US828790A

US828790A - Picture-slide controller for stereopticons.

Info

Publication number: US828790A
Application number: US30894206A
Authority: US
Inventors: Arthur K Wait
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-03-30
Filing date: 1906-03-30
Publication date: 1906-08-14
Anticipated expiration: 1923-08-14

Description

PATENTED AUG. 14, 1906.

A. K. WAIT. PICTURE SLIDE CONTROLLER FOR STEREOPTIGONS.

APPLICATION ,IILED MAK.30,1906.

2 SHEETSSHEET 1.

[NVENTOR A TTORNE Y5 W1 TNESSES:

No. 828,790. PATENTED'AUG. '14, 1906.

A. K. WAIT. PICTURE SLIDE CONTROLLER FOR STERBOPTIOONS.

APPLICATION FILED MAR. 30.1906.

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Specification of Letters Patent.

Patented Aug. 14, 1906.

Application filed March 30.1906. Serial No. 308,942.

To a]! whom, it nmy concern:

Be it known that I, ARTHUR K. WAIT, a citizen of the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented anew and useful Picture-Slide Controller for Stereopticons, of which the following is a specification.

This invention is an attachment for stereopticons and the like, and has for its object to rovide for bringingh picture-slides into and out of the path of lig. t without manually handling each and every slide, thereby to facilitate the manipulation of the stereopticon and to make the change of plates rapidly or slowly, as may be desired.

In order that the attachment may occupy as small a space as possible, it is proposed to have the attachment include a rotary drum or slide-holder with the slides radially carried thereby and capable of being withdrawn from the carrier into the path of light and then returned into the carrier while a stepby-step rotary movement is being imparted to the carrier, so as to bring the successive lates into position for movement into and out of the path oflight It is a further object of the invention to adapt the attachment for use in connection with any conventional form of stereopticon or picture-exhibitor Wit/b01113 altering or changing the same in any material manner whatsoever.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully descrlbed, shown in the accompanying drawings, and particularly pointed out in the appended c aims, it being understood that changes in the form pro ortion, size, and minor details may be ma e within the scope' of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure l'is a side elevation of a conventional form of stereopticon equipped with the slide-controlling attachment of the present invention. Fig. 2 is a plan view with the slide-carrier removed. Fig. 3 is a plan view of the slide-carrier. Fig. 4 is a sectional view on the line 4 4 of Fig. Fig. on an enlarged detail sectional view on the line 5 5 of Fig. 4.

Like characters of reference designate corresponding parts in all of the figures \of the drawings.

For the adequate understanding of the application and operation of the present inven tion a conventional form of stereopticon or picture-exhibitor has been shown in the accompanying drawings, including a light-box or lantern 1, mounted upon a suitable base 2 and provided with the usual condensing-lens tubular frame 3. In front of the condensinglens tube there is the usual magnifying-lens tube 4, connected to the front end of a bellows 5, the rear end of which is carried by a stationary upright frame 6, while its front end and the lens-tube 5 are carried by an upright adjustable frame '7, movable toward and away from the frame 6. A gage-rod 8 extends. rearwardly from the frame 7 and passes throu h guides 9 and 10 upon the ame 6 and t e lantern 1, there bein a suitable set-screw 11, carried by the guide 9', for engagement with the rod 8, so as to fix'the frame 7 whenit has been properly adjusted according to the distance between the stere opticon andthe screen upon which the pictures are to be cast. These parts are common and well known and of themselves form no art of the present invention.

11 carrying out the present invention there is provided a rotary picture-slide carrier, preferably in the nature of a drum, including spaced heads 12 and 13, carried by a shaft 14, having each end supported in a suitable bracket 15, rising from the bed or base 2. In the inner face of each head there is a series of radial grooves or guideways 16, which are open at their outer ends and are closed at their inner ends by suitable shoulders 17. It will of course be understood that the grooves or guideways of the two heads are in alinement in order that each pair of corresponding grooves may receive a picture-slide which is supportedupon the shoulders 17. and is capable of being moved outwardly through the open outer ends of the grooves. This pic ture-slide carrier is mounted above tlie'condensing-lens of the stereopticon in such position that when each pair of guideways is brought into a vertical osition at the lower side of the carrier sai guideways will be alined with the space between the condensing'lens and the magnifying-lens, whereby the picture-slide in said grooves may be lowered into the path of light and then returned into the same air of grooves after the desired exposure as been made.

For the sup ort of the slides during the lower half of t e path of their rotary movement there is.

elements 18 and 19 in the nature of arcuate stri s or plates embracing the lower periphera portions of the drums between the heads 12 and 13. The inner end portions of the members 18 and 19 are connected to a suitable rectangular bracket 20, which is in turn carried by the standards 15, so as to support the guard members 18 and 19 independently of any portion of the stereopticon. The inner or lower ends of the guards have the respective downturned lips 21 and 22, which are spaced at a suitable interval, so as to guide a plate downwardly from the carrier Into the space between t e condensing and magn' g lenses.

With the slide-carrier rotating in the direction of'the arrow in Fig. 1 of the drawings the uard member 18 supports those slides Whic are approaching a vertical position, and when the slides come into alinement with .the space between the two guards they drop downwardly, and after they have been returned into the carrier the guard 19 su ports them until they pass into the upper l ialf of their rotary path.

For the purpose of supporting each slide in the path oflight and also for returning the slide into the carrier a cross-head 23 is mounted to slide vertically in front of the condensinglens and is provided at each end with a pro jection or trunnion 24, working in a longitudinal slot in the front free end of a verticallyswinging lever 25, fulcrumed adjacent its rear end upon a suitable bracket 26, rising from the bed or base 2. The levers or arms 25 he at opposite sides of the lantern 1 and are simultaneously operated to raise and lower the cross-head, the downward movement ofthe latter being limited by means of bars 27 ,applied to opposite sides of the lantern and extending between the latter and the fixed frame 6. A

The means for operating the levers 25 consis'ts of a substantially horizontal rock-bar 28, mounted at each end in a suitable bearing-bracket 29, rising from the base 2 and provided with a pair ofcams or tappet pro- JGOtiOIlS 30, .dis osed for simultaneous engagement with t e rear extremities of the levers 25. This rock-bar is adapted to be driven by hand or by power, a crank-handle 31 having been shown in Figs. 1 and 2 as an appropriate means for operating the rock-bar. A step-by-step rotary movement is imparted to the picture-slide carrier by means of a lever 32, fulcrumed intermediate of its ends upon a bearing-bracket 33, rising from the base 2, the rear free end of the lever having a downwardly-extending heel 34 for engagement by a cam or tappet 35, carried by the rock-bar .28. The front end of the lever 32 is provided witha pivotal do 36, cooperatingwitli a series of ratchet-teeth 37, provided upon the head 12 of the 'itureeelide carrier.

provided a pair of supporting I or tappets 30 engage the levers 25, and thereby hit the cross-head 23 and the slide A until the latter has been moved back into the car rier. Before the cams 3O disengage the levers 25 the cam 35 engages theheel 34 of the lever 32, and thereby imparts a rotary movement to the move the slide A from the cross-head to the guard 19, so as to be supported thereby when the crossehead descends. The several parts of the attachment are so proportioned that when the cam 35 disengages the lever 32 and the rotary movement of the carrier is thus stopped the cams '30 will then disengage the levers 25, and thus permit the cross-head to descend with the next in rear slide supported thereon. The length of time for any exposure may be governed by the manipulation of the shaft 28, and the picture-slides will be brought into the path of light and then re-/ turned into the carrier in a prompt and posi tive manner without manually handling the individual slides, thereby materially facilitating the handling of the apparatus.

Having thus described the invention, what is claimed is 1. In an apparatus of the class described, the combination of a rotary carrier having radial guideways provided with open outer ends for the reception of picture-slides, a guard embracing the open outer ends of the guideways to retain the picture-slides therein. and provided with an opening with which the guideways are adapted to successively regis ter for the outward movement of the slides through the opening, an annular series of ratchet-teeth for the carrier. a lever having a dog associated with the ratchetteeth, a swinging arm carrying a cross-head alined with the o ening in the uard and working toward and away from tlie same, and a rotary shaft having a plurality of -cams adapted to engage and operate the lever and the arm.

2. The combination with a stereopticon, of a rotary picture-slide carrier mounted. above the stereopticon and provided with radial guideways open at their outer ends for the reception of picture-slides, said, carrier having ratchet-teeth, a guard embracing the lower side of the carrier to retain the pictureslides in the ing in alinement with the picture-slide guide of the stereopticon and with which the guideways are adapted to successively register for the discharge of the picture-slides, a picture slide support working in the picture-guide oi the stereoptieon, pivotal arms mounted at opposite sides ofathe stereopticon and con nectedto the picture-slide support, a lever M picture-carrier sufficiently to.

guideways and having an open:

having a dog to engage the teeth of the picture-carrier, and a shaft having a crank-handle at one end and a plurality of cams adapted to engage the pivotal arms and the lever at ilitl'erent times for operating the same.

3. The combination of a stereopticon having a vertical slotadjacent the forward end thereof, a rotary picture-slide carrierrnounted above the stereopticon and provided with radial grooves, said carrier having ratchetteeth, a pair of parallel pivotal arms extending along opposite sides of the stereopticon and having longitudinal slots in their forward ends, a cross-head extending through the vertical slot in the stereopticon and having trunnions engaging the longitudinal slots of the pivotal arms, uprights for supporting ported adjacent the rear ends of the the pivotal arms, an independent lever having a dog to engage the ratchet-teeth of the picture-carrier, an upright for supsaid independent lever, a shaft supivotal arms and independent lever, said sha t having a pair of cams for operating the pivotal arms, and a separate cam for o erating the independent lever, and acran -handle for said shaft.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two witnesses.

- ARTHUR WAIT.

rotary porting Witnesses:

W. THOMAS, W. O. ALLEN.