US1100785A - Advertising-machine. - Google Patents

Description

P. C. SCOTT.

ADVERTISING MACHINE.

APPLICATION FILED APB..12, 1913.

IN VH1 TOR 570/61 500W 2 SHEETSSHEET 1.

Patented June 23, 1914.

w & WM 7 1 s a .r 0 m m 1 G ATTORNEYS P C. SCOTT.

ADVERTISING MACHINE. APPLICATION FILED APR. 12, 1913.

Patented June 23, 1914.

2 SHEETS-SHEET 2.

INVENTOR @6077 WITNESSES ATTORNEYS smrss ma -T orricn mm c; score, or nurnm new; I

' msmsxndmenmn m nace citizen of the United. States,- anoh a resident i a of: Eunrlee village, inthe-county or Dou ie;

and: State. of Nebraska, have invented a new and useful? Improvement in Advertising liim chines, oi which: the following is a: specifics.-

.- My invention is gmimprovement in aidivertising machines, and has for its object the of: a: machine at the character specified, adapted to -be arranged ingpnblic places as for instance, in street. cars and the like, wherein: a contain or band is provided having a series of advertisements on one face, and wherein: mechanism is provided for moving the curtain in such manner that the advertisements will be displayed in; sequence, each beinggpresented to view, and held in fixed position; for a predetermined length of time and themmovedfi out of position to give place to the succeeding adrer tisement, and wherein moansis provided for reversing the direction of movement of the curtain near each end of its travel,

Inthe drawings'rli-igure 1- is a front view of! the improved machine with the cover. removcd,1Fig.-.2 is arbottom plan view, Fig. 3. isnan end View, the inclosing casing being in section in both Figs. 2' and 3, and

Fig; 4 is a detail sectional view of one-of the cams and. its connections.

The present embodiment of the invention comprises an inclosing'casing 1 of'suitahle size and shape; which may be arranged in the desired position, and which is provided at one end: over the position to beoccupied by the curtain with an opening covered by a. sheet of transparent material as for instance, a pane of glass vthrough which the advertisements lobe exhibited. will appear.

The band or curtain 2 upon which the series ofadvertisements or other reading matter is to be placed, is mounted upon a pair 05 winding rollers 35 and 4, the ends cf the band being attached to the said rollers in any suitable manner inorder that the said curtainmay -be wound thereon. Each ofthesaid. rollers 3 and 1 is. provided with trunnions 5 and 6 respectively, journal'ed in supporting brackets 7 secured. to the back of the casing and extending forwardly therefrom as shown more particularly in Fig. 2.

A display roller 8 is arranged adjacent to each of the Winding rollers 3 and 4 and on Specification oil Iieftersratanr;

Agplieatiolflled Ayn-1251913. Serial F0. 760,665.

PatentedJune-23J914.

the outer side thereof, each.- of the said dis= rollers: having trunnionsor journal pmsQ-ymimaled in extensions 10 in the said bnckem- 7.' Each of the dis layroll'ers is wronged adjacent to the e wall of the casing, as shown. in Fig. 3,. so that the band 2* entends pra'cticnliy from one side of the casing to. the other. i

' The display mikes are also arri'mged fxnther finiward' than the winding-rollers, so that the outeror display'f-ace of the band will be adincent to the. transparent material, and adjacent to -the front 015 the casing; The ends of the band pass over the display and them rearwzirdlyand inwardly to theirconnectionwith the winding rollers;

pollen 4* and a 1'1 securedto the trunnion of the said roller between the end of the roller. and the bracket. 7., and the said a stub shaft 13 jom'neled inthe bracket 7 and. provided on the opposite side of'the bracket from the piniom with a; sprocket Wheel-1 1.. On inner trunnionfi of the windtheneto on the opposite side of the bracket 7' from the roller; and the said bracket 7 is extended toward the Winding roller 3, as shown more particularly in Fig. 1.

The inner side edge of the band 2'. is 511 ported and guided between the display m the said mllers, by upper and lower guide plates 15,..each plate having a central open.- ing 16 at the edge ofthe curtain or band and the two plates are secured to and supported brackets 1-7 extending forwardly from the bottom of the casing. Each of the said guide plates-1P5 is recessed on its inner face topermit the passage of a; series of buttons 18, the said buttons or stops being secured to the inner edge of. the band or curtain 2 at intervals, corresponding to. the arrangement and. spacing of the display matter. That is, each of the said buttons: 01: sto s is so. arranged that. when; the button or t e stop engages mechanism to be described later, and arranged at the recess 1610fthe plates,-the display matter corresponding to the button or stop. will be in display position before the opening of the casing.

An 818012130" motor 19 is providedfor operatingthe. display mechanism, the said'motor being supported by an annular support 20,. secured; to the bottom of the casing as This roller3 is of greater length than the 'ers and at approximately half way between pinion meshes with a similar pinion 1191v on 'i-ng roller 4- is a sprocket wheel 15, secured a sleeve 38 on the shaft'27, and a clutch.

shown at 21, and binding posts 22 are connected with the side of the casing 1 adjacent to the motor for receiving the line wires 23 that supply the current to the motor. The binding posts are connected with the motor, and a switch may be-arranged at any desired point for connecting the motor with the line wires.

The shaft 24 of the motor is provided with a worm 25, which meshes with a worm wheel 26 on a shaft 27 journaled in supporting brackets 28 and 29 and in an extension of the bracket 7. A worm 30 is secured on the said shaft adjacent to the Worm wheel 26 and the said worm meshes with a worm wheel 31 on a stub shaft 32 journaled in bearing lugs 29 extending laterally from the bracket 29. The stub shaft is provided with a worm 33, which meshes with a worm wheel 34 on a countershaft 35 journaled in the brackets 28 -29, and the extension of the bracket .7 parallel with the shaft 27 The sprocket wheel 15 of the display roller 4 is connected by a sprocket chain not shown to a sprocket wheel 36 arranged on the shaft 27 in a manner to be described, and the sprocket wheel 14 of the winding roller 3 is connected by means of a sprocket chain not shown with the sprocket wheel 37 arranged on the same shaft 27. The sprocket wheels 36 and 37 are journaled on section 39 is secured toothe sleeve. The sprocket wheel 36 is provided with a clutch section 40 and the sprocket wheel 37 is provided with a clutch section 41. A clutch 42 is keyed to the sleeve 38 and is movable longitudinally on the said sleeve between the clutch sections 40 and 41, and one arm 43 of an elbow lever has a fork engaging an annular groove of the said clutch 42. The elbow lever is pivoted to a lug 44 on the extension of the bracket 7 and the other arm 45 of the said elbow lever has an opening through which passes the end of a rod 46, to be later described.

It will be evident that when the clutch 42 is moved toward the sprocket wheel 36, the said sprocket wheel will be clutched to the sleeve 38, while when the clutch is moved toward the sprocket wheel 37, the saidsprocket wheel 37 will be clutched to the sleeve 38. The sleeve 38 rotates always in the same direction, so that the sprocket wheels 14 and 15 are likewise moved in the same direction. The sprocket wheel 14 is however, indirectly connected to the winding roller 3, so that the said winding roller 3 moves in the opposite direction to the winding roller 4. The sleeve 38 before mentioned, is connected to and disconnected from the shaft 27 by means of a clutch 47, the said clutch being keyed to the shaft 27 and movable longitudinally thereon toward and from the clutch section 39, the said clutch section 39 being secured to the sleeve 38.

A lever 48 is pivoted at 49 to a lug 50 extending laterally from the bracket 29 and the lower end of the said lever is pivotally connected to the clutch section 47. The up per end of the lever 48 is provided with a roller 51, which is adapted to bear against the rounded end 52 of a trip lever 53, pivoted at 54 to the extension of-the bracket 7, and the opposite end of the said lever 53 is forked as shown at 55, the arms of the fork fitting on opposite sides of the band or curtain 2 in the recess 16 of the guide plates 15. The said arms 55 are so arranged that whenever one of the buttons or stops 18 on the curtain passes into the recess 16 of the guide plates, the said arms will be engaged and the lever will be swun to dis engage the rounded end 52 thereof rom the roller 51 of the lever 48.

The trip lever 53 is normally held with the rounded end thereof in engagement with the roller 51 by means of a spring 56, secured to the extension of the bracket 7 at one end and having the other end engaged with an opening in a depending lug 57 on the under face of the said trip lever. A coil spring 58 is arranged between the,upper end of the lever 48 and the extension of the bracket 7 and the said spring normall draws the upper end of the lever towar the said extension, that is, the said spring 58 holds the roller 51 in engagement with the rounded end 52 of the lever 53.

When a button or stop 18 strikes the arms 55 of the trip lever 53 and swings the said lever to move the rounded end 52 thereof out of engagement with the roller 51, the spring 58 swings the lever 48 into the position of Fig. 2, and moves the clutch 47 out of engagement with the clutch section 39 of the sleeve 38, thus disengaging the said sleeve and the sprocket wheels 36 and 37 from the shaft 27 and from the motor 19. The curtain or band is thus checked in its movement to display the advertisements or other reading matter corresponding to the button 18.

After the lapse of a predetermined time, the clutch 47 is again connected with the clutch section 39 of the sleeve 38 by the following mechanism: An elbow leverconsisting of the arms 59 and 60 is pivoted at 61 to the bracket 29 and the arm 60 is provided with a roller which moves in engagement with the periphery on a cam 62 on the stub shaft 32 before mentioned. Whenever the elbow lever 5960 is moved by the cam, that is, when the high portion of the cam moves the arm 60 upward, the arm 59 is moved toward the lever 48, and the said arm 59 of the elbow lever engages one end of a pin 63 slidable through thebracket 29, the opposite end of the pin being in engagemen-t with the lever 48- between the pivot 49 thereoi and the clutch 47.

When the pin is so moved, the lower end of the lever and the clutch 47 are moved toward the clutch se tion 39 of the sleeve 38 and the spring 56 at once swings the trip lever 53 into normal position, that is, with the rounded end 52 thereof in engagement with the roller 51 on the lever 48, to hold the said lever 48 with the clutch 47 in engagement with the clutch section 39 of the sleeve 38.

Whenever the clutch 47 is in engagement with the clutch section 39 of the sleeve 38, the said sleeve is rotated with the shait 27. The sprocket wheels 36 and 37 are both journaled loosely on the sleeve 38 and the clutch 42 is provided for connecting one or the other of the said sprocket wheels to the sleeve 38.

A cam 64 is secured on the counter shaft 35 at the rod 46, and the said rod 46 has at its lower end a bearing journaled on the shaft 35; The said bearing 65 is provided with diametrically opposite lateral rollers 66, the said rollers being in engagement with the periphery oi the cam 64. The bearing 65 is held in engagement with the cam by means of a collar 67 on the shaft and coil springs 68 arearranged on the red 46 on opposite sides oi the arm 45 of the elbow lever 43-45. By means of a nut 69 at the upper end of the said rod 46', the tension of the springs 68 may be regulated. The cam 64 is so arranged that once duringeach complete rotation of the countershaft 35, the rod 46 will be moved'u'pwardly, to swing the elbow lever 43-45, to move the clutch 42 longitudinally of the sleeve 88. When the said elbow lever is moved in one direction, the sprocket wheel 36 will be connected to the sleeve 38' while when the elbow lever is moved in the opposite direction, the sprocket wheel 37 will he connected to. the said sleeve 38. I

In operation, current being supplied to the motor, the shaft 27 is rotated continuously in one direction. With the parts arranged as shown in Fig. 1, the sprocket wheel 36 is clutched to the sleeve 38, and the lever 48- is on the pointof being returned to its normal position, that is, to a position where the clutch 47 will be in engagement with the clutch teeth 39 of the sleeve 38. When the lever is so moved, that is, by the pin 63 and the elbow lever 59-66, the spring 56 will return the trip lever 53 to normal position, and the said trip lever will; hold the lever 48 with the clutch 47 engaged with the clutch teeth 39 of the sleeve 38. The sprocket wheel 36. is connected to the sprocket wheel 15 of the winding roller 4 and the band or certain 2 is moved downwardly in Fig. 1, and the said band is wound on the roller 4. The Buttons or steps 18 are so arranged that whenever a display,.that is, a section of advertising matter or the like, is in position behind the display opening of the casing 1, a-button or stop 18 will engage the arms 55 of the fork of the trip lever 53 and will swing the said lever into the position of Fig. 1. The spring 58 will 48 is on the said stub shaft. The time also depends upon the arrangement of the cam 62, since it is the said cam that operates the replacing mechanism, and the said time may be of any desired length, depending upon the said arrangement of the cam and the s of the stub shaft. The time during which the clutch 42 remains in one position, that is, in a position to clutch either the sprocket wheel 36 Or 37 to the sleeve depends upon the speed oi the shaft 35 and the arrange ment of the cam 64.

In the present construction, the cam 64 moves the rod 46 twice, once in each dime-- tion during each complete rotation of the shaft 35, and as a con uence shifts the clutch 42 in the same manner duringeach rotation of the said shaft. In the present construction the sha'it 35 rotates very slowly, requiring eight minutes to complete a rota; tion and the length of the band is such and the periods of stoppage are such that the entire curtain will pass from one winding .roller to the other and back again during this time, that is, duringeight minutes. It is obvious that the arrangement is entirely dependent uponthe length of thecu tain or hand and thenumher of displays and the time durin which each display is to be left 7 on view. he springs 68 on the opposite sides of the arm 45 of the elbow lever 43--45 cushions the movement thereof, so that there is no jar, and so that should the teeth of the clutch be not in direct register with the 7 .115

clutch teeth of the sprocket wheels, there will be no breakage but the clutch will. be

held yieldingl-y until the teeth do register.

Since the sleeve 38 rotates in the same directionat all times, it is neoe saryto. provide means for reversing the movement offthe roller 3, and the pinions 11 and 12 provide this reverse movement. It wili' be noted from an inspection 04 Fig. 1 thatlead 76 connect the 22' with the motor.

It will he noticed from an inspectionof Fig.2- that a spring 76* is arranged between supportig bracket 29, and the movable.

crutch section 47, the said spring-"acting normall to, move the clutch section'toward the a pair of supporting rollers in the case for case having an opening t section 39. When the lever 48 is moved to connect the section 47 with the section 39 of the clutch, the said lever 48 does not positively move the section 47 into engagement with the section 39, "The-said lever merely moves the clutch section 47 out of engageone face with a plurality of sections of dis? play matter arranged in spaced relation, a rough wh ch a section of the display matter may be visible,

supporting the band or curtain behind the opening, a winding roller adjacent to each display roller, a motor, a driving shaftoperatedby the motor, a Sleeve journaled on the driving shaft, 9, pair of sprocketwheels journaled on. the sleeve, a driving connection between one of the sprocket wheels and one of the winding rollers, a stub shaft journaled adjacent to thesother-winding roller and parallel therewith, a driving connection between the stub shaft and the winding roller, a sprocket wheel on the stub shaft, a driving connection between the said sprocket wheel and the other sprocket wheel on the sleeve, a clutch-feathered on the sleeve and movable between the sprocket wheels of. the sleeve to alternately connect said wheels to the sleeve, a clutch for connecting the sleeve to the drivin shaft, a lever for o erating the said clutc a s ring engaging t e lever and normally hol ing the lever with the clutch released, a trip lever pivoted intermediam its ends adjacent to the lever, a spring'normally holding the said trip lever with one of its ends in engagement with the clutch lever to hold the said clutch lever with the clutch in engagement with the sleeve, said trip lever havin a fork extending on opposite sides of the and or curtain, a stop on the band or curtain adjacent to each of the sections of display matter and in position to engage and swing. the trip lever when the said section of display matter is behind the display opening, a spring normally holding the trip lever in engagement with the clutch lever, a countershaft driven by the driving shaft, means operated by the counter-shaft at regular intervals for swinging the Clutch lever into normal position with the clutch connecting the sleeve to the driving shaft, a cam shaft driven by the countershaft, a"- cam on the cam shaft, an elbow lever pivoted adjacent tothe cam shaft and having an arm connected with the clutch feathered on the sleeve, the other arm having an opening, a rod extending through the opening and having a bearing encircling the cam shaft, said bearing having rollers for engagement by the cam to move the rod longitudinally at predetermined intervals, a sprm on the rod on each side of the arm of t e e ow lever, and a nut for varying the tension of the said s r' W v 2. A device of tlie gharacter specified, comprising a band or curtain'provided on one face with a plurality of sections of display matter arranged in spaced relation, ,0. case havinganopening through which a secition ofthe display matter maybe visible a pair of supporting rollers in the, case or supporting the band, or curtain the opening, a winding rolleraadjacentto each display roller, .a motor, a driving shaft operated by the motor, a sleeve journaled on the drivin shaft, a pair of rocket wheels journa ed on the sleeve, a iving connection between one of the sprocket wheels and oneof the winding1 rollers, a stub shaft journaled adjacent to t 'ing roller and parallel therewith, a driving e other windconnection between the stub shaft and the winding roller, 9. sprocket wheel on the stub shaft, a driving connection between the said sprocket wheel and the other sprocket wheel on the sleeve, a clutch feathered on the sleeve and movable between the sprocket wheels of the sleeve to alternately'connect said wheels to the sleeve, a clutch for connecting the sleeve to the drivin shaft, a lever for operating the said clutc a spring on aging the lever and normally holding the ever with the clutch released, a trip lever ivoted intermediate its ends adjacent to t e lever, a spring normally holding the said trip lever with one of its ends in engagement with the clutch lever to hold the said clutch lever with the clutch in engagement with the sleeve, said trip lever havin a fork extending on opposite sides of the and or curtain, a stop on the band or curtain adjacent to each of the sections of display matter and in position to engage and swing the trip lever when the said section of display matter is behind the display opening, a spring normally'holding the trip lever in engagement with the clutch lever, a countershaft driven by the driving shaft, means operated by the countershaft at regular intervals for swinging the clutch lever into normal position with the clutch connecting the sleeve to the driving shaft, means for moving the clutch for alternately connecting the sprocket wheels with the sleeve, means on the countershaft shaft, a pair of sprocket Wheels journaled .on

the sleeve, a direct driving connection between one of the sprocket wheels and one of the winding rollers, an indirect connection between the other sprocket wheel and the other winding roller, a clutch feathered on the sleeve and movable between the sprocket wheels of the sleeve to alternately connect said wheelsto the sleeve, a clutch .for connecting the sleeve to the driving shaft, a lever for operating the said clutch, a spring engaging the lever and normally holding the lever with the clutch released, a trip ever pivoted intermediate its ends adjacent to the lever, a spring normally holding the said trip lever with one of its ends in engagement with the. clutch lever to hold the said clutch lever with the clutch in engagement with the sleeve, said trip lever iaving a fork extending on opposite'sides of the band or curtain, a stop on the band or curtain adjacent to each of the sections of display matter and in position to engage and swing the trip lever when thetsaid section of display matter is behind the display opening, a spring normally holding the trip lever in engagement with the clutch lever, a countershaft driven by the driving shaft, and means operated by the countershaft at regular intervals for swingingv the clutch lever into normal position with the clutch connecting the sleeve to the driving shaft.

4. A device of the character specified, comprising a band or curtain provided on one face with a plurality of sections of display matter arranged in spaced relation, a case having an opening through which a section of the display matter may be visible, a pair of supporting rollers in the case for supporting the band or curtain behind the opening, a winding roller adjacent to each display roller, a motor, a driving shaft operated by the motor, a sleeve j-ournaled onthe driving shaft, a pair of sprocket wheels journaledion the sleeve, a directdriving connection between one of the sprocket wheels and one of the winding rollers, an indirect connection between the other sprocket wheel and. the other winding roller, a clutch feathered on the sleeve and movable between the sprocket wheels of the sleeve to alternately connect said wheels to the sleeve, a. clutch for connecting the sleeve to the driving shaft, a lever for operating the said clutch, a spring engaging the lever and normally holding the lever with the clutch released, a trip 1ever pivoted intermediate its ends adjacent to the lever, a spring normally holding the said trip lever with one of its ends in engagement with the clutch lever to hold the said! clutch lever with the clutch in engagement withlthe sleeve, said trip lever having a fork extending on opposite sides of the band or curtain, a stop on the band or curtain adjacent to .each of the sections of display matter and in position to engage and swing the trip lever 1' when the said section of display matter is behind the display opening, a spring normally holding the trip lever in engagement with the clutch lover, a countershaft driven by the driving shaft, means operated by the countershaft at regular intervals for swinging the, clutch lever into normal position with the clutch connecting the sleeve to the driving shaft, and means operated by the countershaft for moving the clutch feath- -ered on the sleeve. 1

o. A device of the character specified, comprising a band or curtain provided on one matter-arranged in spaced relation, a case having an opening through which a-sect-ion of the display matter may be seen, a pair of supporting rollers in the case for'supporting a portion of the band or curtain behind the said opening, a winding roller adjacent to each display roller to which the ends of the band or curtain are connected,-a motor, a driving shaft driven by the motor, a sleeve journaled on the driving shaft, a pairof sprocket wheels ournaled on the sleeve, a direct driving connection between one of the sprocket wheels and one of the winding rollers, an-indirect driving connection between the other sprocket wheel and the other winding roller, a clutch feathered on the sleeve between the sprocket wheels and mo'vi able between the said wheels to alternately connect the wheels to the sleeve, means operzated by the driving shaft for moving the said clutch at predetermined intervals in oppositerdirections, a yielding connection between the said means and the clutch, aclutch for connecting the sleeve to the driving shaft, a trip lever having at one end a fork between whose arms one edgeof the band or curtain moves, stops on the said edge of the curtain for engaging the arms of the fork to swing the trip lever, said stops being adjacent to the sections of display matter andin position to engage the triplever when the section adjacent tothe stop is behind the display opening, a spring normally holding the trip lever-approximately perpendicular to the edge of the curtain, a lever connected with the last-named clutch and adapted to engage the opposite end of the trip lever from the curtain or band to hold the said lever with the clutch in engagement with the sleeve, a spring acting upon the clutch lever to release the clutch when the trip lever is swung, and means operated by the driving shaft for moving the clutch lever against the resistance of the spring to connect the clutch with the sleeve at predetermined intervals.

face with a plurality of sections of display 6. A device of thecharacter specified, comprising aband or curtain provided on one face with a plurality of sections of display matter arranged in spaced relation, a case having an opening through which a section of the display matter may be seen, a pair of supporting rollers in the case for sup orting a portion of the band or curtain behind the said opening, a winding roller adjacent to each display roller to which the ends of the band or curtain are connected, a motor, a driving shaft driven by the motor, a sleeve journaled on the driving shaft, a pair of sprocket wheels journaled on the sleeve, a direct driving connection between one of the sprocket wheels and one of the winding rollers, an indirect driving connection between the other sprocket wheel and the other wind ing roller, aclutch feathered on the sleeve between the sprocket wheels and movable between the said wheels to alternately connect the wheels to the sleeve, means operated by the driving shaft for moving the said clutch at predetermined intervals in opposite direetions, a trip lever pivoted adjacent to one edge of the band or curtain, stops on the said edge of the band or curtain for engaging and swinging the lever when the display matter adjacent to the stop is in position at the display opening, a clutch for connecting the sleeve to the driving shaft, a spring normally acting to disengage the clutch, a connection between the trip lever and the clutch for holding the clutch in closed position, when the trip lever is in normal position,

. and means operated by the driving shaft for moving the clutch into closed position against the resistance of the spring at predetermined intervals.

7. A device of the character specified, comprising a band or curtain provided on one face with a plurality of sections of display matter arranged in spaced relation, a case having an opening through which a section of the display matter may be seen, a pair of supporting rollers in the case for supporting a portion of the band or curtain behind the said opening, a winding roller adjacent to each display roller to which the ends of the band or curtain are connected, a motor, a driving shaft driven by the motor, a sleeve journaled on the drivlng shaft, a pair of sprocket wheels journaled on the sleeve, a direct driving connection between one of the sprocket wheels and one of the winding rollers, an indirect driving connection between the other sprocket wheel and the other winding roller. means operated by the driving shaft at predetermined intervals for alternately clutching-the sprocket wheels to the sleeve, means operated by the driving shaft for clutching the sleeve to the shaft at predetermined intervals, a spring normally acting to release the sleeve from the shaft,

1 '1 a trip lever for retaining the sleeve clutched to the shaft, a stop on the band or curtain adjacent to each of the sections of display matter, the trip lever being in position for engagement by the stops to swing the same to permit the spring to release the clutch.

8. A device of the character specified, comprising a pair of winding rollers, a band or curtain having its ends connected with the winding rollers and winding thereon, a driving shaft, a sleeve loose on the driving shaft, a pair of sprocket wheels loose on the sleeve, a direct driving connection between one of the said wheels and one of the winding rollers, an indirect driving connection between the other sprocketjwheel and the other winding roller, means operated by the driving shaft at predetermined intervals for alternately clutching the sprocket wheels to the sleeve, means operated by the driving shaft for clutching the sleeve to the shaft at predetermined intervals, a spring for releasing the clutching means of the sleeve and the shaft, means for normally holding the sleeve clutched to the shaft, and stops arranged in spaced relation on the band or curtain and adapted to engage the said lastnamed means to release the clutch.

9. A device of the character specified, comprising a air of winding rollers, a band having its en s connected with the winding rollers and winding thereon, a driving shaft, a sleeve loose on the driving shaft, sprocket wheels journaled loosely on the sleeve, a direct driving connection with one wheel and one of the winding rollers, an indirect driving connection between the other wheel and the other r'oller, means operated by the driving shaft at predetermined intervals for alternately clutching the sprocket wheels to the sleeve, means 0 erated by the driving shaft for clutching t e sleeve to the shaft at predetermined intervals, normally active means for releasing the clutch, means for restraining the operation of the said releasing means, and means on the band arranged at predetermined intervals for releasing the restraining means.

10. A device of the character specified, comprising winding rollers, a band winding its ends on the rollers, a continuously rotating driving shaft, a sleeve on the shaft, means operated by the driving shaft for alternately connecting the sleeve directly to .one of the rollers andindirectly to the other roller, means operated by the driving shaft for clutching the sleeve to the said shaft at predetermined intervals, normally active means for releasing the sleeve from the driving shaft, means for restraining the operation of the said releasing means, and means on the band for engaging the said restraining means at predetermined intervals to release the slceve from the shaft.

11. A device of the character specified, comprising winding rollers and a band sleeve from the driving shaft, a trip for re- 10 straining the operation of the said releasing means, and means on the band for operating the trip at predetermined intervals.

PAUL (J. soorr;

\Vitnesses:

CLAY H. THOMAS, AUGUSTUS D. WILLIAMS.

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