US1382040A - Endless-film reel - Google Patents

Description

L. A. WILSON.

ENDLESS FILM REEL.

APPLICATION FILED SEPT. 25. 1919.

llll'Ylvl.'.A 'Lil' A. WILSON, 0F NEW YORK, N. Y.

'ENDLESS-FILE EEL.

Specification of Letters Patent.

Application filed September 25, 1919. Serial No. 326,215.

which a spirally wound endless hlm can be.

unwound at its core in amounts equal to that simultaneously wound upV on the outside thereof. .Y y

'lhe4 invention consists essentially of a -rotating turntable to support a spirally wound endless :Edin and a rotating guide cone to guide the discharge oi the iilin from its core. Means are provided to rotate the guide cone at a greater speed than the turntable,

thereby compensatingthe dierence of diameters oi the film at its :outside and at its ,core to equalize the amounts or discharge and intake of the hlm.

ln the accompanying drawings Figure l shows atop plan view of a reel with its endless iilm eiremplii-ying the invention; F1g.2 shows an elevation and partial section oi lli l on the line 2, 2.

i. hollow base housing is shown with the lower portion 20 having the toot 2l and the upper contracted head portion 22. c

A step 23is termed between said portions.

A bracket 25 with the journal bearings 26- and 27 is fastened to the lower portion 20. A stationary guide sleeve 30 with the upper liange 31 is coaxially located in the head portion 22 and has li'orined therewith the arms 32 having the eetf33. 7lhe latter are secured to the innerk Itace of the wall of the said head portion 22.

A second guide sleeve 36 with the flange 37 is coaxially located within the guide sleeve 30. A ball bearing cage 38 with the ball bearings 39 encircles the sleeve 36 and said" ball bearings bear upon the dange 3l.. The flange 37 bears upon the ball bearings 39.

A turntable 40 bears upon the Harige 37 and p is secured thereto by means of pins or rivets 4l. A vertical cone driving shaft 45 is guided in the sleeve 36 and its lower end is supported ina Ifoot bracket 46. lA ball 47 in the bracket 46 supports the lower end of the shaft 45. A bevel gear 48 -is fastened to Patented June 2i, 192.1.

the lower end of the sleeve 36. A driving lshaift 49 is supported in the journal bearing .26 of the bracket 25. A bevel pinion 50 is fastened to the shaft 49 and meshes with the bevel wheel 48. A bevel wheel 53 is i'astened to the shaft 45 and is smaller in diameter than the bevel gear 48. A second drive ing shaft 54 is journaled in the journal bearing 27 and has fastened thereto the bevel pinion 55 that meshes with the bevel gear 53. A ball bearing cage 56 with the ball bearings 57 encircles the shaft 45. The ball bearings 57 bear upon the turntable 40. A guide cone 60 having the lower face 6l is fastened to the shaft 45 andA its lower face bears upon the roller bearings 57. A'n endless hlm 63 of a motion picture machine (not shown) or the like, is placed upon the turntable 40 and encircles thel guide cone 60.

A bracket 64 with the threaded upper end 65 is secured. to the lower portion 20 of the Y the spring 7G. A pair oi thumb nuts 72, 7 3

bear against the clamping plates 66 and 67 and maintain the spring 70 in operative position. A pair of journal brackets 76, 77 are l secured'to the ends of the spring 70. A tension guideiroller 78 is journaled in each ot the brackets 76 and 77 and bear against the outer :tace of the endless hlm 63 to maintain the later in proper position upon the turntable 40.

A pair or brackets like 80 are secured to the lowerV portion 20 and each sup orts a post 84. :Each post 84 is shoulderet at its upper end for the threaded portion 85.

A stationary nlm guide cover. plate 86 partially covers the ilm'63 and has formed therewith the lugs 87, 87 a and 88. The plate is supported upon the shoulders or the posts 84. Nuts 89 in threaded engagement with the threaded portions 85 secure the cover late 86 in place.

llith the lug 87 a there is formed a sleeve 90. A spindle 91 with the head 92 at its lower end is fastened in the sleeve by means oi the pin 93. A guide roller 94 is journaled on the spindle 91,

A lug 96 extends up has secured thereto the U sh-aped film guide loop 98 is formed at the Aupper end of the rod 97. The plane of the endless -film 63 is located around the guide cone 60V and the said film is unwound at its core 100, duringV the operation of the reel. The outgoing portion 63a of the film passes through the guide loop 98, then leads over a guide roller 101. From the latter the portion 63a leads toa picture machine, or other apparatus in which it is to be used. The returning portion 63b of the film 63 passes over the roller 94 and then winds around the periphery of the roll of the film 63.

To operate the device, the driving shafts l49 and54 are turned at the same speed by means not shown. They in turn through the bevel pinion 50, bevel gear 48 and bevel pinion and bevel gear 53, respectively turn the sleeve 36 and the shaft 45. The bevelgear 53 being Smaller than the bevel gear 48, the shaft 45 is turned with a greater speed than the sleeve 36. Consequently, the guide cone rotates with a greater speed than the turntable 40.

By this means the outer po-rtion of the film 63 which has a larger diameter than windings of the film at its core travels more slo-wly than the windings at the core 100. Thereby the tension of the film 63 at its outer and inner windings is equalized, and the film is evenly wound and unwoundduring its operations.

By means of the threaded end 65 of the rod 64, the spring` can be adjusted to different `positions on said rod, and thereby the pressure of the guide rollers A7 8 on the outside Winding ofthe film 63 can be adjusted.

rlhe pressure of the guide rollers 7 8 on the outside winding of the filn163 maintains the said film in eccentric relation to the guide cone 60, with a crescent shaped clearance space M between the core of the film and the said guide cone. The inclinationl of the wall of the guide cone andthe clearance .space M enables the film to male a' turn or twist of 90 degrees in the body thereof, to

l be enabled to rise to aY higher level as it isunwound at its core. kThe film then easily passes through the U-shaped-guide loop 98. l

To direct the film to a higherle^vel in the same-plane in which it is positioned at its core, would permit it to be easily ,broken Having 'described my invention what l desire to secure by Letters Patent and claim 1s Y 1. ln an endless film reel thel combination of airotary turntable for supporting and winding up an endless lmand a rotating guide cone to unwind the film at its core, the said conerotating atV a greater Speed than from the step 23, and" film guide rod 97. A

said turntable to compensate for the difference of diameters of Said film at its core and at its outer windings.v

2. In an endless film reel the combination of a rotating turntable for supporting and winding up an endless film, va ,rotating guide cone at the core of the film to unwind the rate of speed than the turntable, a stationary film guide loop to guide the film as it unwinds at its core and a guide roller bearing against the outer face of the outer winding of the film.

4. ln an endless film reel the combination 5. ln an endless film reel the combination' of a turntable, a guide sleeve supporting and fastened to the turntable, a lange at the upper end of the guide sleeve, a stationary guide sleeve encircling the rst guide sleeve and having a Harige at its upper end, ball bearings between said flanges, a shaft within said first guide sleeve, a guide cone fastened to the upper end of the shaft, ball bearings between the lower face of the guide cone and the upper face of the turntable, means to turn the guide sleeve that carries the turntable and means to rotate the shaft at a greater rate of speed than the turntable. A

6. ln an endless film reel the combination of a base housing with a lower portion and anupper portion, a shaft in the lon 'tudinal axial center of the housing, a gui e cone fastened to the upper end of the shaft, a

stationary guide sleeve with a Bange at .its

of a turntable, a guide` sleeve. supporting and secured to the turntable, a rotating shaftguide cover plate over the turntable to guide a film thereon, a stationary filml guide loQp over the lm and tension guide rollers to bear against the outer face of the outer winding of the lm.

, 7 In an endless film reel the combination ofa base housing with a lower portion and an upper portion, a shaft extendlng into the housing in the axial center thereof, a guide cone fastened to the upper end of the shaft, a stationary guide sleeve with a flange at its upper end secured in the upper. portion of the housing, a rotative guide sleeve having a flange at its upper end between the shaft and stationary sleeve, ball bearings between the two flanges, a turntable carried =on and fastened .to the flange of the rotative sleeve, ball bearings between the turntable and the lower face of the guide cone, a stationary film guide cover over the turntable to guide a film thereon, a pair of tension rollers located to bear on the outside winding of the lm, a stationary film guide loop for the lilma gear fastened to the shaft, a larger gear fastened to the rotative guide sleeve and means to rotate both gears, the smaller gear rotating at a greatel` rate of speed than the larger.

8. In an endless lm reel the combination of a turntable for an endless film, a guide cone at the core of the film coaxial with the turntable, means to rotate the turntable,

means to turn the guide cone, the said film spirally wound around theA ide cone on the turntable during the rotatlon of the reel, means to maintain a clearance space on one side between the guide cone and the core of the film, a guide loop' adjacent tothe guide cone for said film as it unwnds at its core, the guide loop having a pair of arms parallel to the turntable to guide the film to make a turn or twist of 90 Idegrees as it unwinds. at its core.

9. In an endless film reel the combination of a turntable for an endless film, a guide cone at the core of the film coaxial withthe turntable, means to rotate the turntable, means to turn the guide cone, the said film spirally wound around the guide cone on the turntable during the operation of the reel, the said film unwound at its core, ilexible means bearing against the outer windings ofthe film producing on the opposite side a crescent shaped clearance space be.

tween the core of the film' and the guide cone and a 'guide loop adjacent to the guide cone for said film, the guide loop parallel to the turntable to guide the lln to make a turn or twist of 90 degrees as it leaves its core. i

Signed at New York city, in the. countyof New York and State of. New York, this eighth day of September, A. D. 1919.

LYMAN A. WILSON.

Images