US2521709A

US2521709A - Slide carrier

Info

Publication number: US2521709A
Application number: US707249A
Authority: US
Inventors: Jr Hobert W French
Original assignee: Argus Inc
Current assignee: Argus Inc
Priority date: 1946-11-01
Filing date: 1946-11-01
Publication date: 1950-09-12
Anticipated expiration: 1967-09-12

Description

Sept. 12, 1950 H. w. FRENCH, JR

SLIDE CARRIER Filed Nov. 1, 1946 INVENTOR.

#05027 W FRENCH, JR. BY

ATTOR Patented Sept. 12, 1950 Argus, Inc Ann Arbo Michigan SLIDE CARRIER Hebert W. French, J r., Howell, Mich., assignor to r,- Mich., a corporation of Application'Novernbcr 1, 1946, Serial No. 707,249 v v Thisinvention relates to rotary slide carriers for picture projectors and is particularly concernedwith means for at least partially ejecting a picture slide after it has been moved from projection position so that it may be easily grasped by 'theo-perator and removed from the carrier.

In its preferred embodiment, this invention will be described as an improvement over the rotary slide carrier illustrated and described in Fassin Patent No. 2,364,627, issued December 12, 1944. Essentially, the Fassin slide carrier has been improved to the extent of adding thereto a slide ejector mechanism operable when the slide carrierhas been rotated to move the slide away from its lower projection position into its upper position iorremoval by the operator.

While slide: ejectors for partially ejecting a slide from the carrier have been proposed for reciprocable slide carriers and found generally satisfactory in such carriers, to my knowledge this is the first time that such a slide ejector has been provided for a rotary slide carrier.

It is therefore a major object of my invention to provide a rotary slide carrier having novel means for-partially ejecting a picture slide to a position where it may be readily grasped for removal by the operator of the projection machine.

It is-a-further object of my invention to provide a novel cam slide ejector for av rotary slide carrier for a picture projection machine. Further objects of my invention will presently appear :asthe description proceeds in connection with the appended claims and the'annexeddrawings, wherein:

Figure; 1. is a'front elevation of a rotary slide carrier according to a preferred embodiment of my invention, particularly showing the shoe for mounting the carrier in the projector;

Figure Zis a front end view of the carrier of Figure 1' in projection position, further illustrat-- ing'the' cam for ejecting the slide;

Figure 3 is a front elevation similar to Figure 2 but showing the carrier rotated clockwise 90 from projection position and illustrating one slide in dot-dash lines as partially ejected from the carrier;

Figure 4 is a top plan view of the slide carrier of Figures 1 and 2;

Figure 5 is a section along line 55 of Figure 2, illustrating a preferred manner of assembly of the cam with the slide carrier;

- Figure 6 is a section substantiall along line 6-6 of Figure 1 illustrating further the assembly of the cam with the slide carrier;

(Figure 7 is an exploded. view-,mainly in section, of the pivot and cam assembly for mounting 11 Claims. (ores-2s) the slide carrier and the shoe in assembled relationship;

Figure 8 is an end elevation of the top of the shoe; and

Figure 9 is a section along line 9-9 of Figure.

' 7 illustrating the spindle shape.

My slide carrier comprises essentially a thin metal or lilge circular plate or dis-c -l mounted for rotation about its center upon a shoe or socket l2 that is adapted to interfit with a'corresponding support on a partv of aprojector as disclosedin said Fassin patent.

. Socket I2 is preferablymade from an integral blank of relatively stiff sheet metal formed with a rectangular picture framing window l3 located equidistantly between forwardly and inwardly,

b'entside walls l4 and 15 which form opposed underesurfaces adapted to rest on the top wall of a suitable support on the projector.v Tabs, H and I8 are so spaced vertically ,with respect to .win-

dow' I.3. that,they supportand locate socket mem beryl! on the projector with window l3 optically centered with the projection axis and the lens tube of theprojector, Channels [4 and I5 locate window 13 horizontally centrally in the projec tion light path and so interfit with the su port: onflthe projector'that shoe 12- is nonerotatably; Thus shoe [2 p o mounted on. the projector. vides' a nori-rotatable but removable'support for my rotary slide carrier on the projector. shoe is substantially the same as the shoe disclosed in Fassin Patent 2,364,627 and is prefer.-

ably associated with the projector in the same manner as in that patent,

Abovewindow l3 and vertically aligned with the optical centerof window It, projection I B issubstantially centrally' provided with a relatively I smallcircular aperture !9 (Figure 7) in which is secured a short hollow rigid cylindrical hub member 2| thathas its reduced forward end 22 staked over or otherwise rigidly secured within aperture I9. so, as to secure hub 2| non-rotatably to socket 1.2., If desired, hub 2! could be made integral with projection [6. Hub 2| is internally provided with a-cylindrical bore '23 anda smaller partly shoulder- 25 within hub 2| M;

Carrier plate II has secured thereto on the side opposite shoe I2 2. pair of channel forming strips 20 that internally contain Springs 20' for resiliently and frictionally holding the slides in inserted position. These springs, which are preferably the same as those fully illustrated and described in said Fassin patent, serve as stops to locate slides S1 and S2 in position before the associated apertures 40 and M of plate II.

A short spindle 25 is formed successively with a cylindrical portion 21 and a partly cylindrical and partly flat-sided portion 28 adapted to interfit snugly with bore 24 so that in the assembly the spindle will be non-rotatable but slidable axially with respect to hub 2 i. Portion 28 is longer than bore 24 in the axial direction to permit axial sliding of spindle 26 during turning of carrier H. At its forward end spindle 26 is formed with a short cylindrical portion 23 which is reduced in size to interfitfrictionally with a circular aperture 3|. in the center of plate H. The axial length of portion 29 equals the thickness of plate I I. Spindle 26 terminates in a screw threaded end portion 32 that extends through a suitable spacing washer 33 and a slide ejector cam 34 into a nut 35 which, when drawntight, holds the spindle, shoe and disc assembly together. Wi hin bore 23, a coiled compression spring 36 surrounds the shank of spindle 25, and spindle 26 is formed with a large cylindrical head which is of only slightly less diameter than the diameter of bore 23 so as to slidably fit therein. When nut 35 is tight, head 31 compresses spring36 and is positioned within bore 23 so as to close the outer end of bore 23.

Preferably, cam 34 is a cylindrical metal block which is eccentrically formed with a threaded aperture 38, whereby the cam may be mounted on threaded portion 32 of the spindle 26 like a nut. The function of washer 33 is to provide an antifriction axial thrust bearing connection between cam 34 and plate I I when plate I I is rotated about the journal provided by cylindrical portion 23 of spindle 25. When nut 35 is drawn tight, the spindle 26 is non-rotatably but axially slidably coupled to shoe I2, spring 36 controlling axial displacement of the spindle.

With spindle 26 and spring 36 inserted through bore 23 as illustrated in Figure 6, and with the cam 34 mounted on the spindle and locked tight thereon by nut 35,.cam 34 is rigid with spindle 36 which in turn is non-rotatable with shoe l2 and the projector supporting it. Care must be taken that cam 33 is so mounted uponspindle 26 that it is oriented in the generally horizontally extending position illustrated in Figures 2 and 3, whereby when disc I I is turned clockwise so as to move its lower projection aperture 40 through 180 to the upperslide insertion and removal position indicated at aperture 41, the slide will be partially ejected by the action of the cam.

,Cam 34 in the illustrated embodiment is disposed with its major axis of eccentricity at 90 to the vertical. The size and eccentricity of cam 34 is determined by the distance that it is desired to eject the slide. The cam must be so dimensioned and shaped that it will not interfere with full in-- sertion of a slide into the dotted line position S2 illustrated at the top of Figure 2. This is the slide insertion and removal station. After inserting a slide before aperture 4|, plate II is turned 180 in the direction of the arrow indicators 42-53, which is clockwise, to position slide S2 before the window I3; that is, the position S1 at the bottom-of Figure During the 180 movement just described, cam

34 of course has no action on the slide. After the slide at S1 has been projected, carrier II is then. rotated another 180, a fresh slide having been inserted at the top of S2 in the meantime, so as to bring the slide S1 to the top position where it may be withdrawn from the carrier. During its upward movement to the slide extracting position, the bottom edge of slide S1 is engaged by the projecting eccentric portion of relatively stationary cam 34 which thereby forces the slide radially outwardly in its guide substantially into the dotdash line illustrated at Figure 3. The eccentricity of cam 34 determines the amount that the slide is ejected and preferably the full throw of the cam, or maximum ejection, is accomplished by the time that the carrier has rotated to the position illustrated at Figure 3. Rotation of the carrier plate II continues until slide S2 assumes the position formerly held by S1 in Figure 2, but with the difference that the slide S1 now projects an appreciable distanc'e above the rim of plate I I and is readily available to be grasped by the fingers of the operator and extracted without danger of injury to the picture or other portions of the slide. The slide is frictionally held in partially ejected position by the action of the springs in the guide, which normally tend to hold the slide in any radial position.

While cam is illustrated as a solid block in Figures 1 through 9, it may assume any suitable form; for example, it may be a cylindrical cupshaped hollow stamping of steel metal, or it may simply comprise any part eccentric from the axis of spindle 23 which will engage the bottom edge of slide S1 and force it outwardly a desired distance during rotation of plate 'I Ito bring S1 from the lower projection position tothe upper extraction position. In practice the throw of a suitable cam 36, using 2"-by-2" conventional 001- or transparency slide mounts as S1 and S2, is satisfied by a horizontal eccentricity of about inch in the cam.

During rotation of disc il relative to shoe i2, cooperating detents and apertures on the shoe and disc serve to locate disc 'II in either of its two part projection positions, axial separation of the shoe and disc as the detents ride between the apertures being permitted by the axial sliding between spindle 2'6 and hub 2i against the force of spring 36, all as disclosed in said Fassin patent The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is: I

1. In a rotary slide carrier, a stationary support, a slide mounting member rotatable about an axis on said support, a spindle non-rotatably mounted on said support and on which said rotatable member is journalled, and a radially extending projection on said spindle adapted to engage and partially eject a slide from said movable member as the latter rotates away fromslide projecting position.

2. In the carrier defined in claim 1, said spindle being axially slidably supported on said support.

3. In the carrier defined in claim 1, said projection comprising an eccentric cam rigid with said spindle.

4. In a rotary slide carrier assembly, a stationary hub, a spindle non-rotatably but slidably mounted 'Withinsaid hub, a slide carrying member rotatably mounted on said spindle, and a radially projecting slide engaging and ejecting member rigid with said spindle.

5. In a rotary slide carrier having a support for mounting it on a projector, a slide mounting member rotatably mounted on said support and turnable through more than a single revolution in a given direction, a, substantially radial slide socket on said member and means stationary with said support adapted to engage and outwardly displace a slide in said guide topartially eject a slide from said member during rotation of said member to move a slide away from projection position.

6. In a rotary slide carrier, a support having a bore, a longitudinally biased spindle axial y sliablc in said bore but non-rotatable with respect to said support, a cylindrical portion on said spindle, a, rotatable slide mounting member journaled on said cylindrical portion, and a slide ejector on said spindle having a radially projecting part adapted to engage and partially eject a slide from said member during rotation of said member.

7. In a rotary slide carrier assembly, a stati0nary spindle, a picture slide mount member journaled on said spindle, guide means on said memher for slidably receiving a picture slide and a radial projection on said spindle for engaging the inner edge of a picture slide in said guide means and partially ejecting the picture slide during rotation of said member.

8. In the assembly defined in claim 7, said guide means extending radially of said spindle.

9. In a rotary slide carrier, a member having a part for attachment to a projector, a slide support mounted on said member for rotation about an axis for successively moving said slide support from an initial position where a slide may be placed on said support to a slide projection position and then back to said initial position, said support being rotated. about said axis in the same direction to accomplish said successive movements, and relatively stationary means on said member effective only during rotation of said support to engage and displace said slide substantially radially outwardly of said support for partially ejecting said slide from said support so that the slide may be readily available for extraction from said support by an operator.

10. In a'rotary slide carrier assembly, a, support having a part for attachment to a projector, a member on said support rotatable through more than a single revolution in a given direction for successively carrying a slide into and out of projection position, and relatively stationary means on said support projecting eccentrically with respect to the axis of rotation of said member for engaging nd displacing said slide substantially radially outwardly of said member for partially ejecting said slide from said member as the latter rotates away from said projection position.

11. In a rotary slide carrier assembly, a support having a part for attachment to a projector, a slide mounting member on said support rotatable through more than a complete revolution in a given direction, a radial slide socket on .said member and relatively stationary means on said support offset with respect to the axis of rotation of said socket adapted to engage and partially eject a slide from said member as said memher is rotated away from slide projecting position.

I-IOBERT W. FRENCH, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 488,057 Breed Dec. 13, 1892 757,737 Green et al Apr. 19, 1904 1,595,077 De Vry Aug. 10, 1926 2,364,627 Fassin Dec. 12, 1944