US1632968A - Automatic cut-off - Google Patents

Description

Patented June 21, 1927.

UNITED STATES PATENT ori-Ica MARVIN F. mers, or ELECTRA, TEXAS.

yAu'r'oiserarrc CUT-OFF.

Application med August 12, 1925. Serial No. 49,783.

A `further object is to provide an auto-l matic cut ofi' of the above mentioned character which will at alltimes be positive and efficient in its operation and will not in any way interfere with the operation ofthe rewinding mechanism.

A further object is to provide an automaticcut off of the above mentioned character which is simple in construction, inexpensive, strong and durable Aand further well adapted to the purpose for which it is designed. l u .,-Other objects and advantages ofy this in- -vention will become apparent during the course of the following description taken in connection with the accompanying drawing.` l In the accompanying drawing rforming a part of ythis application and in which like numerals designate like parts throughout the same: l

c Figure 1 is aside elevation of the cut off embodying my invention showing the manner in which the same is associated with the rotatable reel supporting shaft, and the f bracket therefor, and Figure 2 is a vertical sectional view taken approximately on line 2-2' of Figure 1. f

In the drawing, wherein for the purpose of illustrationk is shown the preferredy embodiment of my invention, the numeral 1 designates a post, or standard, the lower end of which is providedfwith a substantially U- shaped bracket 2 for facilitatingthe clamp- 451 ing of the standard or post on a suitable support. The upper end of the standard or post is provided with the transversely extending bearing 3, in which is journaled the. intermediate portion of the shaft 4. A moving picture film yreel'is adapted to be removably supportedv on the forward end of the rotatable shaft in the manner well known in the art l cut off whichv ,the open rear side of the casingis also proyand 13 respectively. These discs are of the Von the rear portion of the shaft 4 and is dis- The device described above formsy a part of any well known type. of motor operated movingpicture film rewinding mechanism, and for the purpose of automatically cutting off the motor which operates the rewinder after the film has been unwound from one reel and Wound upon another, I have provided a highly novel, yet simple attachment, the construction of which will be presently described.

` The automatic cut off embodyingmy invention` comprises a casing 10 which is adapted to be secured on the rear portion of the post, or standard 1, atthe upper end thereof, and in order' to 4secure the casing thereon, it has been foundnecessary to first remove the usual brake associated with the post and shaft, and a bolt 5 is then placed through .a suitable opening provided therefor in the -rfronty of the casing, and ythrough the post orstandard, in the manner clearly illustrated in Figure 2. The front of the casing is also provided with an opening 6 to -permit the rear end of the rotatable shaft 4 to extend therethrough and the removable cover 7 which is adapted to be secured over vided with an opening 8 in registry with the opening 6 through which extends the threaded rear end 9 of the shaft.

Carried by the intermediate portion of the rear end of the shaft 4 which is disposed within the casing 10 is the annular flange 11. Slidably arranged ony the rear end portion of the shaft, and disposed on opposite sides of the metal flange 11 are ythe fiber discs 12 same diameter as the flange 11, as is obvious from the construction shown in Figure 2. The purpose of thediscs will also hereinafter be more fully described. For the purpose of forcing the discs into frictional engagement with the opposed faces of the meta-l flange 11, there is provided on the rear end portion of the shaft 4 the coil springs 14 and 15 respectively. A collar 16 is secured posed adjacent the inner side of. the front wall of the casing 10, and the coil spring 15 which encircles the shaft 4 is disposed between the collar and the disc 13. A nut 17 is threaded on the threaded end 9 of them!- shaft 4, and the coil spring 14 is disposed standingspaced eontactffingers21 and 22 respectivelyare supported on ltlie block 19 adjacent one end thereof and are electrically I connected together as i indicated generally at 23.

'The sivitch'fu-rther includes the lever 24 26. This bracket 25 is also Wired in thecircuit to the motor (not Jsliown)-provicled for operating `the iilm reWin'ding f mechanism. The Wiring WhichA leads from thesvvitch is indicated at `27.

The lever: 24 isof such lengtliasto extend beyond the spi-ing Contact fingers 21 and22, and between Whichfthe free end portionof `the lever is adapted to bedisposedas will be presently apparent. A^link`28 also of fiber pivotally condiscs as at 30. 'Itis of course'understood that the upper end ofv theflink is disposed between =the spaced' ears. In th-isi manner, the switch is operatively connectedtoft-he discs.

A coil springl isv provided: for `normally forcing the lever 124 upwardly `out-of engagement with the contact fingers 21 and whereby the circuittothe'niotor willbe broken, Vand ffor the purpose of limiting the upward swinging movement of the lever, there is provided the stop-memberr32 which is secured on the block 19. This stopemember is preferably yin the fform of'afliook, as is clearly illustrated in Figure'2. :The operation of my automatic cut oif may s'be briefly stated as folloivsz'vlVhen ay reel is placed on the forward endoflthe shaft 4, and the same is operatively connected with the other reel whereby the film mayibe Wound fronione reel'onto another, asv-soon asthe shaft 4 rotates, -the discs `Will be brought finto frictional engagement lwith the flange 11, and asa result,fthe lever 24 of the switch Will be-forced into engagement with the spring contact fingers-21 and :22,fthus closing thelcircuitl to the motoigandsperniitting the .automatic operation of-theffilmfre Winding mechanism. Wliilethefreeend of the lever is held between theV spring contact ,..to ,..rotate, :force theeleverifr24 upwardly so.;t,l1at ;the free fingers, the shaft 4 will be permitted to rotate freely.

As soon as the reel on the shaft 4 ceases the 4Hspring 31. will` automatically end thereof will be brought out of engage- .mentwitli,thespring contact fingers 21 and 22, thus automatically breaking the circuit is vpivotally connected Aat itsilowerend to thefree end ofthe lever 24 yasat29. The upper end ofthe fiberlink is -necte`d tov the ears of the, respective lfiber i bodiment of toeivit-liout 'departing from -.tof-theniotor and stopping the operation thereof. The stop 32 will limit the upward swinging: movement of the lever as Well as the link 28, and the ears 18 formed on the respective ifiber Idiscs.

llt -Will thus be f seent from thefforegoing descriptiomthat al cut off liasibeen-provided for use in connection with motor voperated moving 4picture *film reivinding` mechanism Whi'chiniay be readily. `and easily.` installed or which is pivotally-supported at-oneendvon the bracket-25 -ivhi'ch is` also supported on vthe'blocki19,'the pivot' being illustrated at attached vonthereW-lnder, aiidwwill at all tion.

fFurtliermoreythe simplicity in Whichftlie present device is constructed makes thesame veryffinexpensive, and Willnot :in ,any Way interfere with fthe .operation ofk the-reel.

Wlii-leel have shown 'thefpreferrediemthe uinvention itis to be understood that minoriclianges inthe size, shape, and arrangement of partsi maybe Iresorted Lthe spirit of the invention, and ztlielscope ofthe appended claims.

Having thus :described the invention-,What

@I claim ias new .is

l. In combination With a rotatable 'reel supportingl "shaft, of a. yswitch @for controllingtlie circuitwto an electricimotorfsaid switch .including 4- a Ypairffof spaced contact iniembersfandha :pivotedE lever-` adaptedf to `:be `disposed vbetween v-said contacts, ymeans arnranged on said. shaft and operatively connected with; said :lever foriv moving i the-@lever into engagement with the contacts whenthe ,shaft Y'is rotated, `said-nieansy comprising a I flange i arranged on` the i rear. end Vport-ion'vof i the shaft, afpair :of i `discs arranged on f the isliaftz andi adapted for'frictional engagement with opposed faces ofi the'ilangesand a con- 1iectio1i',bet\veenfthe:discs and tliefree end of the f' lever, and znieans @for automatically `disengag'ing Vtlie'flever `fronift-he 'contacts v:When the sha-ft stops rotating.

. switch including a members,,

yranged on said. sha-ft and ciate'd @with f the' lever fori `into an operative .position '2. -fIncombination avith-a rotatable' reel supporting shaft, of a switch "for controllingthe circuitftoan `eleetricinotor, said pair `of spaced -contact and .af pivotednlever adaptedv` to be disposed `between said icontactsf means aroperatively assomoving the; same AWhen said shaft is rot-ated, said` means comprising af'flange arranged 'on the rear end iportioni'of lfthe discsrslidable onzthe shaft,

resilient means cooperating With tliefo'discs and associated with said shaft for moving the discs into frctonal en agement with the respective faces of the ange, ears extending laterally from the discs, a link pivotally secured at its upper end between said ears and at its lower end to the free end of said lever, a coil spring cooperating with the pivoted lever for automatically moving the same to an inoperative position when the shaft ceases to rotate, and a stop for lim- 10 iting the upward swinging movement of seid pivoted lever.

In testimony whereof I afiix my signature.

MARVIN F.' HIPPS.

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