US943272A

US943272A - Electric tempering-furnace.

Info

Publication number: US943272A
Application number: US43241508A
Authority: US
Inventors: Vernon Royle; Vernon E Royle
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-05-12
Filing date: 1908-05-12
Publication date: 1909-12-14
Anticipated expiration: 1926-12-14

Description

V. & v. E. RUYLE. ELECTRIC TEMPERING PURNACE. APPLICATION FILED MAY 12, 1908.

Patented Dec. 14, 1909. A

3 SHEETS-SHEET l.

V. & V. E. ROYLE.` A ELECTRIC TEMPERING FURNAGB.

APPLICATION FILED MAY 12, V1908.

943,272; Patented 1 e0.14,19o9.

3 SHEETS-SHEET 2 V. L V. E. ROYLE.V ELECTRIC TEMPBRING PURNACE.

APrLwAToN FILED MAY 12, 190s.

943,272, Patented Dec. 14', 1909. 3 SHEETS-SHEET s.

T6 y ff L 3 76 Wzn essex elevationv partly in section. Fig. 2 is an en-l ductors ai'e\i onnected with the walls of the section. the sectionbeing taken on the line .C-fC of Fig. 5. Fig.. T is a partial eleration on the oppositefside.

.P19i, ei". 4 yLl-.Shaped m crosslsection; the Space between.

U'Nlgdm` STAEES iigrENT OFFICE. r.

' VENNON'ROYLE AND VERNON E. ROYLE, 0F PATERSON, NEW JERSEY' ELECTRIC TEv'PERING-FURNACE.

specifi-ation of j j Appncatiqafnedmay12,1908. serial No'. 432,415. u

Letters Patent.

Patented Der. He, 1909.

To (all whom it may concern: lle it known thatwe.. Ynnxox lloYLiand Yicaxori IC.; loijmc. citizens` of the llnited States. and residents of Paterson` in the county of Passai and State of New Jersey. ha\'e.inyented. a new and useful Electric Tempering-Furnace. of which the following a specifi-ation- 1- l e This inyention relates to a tempering furnace and more particularly to a tempering furnace4 commonly known as an electric fusible salt furnace. the object being to pro .yide effet-tire meansI for handling` tools and regulating their submission to the action of the fusible salt with great accuracy and. atv the sametiine. proyiding for the automatic stoppingrof theaction of the tool carrier when froni` any aus-e a- ,tool becomes jammed.` f

practical )embodiment of our invention isV repri-sent-ed inV the accompanying` drawings. `in vwhich-- Figure 1"is a View of the furnace in Side lazrgedyiew in detaii'showing a partial section at the point where the electric consalt retainingWessel for fusing the same.` Fig. 3; is a partialtop plan View on an enlarged scale partly broken away. Fig. Jf is a yiewof the samein side elevation partly in A-'A of Figiy Fig.\ 5 iS a transverse section in the plane of the line B-l of Fig. t3.Y showing the motor. and the operating'mechanisjm connected therewith in top pian. Fig. (3 isa yerti al section in the plane of the line at the Aleftdhand `.side as the drawing is held in reading. and Fig, S is a partial elevation The ffurnace ie; conyeniently supported upon a hollow pillar1 haring a laterally extended Vbase 2. f

j The furnace caSing is annular inf form andconvenientlyU-shaped in crof-:s section. the.. annular U-sliaped'casing denoted by :v3

Tito the'flan'ged vtop of the pillar 1'.

'ivitliinand spaced therefrom the furnace ich annular' in` vform and ,ariplanc and'carrieswith theA furnace and casing being filled with an insulating noneiieatfcouducting material f).-

for instance`r asbestos Y The furnace wall a is supported from the casing 3 by means of lugs '10 depending from the bottom of the furnace which rest upoir a non--heaticonducting insulating washer 11. a fastening bolt 12 extending through the washer 11 into the lug 10. The

furnace is further provided on the upper Side of its bottom with a smooth faced track 12? along which the tool carriers :slidens wil'l lthe furnace spaced from each other and from the furnace walls and held inposition by means of suitable bridge piecesl 1t'. 1T.V

made fast to the ca'fsingvl 3. These bridge pieces lt, 1i'. are insulated from'thecasing b by means of inulating.washers 1S which lSurround the f electrically connected with the plates Hand 15 by. means of screws 20.21,--which` fasten them to the bridge pieces.

The space between the

annular plates

11 and 15 is sutliciei'it'lo permit the tool holder to travel around freely between them.'

The electric cmhrentv is brought into contact with the salts in the furnaceihy connei-tingI one conductord'l, for instance thipositiye. with the furnace wall. and the negative conductor i?) with the bridge pieces' lt. 1T. rby meansl ot' a -branch conductor 'll which passes from the bridge piece lt through the insulating material t) to the bridge piece 1T.

The conductors 22. 23. may lead from binding posts QG. ixediu the web 4.- or flange-( in proximity to the top of the pillar 1 to which the current maj' be transmitted by suitable line wire 27. 2S.

A table 2&1 mounted byfmeans of a central hub oii'the hub 5 and ie keyed to the shaft 31 which extendsdownwardly within astening;,screwsv 1S) but arc` the pillar 1 ,\'l)e're=it is "connected up to aI which will be hereinafter lparticularly de. scribed. r1`he table 2t) rotates 1n a lhorizon-l it the tool holders v cal slots 33 for the purpose ot' exposing the j -in such numbers as may be desired, twenty cient size to receive a tool therein with a free sliding movement, the'lower ends of the tubes being provided with a series of vertiltool therein to the fused salts when the tool holder with tool therein is lowered into the bath of fused salts in the furnace. It is intended that the several tool holders shall, when in operation in the salt'- bath in the furnace, rest on and slide along the smooth track 13 at the bottom of the furnace and when it is desired to withdraw them from the bath within. the furnace they are caused to ride`-up` an incline 34 and to permit the tool therein to drop into a receiving tube 35 which' is supplied with a cooling bath in any well known or approved form not vshown herein, the coolingl bath being kept at a certain height within the' tube 35 by permitting l it to overiiow through openings 3G in the tube 35 into a basin 3T from the bottom of which it is returned by means ot a pipe 3S.

As the tool holderv 32 passes over the top of the receiving tube to deposit the tool therein, it would have a tendency to fall by gravity into the receivingtube 35 or into thel socket extension 39 of said tube if the holder were not positively supported at that point by other means than by the track 13 e along which it has been allowed to slide while carrying -the tool in the bath.

To temporarily supportthe tool holders as they pass over the receiving tube 35, arms 40 are provided, one for each tool holder, the arms being pivoted at their inner ends to suitable supports l1 near the center ot the table 29 and having their outer ends connected by means of a rocking joint with the tool holdersI This connection may be simply made by permitting the outer end ot the arm 4,0 to engage a slot 42 in the wall ot the holder.

Each of the arms 40 has depending therefrom a rod or pin 43 which extends down wardly through an elongated bearing -lfl in the table and which, just as the tool holder is about to pass over the top ot the receiver, rides up an incline 45 on the web et and positively holds the arm 40 and tool holder suspended during the short interval while it asses over the receiver. After the tool older has passed the receiver, (see Fig. Ll) itxis allowed to travel down an incline 4G 'corresponding to the incline 3st and carries the tool which is placed therein just after the tool holder passes into the receiver 35 down into the bath for ten'ipering.

The supply of tools to be tempered may be conveniently deposited in a work reeejitacle 47 supported on the top of the shaft 31Mwzthin convenient'. reach of the operator and they may be taken' from the pan 47 and placed by the operator in the tool holders just as the\ latter pass the receiving-tube 35. l `or this 'purpose a hole 48 is formed in a table 49 under which the tool holders travel as they come up the incline 34, pass the receiving tube 35 and go down the incline 4G.

For the purpose of gaining access to the interior of'the furnace at frequent intervals throughout its length, the top of the furnace which is formed by the table 29, is provided intermediate of each two consecutive tool ca rriers with a trap door 50.-

To guide'the tool holders in their vertical reciprocating movement, the table 29 is provided with upwardly extending tubular bearings 5l in which the tool carriers slide, the wall of the tubular bearing 51 being provided with a. vertical slot 52 on the side toward the arm 40 for the purpose ot permitting the free end of the latter to move up and down with the tool'carrier.

The shaft 31 which extends down within the pillar is stepped in a toot, block 53 inserted through an opening in the side. of the pillarand made fast to the pillar and is provided with a bevel gear 5-1 near its foot, which gear intermeshes with a bevel gear .'35 on a horizontal shaft 5G mounted in a bearing 57 bolted to the side of the pillar.

A U-shaped supporting` table 5S rests upon a flange 59 projecting laterally from the pillar, the branches ot the U-shaped table being located on opposite sides of the pillar. This table 58 supports an electric motor in dicated at 60, the shaft 61 of the motor extending transversely to and 4above the shaft 5G and provided with a worm G2 which engages a worm wheel G3 located on a shaft (34 extending transversely to the motor shaft. and below it and supported in suitable bearings (35, G6 on the table 58.

The shaft G4 has mounted at or near one end thereon a crank wheel GT, the wristl pin (S8 of which isembraced -by a pair of expansible .jaws 69, 70, on a pitman 't' 1.

The pitman 71 is connected with one arm 7'2 on a bell crank lever'fulcrun'led on the shaft 56 at or near its outer end, the other arm T3 of said bell 'crank lever carrying a gravit)v pawl 711 adapted .to engage a ratchet wheel T5 xed to rotate with the shaft 5G.

-The expansible jaws G9, 70, which embrace the wrist pin- GS are held in operative adjustment with respect to the pin by a spring Tt, the tension of the spring being sufficient to hold the jaws in' operative relation to the wrist pin when the strain upon the crank wheel normal but when the strain is abnormal,- due to any unusual hindrance in the rotation of the verticlfshat't 31, the jaws (i9 and TO will spread permitting the wrist pin to escape from its seat and it will work idly between the jaws alternately passing out. of and into its seat until the abnormal strain upon the vertical shaft 31 is removed. This will eectually prevent damage to the. gear of the -tol carriers.

Th'e paxvl 74v ispern'ntted to -engage the from anv unintentional wedging or jamming ratchet wheel 75 on'lV at intervals, the time between suclrintervals being determined by the rate of rotation of a shield 7 7-Which sur rou'nds'the ratchet wheel and prevents. the

tool from. coniingin vengagement, with "the 10 teeth `of thef ratchet wheel save only Where the shield' 77 is 'cut away as at'78. to permit .the 'pawl to drop through temporarily lnto- 20 tegral therewith, a spur gear 80 b v which motion istransnntted to the shield v77 from t-heshaft 64 as follows z-A shaft 8l is suportedv in suitable bearings' 82, 83. on a ranch of the table 58 and on'the side of the y "'25 pillar 1 opposite that onwhich the shaft G4 is located, the shaft 8l carrying at or near Vone end a spur wheel 84 in mesh with the lvvheel 80 and at the opposite end a spur gear85. The shaft 64 has at or near its end. a pinion 86 andla shifting gear is interposed-between the pinion 8G and the spur. gear 85 to transmit a faster or slower motion to the gear 85 and hence to the shield '77 as may be desired,lv The shifting gear consists uffa larger spur ge'ar'f87 and a smaller spur gear' ,88, the two mounted on a common 'short shaft or aide 89 supported in a bracket 90 `fixed toan extension of' the bearing'G. yThe 'spur gear 87 is ina position to inter- 49 mesh with the pinion 86 and the spur gear t88 ina position to intermesh 'with the spur 'r85. 'The' bracket 90 is in the form of an arm 'and has' one end engaged with the extension on Ithe bearing split and provided with a bolt 91 to clamp it to or release it from the v'bearing 65 While the body4 of the arm bracket 90 is provided 'withan elongated slot 92 Ain which the shaft or axle89 is clamped so 5 0 that the wheels `carried bythe shaft or `axle 89 may be moved bodil)7 toward `rand away vfrom the center of the shaft 64,'co`ncentric vwith whichthe 4arm 90 is fixed. For instance, ifa Wheel smaller than'the Wheel 87 55 were to be puttin its place and a Wheel eater than the Wheel 88 were to be put in its place, the

wheels

87 and 88 would be removed and when the others were placed in (position, the shaft 89 would be adjusted' along the slot 9'2 until the wheel which took the'place ofthe wheel 89 intermtv shed with the pinion 86 and the shaft 89 then secured in the slot and the lbracket arm would then be,swung on 1ts support to bring the wheel 65. which ivas substituted for `the wheel' 88 into engagement with the spurjwheel 85 hold the parts in assembled adjustment. B v thus-shifting

thegenr

87, 88,--and replacing it )Vith other gear, a faster or slower motion may be imparted tofthe shield 7T while the motor shaft 62 'and .the shaft '64 driven thereby maintains a constant rate of speed the ratchet wheel 7 5 at more or less frequent intervals 'and' hence imparting a step bv step movement of thev'ertical shaft 31 which carries the toolholdersal'ong' within the furnace at a more rapid or less rapid rate as m'ay be desired to produce 'the .most advantageous hardeningjeffect upon the tools.

The operation of' therseveral parts has been so particularly.dscribedin connection with the foregoing lexplanation. that a dc- -.ta'ilcddescription of the operation is deemed unnecessary. In neral, the operation is as follows The too s are ltakenfby the operator from the tray, or pan 47'and placed in the tool holders A32 asthe tool holders pass under the opening 48 and the gear having been set to keepthe tools incontactl with the fusible salts within the furnace the desired length of time, the -will becarried around within the furnace y the 4travel of the tool.

holders along the rim until they are' one after another dropped into the receiver conduitl 35 just before the tool holder reaches a position below the opening 48 to receive another tool. In .order that the movement o f the vtool holder over the mouth of the receiver conduit may be sutliciently slow to afford the tool time to drop free from the. tool holder into the receiver conduit under the' influence of gravity, the stroke of the crank wheel 67. is so timed that the more rapid part lof said stroke and its action upon the pawl 7 4 will takel place just before the receiver lreaches the opening 39 while the slower partof the stroke will take place-whilerthe toolholder is passing over the conduit. l

It is obvious that changes might be resorted. to in the form and arrangement of the several part-s Without departing from -the spirit and scope ofl our invention; hence we do not wish to limit ourselves strictly to l'the structure 'herein shown and described, but

What We claim is 1.` An electric tempering furnace comprisingI an endless receptacle for fusible salts,

means for applying an electric currentthereto and means for automatically passing tools one after another into and out. of the 'receptaclej vy l 2. An electric tempering furnace comprising an annular receptacle for fusible salts, means for applying an electric current` thereto and means for automatically passing tools one after another along wlthinthe receptacle and out ofthe receptacle.

and then the bolt 91 would be tightened to 3. An electric tempering furnace comprising an annular receptacle for fusible salts,

means for applying; any;.electricv current thereto, the .said receptacle being provided with acentral track along the .bottonr thereof, tool holders arrangedto travel along the track and.v means Ifor operating the tool holders.

l. An electric tempering furnace comprisv ing an annular receptacle for fusible salts, means for applying an electric current thereto, tool holders arranged to travel con-4 secutively along the bottom of said'receptarle, means for lifting. the tool holdersat the limit of. their traveland a receiver con.-y

duit through which theftolols pass fromthe tool holders.

An electric tempering furnace comprising an annularvreceptacle for fusible salts, the said receptacle being .provided with trap -doors for y gaining {..accesskto the interior thereof at frequent intervals, means for applying the electriecurre'nt tov the receptacle, open ended l tool holders arranged to travel along Within 'the receptaclen means forlifting` the tool holdersat tlie'ftermination of.

their travel and a receiver ',co'ndnit" 'through which the tools passjroinfthe tgpllholders.

6. An electric tempering furnace comprising an .annular receptacle 'for fusible salts,

means for applying-an electric current there.`

to, a rotating table forming a cover for the receptacle andprovided'with socket bearings, vertically reciprocating. tool holders located in. said socket. bearingsein position. to more ,vertically .into and out'of the salt receptacle, means. for rot-ating .the table,

means for lifting the tool holders at thel termination of their. travel and a" receiver conduit into which the toolspass `from the tool holders. y

7. An? electric tempering furnacecomprising an annularreceptacle for fusible salts, means for applying an electric current thereJ pass over the mouth of the said receiver conduit. f y y 8. 'An electric tempering furnacel comprising an' annular receptacle for receiving fusible salts,.1neans for applying an electric. current thereto, open ended tool holders arranged to'tra'vel Within thefurnace a re-v ceiver conduit over the mouth of lvvhlch the. tool holders pass, radial vertically vibrating arms having their free ends .engaged,1one

with each tool holder, andl camslarrangedto support the armsand hence the tool holders during the .passage of the tool holders over the mouth of the'receiver conduit.

9. Anelectric tempering furnace com rising an' annular receptacle'for receiving. usible salts, means for' appl ing the electric current thereto, open-,ende tool holders arranged to travel along within the receptacle, a receiver conduit and means for retarding .the advance movement of the tool holder asl it passes over the mouth-ofthe receiver conduit.

10. VThe combination with a receptacle for' receiving the tools to be tempered, tool carriers arrangedl to move along the receptaclega rotary shaft for operati 4the toolcarriers and means for'rot-ating t e shaft, of means for automaticallyl disconnecting the shaft from the driving'pover when the shaft preysents an abnorma resistance to 'the driving power.

11. An electric tempering furnace, comprising-.a-'n annular receptacle for .receiving fusible salts, means for applying the electric current thereto, a track spaced from and 1ocated along the bottom of the annular rece tacle for supporting the tools during t e tempering ,operation and means for enter,- ing tools along said track within the mass of fusible salts.I

In testimony, that we claim the foregoing als `our invention, We have signed our names 1n presence'of two lWitnesses, this 30th day of April, 1908.

VERNON RoYLE. vEBNoN E. RoYLE.

-Witnesses:

HEBER RorL'E, ARTHUR B'. HUNT.