US1227507A - Stereopticon. - Google Patents

Description

Patented May 22, 1917.

2 SHEETSSHEET 1.

J/Ze under /Z- A. F. VICTOR.

STEREOPTICON.

APPLICATION FlLED EB. 26, 1914.

J xi NM NM A. F. VICTOR.

STEREOPTICON.

APPLICATION man FEB. 26. 1914.

LQQ'Y QOYW Patented May 22,1912. I

2 SHEETS-SHEET 2.

@mum llllllllllllllllll I ALEXANDER FERDINAND VICTOR, 0F DAVENPORT, IOWA, ASSIGNOR TO VICTOR ANIMATOGRAPH COMPANY, 015 DAVENPORT, IOWA, A CORPORATION OF IOWA.

STEREOPTICON.

Specification of Letters Patent.

Patented May 22, 1121?.

Application filed February 26, 1914. Serial No. 821,121.

To all whom it may concern:

Be it known that I, ALEXANDER FERDI- NAND VICTOR, a subject of the King of Sweden, having declared my intention of becoming a citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa, have -invented new and useful Improvements in Stereopticons, of which the following is a full, clear, and exact description.

My invention relates to improvements in stereopticons, and particularly to stereopticons of the type set forth in Letters Patent of the United States, granted to me May 27 1913, Number 1,062,622.

The object of my invention is, principally, to so construct the same that it can be reduced in size and made very compact without detracting from its value and efliciency as a high grade apparatus. secondarily, 1t is the object of my invention to support the entire apparatus on a-single standard; to so unite the slide-holder, condensing-lenses and projecting lens that they can be separated as a unit from the rest of the apparatus without disturbing their relation, and it is also one of the objects of the invention to attach the means for supporting the condensing lenses to the slide-holder and have it project back into the housing so that it will not come in contact therewith so as to permit better ventilation; and it is another object to provide a tubular supportfor the projecting lens, and to yieldingly attach said tubular support to the slide-holder so that it may be utilized to clamp the slide in any position to which it may be adjusted. These and other objects and advantages I accomplish by the means hereinafter fully described and as particularly pointed out in the claims.

In the drawings:

Figure 1 is a longitudinal section of my improved stereopticon.

Fig. 2 is a transverse section taken on dotted line 22, of Fig. 1.

Fig. 3 is a rear end view ofthe said stereopticon with its base broken away.

Fig. 4: is a side view of the tubular support of the projecting lens, the slide-holder and support for the condensing lenses removed from the apparatus.

Fig. 5 is a detail view showing a fragment of the rear end of the casing of the stereopticon in section.

Fig. 6 is a transverse section taken on dotted. line 66, Fig. 1, looking in the direction indicated by the drawings.

The base and standard A of my invention is substantially the same as that illustrated and described in my aforesaid Letters Patent. The saddle a is also substantially the same, but a vertically disposed integral circular frame B is supported by said saddle instead of a pillow, as in said patented stereopticon. The forward edge of this circular frame B has an inwardly projecting circumferential flange C, and the inner circumference of this flange has a rabbeted seat 0 in which the edge of the annulus 9 of the slide-holder elements is seated and secured by suitable screws, as will hereinafter more fully appear.

A cylindrical housing for the arc-lamp used in connection with my improvements is built up back of and is supported by this circular frame B, which comprises an outer cylindrical sheet metal shell 2, the forward end portion of which is secured concentrically to the inner circumference of frame B; the forward edge of this shell 2 being recessed to accommodate the presence of rectangular shaped lugs 3, 3, that are, preferably, about ninety degrees apart and project rearwardly from flange C and are integral with the same and with said circular frame. The rear end of shell 2 is secured in the outer rabbeted edge of a metal annulus 4. This housing also comprises an inner:

cylindrical shell 5 which is spaced apart from the outer shell 2 and has its forward edge secured in rabbets in therear ends of lugs 3, 3, thus leaving an open space between said edge and flange C of the circular-frame B. The rear edges of the inner shell are screws (not shown) that are tapped into the said annulus. This head 6 is of a truncated cone shape, and in the top of the inclined sides thereof I make a red glass peep-hole 7. In the same horizontal plane as the center of this head 6, diametricallylw opposite each other I make carbon-holders flangeor bead 10 and secured in the rabbeted seat made to accommodate the same to the inner circumference of frame 18 next the forward side thereof, by means of set- screws 12, 12. This slide-holder is provided with an inwardly projecting flange 13 next its forward side and the forward edge of a circular condenser lens-holder or cradle is secured in. the annulus of said slide holder in a suitable manner and the forward condenser lens 14 when seated in said cradle is confined within frame B and bears against said flange 13.

The condensing lens holder or cradle consists of two circular frames or rims 15, 16,

in which the condensing lenses 14, 18, are.

seated. The rear rim 16 is angle-shaped in cross-section and is connected to the flat rim of the forward lens 14 by a semi-cylindrical web 19. The rims 15 and 16 and the web 19 are, preferably, made from one piece of sheet metal. Web 19 connects the lower portions of said lenses, and it has a flat segmental spring 21 secured transversely to the inner surface thereof in such manner that its ends project above the upper edge of web 19, and, in their normal positions, bend inward within the perimeter of the lenses. In addition to this spring, T secure a pair of springs 20 to the inner surface of each side of web 19 that are of such dimensions and are disposed and arranged in parallel position inside of and alongside of spring 21, and bear against the margins of the condensing lenses and confine them in proper position in their respective rims. The cradle holding the condensing lenses is separated from the inner shell of the lamp-housing and there is always a .circulation of air through the series of openings 22 in the outer shell, and 23 in the inner shell and between the fore-shortened forward edges of the inner shell and the slide holders so as to reduce to a minimum the high temperature created by the burning of the carbons of the arc-lamp in the rear of the housing.

The annulus of the slide-holder has corresponding upper and lower guide- lugs 24, 24, projecting forward therefrom. These lugs are placed diametrically opposite each other and their opposing inner surfaces are horizontal. The ordinary slide is inserted transversely in the machine between these lugs 24 and is clamped against the forward side of the said annulus 9, by the pressure of the rear annular frame 25 forming the rear end of the tubular support of the projecting lens. This tubular support has a frustum shaped metal shell 26, which is greatest in diameter at its rear end, and its rear end is secured to the outer circumference of the annular frame 25, and its forward edges are suitably secured to the outer 'circumference of an inside ring 27. This ring 27 has a suitable flanged bushing 28 secured to and within the same, and the inner circumference of this bushing is screwthreaded and adapted to be engaged by the outer screw-threaded rear end of a nipple 29. The annular frame 25 and the ring 27 are connected by longitudinal bolts 30, which, when tightened up, securely hold said annular frame, ring and shell 26 in their assembled positions.

The projecting-lens holder 31 is of a conventional design, and T make no claim to inventorship of the same. Suffice it to say that the rear end of this lens holder has a screw-threaded portion which is removably tapped into the forward end of the nipple 29.

The projecting lens holder is secured to the slide-holder by means of screws 32 which are tapped through suitable smoothly bored openings in the annular frame 25, longitudinallyinto openings in lugs 24, 24. The

. headed ends of these screws 32 are provided with suitable washers, and between these washers'and the forward sides of said annular frame 25, coil expansion springs 33 surround the screws. These springs are of suflicient strength to press the annular frame against the forward ends of lugs 24 and to maintain the projecting lens and projectinglens-holder concentric to the focal axis of the condensing-lenses, and the arc-light in the rear of the housing. If the thickness of the slide-holder is greaterthan the length of the lugs 24, the pressure of the rear end of the projecting lens support will be sufficient to hold it in any position to which it may be adjusted. If the slide holder is of such width as to move too freely between the lugs 24, a set-screw, which is tapped down through the upper lug 24, can be manipulated to retain the slide-holder in the position desired.

. The screws 12 that are used to secure the slide-holder in place are tapped through the flange C of the circular frame. B and into the lugs 3, 3, thereof, situated above and below the axis of said frame, and the heads of these screws lapover the outer circumference of said circular frame and hold it in place while permitting it to be rotatable. At suitable points 12, located diametrically opposite each other, the circumferential edge of the circular frame of the slide-holder is flattened, and by rotating the slide-holder on ltd mentor its axis until these flattened portions are next said screws 12, the slide-holder and parts supported thereby can be removed from the housing by withdrawing the same longitudinally forward a suitable distance.

, Thisslide-holder, etc, can be inserted in place by the reversal of these movements. 'What I' claim as new is:

1. In a device of the class described, a-housing consisting of concentric inner and outer ing the rear end. of the housing, a lamp supported bythe tapering head,a frame having lugs secured to the forward end of the hous ing for securing the frame and housing together, a slide-holder secured insaid frame, a cradle in the housing in the rear of the slide-holder, a pair of condensing lenses in said cradle, and a plurality of springs supported by the cradle and disposed relatively to the-lenses. V

' '3. In a device of the .class described, a

housing consisting of concentric inner and.

outer perforated shells, a'tapering head closing the rear end of the housing, a lamp supported by the tapering head, a frame having lugs secured to the forward end of the housing for securing the frame and housing together, a slide holder: secured in said frame, a cradle in the housing in the rear of the slide-holder, a pair of condensing lenses in said cradle, and a plurality of springs supported by the cradle and disposed relatively to the lenses; one of said springs being flat and others being curved.

4. In a device of the class described, a housing'consisting of concentric inner and outer perforated shells, a tapering head closing the rear end of the housing, a lamp supported by the tapering head, a frame having lugs secured to the forward end of the housing for securing the frame and housing together, a slideholder secured in said frame, condensing lenses and a cradle for holding said lenses consisting of frames in which the lenses are seated, and a web connecting said frames.

5. fn a demos of the class descr bed, a housing conslstlng of concentr1c mner and outer perforated shells, a tapering head closing the rear end of the housing, a lamp supported by the tapering head, a frame having lugs secured to the forward end of the housing for securing the frame and housing together, a slide-holder secured in said frame, condensing lenses and a cradle for holding said lenses consisting of frames in which the lenses are seated, a web connecting said frames, a separating spring attached to the web, and curved lens supporting-springs also attached tothe web.

In witness whereof I have hereunto set my hand this 12th day of February, 1914. I ALEXANDER FERDINAND VICTOR. Witnesses:

'FRANK D. Tnomason,

1F nonnncn MITCHELL.

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