US2374968A - Drying apparatus for cylinder heads - Google Patents

Description

May l, 1945. F. c.AREY ETAL 'DRYING AFPRATUS FOR CYLINDR HEADS 5 sheets-shed 1 Original Filed Jan. 29, 1941 May l, 1945- F. c. AREY ETAL l DRYING APPARATUS FOR CYLINDER HEADS Original Filed Jan. 29, 1941 5 Sheets-SheetZ May l, 1945. F. c. AREY ETAL DRYING APPARATUS FOR CYLINDER HEADS original Filed Jan. 29, 1941 5 Sheets-Sheet I5 May l1, 194s.

F. c. AREY ETAL DRYING APPARATUS FOR cYLrNnER HEADS original Filed Jan. 29, 194i 5 Sheets-Sheet 4 May 1, 1945- F. c; AREY l-:TAL 2,374,968-

DRYING APPARATUS FOR CYLINDER HADS K oignal Filed Jan. 29; 1941 5 Sheets-Sheet4 5 FS mm1. ml.

M672 am? Patented May 1, 1945 U Nimoy l STATES PAT oFFI c E l n zageifretsg` i i DRyING APPARATUS Fort` orLINDnR HEADS Fred" C. Arcy and De Los E; Hibner, Du Bois, Pa.,

assignorse to Vu-l'can Soot `Biower Corporation,

acorporationotPennsylvania. t

Original application J anuary' 29, 1941 S'eri'al No.

376;454'. Di'vided and this application May 22,

1943*, Serial No.488,048

(onse-45,) t.

apparatus for Vwashing cylinder heads and then' delivering them to drying means, so that while one or, more heads are beingwashed anequal number are beingdried; `The invention forming" the subject4 of the present. application. relates only to that. part of the apparatus for,` handling and drying. the heads after they have been washed;

and' it may be said!` to have. for" its object toi produce a simple and ecient automatic apparatus for quickly drying. 'wet "heads and. moving them out ofthe way to make room" for. others. i

The" Various featuresA 'of' novelty charactering our invention will hereinafterbe pointedout with particularity in the cl'aimsjbut, fora fullunderstanding of. our invention and" of its objectsand advantages'reference may bejhad t0 thefollowing detailed" description takenin connection with the accompanying drait'ings,` wherein:

Figure 1" is a viewj illustrating" in side elevation a combined and".l drying machine. or apparatus embodying lthe lpresent invention,I a portion ofthe initial' washing apparatus being shown in section; Fig. 2 is. a section on, a somewhat larger scalethan Fig.V 1,1 on line 2,-,-2 of Fig.` 1, showing: only the rotatable cage and the tripping devicemountedin the casing' below the same; Fig. 3 is a.- section onan enlarged scale, taken on` line' 3"--3' of Fig. 2";"Fig-14` is ahorizontal section through the rear endj ofthe casing in which the work is washed and ajtop plan view ofthe work-receiving apparatus, immediately in rear of the casing; Fig. 5 is' a top plan viewkof. the apparatus that lies justlo the` right of that' shown in Il'i'g.y 4 and' which receives the workfrom. the latter'and dries it; Fig.` 6 is amore or less diagrammatic vien/illustrating fragments ofthe apparatus appearing inFig. 5, and showing acylinder head at the limit of; its rearward movement before` it isshifted into position forbeingdried; Fig: '7 is. a. view 'siinilazito Fig; 6,` showing the cylinder head` in the position wl'iich` it occupies at the end" of' the drying operation and" again begins its: travelsA toward'` the` rear, namelyjtoward theright, as viewedinI liigs.`5j and 7; Fig. 8 isJ a section taken on line Bit-13' of Fig; 5"; Fig. 9 is a sentieri-through the mainfand pilot valves shown in- Fig. 8, and` there being also illustrated `the tripping means; for thepilot valve: Fig. l0 isf ai section: origine" l--N oijFig. `5, the greater portion or the` hollow drying plate being omitted; and

Fig: lil is-"aV side elevation of the clutch being shown closed-'in Fig. 1l` and open in Fig. 10.

Referring toV Figs: 1 and 210i the drawings, l represents' a large housing or casing within which is a long: cage 2 rotatable about a horizontal axis extending fromiront to rear of the casing; the cage containing open-ended compartments for receiving four cylinder heads A distributed toformr a hollow square. This i cage is adapted tov be turned step by'step, through angles of' ninety degrees and to come to rest at the end of each step with one of the compartments at the bottom and' in aboutthe same-plane as a feedingtable 3 at the front end of; the casing; While the apparatus is in operation, cleaning iiuids are discharged upon the' heads and' carried around bythe cage. and then right-side` up again during the time it remains in the cage, thereby permitting the washingjwater orother liquids to drain from the same and carry away such loose foreign. matter as is not. driven ol directly by the cleaning jets.

Because there ls but a single driving and controlling mechanism for both the washing apparatus and the drying apparatus, a` description of the machine as a whole is required for a full understanding.l of the drying apparatus.

`A's shown in Fig. 1", there is an openingfl in the pushed out through the casing upon these rollers.

Above the rollernearest. the casing is a cooperating roller It, whereby the rearwardly-moving head is gripped and positively moved along until it has been brought clear of the casing and `is delivered to another set of rollers to be hereinafter described. The rollers Il), as best shown in Fig. 4,. are driven from a suitable shaft I2 mounted a gearv housing I4: extending along corresponding `ends of the rollers and having bearings for those ends; there being suitable i driving gears Yl'lfietween. the shaft I2 and each of the` rollers' Il); `The. roller ll is geared to its cooperating: roller l0 by suitable gear wheels I6, is common ini. the casefof pairs of feed rollers. The shaftlz.' is continuously driven, while the machine is operation, from a motor I1 mounted onathe same elevated support |8 that carries the Each head' is turned upside down motor 5, through a sprocket chain I 9 or other suitable means.

Behind and aligned with the bed or table 9 is another bed or .table 2D provided with a series of feed rollers 2| similar to and parallel with the rollers Ill. The feed rollers 2l, as shown in Figs. 5 and 8, are driven from a shaft 22 similar to the shaft I2, arranged in a housing 24 at the side of the bed or table 20 through suitable gear drives 25 similar to the gears I5. The shaft 22 is driven from the motor I1 through a second sprocket chain 26.

As appears in Figs.A 1, 2 and 3, four little housings 21 are arranged radially on the exterior of the cage 2 at the longitudinal center and near the rear end of each of the four work-receiving compartments. In each housing is a plunger 28 acted upon by a compression spring 29 that tends constantly to force the inner end of the plunger into the interior of the cage, namely into the interior of the corresponding work-receiving compartment: The outer vend of each plunger extends through the outer end of its housing and is there interlocked with a rocker arm 30 pivotally mounted on a suitable bracket 3| projecting from the little housing for oscillation about an .axis parallel with the axis of rotation of the cage. On the free end of the rocker arm is an adjustable pin 32 extending through the arm in a plane at right angles to the axis of rotation of the cage.

In the bottom of the main casing I, in about the plane of the four stop devices, is a little frame 34 held in place by spaced brackets 35 so as to be slidable in the direction of the length of the cage. On this frame is a cam-shaped cross bar 36 which, when the frame is in its forward position, as shown in Fig. 4, lie's in the plane of the four pins or screws 32 on the stop devices. The parts are so proportioned that when the cam is in the position shown in Fig. 4, each screw 32 engages with the upper edge thereof, 'as indicated in Fig. 2, as the corresponding work-receiving compartment is very nearly in its work-receiving and work-discharging position, and causes the corresponding rocker arm to be rocked in the direction to withdraw the plunger with which it is connected from the work-receiving compartment. Then, while the cage remains stationary, the path behind the lowermost cylinder head is clear and this head may be pushed out through the rear of the casing, as heretofore explained, by the pressure of another cylinder head which is being moved into the same compartment from the front end of the casing.'

It will be seen that the little frame 34 has a limited lengthwise movement, being shown at one end of such movement in-Fig. 4 and being adapted to be shifted toward the right a distance somewhat greater than the thickness of the cam bar or shoe 3B. When so shifted toward the right to the other limit of its movement, it no longer has any inuence on the stop device, the retraction of which it had previously brought about, and the spring associated with that device immediately carries the plunger into its working position unless there be a cylinder head resting on top of the plunger. There is near the rear end of the first conveyor device, comprising the feed rollers I and II, a transversel rock shaft 31 having an upwardly projecting radial arm 38 which is connected to the rear end of the little frame 34 by a rod 39. Another arm 40 extends upwardly and rearwardly from the rock shaft to a point behind and above the rearmost roller I0, the

upper end of thisarm being provided with an anti-friction device 4I. When the leading end of a cylinder head contacts the anti-friction device on the upper end of the arm 40, it causes the rock shaft 31 to turn in the direction to draw the frame 34 toward the right, as viewed in Fig. 4. Consequently, by carrying each cylinder head away quickly, after it once becomes engaged with the first conveyor device, the stop device remains locked in its idle position until after the retreating cylinder head is beyond the same and then the cam-carrying frame is quickly shifted so as to cause the stop to be in its working position before the incoming head reaches it. Then, after the discharged head leaves the rst set `of feed rollers, a spring 42, acting on the connecting rod 39, causes the frame 34 to be returned to its working position. In the meantime, the cage has again started a turning movement, carrying the stop device behind the newly inserted cylinder head away from the cam; so that all of the stops remain in their working positions until the cage again completes a quarter turn and brings another head into discharge position.

As a cylinder head moves beyond the first group of feed rollers, it enters upon the second group 2l between a guide 44 extending throughout the length of the group of rollers at one side of the apparatus and a short guide block 43 at the forward end of the group of rollers; the head travelling along until it strikes a fixed stop 45, which is gest shown in Fig. 5. When the head reaches this stop, it is picked up and placed on edge to drain any remaining Water therefrom and to subject it to strong jets or blasts of air for completely drying the same.

The drying apparatus comprises a thick rectangular plate 46 extending throughout the entire length of the second feeding unit and supported on edge at a considerable distance above the rollers 2I by suitable uprights 41 rising from the bed or table 20 on the side opposite that at which the long guide bar 44 is located. This plate is provided with numerous little nozzles or jetting devices 48 on the inner side; these being so disposed as to register with various holes that have been drilled into the head, and other openings in what is the under side of the head as positioned on the engine cylinder. There is also a series of aligned tubes 49, closed at the ends, arranged on the inner side of the plate along the upper edge; these'elements being connected to the upper part of the hollow plate by means of tubular stems 5U through which hot air may be delivered from the interior of the hollow plate into the tubular members.' Drying air is delivered into the outer or rear side of the hollow plate through a large pipe 5I containing a main valve 52.

The cylinder head is lifted from the feed rollers 2I and swung up against the member 46 by means of a pair of arms 54 xed in spaced relation to each other to a shaft 55 mounted on top of the gear housing 24. In Fig. 8 this shaft is shown in such angular position that the arms 54 lie just below the plane of the tops of the lrollers 2l. The base ends of the arms 54 are L-shaped, so that one leg of each extends upwardly when the arms are horizontal, while the other legs extend horizontally to meet and embrace the supporting shaft 55. Thus, the long straight portion"I of each of the arms 54 has near the inner or base end a shoulder 56 that is vertical at the time the arm 2,'3v24f6'68 lieshorizontal. .Fortthisreasonpafterra cylinder i head hasfcome to :rest'nagain'st the.'stop45.,the

turning `of ltheshaft 55 in theclockwise direction, f

cylinder heads. For ithis reason, the cylinder head :being in `contact with :the fguide 44 at 'the time Iit is lifted up by .the arms,` the head will slide #downwardly along the arms until itsstrikes `the shoulders-56.` Then, when the :arms aar-e again swung down, `the cylinder head` willrema'in-in engagement with these `shouldersandthus Ibe spaced 'afsubstantial distance` away `from Atheguide `44. vThese two `conditions are illustrated-,fin Figs. 6 and 7, Fign' showing a :cylinder head rengaged with the stop 41.5i while .still in ,contact with ilthe guide along which it travelledA to reach the stop, whereas in Fig. '1 the cylinder head is shown spaced apart from theguide 44 after having `been lowered from an upright position. This lateral shifting of lthe lcylinder head is .utilized to icontrol `the operation of the swinging support, the discharge of the drying air, and thenal removal of the cylinder head from the secondugroup or `battery lof feed `rollers 2l Without being finterfered with by the stop 45. i i i The shaft 55 has `a radial arm 51` xedthereto.

A connecting ,rodi 58 extends `from the :free end of this arm to the'upper end` of acomparatively long lever 59 which stands' almost vertical toutwardly beyond the gear box 24 and is pivoteddat its lower end, as indicated at :60,to a stationary part 6| of the bed or table 2.0. IBetween the-lever 59 andthegear box 24 is a shaft L62 that ispar.- allel `with the vshaft 55. Fixed tothe shaft 162 iis a lcam 64m the form of -aldisk havinginthe edge thereof a valley 65 which constitutes thelow point on the cam. The lever 59 is provided'aboutlmid- Way between `its ends with a'cam `roller 66 that is adapted 'to ride on theperipheryof the cam disk.; the Aparts being so proportionedthat when the cam roller is at the bottom `of `the Valley,` the lifting arms 54 are down,..as shown vin full ilines in Fig. 8, whereas, as soon as the vcam rollerbevgins to turn and thereby .cause the rollerto `ride upvout of the valley, the arms 154 begin `totswng up. Finally, when the Ilearn roller :reaches the unmutilated portion of the edge ioftliedisk, the

.arms 54 :stand uprght, as -shownin dottedlines in Fig. '8, and the vcylinder .head fis` held thereby in proper registration with thejetting devices on the hollow plate 46. After the cam has completed the greater part of arevolution, the cam 'roller again runs downhill and into the `valley so as to restore the parts to the positions illustrated in full lines in Fig. `8. Thus,v a single revolution of the shaft62 causes acycle of operationgof the head-lifting arms to be comp1eted. Since the 4unmutilated portion or thecam edge" is of muchl greater angular length thanisthe valleyy portion, each 'cylinder head is heldinthe upright position 'during asubstantial interval of time and, by admitting `heated airiinto the hollow member 46 during that period, the head is effectivelydried.

The shaft 62 operates only intermittentlyun- `der the control vof the cylinder heads themselves. In the arrangement shown,` the'shaft \22that drives the feed roller-s `2I extends `'beyond (the end of Athe -gear housing 24 andinto asmallertr'ansbins-r shaft ss richest shown in rig. si.; The tubular shaft sasurrounds the .sh'artr-BZ and isvcom stantly driven; whereas the `shaft .'62 turns :only

when it Ais `clutched to the shaft 268. ,The .shaft 68 is muchshorter than is the shaft 1621sovas to provide-room for the clutch 'member 11| `lred to the shaft 62 between the movable clutch 4mem`- ber BS mounted on the free end .of the` shaft 16B, and the stationary bearing `11U Vfor the projecting end fof the .shaft 162. Whenever the `clutch is .thrown in, the shaft 62 lis caused to rotate. l

. The immediate factuatorifor'lthe .movable clutch inemberi69 is a lever. 14 in the Vform of an linverte'd U embracing 'the `member l69 .and pi'votally connected iat .its Alower end to l'the stationary fsupport orplatform 61 ,for oscillationab'out anaxis at rightangles to Vthe yshaft .62. This .lever ris in turn-operated by `iti-:transverse sha'ft 15 extending underneaththe battery of rollers" 2 l fclose to the discharge end of the latter, namely-close to thefxed stop 45. Thisshaft has on theend thereof adjacent to the clutch actuator 14 a. rigid radial arm 1`5 iextending in the `upward direction.

A `rod 11 is hinged `at its lower `end to 1the upper end ofthe arm 16 rand :extends slidably Athrough an "ear 18 fiixed` tothe upper end of'the lever 14. f

Surrounding the `rod 11,'be'tween the Sear 1B `anda shoulder `"I9 on thelower 'end of 'the rod, is 1a coiled compression spring 80. .The parts 'are so proportioned that the arm 16 :and the Arod 11 act as' a` toggle *that may fbreak 'in Aeither direction and one `member `of which is resilient `in the lengthwise direction.` In other words, whenthe rod and the :center line of the farm -16 make obtuse angle whilelying `on onelside of as'trai-ghi linepassing through fthe middle ofthe rear 'L8/and `the axis of the shaft 15, as shown in 1""ig.` `10, the

'clutch `ishe'ld open. Then, if the shaft is turned in the clockwise direction, as viewedin Fig.`j10, until the hingeaxisbetween the'rod andfthearrn 16 pass'to the `other side of the-aforesaid line or center, the spring f80j-is` rst placed under igreater compression, and *is then permitted tovexpandby forcing 'the clutchfactuator 14 into the clutch closing position illustrated iin Fig: l-l.- 'Thaopem ing and the closing of the clutch lmay'therefore be brought-,about by simply #oscillating the s'harft l 15 through a lsnriallangle, Afirst 'inaoneidirectio In `order to provide Lmeans for :oscillating the shaft `15, it has lthereontwo fcunvewfingersill Vand 432, `spaced apart `from 'ieachotherlengthwise of the Vshaft and` so `shaped that upon ibeing :viewed 1from one end of fthe shatt, :they present :some-.- what the appearance `of :a horseshoe. These lingers are so shaped and ffso disposed that @the `finger 8| projectsabove Lthe top .of'the rldllersll in the path of an oncoming fcylinder head .to tbe verse gear `housing 61 lfrom whichzprotrudesaztu- 76 dried, when the clutch :is iopzem whereasathe finger 8-2 projects `above the topsrofxtheserrollers when the clutch is closed. In arder Ito .provide` room for the swinging-movements ofthese fingers, l

the body portions ofthe two :endmos't:feed; rollers 210, 2| I- are Acut away, as sbestshown in Fig. -5. The `end` of the Abody portion of `the ,third ffeed roller from the end,fnamely theroller 212, isA also cutaway atthat endfo'f .theroller farthest from the guide 44. The ngerxBZ is spacediarfenougfh away from the guide 44 so Ias `to liefoutside of the path of the cylinder lhead'moving along the-guide 44 into position to .be picked up by `the armsil, whereas the finger `8l `is :spaced `apart :from the vertical `lplane of the :two shouldersfion rtheiarms 54, whenthese arms are down, more ,than the width cfa-cylinder head. 1 r

The result of the construction just described is that when a cylinder head is fed along toward the stop 45, in contact with the guide 44, it strikes the fingerl 8| which, because the clutch is open, as shown in Fig. 5, now projects up into the path of the head and, before being brought toA rest through engagement with the stop 45, as shown in Fig. 6, turns the clutch-operating shaft 15 suiciently to cause the clutch to be closed. As soon as this happens, the lifter begins to swing up and places the head in position for its hot air treatment. After the shaft 62 has completed a revolution, the cam roller drops into the valley on the cam and, the weight of the arms 54 and the cylinder head being ofi center, the arms with the cylinder head thereon swing down from the dotted line position of Fig. 8 to the full line position. This condition is illustrated in Fig. 7 from which it will be seen that the cylinder head lies inwardly from and clear of the nger 8|, but overlies the nger 82; the result being that through pressing down the nger 82 on the shaft 15 has been brought to the starting position illustrated in Fig. 5 and the clutch has been caused to open. In other words, the cylinder head can now move onward beyond the discharge end of the battery of rollers 2| to another conveyor, not shown. adapted to carry the heads away for storage or assembly purposes. This iinal discharging movement of a cylinder head is accomplished without interference on the part of the finger 8| which, at this time, lies at one side of the path of travel of the head. However, as soon as the cylinder head reaches the position shown in Fig. 7, the apparatus is ready to receive the next head which may then engage the finger 8| and cause the shaft 15 to turn in the direction of the arrow in Fig. 6 before the head comes to rest against' the stop 45.

The main Valve 52 for the delivery of air for drying the heads is controlled by a pilot valve 84 in the same way that the deliveryof washing liquidsto the washing station is controlled. This feature is shown in detail in Fig. 9. In Fig. 9 the hot air enters the righthand end of the casing of the main valve and, when the movable member 85 of the pilot valve is in the position illustrated, air may ow from the interior of the righthand side of the main valve casing through pipe 86, through the casing of the pilot valve, and back through pipe 81 to a point above the piston valve 88 inthe main valve device; whereby the pressure of the air assists a compression spring 89 behind the piston valve in holding the latter closed. When the movable pilot valve member 85 is pushed inwardly, namely toward the right in Fig. 9, communication between the pipes 86 and 81 is interrupted and the pipe 81 is placed in communication with a small port 98 leading to atmosphere. Therefore. in the latter position of the movable member of the pilot valve device, the air pressure behind the main piston valve is vented to atmosphere, so that only the spring is left to hold this valve closed. However, the hot air in the inlet side of the casing of the main valve is constantly acting on a por.- tion of the periphery of the piston valve in a direction to open the valve so that, when the hot air is at a sufficiently high pressure to perform a drying operation successfully, it applies a sufficient pressure to the piston valve to overcome the resistance of the spring and thereby force the valve open. Even when the movable mem ber of the pilot valve has been pressed inwardly to bring about the openingof the main valve,

there is pressure behind the movable pilot valve member so that the parts of the pilot valve constantly tend to maintain the relative positions which they occupy in Fig. 9.

As is customary, the movable member 85 of the pilot valve is provided with a stem 9| which projects outwardly a short distance beyond the valve casing. What may be termed the opening of the pilt valve may be effected by pushing this stem back into the valve casing. This is accomplished by means of a radial arm 92 fixed to the hinge shaft 55 and having in the outer end an adjustable pin or plug 93. The parts are so proportioned that when the swinging device for raising and lowering a cylinder head is down, as

. shown in full lines in Fig. 8, the pin or plug 93 (ill is remote from the end of the valve stem 9|, so that the main valve remains closed. When the head-lifting member is swung up into the dotted line position of Fig. 8, the part 93 strikes against the end of the stem of the pilot valve and presses the latter back into the position that causes the main valve to open. By this means, as the cylinder approaches its upright, on-edge position, it is subjected to numerous blasts or jets directed downwardly and toward the exposed face or side of the head, from the sleeve-like or tubular jetting devices 49. This continues during the larger part of a revolution of the earn 84 and, when the cylinder head drops back toward the horizontal position, the external pressure on the stem of the pilot valve ceases and the supply of air is immediately shutl off and will not start again until the next head is brought into position for drying.

It will thus be seen that cylinder heads may be Washed, one at a time; then be carried away, drained and dried; and then be finally discharged: without requiring the workman or operator to do more than has heretofore been necessary to introduce the heads into a washing apparatus. Not only is there a great saving of labor but, by providing separate washing and drying stations, twice as many heads can be washed and dried in a given time as would be the case if both operations took place successively in the same station. Furthermore, this arrangement permits complete drying of heads which could not otherwise be properly dried in the apparatus that washes them, without reducing the number of heads that can be passed through the apparatus in a given time. It will also be seen that the mechanisms at the drying station, including the devices for causing drying air to be discharged, operate only when there is a cylinder head adjacent to the drying station, so that there is no waste of power or drying air.

We have referred to the work to be treated as consisting of cylinder heads and have illustrated an apparatus and mechanism especially adapted for the washing and drying of such heads. Other things, however, adapted to be treated in accordance with the principles on which the aforesaid apparatus and mechanisms are based, may be handled in the same way. Therefore, when we refer to cylinder heads, we mean any objects susceptible of a corresponding treatment.y

While we have illustrated and described with particularity only a single preferred form of our invention, we do not desire to be limited to the exactstructural details thus illustrated and described; but intend to cover all forms and arrangements which come within the definitions of our invention constituting the appended claims.

. medium against a head disposed therein; a device for lifting a head from the conveyor, delivering it to the drying station, and actuating said means to discharge the drying medium as aforesaid; and means controlled by each head reaching the vicinity of the drying station to actuate said device,

2. A drying apparatus for cylinder heads, a conveyor for receiving fiat-lying washed heads, a drying4 station beside the conveyor having means to discharge a hot gaseous medium against a head disposed therein; a device for lifting-a head from the conveyor, delivering it to the drying station in an on-edge condition, and actuating said means to discharge the drying medium as aforesaid; and means controlled by each head reaching the vicinity of the drying station to actuate said device.

3. A drying apparatus for cylinder heads, a conveyor for receiving flat-lying washed heads, a drying station beside the conveyor having means to discharge a hot gaseous medium against a head l disposed therein; a device for lifting a head from a Iixed stop near the other side of the conveyor to arrest the` movement of each head when it is opposite the drying station; a device to lift each head from the conveyor, stand it on edge in the drying station and again deliver it tothe conveyor inwardly from said stop so that it clears the stop when carried along by the conveyor; and means controlled by each head reaching the said stop to actuar said device.

5. A drying apparatus for cylinder heads including a conveyor composed of horizontal parallel transverse rollers rotatableabout stationary axes, a drying station besidethe conveyor, a vertical hot plate in said station, a hinged lifting device' provided with arms adapted to extend between certain of the rollers in one position ofthe device and to swing upward to lift an overlying head and set it on edge parallel to and in front of and near said plate, means to drive the rollers and means to swing the lifting device up and down.

6. A drying apparatus for cylinder heads including a conveyor composed of horizontal paralle1 transverse rollers rotatable about stationary axes, a drying station beside the conveyor, a lifting device including arms adapted to extend between and lie below the tops of certain of the rollers, means supporting the lifting device to enable it to swing up to carryan overlying nat-lying head into the station and turn it through an angle of ninety degrees and set it on edge, means to swing the lifting device up and down, andmeans to blow a gaseous material against each head while in the station.

7. A drying apparatus for cylinder heads including a conveyor. composed of horizonta1 parallel transverse rollers rotatable about stationary axes, a drying station besidethe conveyor, means at the station to dry heads entering the same, a stop above the conveyor on the opposite side from that at which the drying station is located, a lifting device at said station mounted to swing about an axis beside the conveyor and at right angles to the axes of the rollers; said lifting device having arms .adapted to lie horizontally between certain of the rollers underneath a head engaged with said stop, in the lowered position of the lift ing device, and to lift such head and set it on edge in the drying station, when swung up; the parts being so proportioned that the head slides along said arms toward the station during the upswing of the lifting device so as to remain clear of the said. stop when it is again lowered; and means to swing the lifting device up and down.

8. A drying apparatus for cylinder heads, comprising a roller conveyorwider than the heads for receiving flat-lying washed heads, a drying station at one side of the iconveyor, means to dry Y heads entering said station, a fixed stop above and near the other side of the conveyor to arrest the movement of each head when it is opposite the dryingstation, a shaft extending transversely of and underneath the conveyor near said stop, a finger projecting upwardly from one side of the shaft near said stop, a second finger projecting upwardly from the shaft at a distance from the stop 'greater than the width of a cylinder head, means to guide `a head so that it strikes the first finger and-turns the shaft in one direction but

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