US1563183A - Picture-projecting machine - Google Patents

Description

- Nov. 24, 1925.

T. w. f-womwm PICTURE PROJECTING MACHINE Filed M223' 3 M22 2 Sheets-Sheet l Inyenor 11 W Hood Nom, 24 1925n l 1563,183

f T. W. GODWN i PICTURE PROJECTING lMACHINE Filed May 3l. 1922 a Sheets-Shed. 2

Patented Nov. 242-, 1925.

1,563,183 PATENT otros@ THOMAS W. GOODWIN, OF BERKELEY, CALEORNIA, ASSGNR OF ONE-FOURTH TO H. E. MALMSTEN, OF BERKELEY, CALFORNIA.

` PICTURE-PROJECTING MACHINE.

To' all whom it may concern.' ,Y

Be it known that I, TiioMAs W. GOODWIN, a citizen of the United States, residing at Berkeley, county of Alameda, and State of California, have invented. new and useful Improvements in Picture-Projecting Machines, of which the following is a specification.

This invention relates to a picture pro jecting machine and especially to an appa ratus constructed and arranged to automatically and successively project picturesfrom a series of negatives or slides upon a screen, and to repeat and repeat the exhibition as long as the apparatus is in operation.

The object of the present invention is to generally improve and simplify projecting machines of the character described; to provide an elongated cylindrical magazine or holder capable of receiving and supporting a suitable number of` slides; to provide means for intermittently imparting vertical andA rotarymovement to the magazine to successively align the slides with relation to the lens of a projecting machine, and to provide means for rendering the mechanism automatic in operation, and for repeating the exhibition as long as the machine is running. Further objects will hereinafter appear.A

One form which `my invention, may assume is exemplified in the following description and illustrated in the accompanying drawings, in which- Fig. l is a central, vertical', longitudinal section of the projecting machine.

Fig. 2 is a cross section of the same partly broken away.

Referring to the drawings in detail, A

indicates a base member of suitable construction, and vertically disposed with relation to the base and journalled therein is a driving shaft 2. This shaft is driven in one direction, but is intermittently rotated and such rotation is imparted by a pairof gears 3 and Ll and a Geneva movement 5. The continuous `rotor of the Geneva movement which is indicated at 6` is carried by a shaft 7, and this shaft 7 is rotated by a pulley and belt as at 8 which is driven from any suitable source, as an electric `motor or the like not shown. Adapted to `turn in unison with the shaft 2 is a tubular or sleeve-like shaft 9. This shaft'is also vertically movable on the shaft 2 and is accordingly splined Application led May 31, 1922. Serial No. l.

to the shaft as indicated at l0. Supported by the upper end of the sleeve or shaft 9 is a head member 1l, and suitably' secured thereto or formed as an integral part thereof is a cylindrical shaped magazine generally indicated at B. This magazine is rotated in unison with the sleeve shaft 9 and it is also moved vertically in unison with the same and this is accomplished as will hereinafter be described.

The magazine proper is provided for the reception of magic lantern slides, as generally indicated at C. The slides are arranged in vertical and horizontal row formation as shown in Figs. l and 2, and means are emn ployed for successively valigning the slides with the lens of a picture projecting machine, generally indicated at D. Each horizontal row of the magazine contains sixteen slides and each vertical row contains six, and as six times sixteen equals ninety-six, it can be seen that the number of slides contained in the present machine is ninetysi::. rlhis number' may however be increased or decreased as the number of slides employed in the vertical and horizontal rows may be varied to suit the particular purpose of the machine.

The exterior surface of the cylindrical magazine consists of a series of vertical bars l-l: which are tied with relation to each other in any suitable manner to maintain parallelism. The opposite sides of the` bars are grooved, as at 15, and form channels or guides for the reception of the slides C. rPhe head member ll, to which the drunior bars Mare secured, are cut out adjacent the outer edge, as at 1G, and the respective slides may thus be readily grasped when they are being removed or inserted. Any suitable method of supporting and securing the slides may however be employed as this does not form any important feature of the present invention.

rlhe slides, as `previously stated, are arranged in vertical and horizontal row formation and they are successively displayed during the operation of the machine. rfhe magazine is raised and lowered vertically through a step by step movement when the exhibition is going on, and it is also turned horizontally about its longitudinal axis when changing from row to row, that is the pictures in each row are individually exhibited and the magazine wil during this movement move in a vertical direction only. After one row has been completed, the magazine is automatically rotated about its axis until the next row comesA into position and it is again moved vertically until the second row has been completed; the movement of the magazine being in the direction of arrows, a, l), c, d, c, etc. By referring to F ig. 1, it will be seen that the magazine will first lift vertically through a step by step movement, for instance until all of the pictures in the row 18 have been exhibited. It will then turn horizontallyT about its longitudinal axis in the direction `of arrow o until the row 1.9 aligns with the lens D. The magazine will then be lowered vertically through a step by step movement until all the slides in row 19 have been exhibited and a horizontal movement will be imparted in the direction of arrow al until row 2O moves into alignment with the lens, and the cycle of operation will thus be repeated. This movement is transmitted to the magazine in the following manner:

Cut in the exterior surface of the sleeve shaft 9 is a pair of helical grooves as indicated at 21 and 22, one groove having a right hand pitch and the other a left hand pitch. These grooves are connected at their respective ends as at 23 and 2li so as to form a continuous groove. Projecting` into the groove is a shoe 25. This shoes is pivotally supported on a stationary standard 26 and will, due to its stationary position, impart a vertical movement to the sleeve shaft and 'the magazine first in a vertical upward direction and then in a vertical downward direction; this movement being imparted through step by step stages and during the intermittent revolution of the shaft 1() and the sleeve shaft 9. The magazine however is secured against rotary movement in uni son with the shafts 2 and 9, except after the completion of each row of slides, and the rotary movement imparted is therefore intermittent. No positive connection is formed between the upper end of the sleeve shaft 9 and the head ll of the magazine, but a friction drive connection is formed by an inverted collar 2T secured to the drinn, as at 28, a spring 29, a collar 30 and a friction washer 3l, that is a hub 32 on the drum lits loosely over the upper end of the shaft 2 and is turnable with relation thereto, and as this is the case the weight of the drum and the head 1l will be exerted on the fric-V tion washer 3l and the collar 30, which is formed integral with the upper end of the sleeve shaft; this friction being` further increased by the interposition of the spring 29 between the Collar 27 and the collar 3 Thus as the shaft-s 2 and 9 rot-ate, a continuous friction is exerted between the washer 231 and the head .1l to rotate the head i1 anfl the` magazine carried thereby, but such frictional turning movement is prevented by employing a series of vertical guides indicated at S3, that is an arm 3a formed as a part of the stationary standard 26 projects radially against the inner surface of the magazine and here alternately engages the vertical guides 33. These guides are equal in length, asf shown, but they are staggered with relation to each other, thus cacli al ternate guide will present a high end at the upper end and a low end at the opposite end, andvthis staggered or stepslike formation permits alternate engagement of the arm 34 with the guidesand these guides in turn serve the function of securing the drum and magazine against rotation except when a guide 33 moves out of engagement with the arm 311, as will be described.

Any suitable .type of picture projecting machine may be employed and this is pret erably positioned vwithin the drum; the projector being supported by the stationary standard 25 by means of an arm 3. The

projector employed in this instance consists of a lamp 36, a reflector 37, by which the rays of the lamp are concentrated and projected through the slides, and it furthermore consists of a projecting lens D, which is suitably supported exterior' of the maeszine as shown in F 2. During the operation of the machine the slides successively register with the reflector 37 and the lens D and they remain stationary when so istering for a predetermined period. The following slide is then moved into alignment and exhibited, and this operation repeated and repeated as long as the machine is in operation.

In actual operation power is transmitted to shaft by any suitable means or as here indicated by the belt S. The rotor of the Geneva movement will thus be continuously rotated andV an intermittent movement will be transmitted to shaft 5, upon which gear l is secured.. This gear `is intermittently rotated live .steps to complete one revolution and each step or partial revolution of this gear is transmitted to the gear 3 and the shaft 2; the gear ratio being such that for each partial revolution of gear e', one complete revolution will be transmitted to the gear 3 and the'shaft 2. This movement is also transmitted. to the sleeve shaft 9 as it is splined, as at l0, to shaft 2, and the sleeve shaft will consequently rotate one revolution in unison with shaft 2 and then come to a rest period. lt will then again be rotated in unison with shaft 2 through the action of the Geneva movement and gears and el, and this intermittent rotation will continue as long asthe machine is in operation. The pitch of thehelical grooves 21 and 22 is such that one revolution of the shaft 9 will move the sleeve 9 and the magazine B the magazine proper.

nasales vertical height ot one slide, and4 such vertical movement is imparted to the sleeve shaft and the magazine through the medium of the stationary shoe 25. By referring` to Fig. l it will be seen that the shoe 25, together with the projecting reflector and lens D, arepositioned at the upper end oi the magazine and that the magazine in turn has been lowered to its extremelimit7 where it is eX- hiloiting` or projecting the uppermost slide in one of the vertical rows. As this is the case arm 34: will engage one ot the vertical guides 33 and rotary movement of the magazine will be prevented during` `each revolu` tion ot the shafts 2 and 9, thus during' each intermittent rotation, magazine B and sleeve shaft 9 will be raised so that oneslide after another will successively register with the retiecto'rand the projecting` lens l), and this will continue until thelowermost slide is reached, The vertical guide 33 will at this point move out of register with the lower end of the guide and during,` the next revolution of shafts 2 and 9 turning' movement will also be imparted to the head ll and the This turningmovement however, will only he one-sixteenth ot a complete revolution for each oit, the similar sixteen vertical rows of slides. rlhe succeeding guide 38 is lower than the guide which has just moved out ot engagement with the arm. 34e, and this guide will thus engage the arm 34- when one-sixteenth of a revolution has been imparted to the magazine, and turther turning movement will be prevented. rlhe next turning,l movement of the shafts 2 and 9 will thus impart vertical movement to the magazineV and the sleeve shaft and the row which was last brought into alignment with the reflector and the projecting lens will now move downwardly in a vertical di,- re'ction and each slide Ycontained in this row will move into alignmentin successive order.

The' uppermost slide will finallybe reachedV and the upper end oi the guide will then move out ot alignment with the arm and a horizontal turning` movement will be transf mitted to the magazine to the extent et onesixteenth of a revolution. rlhe succeeding vertical guide 33 extends above the one which just moved out ot register with. the arm Bil, and further turning` movement will thus be prevented. This cycle ot operation will bev repeated and repeated and the magazine will continue to intermittently rotate in the direction ot arrow 71, as long as the machine in operation, each step ot the partial rotation amounting` to one-sixteenth ot a revolution as in this instance sixteen vertical rows'ot slides are employed. However it twelve rows are employed, each partial revolution will be one-twelfth ot a revolution, and so on.

lhe joining of the right and lett hand helical grooves indicated at 2l and 22, at

ivhat l claim and desire to secure byliietters the points indicated at 23 and 2l, is ol im-A portance as it automatically reverses -the vertical movement of the magazine and the sleeve shaft 9, and the length oi' the shoe Q5 employed is also of importance as it must he sui'liciently lonp` to straddle theintersecting points of the right and left hand helical grooves indicated at Ll0, that is the shoe must be of such length as to bridge the gaps or intersecting points el() as an interlock might otherwise be produced, and it is furthermore ot importance r that the shoe is pivotally supported as the shoe assumes one incline when the sleevek shaft andV magazine are'travelling upwardly and an opposite inzline when they are travelling downwardly. 'lhe machine illustrated in the present instance is particularly adapted 'for advertising purposes and the. like. lt is entirely automatic inoperationand requires no attention once set in operation, and to either stop or start the same it will only be nec'- essary to open or close the circuit through the motor by which helt 8 is driven. The

slides may conta-in pictures, advertisements,

or whatever may be desired, and these may be readily changed ltrom time to time as any slide in the vertical row may be readily removed and replaced.y y

The mcchanisni employed is exceedingly simple in construction and the apparatus as a whole is small and compact when the number orP slides contained is considered. The amount ot power required to operate the apparatus is small and as no attendant is required, it can readily be seen that the cost ot operation need, hardly be considered.

While certain 'features oi the present invention are more or less specifically illustrated, l wish it understood that various changes in term and proportion may be re sorted to within the scope ot the appended claims, similarly that `the materials and finish ot` the several parts employed may be such the i experience and jud rent ot themanufacturer may dictate various uses may demand.

l-laving thus described. my invention,

Tatent isl. In a picture projectintfg` machine of the character described a vertically disposed shalt, a sleeve shaft splined thereto and vertically movable tlieroon, an elongated cylindrical magazine supported by the sleeve shalt and movable vertically in unison with the same, means tor intermittently rotating` the first named shaift and the sleeve shaft in unison, means for imparting` a ver tical movement to the sleeve shaft and the magazine in unison during` rotation ot the lirst named shalt and the sleeve sha'tt, and

means tor impartingn a partial rotanT movement to the magazine at the end ot a predetermined number ot vert-ical movements.

i) -1 u l) 2. In a picture projecting machine of the character described a vertically disposed shaft, a sleeve shaft splined thereto and vertically movable thereon, an elongated cylindrical magazine supported by the sleeve shaft and movable vertically in unison with the same, means for intermittently rotating the iirst named shaft and the sleeve shaft in unison, means for imparting a predetermined numeer of step by step vertical movements to the sleeve shaft and the magazine both in an upward and in a downward direction, and means actuated by the turning movement of the sleeve shaft and the first named shaft for imparting a partial turning movement to the magazine at the end of each predetermined number of step by step vertical movements.

8. ln a projecting machine of the character described a vertically disposed shaft, a sleeve shaft sm'rounding the same and vertically movable thereon, means for imparting an intermittent rotary movement to the two shaits in unison, a stationary support adjacent the sleeve shaft, a connected right and left hand helical groove formed in the surface of the sleeve shaft, and a member on the support projecting into the helical groove to impart a vertical movement to the sleeve shaft during turning movement thereof.

fl. ln a projecting machine of the character described a vertically disposed shaft, a sleeve shaft surrounding the same and vertically movable thereon, means for imparting an intermittent rotary movement to the two shafts in unison, a stationary support adjacent the sleeve shaft, a connected right and left hand helical groove formed in the surface of the sleeve shaft, a member on the support projecting into the helical groove to impart a vertical movement to the sleeve shaft during turning movement thereof, a cylindrical shaped magazine supported by the sleeve shaft and movable vertically in unison with the same,

a friction drive interposed between the sleeve shaft and the magazine normally tending to rotate the magazine, and means securing the magazine against rotation except after predetermined vertical movement thereof.

5. In a projecting machine of the character described a vertically diposed shaft, a sleeve shaft surrounding the same and vertically movable thereon, means for imparting an intermittent rotary movement to the two shafts in unison, a stationary support adjacent the sleeve shaft, a connected right and left hand helical groove formed in the surface of the sleeve shaft, a member on the support projecting into the helical groove to impart a vertical movement to the sleeve shaft during turning movement thereof, a cylindrical shaped magazine supported by the sleeve shaft and movable vertically in unison with the same, a friction drive interposed between the sleeve shaft and the magazine normally tending to rotate the magazine, a series of vertical guides secured to the magazine, and a stationary arm engageable therewith, said arm normally securing the magazine against rotary movement, and said vertical guides being staggered to permit them to travel into and out of engagement with the statioiiary arm during vertical `moven'ient of the magazine.

(3. ln a machine of the character described the combination with a cylindrical shaped magazine and the means for imparting a vertical upward and downward movement thereto, of a series of vertical guides carried by the magazine, said guides being staggered vertically with relation to each other to present alternate high and low points at their opposite ends, and a stationary arm projecting into the path of said vertical guides and alternately engageable with the respective guides.

THOMAS YV. GOODlVlN.

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