US1918557A - Nut running apparatus - Google Patents

Description

5 Sheets-Sheet l F. B. FFEIFFERv 4 NUT RUNNING APPARATUS Filed DeC. 18, 1930 n Y INVENTOR fk5-n Bro w/v /Drf/ rfi@ ATTORNEYS July 18, 1933.

July 18, 1933. F. B. PFEIFFER l NUT RUNNING APPARATUS Filed Dec. 18, 1930 5 Sheets-Sheet 2 ATTORNEYS 'July18,1933. E B, PFEIFFER l1,918,557

NUT RUNNING APPARATUS Filed DeG. 18, 1930 5 Sheets-Sheet 3 I N V E N TO R /fa Bleah/v Pre fris/e BY l ATTORN EYS July 18, 1933. F. B PFEIFER 1,918,557

NUT RUNNING APPARATUS Filed Deo. 18, 1930 5 Sheets-Sheet. 4

2 23 /feuj' July 18, 1933- F. B. PFEIFFER 1,918,557

NUT RUNNING APPARATUS Filed Deo. 18, 1930 5 Sheets-Sheet 5 ATTORNEYS 'Y pneumatic rsi 3; and Figure; is a Patented July 1,8, 1933 v i nernsnown FEIFFER, or-AKRompHo, assrenon'ro CPPLES 'oo'mranyl yFAo'rneifns,`V or Louis, MrssoURr,A-JcoRroRATIoN*oF-Mrssoum" i Y j iJNiTED STATES-lf i i NUT RUNNING "ArPAnATns f Appneaumlmeavnecemberk18,1930. seriarNo. 503,202.

This invention relates to nut running apparatus, andfmorcespecially 1t relates `to mechanism for mounting bridge clips andVV nuts upon the valve stems of inner tubes tor against :the bridge clips at `the base' of the Valve stems. l l l j L The :chietobjects of the invention ,are to provide f apparatus for more quickly and economically mounting bridge clips and nuts on the valve stems of innerftubes; wto lighten `the manual labor involvedfgvlgand to' provide i certain automatic features tor expeditmg the operation of theapparat in l @t the accompanying drawings:

Figure l is a front eleyrtion ofapparatusv cn'ibodying. Vthe invention invv its preferred formg v *o 'y Figure 2 is a side elevation thereof and the Work therein g' *.iurif) 'rom-cern ici. i L L Tg e i flat 1;,o1f1largei scale, of `the work-engaging parts of the ap- V.iarafus in .vorl--receivin iositirai'y v l i.. i

' ure /lis a vertical section on line 4-4" ol Figure 3 and thelworlr therein; Figure 5 is Vwith the operative parte'shown in loading position t, prepara tony `to receiving the work Figure t3 is a sectioiron line 6 6 oi' Figure 11i-e5. y A .y

' Referring to the dr.fin/ings,rv l() hollow pedestal upon the top of which is mounted aj frame member `11 that carries on .its'front flaee a vertically reciprocable slide 12 retained thereon by plates 13', 13 overlying its lateral their` delivery orilices behindtherslide 12.

llhe chute 111 is positioned somewhat aboveA the chute 15 andis transversely"shaped so as substant'ally to conformY to the shape of thebridge clips ltklfothatthe latter are presented at the deliveryoriice in determinate position. The chutes 14, 15 are'disposed -hori-` Zontallyat their vdelivery ends, but otherwlse tires, and for setting up" the nuts' section"similar to :Figure -l section onl lineY-f of Figme Preferably inclined upwardly soV that the weightgofthe respective columns orn bridge clipsandwashers normally urges the lower ends ofj'saidcolumns towardrthe` delivery orilices `Vof the chutes. Preferably the chute lis open on-its upper side asfshown atlSrFigu'res 1 and, tozgivel access tothe` column of bridgeclips 16 for lstraighteninzc; them if theybecoine cocked or j'ammedin the chute. "Thechute 15V issimilarly provided A with a slot 19, Figur-e2, along oneside. 1

Journaled in suitable bearings20, 20-i11v the) frame .member f llyand` positioned be# tween the chutes 14,15 and inthe same Verti# cal plane, is a hollow shaftf2`lthatis provided with adrive pulley 22 mounted thereon[be-l v tween the bearings y 2() and 'c onneotedfby` 1a i transmissionbelt 23 with a pulley24n1outf ed uponthe shaft of a rnotorf'25.` y The-Inotorf mounted upon a bed p1ate'f26gthatf is pivotally vmounted at one side upon brackets such lasfthe bracket 27`formed' interiorly of V-the`pedestal 10 atanintermediate height@ thereim.V The othersi'de of thebed'plateis provided with a pivotally mountedLstemj`28` that extends' downwardly throughaniaper# .tui-ed lug 29--projecting `fromtheinner wall of 'the pedestal 10,4 therelbei'ngadj usting nuts 1 the-Stem 28 the lugv29, andV a compression'sprng lmou'nted upon the stem betweenthebed y plate and thelug.' =Tll1earrangennnrtipro vides Yconveniently for maintainingiproper s 30 threaded on the lower endk of below tension of the belt23, vit being desired toper-y mit slippage of `the belt Withreflation to the'- pulley- 22 'when' there is determinate resistanceto rotationof the shaft 21. An'foperat-l ing switch 25? in'thecircuit'supplyngelee` the front of the pedestal.

trical current to the motor 25 is'mo'unzttfsdfupronV y The from fend- Of the shaft 21 is fri'e with an enlarged heady21 which atitsrrear i bears against'the adjacent bearing-20 andhas its frontfface recessed 'to receive av socket f wrench 32 which is threaded thereinto, the wrench 32 Vbeing,formedwith anaxial aperi* ture of the Same v'diameter als' the internal recess in the hollow shaft 21. The frontoflthe i socket wrench S2-is forwardly taperedfais shown, andthe shaft flange 21a -andi'soeket T1091] Y l Wrench operate within a complementally shapedaperture formed in a guide plate 33 that is seated within a recess' formed 'in the front face of the frame member 11', the-front faces of' the members 11, y33 being flush sovthat theslide 12 Vmoves smoothly thereover.

VTherear end of theshaft 21 is threaded to i "receive'a' flanged collar Y34; that is set up against the, rear-bearing 20, and aplurality of vmetal; washers 35, v35 are loosely mounted upon-the shaft and secured-against the flange vof the, collar 34 .by loclr nuts 36, YV36. The

flanged collar 34 and washers'35 constitutea 1 moving washers 35.

vflywheel for the shaft 21, the mass of which may be varied asdesired'by adding or re-.

The slide 12'is formed althrough aperturek in which issecured-an apertured bushing 37, and somewhat above the latter a carrier plateY 38 is inset` in thefront faCeof the. slide, said carrier platebeing formed 'f wrench32 giving access thereto. When the slide12 is in its 'uppermost positiomthe bushing- 37 is infront of the socket wrench32V and the -aperture 39in the carrier plate 38 is aligned with the delivery end of the Vchute 14. v Set screws 40, 40 are threaded tl'irough 'the 'frame member 11 fromthe top and bottomathereof, 'and extend into the slideway of. the slide :12 fori accurately fixing the upper and lower limits of the'slids movement.

Mounted uponv the front face of the slide 12 is Vajleaf spring 41 that is secured to the slide at its lower end by screws42 or the like, and hasits upper end portion positioned Vin front;oftlie.apertured bushing 37. A spacer. f stud 43 'of the ysame thickness asthebushing 37 and of somewhat smaller diameter than the aperture in the latter is mounted upon "theinner face-vof the spring 41 infront of the bushing 37, being adapted, upon occasion, to Ventersaid aperture under thepforce of the spring 41. i A cap screw 44 is threaded into the bushing 3 7, the, headl of the screw overl lying theedge of the spring`41 andy serving as a stop vto limit'the .movement of the free A 'end' ofthe spring'outwardly from the slide tothe thicknessof one nut 17.

Formed on` the rear face of the slide 12, vbehind the carrier plate 38 and at each side of the aperture-39 therein',.are respective hori Yzontallydisposed ribs or'thickened regions 545,' 45 that 4are formed withv respective recesses 46,46 opening` onto their adjacent ends, the oppositeendofeach rib 45 being formed with-a through aperture l47 ofsmaller diameter than'the recess 46and constituting a1 continuation thereof. kPifvota'lly mounted` at 48, 48km the slide 12, .behind the carrier plate 38l Vand at opposite sides ofthe aperor detents 49,49, and'rods 50,' ..50 are pivotally connected to the respective elbows of the detents 49 andeXtend through the recesses 46 and apertures 47 of therespectiveribs45 p on the slide. Nuts 5l, 51 are mountedV upon f ture 39 therein, are respective L-shaped dogs i the .free ends of the rods 50 outside the'ribs 45,and respective compression springs 52 are mounted upon the rods 50 between the elbows. ofthe detents, 49 and the end walls i of the vribs 45,.:the arrangement being'such Y that one arm of each detent 49 isnormally yieldingly urged. to a position where it lwill -801 engageV a side ofthe lowermost bridge clip 17 in the chute 14 when the slide 12Vis in raised position, as is most clearly shown in Figure 7 For raising and lowering the slider12 both `manually operated and power operated 5 means are provided, either of which means may be'operated independently of the other.

The manually operated slide actuating meansv consistsl of la link` 53 which ispivotally con-` nected atits upper-end to a pin 54 that is mounted in a vbracket 55 formed on the rear ofthe slide 1 2 at'Y the lower margin thereof,y l

thelower end ofthe'link 53 beingjconnected to a rocker arm 56 mounted uponA a rock shaft 57 that isljournaled inthe pedestal 10 near .the base thereof. Ar `foot lever 58 is mounted upon the -roclr shaft 57 .and atension spring'V 59 is so connected to said foot v lever andpedestal as normally tol hold the,

'foot lever, and interconnected parts' including the slide 12,' in raised positiom'thearrangement being such thatthe operator iS required to hold the footlever indepressed' condition during the operation of ruiming anut on a valve stem. rlhe spring 59is disconnected when thepower operated slide actuating mechanism is used.l n

' Power means for reciprocating theslide 12 comprises av vertically positioned electric solenoid 6() mounted upon the pedestal 10 be# low the framemember 11, the'co're'61'of'the solenoid .being connected to one end jof lever 62 that kis pivoted near its middle at 63 o n theframe member 11 and has its other end portion formed with an end vslot 64 that` embraces the pin 54of the slide 12. i The end portion ofthe lever 62 nearest thesolenoid 6() is formed with agear sector 65 that is meshed with a pinion 66. mounted on the f shaft offa governor 67 'of known design, the 120 arrangement being such that the movements of thesolenoid core 61 are retardedand thev up and down movements of the slide 12 are. y

relatively slow instead of quick and violent.

Cyclic operationV ofthe slide 12 bythe solenoid 60 is effected automatically upon thefremoval of the work from the apparatus. `For accomplishing this result, al Vnormally open switch 68 is Amount-ed von the frame member 11 beside the slide 12',` said switch controlling a relay '(notshown) in the elec-"1 V30 noid. One member of the switch 68 is en'` gaged by abutton 69 of insulating materialV from the apparatus,the resulting angularv l() 50 outwardly against the pressure of the `springs 52, and closesv the normally open trical-circuit supplying current Vto the sole-` movement of the detents 49 pushes the rods switch 68 whereby the 'solenoid' 60 is ener.-

gized to, raise the slide 12. A normally closedk switchv 70 in the solenoid circuit is mounted on the framemember 11 above the` switch- 68 in vposition `tojbe engaged byy the return to its lowered position.

button 69 when the slideisin .raised position,v Y to open the switch anddeeenergize the'solenoidwhereby the' slide 1,2 ispermittedto In the 'operation of theapparatus, thel socket wrench 321is .constantly rotated by the motor ydriving through the'belt 23,1 pulley 22, and shaft 21. Assuming the other parts of the apparatus to `be in the positions shown inFiguresut'and 6, that is', with theV slide 12 in lowered position, a nut 17 mount ed -in the rotating socket wrench 32, and a bridge clip 16 supportedV by the carrier plate 38 in front ofthe socket wrench,the operator takes an inner tube 71 having avalve stem 72 projecting therefrom,v inserts the endl of the valve'stem through the aperture inthe bridge clip 16 and into engagement with the rotating nut 17 in the socket wrench, the nut thereby being threadedonto the valve stem;

as the latter 'is fed inwardly into the hollow interior of the shaft21. When the bridge clip finally abuts the tube structure atuthe base of the valve stem, andthenut 17 issetup tightlythereagainst by the momentumof theshaft 21 and its flywheel, the shaft 'ceases' to rotate andthe belt 23 slideskidly thereover.r

The torque imparted to thevalveistem 72 by the soeket'wrench when the nut 17 is set up against the bridge clip at thebase of the valve. stem is imparted to said bridge clip and ab-A sorbed by the carrier plate 38 which'so en` gages the bridge clip as to prevent angular movement thereof. Thus the operator is relieved of the heavy torsionaly jolt, incidental 4 to the stopping of the shaft 21. v

The operator then removes'the work from the apparatus, and in doing so u pulls the bridge clip, now mounted on the valve stem, past the detents 49rocking the same and causing such `movement of the rods 5,0 connected thereto as momentarily to Close the normally open switch 68 whereby thersolenoid is energized to raise the slide 12 to its 4upper position shown in Figure 5. It' will be observed, referring to Figure 4, that. when the slide 12 is in its lowered position the `weight of the nuts 17 in the chute'14 is sulii- 'cient to flex the leaf spring 41 to the limit des fined by the stop 411, lwherebythe lowermost nut in the'chute is moved into the `aperture in the bushing" in the-slide. -Thus when the sliderises toy itsupper position, the said nut is moved into axial alignment with theV socket wrench and the springpel, now 'relievedof the pressure of the columnofnu'ts, ejectsi the nut from the bushing aperture and positions it in the socketvof the socket wrench, the lat- Aif?, i

terrhaving resumed rotation' as soon asthe Y finished Vwork was withdrawn from-the apparatus. w i

In the raised position ofi the slide12,lthe

aperture -39 in the carrier plate 38 is posi` tioned in front of the Vdelivery end ofthe soY chute 14, and the weight of the column of bridge'clipsrtherein'moves the column sor thatA ther lowermos't bridge clip Y is moved forward -into Vsaid vaperture until stopped byyeng'agev-"l ment with the-detents) at eaoliside thereof u as is'fmost clearly shown in Figure -7 The positioning of the bridge clip as deseribedis, i

concurrent with the opening ofthe normally closed solenoid switch/70, whereby the solenoid is deenergized and the slide 12 permit# ted to-move, by gravity, to its lowermost position, `carryingwit-h it'xthe bridge-.clipin the aperture'39 of the carrier plate y38. The i slide comes'to rest with the bridge cliptherein positioned in frontV of the socket wrench 32,.whereupon the operations described may i berepeated. c u ,Y y

The apparatus setsrup thenuts to uniform tightness, and'its automaticfeatures`- make' for speedandV `economy in the operationthereof. The laborinvolved in operating the apparatus issuliciently light to permit the yemployment of i`emaleoperatives.l y

Thef'nvention may be modifiedfwithinthe scope of theappended claimswhichrare notVV limited. wholly to,l thewspecific' construction Shown and described." H Y i Vhatis claimed-isz 1. In apparatus 4of the character described, the combination ofa magazine containing nuts, a magazine containing bridge' clips, ai socketzwrench, and areciprocablel slide adapted first to remove anut from its vmagazine and to position it in determinate relation to the socket wrench, andthen-to perform a similar"operationY with a bridge clip.

Y a recombination asffieneain`ciaim1-in cluding means actuated byremoval of work `from` the apparatus for eration of the slide. i

3. In' apparatus of the-character described,

thel combination :of a" magazine containing.

nuts', a. socket wrench, areciprocable yslide formed with an aperture andmovable to reg; `ister said aperture 'in alterna-tionwith they delivery. end ofV he magazine `and with the socket wrench, and yielding means on said slide over the aperturetherein adapted to u effecting cyclrj, l'Op'.

be moved` a vdeterminate distance by the' Weight of tlienuts in the Vmagazine to per-V mit the loivermost nutin the magazine to enter the slide aperture,` said yielding means ejecting the nut from the aperture When the latter registers With the socket fwrencli.

4i; vApparatus as deiined in claim 3 in which the'yielding means -isa leaf spring,includ ing' a stop for limiting the .tleXure of the l spring. Y

5. -n apparatus of the character described,

f the combination of a gravity-*feed magazine containing bridge clips, a socket Wrench, a

reciprocable slide formed with Yan aperture vand movable to register said aperture in alternation with the delivery Vend of said-magazine and With the socket Wrench andto ife-` ceive a bridge clip from said iiiagazine,ltbe

apertui'e being so shaped asto prevent aiiguiar movement -of thejbridge clip therein,

and yielding'means in the Vslide aperture for holding afbridge clip therein 'against `the V Weight ofthose in the magazine. i

- Apparatus as deiined -inv Wl'iieh the yielding'ineans on' the slidev cony vsists oit a .pair ofV spring-pressed detents soV positioned as toengage opposite marginal poij'tionsof the bridge clip. Y

Wrench positionedbetWee-n Ysaid chutes7 and `reciprocable slide adapted inthe' iirst'phase ,oi vitsinoveineiit to remove a nut from the nut 'i magazine and mount itin the socketwreiich,

and inthe secondpliase of movement to re-V move Va. bridge iclip from the bridge clip chutev and position it in front of tb.esoc1 et Wrench. i f i Syri combinatioiias defined iii claim 7 including means foreilfecting*cyclic operation of the slide. fr 9. In apparatus of tlie character described, tlieombmation of respective magazines vcontaining bridge clips and nuts, a socket Wrench.

claim 5 in l 4 lie character described', the combination fot a ycliutecontaining nuts, Ya chiite-j containing bridge Clips, a socket a ireciprocable slide adapted to position'a bridgeclip and a nut Vjr'omsaid magazines in determinate relation to/said socketwrench,

and means actuated automatically by the removal of Work from the apparatus' for etfooting/cyclic `operation of the slide.

110; 'In apparatus 0in/ the character` Idescribed, the combination of respective magazines containing bridge clips and nuts,.a socket wrench, xa iecipi'ocable slide adapted to position a bridge clip and a nut from said fmagazinesin determinate relation to said socket Wrench, said slide comprising yield. ing means engaged by said bridge clip, andV electrical switches so positioned as to beV operatedgbysaid yielding means when Work is withdrawn trom'vtlie' apparatus forfeifecting cyclic operation 'of .the slide.-

y il.' In a means for V'applying nuts and "Madge-Washers to tlireadedvalve stems, a

' holding device providedWitli"asiipport for the nut aiidbridge Washer, means whereby one osaidholding devices is reciprocated to transfer the vnuts and bridge Washers from said supports to said-Wrench and-'seat7 and means whereby af-rotary motion is Viinpz'irted to said Wrench.

Vl?. In apparatusof` the character described, tlie combination ofV a magazine con- "taiiiing a siipplyofnuts, a magazine containiiiga supply of bridge clips; a socket Wrench, and a Vmember'for receiving-a nut and a bridge clip in succession from their respec.- l tive magazines and positioningythem in determinate relation toeach other and to the ysocket Wrench, and means carried by `said member for moving. the nut' therefrom into FRED BROWN'PFEIFFER.

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