US1796181A - Apparatus for shaping flat-built casings - Google Patents

Description

March 9 A. o. ABBOTT, JR 1,796,181

APPARATUS FOR SHAPING FLAT BUILT CASINGS Filed Feb. 26, 1929 INVENTOR. fld/v'an 0. 19 55021, J7:

AT RNEY Patented Mar. 10, 1 931 UNITED STATES PATENT; OFFICE ADRIAN O. ABBOTT, JR., OF DETROIT, MICHIGAN, ASSIGNOR TO MORGAN & WRIGHT, OF

1 DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN APPARATUS iron srmrme FLAT-BUILT CASINGS' Application filed February 26,1929. Serial No. 342,875.

"i; 'This invention relates to a device for ex- 'pa-nding pulley bands into the form of a tire casmg.

In building automobile tire casings it is I usual to assemble the constituent parts of the easing on'a drum having a fiat face so as to form an endless band known in the art as a pulley band. The pulley band is shaped intothe form of a tire casing by what is known as a vacuum box which consists of a circularly shaped hollow box provided with aperturesto receive a pulley band and the in- 'teriorofwhichis connected with a device for reducing fluid pressure. The reduction of the fluid pressure within the vacuum box results in a differential pressure acting upon the pulley band due to the atmospheric pressure which causes'the pulley band to expand into I the vacuum box and into'the shape of a tire *casing. V The apertures which are provided to" permit the ready insertion of the pulley band into the vacuum box are of a diameter larger than the outside diameter of the pulley band in order that the pulley band may be readily inserted. In order that the device for'reducing pressure within the vacuum box may be effective, it is necessary to provide some means to effect a preliminary seal between the vacuum box and the pulley band so that a differential pressure may be set up upon the operation of the pressure reducing device. It is the object of this invention to provide a new and improved device for effecting the seal between a vacuum box and a pulley band inserted therein. It is also the object of this invention to provide a preliminary sealing device for a vacuum box in the form of a ment with the top and bottom plates of the vacuum box and so constructed that upon 1 1 movement of the member into contact with the pulley band a seal between the pulley band and the member will be effected on one side pear .in thefollowing detailed descriptions member slidably arrangedin sealing engage-.

taken in connection with the accompanying drawings in which:

Fig. 1 is a plan view of a preferred form of my invention. 1

Fig. 2 is a diagrammatical cross sectional view of the device shown in Fig. 1.

Referring to the drawing the vacuum box 1 consists of the bottom plate 2 and annular side 3 integral therewith to which is hingedly fixed as indicated at 4 the top plate 5 which is arranged to open and close the casing. A suitable gasket 6 is provided between the top plate 5 and side wall 3 to render the seal therebetween substantially air-tight. An aperture 7 is provided in each of the bottom plate 2 and the top plate 5. The vacuum box is mounted upon a suitable pedestal 8. The

pedestal 8 forms a platform upon which the will be properly centered with respect to the vacuum box when it is first inserted therein. Suitable pipe connections 9 lead from the interior of the vacuum box to any suitable means for reducing the pressure within the vacuum box such as a pump.

In order to effect a preliminary seal between the vacuum box and the pulley band a slidable member or plate 10 is mounted upon the top and bottom plates 2 and 5, preferably being pivoted thereto by any suitable means such as pins 11. In order to maintain an air-tight seal between the slidable arms 10 and the top and bottom plates 2 and 5, a gasket or sheet 12 of rubber or leather or similar material is provided between the sliding members 10 and the top and bottom plates 2 and 5. This gasket or sheet 12 may be secured to the top and bottom plates 2 and 5 in any suitable manner such as by cementing. That slidable plate which is mounted upon the bottom plate 2 of the vacuum box is provided with an upstanding arm 13which is forked at its upper end as indicated at 14. That slidable member 10 which is mounted upon the top plate 5 is provided with a lug 15 which extends between the tines of the fork 14:. The slidable plate 10 which is mounted upon the topplate of the vacuum box is -'providedwith a suitable manipulating handle 16 and upon movement of that slidable member a. corresponding .movement of 5 the slidableplate lO'mounted upon the bottom platefi-ot the vacuum-box'is efl'ected due to the-ioonnection between theitwfo slidable plates provided by the yoke 14 and the lug While the slidable members 10 have been de- 10 seretd as'teing pivotally mounted upon the box they may be mountedupon the top and bottom plates of the'vacuum box irr'anyother' suitable manner so long. as theslidingen- 15 gagement therewith is "maintained. For "instance sa p in andslot connection permitting J ,the sliding-smembers vlOeand top :and bottom plates 2 and 5. Also the interconnecting -V mimeans between the-topandhbottomsliding 7 I a a tire casing while itg-isain the vacuumlbox. Clamping rings ori a bullringsareapplii'to f the beads of thel casi'ng thex top; platelb is 7 members 10 may-be other than the'l-ug and -yoke construction -hereinabove .-d-isclosed, or theeto'p and bottom slidable members: 10v may aloeindependentlymovable. It is to be noted 5;:thatv thei-presei' t lug and slot connection be- .tween: the ,top ian'd bottom-sliding plates 10 -vpermitsuthegtopg plate 5 or vacuum box. to be i-littedssoaas to open the-vacuumibox and to permit."thesformedtire casing to be removed therefrom. Although the apertures 7 proavidedin thev top and-bottom; plates 2 and :5 tare norm-allyvcircirlarl-and may be so shaped in the, present ;instance,it is preferred-to. pro

v In ;the operation of the -hereinab0ve .rdisclosed; devicey a pulley' band .17 1 is inserted; throlighthe apertures Hofthe top nnd g'bot- ,tom; plates of-thevacuum box an d-allowed to restiupon. the. top ot pe'destal. 8. V During the :vflnsertion of i the pulley band the sli-dable plates :10 are in the position. shown in full "between the pulley band and the vacuum' box,

4 j-the slidabla-plates'f10 rare manipulated-so I as to-be move'd intocontact with the pulley-lo and 17. As the slidableplates {10 contact with he; pulley band that side of the pulley band V :Q ppoSi-te the slidable plate T10; is thrust-1 into go' contaet-with the margins definingttheapertaxes 7 Which efiects asealabetweens such martween g throughout a a distance q sufiicient to complete the .seal around the entire circum- }I8IIG8 of the};p.ulley band. Whenthe-preor; liminary seal has been formed: between the to vacuum -box and the; pulley band- :as} -j ust 'deascribed; an evacuating means is set jintooperationsoas to reduce the'fluid pressure within i'the vacuu'm box therebyfbuilding'up a .difi'erential epressure due to atmospheric pressure afifiswhichc'causeslthe pulley band to be expanded readil'y inserted-therein afid yet when th top and bottom plates 2 and 5 ofthe-va'cuum .maybe repeated. it 7 1 pulley band; a" curved arm pivotally mount'ediir on each ofisaidi top; and bottom plates'aiid in o sealing-engagement therewithgthe' curvature and arrangement of each arm being suchthat uponmovement-ot'the'armiintdcontactwith a pulley: band; positioned in; the-shaping box a e-120 and forced within the vacuum box thereby shaping the same into a tire casing. The

edges of the apertures 7 form the final seal between the vacuum box and the; pulley band as the expansion of the pulley band progrosses. Asa-will be apparent, from the above pulley-bandds thrust i a gainst the margin bounding theaperture a seal between-the pulle'yband and the'margin will. be readily ef-- fepteda .However,. sucha seal is satisfao' torily"formed"eventhough the apertures 7 i are circular due to the ,flexibi-lityLof thepulley ""sliding'movement may be provided between lif-tedso as to'openithe vacuumlboxlandlthe tire casing containing the islre so moved from ,the vacuum: box. fill 1e; top plate i .5 may be lowered: and the' ,slid ngi.plates .10

moved. into the positi onashown I in Fig,1,whereuponw thejeycle o solperatlons V --e5 lt hile one storm ,OfLthe invention :has 'lbeen i specificallyldescribed.andshowm itli s obvious to one skilled in the art that--manyinodificavi debvalapertures for-1a: reason whichewill -35? appear inthe following description.

tions in the detailsof construction ,andTinatecluded within -the scope vof the following claims; k

. 7 7 Having thus described invention, what Iclaim and desir e toprotectbfLettersrPatent lines 1n Fig. 1. "In order to effectasseal plates provided withr apertures to receive, at

. pulley band, acurve d arm ;slid ab1yf,mounted on each of said top and bottom platesandcin sealed engagement therewith, ,the curvatl lre and arrangement of each arm .beingsuch that uponmovementof thearrn into contact a 1 1 V pulley. band positioned thelvacuunilboxka igins-iand' that port oniot thegpulley band in contact. therewith. The contact between- .the .;;mouable arms or; plates :10 extends around 1155111116g plllleycbainCl-filld forms a :sealct'herebesen isformeidl between the arm 'andla circumferential. portion of; thejpul'ley' band and between themargin' ofthe' aperture andj'the remaining circumferential po'r'tion of the tween saidarms. 1

2. A- shaping box hav-ingtop an 'dF b'ottom plates provided with erm end receive a pulley; band and ame'c'ha ni'c'al "conne'c tion' beseal is formed between the arm and a circumferential portion of the pulley band and between the margin of the aperture and the remaining circumferential portion of the pulley band, and a mechanical connection between said arms.

3. A shaping box having top and bottom plates provided with apertures to receive a pulley band, a curved arm pivotally mounted on each of said top and bottom plates and in sealed engagement therewith, one of said arms having a tail piece terminating in a bifurcated portion and the. other, of said arms having a tail piece fitting insaid bifurcation, the curvature and arrangement of each arm being such that upon movement of the arm into contact with a pulley band positioned in the shaping box a seal is formed between the arm and a circumferential portion of the pulley band and between the margin of the V aperture and the remaining circumferential portion of the pulley band.

4. V A shaping box comprising top and bottom plates provided with apertures to receive a pulley band, one of said plates being hingedly mounted, a curved arm pivotally' mounted on each of said top and bottom plates and in sealed engagement therewith, a tail piece on one of said arms extending across said box between said plates and terminating in means for engaging a tail piece on the other I 7 arm, and a tail piece on said other arm oooperating with said engaging means.

5. A shaping box comprising top and bottom plates provided with apertures to receive a pulley band, one of said plates being hingedly mounted, a curved arm pivotally mounted on each of said top and bottom plates and in sealed engagement therewith, a tail piece on one of said arms extending across said box between said plates and terminating in a of Michigan,

vbifurcated portion, and a tail piece on the other arm engaging said bifurcated portion. Signed at Detroit, county of Wayne, State this 21st day of February, 1929.

ADRIAN O. ABBOTT, JR.

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