US1361143A - Attachment for motion-picture machines - Google Patents

Description

D. D. DANIEL.

ATTACHMENT FOR MOTION PICTURE MACHINES.

APPLICATION FILED sun. 18, 1919.

1,361,143. Patented Dec. 7, 1920.

3 SHEETS-SHEET I.

awuwm D. D DANIEL.

ATTACHMENT FOR MOTION PICTURE MACHINES. APPLICATION FILED SEP|.18, leis.

1,361, 143. Patented Dec. 7, 1920.

3 SHEETS-SHEET 2- ma/wtoz l7 Z7 17am?! D. D DANIEL.

ATTACHMENT FOR MOTION PICIURE MACHINES. APFLICAI'ION FILED SEPI. :8, 1919.

1,361,143. Patented Dec. 7, 1920.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE,

DOSSEY D. DANIEL, OF RICHMOND, VIRGINIA.

Specification of Letters Patent.

ATTACHMENT FOR MOTION-PICTURE MACHINES.

Patented Dec. 7, 1920.

v Application filed September 18, 1919. Serial No. 324,634.

To all whom it may concern.

Be it known that I, DOSSEY D. DANIEL, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Im rovements in Attachments for Motionicture Machines, of which the following is a specification; reference being bad to the accompanying drawhis invention relates to attachments for motion picture machines and primarily it is an object of the invention to improve upon the structure particularly disclosed in my prior Patent No. 1,168,607, granted January A further object of the invention is to provide a novel and improved attachment of this general character adapted for use in connection with a moving picture machine in which an electric motor is the power employed for driving the mechanism, and wherein the attachment is provided with -means whereby the machine is entirely safe cally operates to break the supply or'feed circuit for the machine to both stop the motor and shut off the light in the event of any pronounced irregularity in the travel of the film, such as breakage or the like, or upon derangement of the driving connection from the motor;

An additional object of the invention is to provide a novel and improved attachment of this general character wherein a controlling switch is interposed in the main leads for the electrical system of the picture machine, and wherein said main switch can be readily moved into closed position under the influence of a subsidiary circuit, and wherein the fire shutter of the machine will be automatically moved to closed position and the operating motor automatically stopped upon irregularity in the travel .of the film or upon derangement of the driving connection between the motor and the machine.

The invention consists in the details of construction and in the combination and ture machine with my improved attachment arrangement of the several parts of my improved attachments for motion picture machines whereby certain important advan, tages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to depanying drawings, wherein:

Figure 1 is a schematic view illustrating an attachment constructed in accordance with an embodiment of my invention;

scribe the same with reference to the accom- Fig. 2 is a fragmentary view in side elevation of a conventional type of moving pic;

as herein embodied applied thereto;

Fig. 3 is a fragmentary view in elevation of the fire shutter and the operating means I therefor, as herein included, a second position of the shutter being indicated by dotted lines;

Fig. 4 is an'enlarged fragmentary view in elevation illustratingthe circuit breaker as improved in my attachment, as herein disclosed, the driving belt from the motor being indicated by the dotted lines;

Fig. 5 is a view in top plan of the structure illustrated in full lines in Fig. 4;

Fig. 6 is a fragmentary view partly in top plan and partly insection, illustrating in detail the mounting of the independently operable controlling members for the circuit breaker;

Fig. 7 is a sectional View taken substantially on the line 7-7 of Fig. 5, and.

Fig. 8 is a'fragmentary'view in perspective of the movable contact comprised in the circuit breaker, as herein disclosed.

In the schematic illustration of my invention as afforded by Fig. '1, (1' denotes conductors leading from a suitable source of electrical energy, and preferablyfromthe circuit of the house or place of exhibition. The leads a are operatively connected with a two pole switch S, of a conventional type, and which coacts in a convenient manner with. the stationary contacts 1.

M denotes the motor for driving in a well known manner the mechanism of a moving picture machine, and preferably through a belt connection indicated at 2in Fig. 4. The motor M is electricallyconnected with the the present embodiment of my invention is held in a position below the rays emitted from the nozzle N, so that no obstruction or hindrance will be offered thereto. The arm 2 has operatively engaged therewith, pref erably through the medium of the .elongation 3, the armature or core 4, comprised in the electromagnct a.

The magnet 5 is in electrical connection with the conductor a through the conductor (Z, also in proper electrical connection with the magnet 5 is a conductor 6 leading to the movable contact 6 comprised in the circuit breaker to be hereinafter more particularly referred to.

The stationary contact 7 has leading therefrom a conductor f with electricalconnection with conductor 6 hereinbefore re ferred to.

In view of the foregoing it will be noted that when the motor circuit is closed through the conductors b and c, a circuit will also be closed through the conductors (I, e and f when the contacts 6 and 7 are in engagement, so that the magnet 5 will be energized andthe armature moved to a position to swing the arm 2 to arrange the fire shutter 1* in the desired position out of alinement with the rays of light emitted from the nozzle N.

8 denotes a second electromagnet having its core or armature 9 operatively engaged with the switch S, and said electromagnet 8 is interposed in a conductor or lead y connecting the conductor a and the conductor 6, so that when the circuit is closed through the contacts 6 and 7 the switch S will be held in its closed position.

Interposed in the conductor g is a switch 10, preferably a push button, whereby the circuit which is initially closed through the contacts 6 and 7 may be broken at the will of the operator.

Leading from the second conductor a to the conductor 9 is a lead or conductor i having interposed therein a switch 11, prefer ably a push button, and which, when the switch S is in open position, is adapted to be closed, in order to create the desired circuit through the conductors 2' and g to momentarily energize the electromagnet 8, so that the switch S will be moved into closed position. It is to be understood that after the switch S has been moved into closed position by closing of the switch 11, said switch S will be further maintained in closed position through the circuit passing through the contacts 6 and '7.

Should the circuit through the contacts 6 and T be broken, and particularly by movement of the contact (3 into open position, the switch Swill automatically be moved into open position by gravity, or by a suitably positioned spring 12, preferably the latter.

It will also be understood that when the circuit is broken through the contacts 6 and T the fire shutter F will move into a position directly between the nozzle X and the lens L, so that ignition of the film is prevented.

l uder normal condition, during the-operation of the machine, the circuit is closed through the contacts (5 and 7, but in the event of any irregularities in the travel of the film, such as breakage, undue slackage or tension, or from other causes, the movable contact 6 will be thrown into open position through a mechanism to be hereinafter described. The mechanism to be described also includes a means whereby the movable contact 6 will be thrown into open position upon derangement of the driving connection between the motor and the mechanism of the machine, and more particularly upon breaking or jumping off of the belt 2, which is now generally employed in moving picture machines now in use.

As is particularly illustrated in Fig. 3, the arm 2 of the fire shutter is supported intermediate its length for vertical swinging movement by the upper end portion of a vertically disposed post 14, suitably mounted upon the base of the machine, although I do not wish to be understood as limiting myself in this respect.

I also find it of advantage to employ in connection with the arm 2 a tractile member 15, herein disclosed, as a coil spring, which operates to further facilitate the mov: ing of the fire shutter F into Working position in the event of the circuit being broken through contacts 6 and 7.

As is illustrated in Fig. 2 the switch S is suitably supported by the frame or base of the picture machine, although it can be located as bestmeets the occasions of practice, and said switch is provided with a handle 16, so that said switch may be manually thrown into open or closed position, as may be required.

As is particularly illustrated in Figs. 4 to 7, the stationary contact 7 is carried by an insulating block 17, suitably aflixed to an arm 18, depending from an upstanding wing or flange 19. The wing or flange 19 is carried by a plate 20. which is adapted to ,be suitably anchored upon the base of the machine. Pivotally engaged with the wing or upwardly, with ries the movable contact I.

from the arm,l8 and 21 has affixed thereto an insulating block 22,j which' car- The pivoted 'end port onof is provided with an extens1on 23, preferablyg at right angles thereto, and

ing 1 down upon th ably arranged spring 24., The spr1ng124 op? contacts" 6 to close the lcircuit'l crates to normally maintain the and 7 in engagement,

therethrough'.

The plate 201s piovided' with:

and said w ngs or flanges 19 -andw25 rotatiively support a tubi'ilar' 'shaft 26.'=-An end portion ofthe shaft 26 is provided with a cam member 27, which underlies the extension 23,..sov that upon'rotation of the shaft 26 in one direc tion the cam 27 operates toswing theextension 23 upwardly and the-contact 6 in a direction away from the contact 7, so that the standing wing or flange 2:),

be broken. I

Extending through the tubular shaft 26 is a second shaft 28,-which is also provided with a cam29 underlying theextension so that upon rotation of the shaft 28in one direction the cam 29 will also swing the eX- tension 23 upwardlysan'd 'therebymove the contact 6 out of engagement with the contact 7 to break thecircuit through said contacts. Suitably affixed to the shaft .26 is an arm 30 provided with aroller 31 which is disposed' within the loop of :the film 32. event the filmshould: stopfrom any cause. the slack 'will be substantially, instantly arawnout of the film and the latter will engage the rollei great force, and-instantlyswing thearm 30 carried by the 6 and 7 and thereby constantly beare extension 23 is a su t- 131'. with jcomparati vely thezresult; that the cam 27 v shaft 26 ;will raise theex tension 23 and thereby separate the contacts break: the (llllllit therccircuitthrough'said: contacts 6 and 7 will i shelf 35.

.The arm ingstop pins 46v carried by the bearing 43, so that the arm undue or unnecessary swinging movement. in the i 1 given when the provided with a pair of. upstanding and. alined bearings 36, in'which is rotativel mounted a stub shaft 37. This stub sha t 37' is also-provided with a cam 38 underlying the extension'23 of the arm 21, so that upon rotation'of the shaft BTinone direction the'c'am 38 will operate toswing the extension 23' upwardly-and thereby, separate the f contacts 6 and-7 to-break the circuit. therethrough '-The-stub shaft 37 is also pros vid'ed with an upstandingrock. arm 39; to which is pivotally engaged anv end portion of'a '-link' 40. The opposite end portion of the link e0 is pivotally engaged with an up;

standing rock arm 41 carried by; atsecond stub' shaft 42. The second-stub shaft 42 is rotati'vely engaged with a bearing 43 car: ried' by an extension 44; of the,. table. or

Secured 'to and extending outwardly from the stub shaft 42 is ancelongated rockarm 45 provided atits outer end portion witha roller 46, which lies upon a stretch of the drivingbelt 2, which is inoperative connection with the motorM.x Should the belt become broken orotherwise derangedthe arm 45 will drop, resulting in sufficient rotation of the'stub shaft'37 to cause the cam 38 carried thereby to swing the extension 23 pwardlyand'thereby break the circuit bethe contacts 6 and 7.

45 travels between tween v I Y.

the outstand- 45 is prevented from having In orderthat a suitable alarm may be switch S is automatically fjnikn ed into open position I find it of advanithrou hj l 'ion breakin of this circuit'the" switch S will"-auto'matically assume an open position,

so thatthe fire'yshutter will move into working position and the motor M. will he shaft- 28 has affixed thereto an, arm 33 carrying a roller 34, which engagest 32. The roller 34 lies on the film 32, so that in the event of the film breaking or becoming unduly slack the arm 33 will drop and thereby rock the shaft 28 in a direction to cause the cam 29 to, move the extension 23 upwardly to separate or open the contacts 6 and 7,

The wing .or flange 19, in the present em bodiment of my invention also extends below the plate 20, and the lower portion of said wing or flange 1.) is provided with the outsubstantiallv horizontally disstanding and posed table or shelf 35. This table or shelf "tage to employ a posed therein an audible signal 47, ably a bell, and a'visual signal l8, pore includes the stationary crate, the same may he film having interprefer-. I erably" The circuit. In is normallyopeiuand spaced contact -19. The circuit is closed through the contacts 49 when theswitcli S is in open position bythe contact 50 carried by said switch S. 1

Talso' find it of advantage to inter-pose in thejcircuit 7c the circuit closer- 51 adapted to be manu'allyoperated, so that when it is not desired to have the local circuit 7i;'-;op-,-.= be conveniently broken I From the foregoing description. it is thoughtto be obviousthat an attachment local circuit 7.:

a la mp;

for motion picture machines constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility be assembledgind operated, and it will also beobvious that my invention is susceptible of some change and modificationovithout departing from the principles and spirit there of and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts hereln shown in carrying out my inwith which it may,

vention in practice except as hereinafter claimed.

I claim:

1. In a moving picture apparatus, the combination with a motor circuit;- of a switch interposed in the motor circuit and tending normally to move into open position, a shunt circuit leading from the motor circuit, a normally closed circuit breaker interposed in the shunt circuit, an electromagnet interposed in a branch of the shunt circuit and coacting with the switch to maintain the switch in closed position during the period the motor circuit is closed, a second shunt circuit leading from a branch of the motor circuit to a branch of the first named shunt circuit, an electro-magnet interposed in said second shunt circuit, and a fire shutter operatively engaged with said last named electro-magnet, said electro-magnet, during the period the motor circuit is closed, operating to maintain the fire shutter in open position.

2. An attachment for a motor driven motion picture machine including a switch controlling the motor circuit, said switch tending normally to move into open circuit po sition, a shunt circuit coacting with the motor circuit, one branch of the shunt circuit being in communication with a branch of the motor circuit in advance of the switch, the second branch of'the shunt circuit being in connection with the motor circuit inwardly of the switch, an electro-magnet interposed in the first named branch of the shunt circuit and coacting with the switch to maintain the switch in closed position during the period the motor circuit is closed, a circuit breaker interposed in the shunt circuit, said circuit breaker comprising two relatively movable contact members, means for normally maintaining the contact members in engagement to closethe shunt circuit and energize the electro-magnet to maintain the motor circuit closed, and means cooperating with the driving connection with the motor and automatically separating the contact members of the circuit breaker upon derangement of the driving connection with the motor.

3. An attachment for a motor driven mo.- tion picture machine including a switch controlling the motor circuit, said switch tending normally to move into open" circuit position, a shunt circuit coacting with the motor circuit, one branch of the shunt circuit being in communication with a branch of the motor circuit in advance of the switch, the second branch of the shunt circuit being in connection with the motor circuit inwardly of the switch, an electro-magnet in terposed in the first named branch of the shunt circuit and coacting with theswitch to maintain the switch in closed position during the period the motor circuit is closed, a circuit breaker interposed in the shunt circuit, said circuit breaker comprising two relatively movable contact members normally in engagement to close the circuit, movable members mounted for actuation upon the stopping or breaking of thefilm, each of said members upon such actuation operating to separate the contact members of the circuit breaker.

4. An attachment for a motor driven motion picture machine including a switch controlling the motor circuit, said switch tending normally to move into open circuit position, a shunt circuit coacting with the motor 80 in communication with a branch of the mocircuit, one branch of the shunt circuit being tor circuit in advance of the switch, the second branch of the shunt circuit being in connection with the motor circuit inwardly of the switch, an elect-ro-magnet interposed in the first named branch of the shunt circuit and coacting with the switch to maintain the switch in closed position during the period. the motor circuit is closed, a circuit breaker interposed in the shunt circuit, said circuit breaker comprising two relatively movable contact members normally in engagement to close the circuit, movable memhers mounted for actuation upon the stopping or breaking of the film, each of said members, upon such actuation, operating to separate the contact members-of the circuit breaker, and an additional movable member mounted for actuation upon de 'angement of the driving connection between the motor and the mechanism, said last named member, upon such actuation, also operating to separate the contact members of the circuit breaker.

-In testimony whereof I hereunto afiix my signature.

DOSSEY D. DANIEL.

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