US918884A

US918884A - Moving-picture machine.

Info

Publication number: US918884A
Application number: US45605108A
Authority: US
Inventors: Herbert S Mills
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-10-03
Filing date: 1908-10-03
Publication date: 1909-04-20
Anticipated expiration: 1926-04-20

Description

H. S. MILLS.

MOVING PIGTURE MACHINE;

APPLICATION FILED '001'. a. 1908.

918,884, 7 Patented Apr. 20, 1909.

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HERBERT S. MILLS, OF CHICAGO, ILLINOIS.

MOVING-PICTURE MACHINE Specification of Letters Patent.

Patented April 20, 1909.

Application filed October a, 1903. Serial No. 458,051.

To all whom it may concern:

Be it known that I, HERBERT S. MILLs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Moving-Picture lliachines, of which the following is a specification.

My invention relates to an improvement in the class of moving-picture machines in,

- Fig. 2 is a toplan view of the film-winding device prefera ly employed with the said machine.

The movin picture machine represented is substantial y the same as that shown and described in United States Letters Patent No. 890,936, dated June 16, 1908; and the film-winder is substantially the same as that shown and described in United States Letters Patent No. 887,431, dated May 12, 1908.

The frame 3 of the moving-picture machine is surmounted by a support 4 for a stationary c lindrical casing 5 provided with a tan entia extension 6. In the casing is contra ly pivoted at 7, to occupy a horizontal position, a circular rotary film-carrler'i and about the base of the carrier is formed an internally-toothed rack 9 engaged by 'a pinion 10 for driving the carrier, as iereinafter described. A film 11 in an endless annular coil seats about a circular flange 12 on and concentric with the carrier 8 to cause the coil to rotate therewith,and in rotating to pay out the film from the center of the coil and wind it u on the peripher thereof. Antifriction 'ro lers14 are h1nge( to the outer ends of the arms of a stationary spider 13 on the casing, to extend radially across the top of the horizontal film-coil and bear against it for holding it down; and one of these rollers carries adJustabl on'an extension 15 of its outer end-a weig t 16 for varying the pressure of the base of the coil against the upper surface of the carrier to bind the convolutions with more or less friction thereto, so that the coil may 1pay out as rapidly as the carrier rotates or ess rapidly, according to requirement of the moving-picture machine. The film passes from the center of the coil about an inclined guide-roller 17 and about a guide-roller 18, and back to the peri hery of the coil over an inclined guide-r01 er 19 after having traversed the mechanism on the frame 3, being paid out from the center of the coil by rotation of the carrier under the driving action of the pinion 10 which is geared to the film-feeding mechanism on said rame, as indicated in Fig. 1. From the roller 18 the film is fed and guided back to the carrier 3 by the mechani n on the frame 3 which is shown and described in detail in said Patent No. 890,936, the same being driven by a master-gear 20 on the frame, geared to an electric motor 21 to feed the film from a loop 22 formed therein pasta ate, indicated at 23 in Fig. 1, for clamping tfi and across the light-admittin end of a lensbarrel 24 on the frarrie 3, the condensing lenses of which are represented at 25 and 26 on said fi re. The feeding of the film across the lens-barrel is effected intermittently, as required in a moving-picture machine, by the ordina or any suitable Geneva-gear movement li iot shown), that illustrated and described in said Patent No, 890,936 being preferred.

The parts of the machine thus far referred to and described need present no features of novelty.

Following is a description of my improvements in the moving-picture machine.

The circuitmay be traced in Fig. 1 throu h a wire w leading from the positive ole o a generator, represented conventiona y at A, through an automatic cut-out B and thence through Wire w to an ordinary hand-operated switch 0, thence through wires 10 ,10 to one terminal, 1), of the motor 21 andback to the oth r motor terminal, a, throu h Wires w, w, and an incandescent electric amp, represented at 27, in line with the aforesaid lenses; and a wire to leads from the lastmamed motorterminal'to the opposite ole of the generstar. A branch-circuit is ormed with a wire to leading from the cut-out B and a branche edges of the film,

- open the circuit to chine in the event of breaking of the traveling film and in the event of stoppage in the feed of the film.

The automatic cut-out B, which may be of any suitable or known construction, con

sists, as shown, of an'electro-magnet 28 supported on an insulated bracket 29 carrying a swinging armature 30 normally engaging, by gravity, with the upper free end of a springressed blade 31 pivotally supported at its ower end, the weight of the armature normally holding the blade in upright position against turning under the tendency of its controlling spring to break the connection made by it in the wires w and w and thus cut out the motor and stop the machine. For restoring the circuit at that point, the blade 31 carries an arm 32 with which is connected an upright rod 33 extending into a position of convenient access for pulling it upward to turn the blade back into engagement with the armature. The freeing of the blade for opening the circuit is occasioned by attraction of the armature when the magnet is energized.

At D is represented an automatic switch on an insulating support 34. It comprises a contact-finger 35 with which the wire 10 is connected, and a rigid metal arm 36 with which the wire w is connected, said arm carrying pivotally upon it a bell-crank 37 having a contact-finger 38 extending from its shorter arm belcw and coincident with the finger 35 and provided with an adjustable weight 39 and the longer arm of the'bell-crank has a finger '40 of inverted-L shape extending from its free end into the path of the film 11 in its course back to the film-carrier to form a filmbearing. The film passes under the finger 40 which bears against it to resist the tendency of the weight to turn the bell-crank in the direction to contact the finger 38 with the finger 35 and close the branch-circuit, which is maintained normally open at the switch D by the separation of the contact fingers. S ould the film break and thus fail to continue to prop the finger 40, the weight 39, which overbalances the longer bell-crank arm, will turn the bell-crank and contact the finger 38 with the finger 35, thereby closing the branch-circuit and energizing the magnet 28 to attract its armature. Such attraction of the armature releases the blade 31 to permit turn ng thereof by its spring to open the motor-circuit, with the effect of cutting out the motor and stopping it and the result of stopplmg the machine and that of extinguishmg t 0 amp. When the film is mended, its

engagement with the finger 40 opens the' branch-circuit, and the motor-circuit may be restored by raisin the blade 31 to normal position through t e medium of the rod 33. A somewhat similar automatic switch is provided at E, near the point where the film leaves the carrier. This switch operatesto where the with that finger to out out the motor in the event of stoppage in the feed of the film by stripping of its edgeperforations or from other cause. It comprises an insulating support 134 on which is fastened a pair of contact-fingers 135 and 235 in vertical alinement with each other, a rigid metalarm 136 extending from the support and having pivotally secured in its outer end a bell-crank 137 with a contact-finger 138 extending from its shorter arm between the fingers 135 and 235 and carrying an adjustable poising-weight 139, and a fork 140 on the free end of its longer arm in the path of the film, this fork having two parallel fingers and a deflected intermediate branch-finger 240.

The. wire @12 is connected with the fingers 135 and 235 and the wire w is connected with the arm 136. The weight 139 is adjusted to normally balance the arms of the bell-crank and normally maintain the contact-finger 138 separated from the contact-fingers 135 and 235. The film passes from the roller 18 under a spring pressed tautening device, represented at 41 1n Fig. 1, and is engaged by it, and it passes thence through the fork 140 without bearing against any of the fingers forming it; and the loop-section 22 also.

passes through the fork beneath the finger 240 thereof but without bearing against any of the fork-forming fingers.

Should the traveling film become caught against continuing to pay out from the coil,

the strain of the cont1nued operation of the feeding mechanism of the machine will straighten the film at the section thereof tautening-device 41 engages it, thus against the resistance of the latter, and in so straightening the film will engage with the up ermost ofthe two arallel fingers of the for 140 and tilt the be -crank 137 in the direction to cause the contact-finger 138to encounter the contact-finger 235, thereby closing the branch-circuit to energize the magnet 28 and open the motor-circuit in the same way andwith the same results asdescribed in explaining the action of the device D. Like results ensue in the event of stoppage of the film as by its edge-perforations ecoming impaired or stripped where it asses about a feed-roller just behind the 00p 22. Then'the continued operation of the feeding-mechanism would draw the loop against the lowermost of the two parallel fork-fingers to cause the strain thereon to turn the bell-crank in the direction to engage .the contact-finger 138 with the contact-finger 135. If the cause of stopping the travel of the film, such as stripping or impairing its edge-perforations, occur adjg'cent and beyond the lower end of the clamping-gate, the continued feed above the gate will expand the loop 22 thereby backing it up against the fork-finger 240 and causing its engagement turn the bell-crank 137 in the direction to effect closure of the branchcircuit and opening of the motor-circuit, as described, by engagement of the contactfin er 138 with the contact-finger 235.

vhat I claim as new and desire to secure by Letters Patent is In a moving-picture machine employing a traveling picture-film, the combination with film-feeding mechanism, of an electric circuit, an electric motor and an automatic cutout therefor in said circuit, said motor being geared to said mechanism to operate it,'a branch of said circuit connected with said cut-out, a switch-device in said branch-circuit comprising a pair of alining contactfingers on an insulated support, a pivotal bell-crank 011 said support having on one arm a contact-finger extending between said alining fingers and on its other arm a fork formed with a pair of parallel fingers and an intermediate deflected finger, the space between said parallel fingers being traversed by a straight section of said film and a loopsection in the film extending beneath said deflected finger, and a film-tautcning device bearing upon the film, substantially as and for the purpose set forth.

HERBERT S. MlLLS.