine to movewith the axle so that portions y of the latter Aare not in any wayv distorted during quenching.

'I'he retaining means for the central portions of the axle will now be described. Securedtothe bed or base plate 21 of the machine intermediate the movable castings or membersA (i9 is a plate which also has a tang |`|2 similar y, to the tang- 66 which also engages and ts'in groove 65 this means serving to properly arrange'.

,plate with the other parts ofthe machine carried by the table 21. Mountedupon -plate l I is an elongated casting or supporting member ||4 which is secured to plate.||| by means of screws ||5. Carried by the member ||4 are a plurality of sets or pairs of cylindricalbushings rlating gear I4 l ||6. snugly fitting in vertical bores in the member H4 as particularly illustrated in Figures 7 and 8.v Revoiubly mounted within bushings |I6 are a, plurality of sets of shafts ||8, ||9, |20, two shafts making up each set. l'ixedlyv secured to the lower ends of shafts 8, ||9 and |20 respectively are setsof gears |2|, |22, |22 and |23, the ,gears being held to the shafts by means of screws |24. The sets of gears |2|, |22, |22' and |23 have teeth only throughout substantially half of their peripheries for a purpose to be hereinafter explained.

`The upper portions of shafts ||8, H9, and |20 are transversely slotted to snugly receive and fixedly retain members or clamping gates |26, 21,' and I 28 as particularly illustrated in Figure 7. The gates |26 are arcuately cut away as at |29 to accommodate the axle, tube, or other member to be quenched designated at A. The arcuate portions |29 of the gates are further provided with recesses |30 to permit the application of the4 quenching uid to the axle or member to be quenched which will be hereinafter more fully explained. The gates |28 are substantially of the same configuration as the gates |26 having substantially the same cut-away portions in order e to accommodate, receive and clamp the axle or other member to be quenched.

The gates |21 of the central set of clamping means are particularly illustrated in Figure 8 and are cut away or provided with semi-circular recesses to accommodate the, axle and are in quenching fluid to readily reach the' axle Aportion which' is within the clamping gates.

The means for simultaneously rotating the gates |26, |21, and |28 are particularly illustrated in Figure 9 which means-includes a horizontally 1 positioned longitudinally movable operating member |35 which is provided with toothed rack portions- |36, |31, and |38. Suitably journalled parallel and adjacent to one of the shafts ||9 is a shaft |.40 and fixed to its lower end'is a trans- Also fixed to shaft |40 is an' arm |4| keyed or otherwise xed thereto as at |42 which is connected by means of a clevis |43 and pin |44 to a rod |45 which is provided at its opposite extremity with a piston |46 operating in a cylinder |41. The cylinder |41 is also provided with a lug |48 whereby the cylinder is pivoted by means of a pin |49 to'a bracket |50 integrally formed as a part of the bed plate 21 of the machine. The cylinder |41 is pivotally supported, as there is oscillatory movement of the cylinder when the piston |46 and piston rod |45 are moved to operate shaft`| 40. The piston |46 is also preferably uid operated as by air or the like conveyed to and from the cylinder bymeans of conduits |52 andv |53 which'communicate with a,valve mechanismcontained within a housing |56 operated by means of a treadle |61 similar to the treadles 6| and 96.

the interposition of. intermediate vgears 4|25 is provided in order that the yclamping gates |28 ing gates |26 move inwardly. Figure 9 illustrates the position of the gates |26, |21, |28 in axle clamping and quenching position. When air or other medium is applied through conduit |5.3 the piston |46 is moved rearwardly bringing clevis |43 to the position shown in dotted lines inFigure 9, causing a rotation of shaft and the various gears hereinbefore described causing the axle clamping gates to move in the directions respectively indicated by the arrows adjacent each gate, the movement of the member |35 being indicated also by means of directional arrows. air through conduits |52 and |53 simultaneously opens or closes all of the axle clamping gates. It is to be understood that while in the embodiment illustrated six gates or three sets, two gates to a set are illustrated, any number of clamping gates or means may be operated through the mechanism hereinbefore described.

The receptacle I0 contains the quenching or coolingmedium as for example, water, oil or other suitable material, in the embodiment illustrated water or oil being a satisfactory medium. 'I'he 'quenching uid comes from a supply (not shown) by means of a conduit |60 in which is a valve |6|\ controlling the flow of fluid into the receptacle, the conduit |60 having a horizontal discharge portion |63 positioned near the floor of the receptacle I0. An overflow pipe |62 is provided whose upper extremity is=so positioned as to determine the lever of the quenching fluid in the receptacle I0, any excess fluid being carried away by means of the pipe |62. In addi- -tion to this supply of cooling medium, it is desirable to apply specificjets of quenching uid to the article to be lquenched adjacent the clamping gates |26, |21 and |28. To this end a quenching fluid supply conduit |65 is provided having a rubber tube or other flexible-connection |66 with a. tube |61 carried by the arm 26 which in turn supports the, table 21 and moves with the arm. Connectedwith tube |61 is a check valve |69 which in turn is connected with a tube |10 to distributing conduits |'1| land |12 which in turn are provided with comparatively small tubes |13 the ends of the tubes |13 terminating so as to direct quenching fluid upon the article to be quenched at the points of contact of the gates |26, |21, |28 with the article. By this means an adequate supply of quenching fluid is applied y to the article during the quenching operation in addition to` its immersion in the fluid.

The valve |69 is adapted to be operated to permit the passage of quenching fluid to the tubes |13 only during the immersion of the table 21 and article carried thereby in the receptacle I0. During this operation, the valve is operated by arm |15, the outer end of which is plvotally connected to a' cable |11 which passes upwardly over pulley |18 carried by an arm |19 forming the horizontal part of the frame structure |80 supported at the rear wall of the receptacle I0 as particularly shown in Figures 1 and 2 The cable |11 passes over another pulley |8| having'its 'other extremity secured to a weight |82 which normally rests upon a pedestal or support |83 located adjacent the rear-of the receptacle I0 and for causing the oscillation of arm |15 to open or close valve |69 as hereinafter explained and con- In the above manner, the application of.

trol the flow of fluid through the jets or tubes |13 to the article to be quenched.

In the operation of this portion of the mechanism, the valve |69 is in closed position when the parts are in the position indicated in full lines in Figure 1 with the article 4elevated above the quenching fluid in which position the weight |82 rests upon the pedestal |83, the weight |84 on the opposite'end of the cable serving to hold the arm |15 in the position shown closing the valve |69 so that no quenching fluid is flowing through tubes |13. When, however, the table 21 carrying the article to be quenched is lowered into the quenching uid by a manipulation of food pedal 6|, the weight |82 being heavier than the weight |84, causes arm |15 to oscillate, with the lowering movement. of the table into the fluid, in a. clockwise direction as illustrated in dotted lines in Figure 1 to a position opening the valve |69 and permitting the flow of quenching fluid through tubes 13 to the article4 adjacent the clamping gates, the excess of movement of arm 25 into the quenching fluid carrying with it the fvalve |69 and the arm |15 being absorbed by upward movement of the weight 82 to dotted position as illustrated in Figure 1 thus maintaining the valve |69 open during the immersion of the article in the quenching fluid and a consequent ow of additional quenching fluid directed.

upon the article through the tubes |13. When the table is moved upwardly to bring the article ,out of the quenching bath in receptacle I0, the weight |82 is again brought to rest upon pedestal |83 in which position weight |84 then operates to oscillate arm |15 in a counter-clockwise direction to close valve 69.

It has been found that the additional quenching jets |13 are not always required for satisfactory quenching depending upon the character and type of the article being quenched, but has in some instances been found desirable in order to provide a satisfactorily uniform quenching of an article.

I have also provided means for continuously agitating the quenching fluid in receptacle I0 which is obtained by means of agitating propellers '|90 journalled upon bearing brackets |9| carried by the side walls of the receptacle l0 and operated by means of pulleys |92 and belts |93 connected to a source of power as for example, motors |94 carried by the walls of the receptacle I0 as particularly illustrated in Figures 1 and 2. By this means, the'energization of the motors |94 operate to rotate the propellers |90 to continuously agitate the quenching fluid in receptacle I0 and thus tend to keep the quenching iiuid at a substantially uniform temperature throughout to further enhance thc satisfactory quenching of the articles.

The operation of the device of my invention is as follows: When the arrangement is used for quenching axles, the axle is first placed in position as illustrated in dotted lines in Figure 3, in full lines in Figure 4 and the treadle 96 depressed by the operator which controls the flow of air or actuating fluid to cylinders and 99 causing the plungers 81 and |0| to engage and iixedly secure the ends of the axle in position against the stop 19 and the anvlls 16. The treadle |51 is then depressed by the operator which controls the air flow to cylinder -|41 which simultaneously revolves the gates |26, l|21 and |28 into the position shown in Figures 4 and 9 to retain or clamp the intermediate portions of the axle. The operator then depresses the treadle 6| which controls the ow of air or actuating uid to cylinder 55 perthe piston 5ft therein to a left hand position and as the Weight of the supporting table 21 and parts carried thereby including the axle to be quenched are heavier than the weight tl and arm lill, the table and axle drop under the force of gravity and become immersed in the quenching bath il contained in receptacle iii. At the 'same time that the table and axle are immersed in the bath, the valve 69 is actuated through the relative movement of arm H5 caused by weight 82 opening valve 969 and permitting quenching fluid to ow through tubes H3 so as to direct additional quenching uid upon the axle at the point of engagement of the gates 26, l2?, l28 therewith so that the axle may be chilled or tempered uniformly.

As the axle is chilled in the quenching bath it contracts carrying with it frame castings or member t9 which slide inwardly longitudinally upon the ways or plates 6T against the tension of springs M33. In this manner the normal contraction caused by chilling of the axle is accommodated without permitting any lateral distortion of the axle. ciently the operator again depresses `treadle 5t which reverses the direction of the flow of air or actuating fluid into 4cylinder 55 moving piston 54 to the right hand position as show n indotted lines in Figure l which elevates or raises the table, parts carried thereby and axle out of the quenching fluid or bath the .parts moving to the position indicated in full lines in Figure 1. The operator then again depresses treadles @6 and l5? which causes air or actuating fluid to flow in a reverse direction in

cylinders

85, 99, and UV! to withdraw plungers 81 and lill from engagement with the ends of the axle and also to open the clamping gates i26, l2?, and t28 after which the axle may be lifted out of the machine and the operations repeated with other axles. It is to be noted that upon release of the plungers 8l and lili in engagement with the ends of the axle the frame member 69 and parts carried thereby immediately move to their initial positions under the influence of spring 03 in position to receive another heated axle.

It is apparent that, within the scope of the invention modifications and different arrangements may be made Aother than is herein disclosed, andthe present disclosure is illustrative merely, the invention comprehending all variations thereof.

What I claim is:

l. in a quenching machine, means for retaining an object to be quenched comprising a pluralitysf object retaining means; va quenching medium; means for causing relative movement between said object retaining means and the quenching medium to eiect a quenching of the object; means operable upon relative movement vbetween the object retaining means and the' quenching medium to cause a flow of lquenchin medium directedupon the object.

' 2. In a. quenching' machine; a quenching medium; a retaining means for an object to be quenched; movable means for submerging 'said object retaining means in the quenching medium; a plurality of tubes for directing quench--4 ing uid upon said object; and automatic means operable simultaneously with submersion of the object to cause ow of quenching medium through said tubes to the object to be quenched.

3. In a quenching machine, a reservoir adapt- When the axle has cooled sufii-v ed to contain a quenching medium; a table; means for moving said table into and out of the quenching medium; a plurality of means carried by said table for retaining and guiding a member to be quenched, said retaining means being positioned adjacent the ends of the object to be quenched; said means being mounted for longitudinal movement with the object as the latter is contracted and cooled by the quenching medium, thegqiding means being positioned intermediate said retaining means; the engage-y ment of said guiding means with the object being such as to permit relative sliding movement between the object and said guiding means during the quenching operation.

4. In a quenching machine, a table adapted to .support an article to be quenched; meansA carried by the table and movable to a position for guiding intermediate portions of the` article dur"-` ing longitudinal movements .and restricting lat-I eral movement thereof during quenching; an anvil adapted to support an end of the article; said anvil being capable of longitudinal movement;

and clamping means adapted to engage and Ahold the article in contact withthe anvil, said clamping means being movable with the anvil and the object during the quenching operation.

5. In a quenching machine, a supporting table;

ed to contain a quenching fluid; a movable table;

a plurality of links supporting said table; means for substantially counterbalancing the weight of said table; said tabley adapted to support an object to be quenched; iiuid actuated means for lowering and elevating said table into and out of the quenching medium; and fluid actuated means carried by said table for clamping the `object to be quenched thereto.

7. A quenching machine including a reservoir,

adapted to contain a fluid quenching medium; a table; means for moving said table into and out of said quenching medium; a plurality of anvils carried by said table and capable of longitudinal movement with respect thereto, said anvils adapted to support the extremities of an object to be quenched; means for clamping the object to said anvils; a plurality of pivoted guide mem'- bers positioned between said anvils and adapted to retain theobject against lateral movement; a plurality .of quenching fluid conducting tubes terminating adjacent the pivotedguide members and automatic means operable y,upon movement of the table into the bath of quenching fluid for ejecting uid from said tubes upon the object.

8. A quenching machine including a reservoir adapted to contain quenching medium; a'table; means for moving said table into andvout of said quenching medium; a plurality of anvils carried by said table and capable of longitudinal movement with respect thereto,`said anvils adapted to support the extremities of4 an object to be quenched; fluid actuated plungers positioned adjacent said anvils and adapted to engage and clamp extremities of the object to the anvils; a plurality of pivtally supported object guiding members arranged between said anvils; rack and gear' mechanism for actuating said guiding members; and fluid actuated means for initiating the operation of said rack and gear mechanism.

9. In a quenching machine a reservoir adapted to contain a quenching iiud; a table; means including a plurality of pivoted arms supporting said table; fluid actuated means for submerging said table in said quenching iiuid; means engageable with the ends of an object to be quenched for retaining the same upon said, table; a plurality of sets of pivotally supported guiding members engageable with the object intermediate its ends; and rack and gear mechanism for simulaosavea otal movement of said members; and fluid actuated means for operating said pivotally supported members.

ISAAC W. SPRINK.