US1468349A - Clutch - Google Patents

Description

sept 18, 1923.

H. D. GRINNELL.

CLUTCH Filed May 17I 1922 lll 'lll/lll HAROLD D. ennuient, or riTTSrriaLn, ifiASsAoiiUSnTTs, assitance To THE e. jo. A. MANUrAoTUaInG coi/irAnY, er riTTsrinLn, MASSACHUSETTS, A CORPORATION Or MA.ssAcifiUsnfivrs.' Y

'. i Application ined may i?,

of vPittsfield, in. t-he county of Berkshire' and State of Massachusetts, haveinvented an Improvement in Clutches, ofzwhichthe following description, in connection'wvith the accompanying' 'drayvings, is a specification, likecharacters on the-.drawings representing likeparts.- i r This invention vrelates to an improved clutch or chuck, the object thereof being to provide a frictional, selfnadjusting device of thisclass designed for application to bodies having a circularv or` curvilinear outline in cross section. While the invention is not restricted in its'application to `any particu i the same on the line 2-j2 of Fig, l;

lar art 0r arts end With obviousmodica-- tions m-ay beadapted to agreat variety of uses, as, for example, to lathes and drills, the particular embodiment herein shown is designed more particularly with reference Vto\ its applicationito electric lamp bulb installing and removing devices rwherein my invention is employed las anianuallyoperated clutch medium ifor `gripping the lamp bulb. Y y f -1 Referring to the accompanying drawings illustrating a preferred formof embodiment of my invention: i.

' F ig. lis aside elevation showing the device applied to an electric lamp bulb;

Fig. 2, a longitudinal vertical section of f Fig. '3, a cross-sectional top vievvv on line andi Y Y.' .1 -F`ig.4', a vievwsimilar to Fig. 3 illustrating my device as applied toa lamp bulb of irregular or elliptical outline. .lV

y invention comprises arecessed or holloW receptacle or barrel l, providing an interiorchamber 2 enclosed by substantially straight, smooth,.and uniformly `inc lined 'side Walls assuming the formation of an in vert-ed frustum round. in outline,the larger or receiving end -beingopen The chamber 2 is consequently gradually reduced in cross- .sectional area from top to bottom, the object thereof being to proportionately increase the grip or pressure of the Walls upon the engaged surface of-the object or Work; introduced therein as such .object or 'work advancesinward under pressure of the operator Vor other seatingforc'e.

e Y -maining constant.

the

. 'clesigned to be applied. These side Walls :ofthe receptacle lmare 'l CLUTCH.

designed to be flexible but ineXpansible and may .be Yformed of paper, pressed fibre or other material havingjtlie requisite properties as hereindisclosed, so as to conform to the outline ofthe foreign Objectfto the ex-v ftent of their fixed circumferential measure at any given elevation in their length, but Vnot'to stretch orleXpand. When, for eX# ample, the contour of the foreign object is irregularor elliptical in cross section, as illustrated in Fig. 4, the outline of the receptacle Vis modied by the introduction of suchV object to measurably conform thereto, being temporarily distorted from its true circular formation in the plane of contact' and adapted to resume its normal outline when the object is removed. This property of flexibility increases the extent of the actually engaged portion of the surface of the Work. ln a device of similar' formation Vhaving slotted side Walls or Walls constructed of rubber or other yielding or expansible .materiah the distortion Would result in localized stretching or stressing of its `Walls at the point or points of irregularity in the object, Whereas in the present device distortion 4at any given point involves distortion of the entire contour ofthe circumfer- Yence of the Walls in the plane affected and Where any increase of pressure .resulting therefrom is distributed evenly over all points in the circumference, the actual measurement of the circumference vhowever re- `While the receptacle l `of theinvention herein illustra-ted is provided With a smooth interior surface, it is obvious that the functional characteristics and objects ofthe structure described, may be retained in a receptacle'having afmodified interior surface, which may be corrugated or otherwise rougheiied for adaptation to particular classes of objects. It should also be pointed out that it is not in all instances necessarily essential to the operation Vof my device that the central longitudinal line ofthe object should 'be adjusted in true-alignment with the axis .of my device, but in practice the object may in frequent 4instances assume a `somewhat tilted or relatively inclined posilOO tion, as, foreXample, in the case of electric lamp bulbs, to Tivhich the present embodiment was particularly but not exclusively The receptacle l is mounted upon asuit- "eat capacity a able carrier 3, the form of which may b e modified to conform to the mandrel, shaft or other support to which it is attached. As herein shown, the carrier 3 is a circular transversely arranged member constructed of Wood or other suitable material closingY the inner or small end of the receptacle and provided centrally with a recess el, adapted to receive the nipple 5 of a lamp bulb 11, and `also provided at or near-its 'margin uiteen@ ,101* v1411er@ transverse :Openings 12,12,

which serve as air vents. Depending centrally from the carrierand preterablyinte- `gral therewith 'is a stem 13 ineased in a `metal bushing'll having tapering side Walls.

"The receptacle 1 may Vbe secured in any suitable manner to the carrier 3, the .means herein shown being aclanip G constructed of stiff Vhailing wire surrounding the receptacle at a point near its loiver end, the la ter being forced 'into a suitable annular groove provided on the surface of the carrier and forming a permanent seat "for .the aan,

in' present .embodiment my device is detacljiably mounted to rotate upon a turning erod or spindle 7 carrying fat its `outer end a `socket-meinber or false chuck 8 provided v vith an axial bore-to receive the spindie and removably secured ythereto Aby a set serew 9 extending through a suitable threaded opening provided in its side Wall and,

ders suliicient resistance to prevent dis placement ot the clutch or theirrela-tive ,movement during rotation, 'preter to pro- 'aucijli ry positive 'latch'i'ng means of a suitable and'convenient characten'sueh as a pressfbutton 15 mounted to slid-e in a tubulari casing 1 6 fitted into asuitable transverse recessor'o`peni11g in lthe side of the stein 13, said press-'button beingactuated normally Voutwardunder the pressure ot aneXpa-nsion' spring 17 and adapted to register with 'co4 incident openings in the *bushing 14 and socketmember 8.

"It should be vunderstood that a .series `of Gleiches, .each having f1- rertad@ Of differaptedto receive an object of corresponding ,imensions, butseverally provided with carriers having `like-sized stein ,por ions, n 1 ay be employed for attachment Ito thefjlfalse chuck '8. In the adaptati ,tioularelass `of objects herein shown, namely 'to incandescent lampbulbs 11, the size of onofiny device tothe paraV the clutc-l'i selected is obviously ldetermined by the genera-l contour and proportions vof the lampV upon `which it is designed to operate, the Vclutch being monnted pose, upon a spindle or rod 7 of indefinite for this pLir-g 'in l length adapted to install and remove lamps placed beyond the reach of the operator. rl"he side Walls ot the clutch when forced over the 'bulblexert the requisite gripping action necessary 'to enable the operator to install orremove the lamp froinits soclretV "by rotating thespindle.

Tt will be apparent that obvious modifications may be inane to the fornaci' myA device Y scope ot the invention.A Vlclaiinas myrinventionz,v

1 In a clutch, afbody havingl flexible endless side Wal'ls and a rustoronical receiving chamber, said side v vallsbeing effectiveV4 todistribute localized stresses throughout its circumference wvithout enlargi ng measure of the circu'ilnference.` 7 VE2. In a device of the class Vdescribed,-in

combination, a support and a Work-greceiving portion having the-formation of a l:trustum and provided Witlran-interior chamber,

herein shoivn Without departing from the fthe 'I the side walls of the work-receiving portion being flexible and inexpansible.

3. In a dev and ahollovv Work-receiving portion ca-rried by said supporteengagingpontion and having la conicalormation andan openreceivirlg end, said sidewalls being constructd ed offlexible ineiqjansiblesubstance.v i

t. In a device of the c lass described, 'in combination, a support-engaging portion and a Work-receivingportion havingfstraight sloping side Walls and `'having an open re-l ceiving end, the said `side ival'lsbeing flexible and inexpansibl'e;

5. 11n-device o combination, acari-ier, a dependingexteir sion memberon the carrier,a A barrel mount' ed on the carrier, and securing means, said barrelhaving a con-ical Vformation ivi-th endless -flexible'side Walls andan open receiving end. A

6. ln a clutch, in combination, a carrier having a tapering stein member tor detachlable 'connection lwith asupp0rt, and "a hollovv conical Vbody mounted onthe carrier-and "havingdlexible inexpansible side Walls and an open receiving end` f f l-*In a device of mounted on ene `eil-dof the spindle and having an open receiving end, and a carrier `having a"circular body-portion `and a stem ce of the class described, in i combination,V a support-engaging port1on,.

Vthe vclass described, in "combination, 4a spindle, a. socket member f the class described, in 1,

xmember depc-xnding `frointhe Vb'odypor-tion f and adapted to vlit inte saidrecess in the socket-member, said carrier having iiexible extending .above the carrier,V

inexpansible side Wall-s forming a frustrum Y 8. In a device of the class described, in combination, asupport, a clutch of frustoconical `formation movably mounted on the support and having a hollow,V ,receiving chamber and an open receiving end, said chamber having Vflexible endless side Walls, and means for imparting rotary and Vreciprocating movements to the clutch.

9i In a device of the class described, in combination, a Spindle having a head with an open receiving end, a carrier having a stemA member extending into said head, locking means for detachably1 securing the carrier to said Ahead, and a clutch member on said carrier.

l0. In a clutch, in combination, a perforate carrier Vand a clutch; member mounted HAROLD D. GRINN ELL.

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