US1388193A

US1388193A - Projecting apparatus

Info

Publication number: US1388193A
Application number: US350539A
Authority: US
Inventors: George L W Palmer
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-01-10
Filing date: 1920-01-10
Publication date: 1921-08-23
Anticipated expiration: 1938-08-23

Description

G. L. W.PALMEH. PROJECTING APPARATUS.

APPLICATION FILED IAN. 10, 1920.

1,388,193. l Patented'Aug. 23, 1921.

5 sHEE's-SHEET 1.

G.l L. W. PALMER.

PROjECTING APPARATUS.

APPLICATION FILED 1AN.10,1920.

1 ,388, 1 93. Patented Aug. 23, 1921.

5 SHEETS-SHEET 2- I I 7112670607. v

WPaf/w @or el. 5522054?? E G. L.. W. PALMER.

PROJECTING APPARATUS.

APPLICATION FILED JAN. l0, |920.

G. L.. W. PALMER.

PROJECTING APPARATUS.

APPLICATION FILED IAN. Io, 1920.

1,388,193. PatentedAug. 23, 1921.

lIIe-ll-II lm X717?) e 71150 7? o7" El. Wanr G. L. W. PALMER.

PROJECTING APPARATUS.

APPLICATION FILED um. lo. 1920.

1,388, 193. Patented Aug. 23, 1921.'

5 SHEETS-SHEET 5.

my zg ya@ 705 gli I3.

Z7Z/U671X07? UNITED STATES f 'GEORGE I. w. PALMER, or PLAINFIELD, NEW JERSEY.

PBOJECTING APPARATUS.

Specification of Letters Patent. Patented Allg. 23, 1921,

Application led January k10, 1920. l Serial No. 350,539.

To I all whom t may concern."

Be it known that I, Gnoncn L. W. PALMER,

a citizen of the United States, residing at' Plainfield, in the county of Union and State of New Jersey, have invented new and useful Improvements in Projecting Apparatus,A

rays and motor. v v

F 1g. 4 is a detail horizontal Section through of which the following is a specification.r

This invention relates to improvements in projecting apparatus. Y Y Y Y Thev object ofthe invention is to provide a simple, automatic-apparatus for displaying a series of transparencies, the said apparatus being controlled by the lecturer from a distant point, thereby eliminating the necessity of anattendant who is generally obliged to accompanythe lecturer to operate the apparatus. Y

Another object-of the invention isto vprovide an automatic apparatus which will dis-` play a series of transparencles and repeat the display an indefinite number of times without requiring the attention ofy an attendant.

Still another object of the invention is to provideinstrumentalities whereby a container with a plurality of transparencies therein maybe brought into position and all' of said transparenciesfpresented to the projecting instrumentalities, whereupon the said container'will be advanced and succeeded by another containerthe 'operation being repeated for each container. y

Still another object of the invention is to provide instrumentalities for presenting the several transparencies'to the projecting instrumentalities and for automatically returning said transparencies to their original positions within their respective containers, whereby the display-may be repeated continuously in the same order in which it was first presented.

It is still further the object of vthe invention to provide means for locking the rotary carrier forv the transparency containers. to

prevent the rotation thereof during the interval when the transparencies are being presented to the projecting instrumentalities.

The invention consists yin the combination and arrangement of parts whereby theabove objects and certain other objects 'hereinafter appearing may be attained as set forth in the following specification and particularly pointed out in the claims.

Referring to the drawings:

Figure l is a vertical section Withparts shown in elevation of a projecting apparat-us embodying my invention. i i

Fig. 2Y is a vertical section taken .on the line 2 2 of Fig. l, portions thereof being illustrated in elevation.

Fi 3 is a front elevation as viewed from the `irection of the arrow a, Fig. 2, of the timing switches for controllingthe luminous 1 the light switch, taken'on theline 4 4 of Fig. 3, its operating cam being illustrated in connection therewith.,

Fig. 5 is aV detail horizontal section through the motor switch, taken on the-'line 5 5 of Fig. 3, its operating cam being `illustrated in connection therewith. I v

Fig. 6 is a horizontal section taken on the line' 6 6 of Fig. 2.

. Fig. 7 is a diagrammatical representation of; the various electrical equipment, together-- withv the various electriccircuits connecting the same.

Fig.y 8'is an enlarged planview of the tary carrier, the transparency containers' mounted thereon, together with the cam for returning the transparencyy containers -tof their initial position.

Fig. 12'is a perspective view of a transparency holder therein.

Fig. 13'is a detail vertical section taken on i the line 13 13 of Fig. 8, illustrating the mechanism for rotating the carrier.v

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 1 designates the instrumentalities for producing luminous rays and in its present embodiment consists of an' electric lamp 2 secured to'a support 3 which in turn is supported by an insulator block'.

4. TheV block 4 is adjustable upon a post 5 to which it is fastened by4 an adjusting screw 6. The post 5 projects upwardly from a slide 7 vwhich is adjustable upon` a platwith a transparency shown form which is supported by a plurality of standards 9. The above-mentioned parts to project the luminous rays upon a screen,

said lenses preferably embodying a pair of condensing lenses 11 which 'are located with; in a receptacle 12, and the yusual projecting lenses which are positioned within a casing 13 all disposed in proper alinement upon the platform 8. The light'producing and projecting instrumentalities are constructed and arranged in accordance with the construction usually followed in an apparatus of this nature'which is well known to those skilled in the art.

One of theconjugate foci of the lenses of this apparatus is shown at B and into this position the transparencies or slides are moved at certain intervals so as to intercept the rays of light passing through the lenses and result inthe projecting of the image or images on Vsaid transparencies'upon a screen, not shown in the drawings. Y

As hereinbefore stated, one ofthe features of this invention is toprovide a mechanism for'automatically presenting the transparencies to the projecting instrumentalities or, in other words, for successively placing said transparencies in the position indicated at B, Fig. 1. The preferred manner of accomplishing this result is to provide a plurality;

of transparency containers 14 in which the transparencies 15 are arranged parallel with each other, the containers themselves being disposed about la common axis and revolved about said axis so as to aline with the axis of the rays of light,` said axis being indicated by the line A-A, Fig. 1. i

The containers 14 are each detachably secured to a rotary carrier 16 preferably 'consisting of a supporting member 17 which is loosely mounted upon a vertical shaft 18 journaled to rotate in bearings 19 and 2.0 which are provided in a frame 21 which is mounted upon a base 22. The rotary carrier 16 includes a plurality of rods 23, the said rods preferably being arranged in pairs.

There are four pairs of these rods each pair being arranged radially relatively to the shaft 18. A slide 24 is mounted upon each pair of rods 23` to slide radially with respect to the axis of the rotary carrier 16,said slide having lugs 25 which engage the rods 23 of the rotary carrier 16.

The containers 14 are preferably of rectangular vform Vand are provided with a plurality of vertical grooves 26 formed in two opposite sides of said container, each of.

said grooves vbeing adapted to receive a holder 27, clearly illustrated in Fig. 12, which in turn is adapted to hold one of the transparencies 15.

The containers 14 are provided with ledges` 28 at the lower end of each groove 26, said ledges engaging the lower edge 29 Vof said holders and thereby preventing said holders from dropping through the bottom of the rcontainer which is otherwise open, while the top of the container is entirely open to permit said holders l to be inserted 'j in the lgrooves 26.

The containers rest upon the slides 24 between oppositely disposed' verticalsides 30 andv 31 formed integral with said slides. The containersare furthermore cut away at 32 at theiixlower ends, see Fig. 2, to allow the sides of the container to project below Vthe slide 24.

The containers are also lockedV against vertical movement when in position -upon their respective slides byV spring catches 33 which are attached to opposite sides of the container, the said catches being provided with a lip 34 which'engages a plate 35 fastto each of the

sides

30 and 31 of the slide 24, as clearly illustrated in Fig. 1. The containers are therefore prevented from becoming displaced upon the slides either longitudinally, transversely or vertically thereof whenl the transparencies contained therein are elevated to intercept the rays of light, but at the same time said containers may be readily detached from the slide when itis desired to supply a new set of transparencies therefor.

The transparency holders 27 are of skeleton construction and preferably consist of a base portion 36 from'which project upright members 37 which are provided with grooves 38 within their inner edges adapted to receive one of the transparencies 15. Upon the outer edge of the upright members 37 is provided a tongue v39 which is adapted toV slide vertically in Vthe grooves 26provided in the transparency container 14. Y v

The movement of the rotary carrier 16 is intermittent, thereby providing a rest during the intervalwhen the transparencies 15 of each container 14 are being presented to the projecting instrumentalities, it being understood that all of the transparencies in a container are exposed to said projecting instrumentalities before a v succeeding container is moved into position.

vThe mechanism for imparting to the Y rva5 containers 14. The portions of said driven member between said slots are concaved at 44 to correspond with the periphery of the driving member 41, said periphery being circular in form. The driving member 41 in the present instance is adapted to rotate the driven: member one quarter of a rotation for eac-h complete rotation of said driving member and for this purpose a pin is located at the proper point and adjacent to the periphery of the driving member to enter the slots 43 in said driven member and thus r0- tate said member.

The periphery of the driving member 41 is recessed at 46 adjacent to the pin 45'to permit said driving member to be moved when in engagement with said pin, while the curved periphery engaging the concaved portions 44 of said driven member positively prevents the movement of said driven member when said pin is not in engagement therewith. The pin 45 is attached to one face of a gear 47, said gear being attached to the drivingl member 41. A continuous rotary motion is imparted to the gear 47` through a pair of spur gears 48 and 49, a worm gear 50 and a worm 51. The worm gear 50 and the spur gear 49 are attached to a vertical countershaft 52, while the worm 5l is attached to the arbor 53 oan electric motor 54.

Fast to the shaft 18 is a bevel gear 55 which meshes with and drives a bevel pinion 56 fast to a horizontal shaft 57 which is mounted to -rotate in brackets 58 and 59 depending from a portion of the frame 21. The relative proportions of the gear and pinion 56 are such that the shaft 57 will make a complete rotation for everyl quarter rotation ony the shaft 18. Fast to the shaft 57 is a cylindrical cam 60, the periphery of which is provided with a groove 61 which makes a plurality of revolutions therearound. j

Referring to Fig. 10, it will be noticed that the cylindrical cam is provided at its opposite ends with

shoulders

62 and 63, the groove 61 starting at the shoulder 62 and extending around the cam to yprovide for regular intervals of rest as at 64 for a greater part of airevolution'and then a quick advance as at 65.

Each slide 24 is provided upon its inner side 31 .with a lug 66 in which is mounted a vertically disposed rod 67. The rod 67 is provided at its lower end With'a `foot 68 which constitutes a follower and this follower is adapted to be engaged lby the sides of the cam groove 61. A spring 69 actstol always force the rod 67 together with its foot 68' downwardly.

In Fig. 1 the right hand slide 24 and transparency container 14 are in their initial positions or the positions they occupy when 'they present the iirst transparency 15 to the.

85 aretied together by a yoke 86.

ldirection of either of the arrows b, Figs.

9 and 10, the sides of the groove 61 will engage the foot 68 and impart to the slide 24 and the container 14 mounted thereon a step by step movement radially upon the rods 24, the said movement being equal to the distance between successive transparencies in the container 14.

Y The arrangement of the gearing previously described is such that each time the cylindrical cam 60 comes to a stop one of the transparencies 15 will be in proper alinement with one of the conjugate foci B of the lenses, it then remains 'for each transparency alining with said location B to be moved .from its container into a position to intercept the rays of light. For this purpose an elevator 70 is provided, said elevator preferably consisting of a frame 71 to which is secured a pair of vertically disposed rods 72 arranged in alinement with the transparency holder 27 alining with the location B. lThe upper ends of the rods72 terminate slightly below the lower edge 29 of the transparency holder 27 so as to provide sufiicient clearance to permit the carrier to be rotated without interference. The rods 72 reciprocate in bearings in the frame 21 and the frame 71 preferably slides upon xed guide rods 73 secured at their opposite ends in the frame 21.

A cam lever 74 is pivoted at 75 to a projection 76 formed integral with the frame 21. The opposite end of the lever 74 engages a pin 77 projecting from the frame 71. A

A41 with which it is adapted to rotate. vThe roll 78 traveling upon the upper end or' the cam is adapted to raise the elevator 70 and thus move the holder 27 together with its transparency into intercepting relation with the rays of light, as illustrated in Figs. 1 and 2. y

The elevator 70 is returned to its normal position at the proper time by a portion 8O of the cylindrical cam 79, the-said portion SOengaging thev upper side of the cam roll 78 and forcing said roll downwardly through a slot, 81 'formed in said cam. The lever' 74 is lifted by the inclined edge 82 of the cam. Whenin its lowermost position, the frame 71 rests upon buffers 88 which prevent any noise when said frame reaches the end of its downward movement.

' VAs the holder containing the transparencies is being raised by the elevator the ripper edge of the transparencies will engage a weight 84 which is mounted to slide upon vertical rods 85. The upperends of the rods The weight 84 insures a quick return of the holdyvided a slot 91.

ers 27 to the containers when the cam lever 74 is retracted and overcomes any tendency which might exist which would cause the holderto stick and prevent it from dropping back into its container.

After a transparency has been moved to the position B where it intercepts the rays of light and the image thereon has been proj ected upon the screen and the transparencies returned to the container, the cylindrical cam 60 is given one rotation whereupon the next transparency in the container is advanced to the position formerly occupied by the first transparency, whereupon the second transparency will be moved into position to intercept the rays of light after which it is returned to the container and so on until all of the transparencies within a container have been shown upon the screen after which another container'will be brought into position, as will be hereinafter described and the transparencies in the second container will be successively presented to the projecting lnstrumentalities.

During the interval when the transparencies 15 are being presented to the projecting instrumentalities, it is desirable to lock the rotary carrier 16 to prevent the rotation thereof. This is accomplished in the following manner:

Referring particularly to Figs. 8 and 9, a'substantially circular bed plate 87 is provided which rests upon the frame 21. The bed plate has an opening 88 formed therein through which projects a slight distance the cylindrical camy 60, the upper surface 89 of said bed plate being tangent with the bottom of the groove 61 of the cylindrical cam. Located slightly above the cylindrical cam and fastened to projections formed integral with the bed plate 87 are a pair of guide pla-tes 90 between the adjacent edges of which is pro- Vith the exception of the interval when the foot 68 is resting upon the

shoulders

62 and 63 of the cylindrical cam 60, the adjacent edges of the guide plates 90 engage an enlarged portion 92 of the rods 67 at which time the rotary carrier 16 is prevented from moving. resting upon the shoulder 62, which is the initial positionof the container, the finger 93 formed integral with a slide plate 94 partially surrounds the enlarged portion 92 of the rod 67, while during the interval that the foot is resting upon the shoulder 63, which position is illustrated in dotted lines, Fig. 8, the said dotted position being the final position of the container, a projection 96 projects in the path of said enlarged portion 92.

It is'evident that it is necessary to move:

When the foot 68 is.

the-lever 95 engages a pin 97 which projects upwardly from. the slide plate 94, while the other end of said lever is held by a spring 98 in envagement with a cam v99 Awhich is fastto tlle upper end of the shaft 42. As the cam 99 is rotatedinthe direction of the arrow c, Fig. 8, the lever 95 will be suddenly rocked by the drop of the cam at the, point 100, thereby causing the slide plate tomove toward the right, Fig. 8, being guided by the studs 101 which pass through a slot 102 formed in said slide plate.

lWhen all of the transparencies within a container have been presented to the projecting instrumentalities the carrier 16 is rotated through an angle of 90o moving thereon the before-mentioned container and simultaneously moving another container Vinto posi- 61, the bottom of the groove 103 being tangent with the bottom of said groove 61. For 90o the groove 103 extends around the surface of the bed plate 87 concentric with the shaft 18 after which it continues'for 2700 subsantially in the form of a spiral terminating in alinement with the shoulder 62 of the cylindrical cam 60. The foot ..68 is adapted to slide in the canav groovev103, the enlarged portion 92 of the rod 67 being engaged at the proper time by y'a rotary pushing device 1041, see Figs. 8 and 18. This device consists of a member 105 which is fast to the vertical shaft 18 and rotates intermittently therewith. Mounted inbearings 106 formed upon the underside of the member 105 are two oppositely disposedL yrods 107 each of which is forced continually by springs 108 against the periphery of a stationary cam v109 which is rigidly fastenedto the bed plate 87. The cam 109 is provided at 110 with a sudden drop.

As the pushing device 1041 is rotated in the direction of the arrow d, 8, from the position illustrated in dotted Vlines to that illustrated in full lines, one ofthe rods 107 will engage the portion 92 of the rod 67 which is projecting downwardly from the slide 241 and rotate the carrier 16 through anvagle of ,90", at the saine time transferring the foot 68 Afrom the shoulder63 1.20

drawn from behind the rod 67 by reason of the opposite end of saidrod 107 reaching the point 110 of the cam 109 and suddenly being forced inwardly by the spring 108. The pushing device 104 continues to function with each subsequent intermittent 'rointermittent rotation of the carrier advancr ing the first container 90 and simultaneously moving it still farther outwardly until it is again delivered to its initial position where its transparencies may be again presented to the rays of light.

It is desirable that during the interval when the transparencies are being chan ed that the rays of light shall be shut ofl". his is accomplished 4automatically in coperation with the mechanism for changing thev transparencies as follows:

Referring particularly to Figs. 3, 4 and 7, a switch 111 is provided, the saidswitch embodying in its construction a flexible metallic contact member 112 which is mounted upon an insulator plate 113 and a contactmember 114 constructed of graphite which is adjustably mounted in a plate 115 which constitutes a terminal for a wire 116. The terminal plate. 115 is fast to the insulating plate 113. The graphite of which the contact member 114 is constructed acts as a condenser to reduce the spark as the contacts make and break. The contact member 112 is connected to a plate 117 by screws 118, the f said plate constituting a terminal for a wire 119. The wire 116 connects the terminal plate 115 directly with the electric lamp 2. Another wire 120 connects the electric lamp 2 with the line wire 121, while the wire 119 connects the terminal plate 117 with a second line wire 122. The

linewires

121 and 122 are connected to a suitable source of electric supply. A disk 123 constructed of insulating material is fast to the shaft 42 and rotates therewith. The periphery' of the disk 123 is adapted to engage thek flexible contact member 112 atl the proper time and force the same into contact with the contact member 114, thereby completing an electric circuit which includes a line wire 121, wire 120, elect-ric lamp 2, wire 116, switch 111, wire 119 and line wire 122 thus lighting the electric lamp 2. When, however, the circuit through the switch 111 is broken by reason of a portion of the periphery of the disk 123 being cut away at124,l the rays of light will be extinguished and will remain so a sufficient length of time to permit the chang'- ing of the transparencies.

As hereinbefore stated one of the novel features of this invention is that it may be` controlled by the lecturer exhibiting. the transparencies from his station which may ybe upon the platform or some other convenient place which may be at some distance' from the point where the apparatus is located. This is accomplished as follows:

Referring particularly to Figs. 3, 5 and 7, a switch 125 is provided similar to the switch 111. This switch also embodies in itsk construction a flexible metallic contact member 126 which is also mounted upon the insulating plate 113, and a screw 127 constituting a second contact member which is ad-I justably mounted in a plate 128 which constitutes a terminal for a wire 129. The plate 128 is fast to the insulating plate 113. Thev contact member 126 is connected to a plate 130 by screws 131, the said plate 130 constituting a terminal for a wire 132. The wire 129 connects the terminal plate 128 with the line wire 122. The wire 132 connects the terminal plate 130 directly with` the terminal 133 of the electric motor 54, while a wire 134 connects the other terminal 135 of said motor with the line wire 121.

Andisk 136 constructed of insulating material is fast to the shaft 42 and rotates therewith. The periphery of the disk 136 is adapted to engage the flexible contact member 126 to force the same into contact with the contact member 127. The periphery of the disk 136 Yis also provided with a cutaway portion 137. The contact of the

members

126 and 127 may or may notcom-A plete an electric` circuit as will be hereinafter fully explained.

Conveniently located upon the base 22 ofA the apparatus is a switch 138. This switch embodies in its construction

Hexible contact members

139 and 140 and a ost 141, all insulated from each other.

T e members

139 and 140 normally contact with the post 141. Ay wire 142 connects the member 139 with the terminal plate 128, while another wire 143 connects the member 140 with the ter-v minal plate 130.. A plug 144 having

contact pins

145 and 146 is adapted to engage the

contact members

139 and 140 and force said members out of enfragement with the post 141, thereby breaking the electric circuit which at times iscompleted through said members and the post 141. The

pins

145 and 146 are connected by

wires

147 and 148 respectively to a'switch 149 of well-known construction which is held by the lecturer and which is operated by a push button 150. The lower portion of the apparatus is inclosed within a sheet metal casing 151.

During the operation of the device when the same is being used for lecture purposesv the lecturer desires that a transparency may be thrown upon the screen, not shown, and remain upon said screen indefinitely while he is delivering that portion of his lecture which refers to the picture which is being exhibited. In order that this picture may remain indefinitely upon the screen, the motor 54 must be stopped at a certain point by breaking the electric circuit which includes the motor. During the period that the motor is running this circuit includes the

wires

121 and 134, the motor 54, wire 132, switch 125 and

wires

129 and 122, the contact members 126 and 1270i the switch 125 being held in engagement with each other by the disk 136. The motor will continue to run until the

contact members

126 and 127 arel 146, wire 148, switch 149, wire 147, pin` 145,Y

contact member 139, wire 142, terminal plate 128 and the

wires

129 and 122, see Fig. 7. It is necessary for the lecturer to push continually upon the button 150 for a short period of time to enable the motor 54 to rotatev the disk 136 to a point where its periphery will again engage the flexible contact member 126 and again complete the circuit through the switch 125` During the interval when the lecturer is manually operating the switch 149 to vcompletethe motorcircuit, the electric light circuit will be broken through the switch 111 and during the period that said electric light circuit remains broken ay new transparency will automatically be brought into position ready to be thrown upony the screen when said circuit is again completed. When the motor circuit is again completed through the switch 125 the lecturer may release the' button 150 and the motor will continue to run until the circuit through the switch 125 is again broken. If the lecturer releases the button 150 too soon, he will be made aware of the fact by the non-appearance of the succeeding transparency and a further pressure on said button is necessitated.

When it is not desired to use the deviceV for lecture purposes, but rather for displaying advertising matter and it is desired that the operation shall be entirely automatic and in no way controlled by an attendant, the plug 144 is removed. This will allow the

contact members

139 and 140 to engage the post 141, the result being that an electric circuit which includes the motor will always be completed allowing the motor to run con.- tinuously in spite of the fact that the disk 136 and switch mechanism 125 continue to function. This circuit includes the

wires

121 and 134, motor 54, wire 132, terminal plate 130, wire 143, contact member 140', post 141, contact member 139, wire 142, terminal plate 128 and the

wires

129 and 122. The circuit never passes through the switch 125.

During the general operation of the apparatus hereinbefore speciiically described all of the transparencies in the irst container are thrown upon the screen, the carrier is then rotated one quarter .of a turn and all of the transparencies of the second contain-er are thrown upon the vscreen and this operation is continued until all of the transparencies havebeen successively presented to the rays of light after which the operation is repeated indefinitely it desired, or other containers with new sets of transparencies may be inserted in their place upon the carrier and operate in the same manner.

While I have herein shown and described the preferred embodiment of my invention for the purpose of illustration, it is to be understood that the invention is not limited to the mere details or relative arrangement of the parts or to the specific applications herein shown, as extensive alterations may be made in the illustrated form and embodiment of the invention without departing from the principle thereof.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. A projecting apparatus having, in combination, instrumentalities for projecting `luminous rays, a carrier constructed and arranged to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, means to feed said transparencies consecutively from each oi said containers into the path of said ravs, i

and means to move said carrier after a p urality of transparencies have been fed consecutively from a container into the path of said rays.

2. A projecting apparatus having, in

combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate .in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold lurality of transparencies in substantially ateral relation to the axis of said rays, means to feed said transparencies consecutively from each of said containers into the path of said rays, and means to move said' carrier after a plurality of transparencies have been fed consecutively from a con-V tainer into the path of said rays.

3. A projecting apparatus having, in combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers, means for supporting a plurality of sets of parallelly disposed transparencies in said containers, means to feed said transparencies one by one consecutively from each of said containers into the path of said rays, and means to move said carrier after all of the transparencies of a container have been fed into the path of said rays.

4. A projecting apparatus having, in com-- bination,v instrumentalities for projectingv luminous rays, a carrier constructed and arranged to rotate ina plane substantially parallel with the axis of said rays, a plurality of transparency containers, Y each adapted to hold a plurality of transparencies in parallel relation, means to feed said transparencies one by one consecutively from each of said containers into the path of said rays and mechanism for intermittently rotating said carrier to move each of said containers into a plane of said luminous rays after a plurality of the transparencies of one of said containers havebeenpresented 1 transparencies into the pathvof said rays,

and means to move said carrier after a plu- Vrality of the transparencies of a container have been fed consecutively from said container into the path of said rays.

6. A projecting apparatus having, in conibination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a Vplane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier, each adapted to hold a plurality of transparencies, means to intermittently move each of said containers radially upon said carrier to successively position the transparencies in said containers in a predetermined position relatively to said l projecting instrumentalities, means to feed said transparencies consecutively from each of said containers into the path of said rays, and means to intermittently rotate said carrier after a plurality of the transparencies of a container have been fed consecutively from said container into the pathv of said rays.

bination, instrumentalities for projecting luminous rays, a carrier constructed and ar- 7. A projecting apparatus having, incom-Y ranged to rotate in a'plane substantially parallel With the axis of said rays, a plurality of transparency containers mounted upon said carrier, each adapted to hold a plurality of transparencies, means to move each of said containers radially upon said carrier, an elevator adapted to aline with one of the transparencies in a container When said container is in a plane containing the axis of. said luminous rays, means for operating said elevator to engage said transparencies and move the same one by one consecutively from said container into the path of said rays and means to rotate said carrier after a plurality of the transparencies of a container have been fed consecutively from said container into the path of said rays.

8. A projecting apparatus having, in combination, instrumentalities for l projecting luminousrays, a carrier constructed and arranged to rotate in a plane substantially parallel With the axis of said rays, a plurality of transparency containers mounted upon said carrier, each adapted to hold a plurality of transparencies, means to move each of said containers radially upon said carrier, an elevator adapted to aline With one of the transparencies in a container when said container is in a plane containing the axis of said luminous rays, means forv operating said elevator to engage a transparency alining therewith and for moving said transparencies consecutively from said container into intercepting relation with said rays, means for returning said transparencies to said container upon the Withdrawal of said elevator, and means to move said carrier after a plurality of transparencies have been fed consecutively from said container into the path of said rays and back into said container.

9. A projecting apparatushaving,.in combination, instrumentalities for projecting luminous rays, a carrier constructed and ai' rangedl to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted vupon said carrier, each adapted to hold a plurality of transparencies, a rotary cylindrical cam, followers cooperating with said cam adapted to move said containers radially with respect to the axis of said carrier, means to feed said transparencies one by one consecutively from each ot said containers into the path of said rays, and means to rotate said carrier.

l0. A projecting apparatus having, in combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, a rotary cylindrical cam, means cooperating with'said cam adapted to intermittently move said container radially with respect to the axis l of said carrier, means to feed said transparencies consecutively from each of said containers into the path of said rays, and means to rotate said carrier.

11. A projecting apparatus having, in combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a plane substantiallyparallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, a rotary cylindrical cam, means cooperating with said cam adapted to intermittently move said container radially with respect to the axis of said carrier, means to feed said transparencies consecutively from each of said containers into the path of said rays, means to lock said carrier to prevent the rotation thereof during the interval in which. the

transparencies of a container are being fedv to said rays, and means to rotate said carrier.

12. A projecting apparatus having, in

combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, a rotary cylindrical cam, means cooperating with said cam adapted to intermittently move said container radially with respect to the axis of said carrier, means to feed said transparencies consecutively from each of said containers into the path of said rays, means to lock said carrier to prevent the rotation thereof during the interval in which the transparencies of a container are being fed to said rays, means to release said carrier after a plurality of the transparencies of a container have been fed to said rays, and means to rotate said carrier.

13. A projecting apparatus having, in combination, instrumentalities for projectingluminous rays, a carrier constructed and arranged to rotate in -a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, a -rotary cylindrical cam, means cooperating with said cam adapted to intermittently move said containers radially with respect to the axis of said carrier, means to feed said transparencies consecutively from'each of said containers into the path of said rays, means to lock said carrier to prevent the rotation thereof during the interval in which the transparencies of a container are being fed to said rays, means to release said carrier after a plurality of the transparencies of a container have been fed to said rays, and a pusher adapted to intermittently rotate said carrier.

14. A projecting apparatus having, in

combination, instrumentalities for ,project-l ing luminous rays, a carrier constructed and arranged to rotate in a planesubstantially parallel with the axis ofv said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, a rotary cylindrical cam, means cooperating with said cam adapted to intermittently move said container radially with respect to the axis of said carrier, means to feed said transparencies consecutively from each of lsaid containers into the path of said rays, means to lock said carrier to prevent the rotation thereof during the interval in which vthe transparencies of a container are being fed to said rays, means to release said carrier after a plurality of the transparencies of a container have been fed to said rays, a-

drical cam, followers cooperating with said cam adapted tomove said containers inward radially with respect to the axis of said carrier, means to feed said transparencies con` secutively from each of said containersy into the path of said rays, means to intermittently rotate said carrier, and a stationary cam adapted to cooperate with said followers to move saidk containers radially outward upon said carrier during the rotation thereof.

16. A projecting apparatus having, in combination, instrumentalities for projecting luminous rays, a carrier constructed and arranged to rotate in a plane substantially parallel with theraxis of said rays, a plurality of transparency containers mounted upon said container each Aadapted to hold a plurality of transparencies, aj-rotary cylindrical cam, followers cooperating with said cani adapted to move said containers inward radially with respect to the axis of said carrier, means to feed said transparencies consecutively from each of said containers into the path of said rays, a stationary cam, means to simultaneously rotate said carrier and transfer a follower from saidrotary cylindricalv cam to saidl stationary cam, whereby said containers may be moved ra- Itainer lying in the plane containing the axis ing luminous rays,a rotary carrier, a plu-` rality of transparency containers supported by said carrier, mechanism for rotating said carrier to move the several containers supported thereby into a plane containing the axis of said rays',a cam adapted to coperate with said containers when said carrier is at restk to effect a step by step `movement of each of said containers radiallyy with respect to the axis of said carrier, and means lfor moving all the transparencies in the conof Said luminous rays to intercept said rays one by one consecutively-`- 'i 18. An apparatus of the class described having, in combination, a rotary carrier, means for rotating saidv carrier, a plurality of slides supported upon said carrier to move radially relatively to the axis thereof, a transparency container detachably mounted upon each of said slides, means for imparting toeach of said slides successively an intermittent radial inward movement when said carrier is at rest, and means for return` ing Said slides to their initial positions.

19. An apparatus of the class described having, in combination, a rotary carrier, means for intermittently rotating said carrier, a plurality of slides supported upon said carrier to move radially relatively yto the axis thereof, a transparency container detachably mounted upon each of said slides-x means vfor imparting to each of said slides successively an intermittentv radial inwardY movement when said carrier is at rest, and means also for imparting to said slides a radial outward movement during ,the rotaryv movements' of said carrier.

720. An apparatus of the class described having, in combination, a carrier, a plurality of slides supported upon said carrier to move radially relatively to the axis thereof, a

ltransparency container detachably mounted upon each of said slides, a rotarycylindrical cam, vertical rodsV yieldingly mounted in said slides, a follower for each of said vertical rods adapted to cooperate with said cam to impart an intermittent radial inward movement to said slides, a pusher, horizontally disposed' rods thereon, means to force said horizontal rods into engagement I with said vertical rods, and means to intermittently rotate said pusher whereby a rotary motion may be imparted through said slides to said carrier.

21. An apparatus of the class described having, in combination, a carrier, a plurality drical cam, vertical rods yieldingly mounted in said slides, a follower for each of said vertical rods adapted to coperate with` said cam to impart an intermittent radial inward movement to said slides, a pusher, horizontally disposed rods therefor, means to force said horizontal rods into engagement with said vertical rods, means to intermittently rotate said pusher, and means to disengage said horizontal rods from said vertical rods at the end ofV said intermittent movement.

22. An apparatus ofthe class described having, in combination, a carrier, a plurality of slides supported upon said carrier to move radially relatively to the axis thereof, a transparency container detachably mounted upon each of said slides, a rotary pusher, a rotary cylindrical cam, vertical rods yieldingly mounted in said slides, a follower for each of said vertical rods adapted to coperate with said cam to impart an` intermittent radial inward movement to said slides, the final of said inward movements forcing s'aid slide into thepath of the pushing ins'trumentalities, and means to rotate. said pusher.

23. An apparatus of the class described having, in combination, a carrier, a plurality of slides supported upon said carrier to move radially'relatively to the axis thereof, a transparency container detachably mounted upon each of said slides, a rotary pusher, a rotary cylindricalA cam,vertical rods yieldingly mounted in said slides, a follower for each of said vertical rods adapted to coperate with said cam to impart an intermittent radial inward movement to said slides,

' the final of said inward movements forcing said slide into the path of the pushing instrumentalities, means to rotate said pusher through an angle of 90", and means to automatically withdraw the pushing instrumentalities from engagement with said slide.

24. An apparatus ofthe class described having, in combination, a carrier, a plurality of slides supported upon said carrier to move radially relatively lto the axis thereof, a transparency container detachably mounted `upon each of said slides, a rotary cylindrical cam, vertical rods yiel'dingly'mounted in saidslides, a follower for each of said vertical rods adapted to'coperate with said cam to impart an intermittent inward rotary movement to said slides, a pusher, horizontal rods therefor, a stationary cam adapted to force said horizontal rods into engagement with said vertical rods,means to intermittently rotate said pusher whereby a rotary motion may be imparted through said slide to said carrier, and springs adapted to force said horizontal rods out of engagement with said vertical rods at the end of the intermittent movement of said pusher. 25. A projecting apparatus having, in

combination, instrumentalities fory 'projecting rays of light, a carrier constructed and arranged to rotate in a plane substantially parallel with the axis of said rays, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, means Vto feed said transparencies one by one consecutively from each of said containers intothe path of said rays, means to automatically extinguish said rays of light during the feeding of each transparency, and means to rotate said carrier after a plurality of the transparencies of a container have been fed consecutively into the path of said rays.

26. A projecting apparatus having, in combination, instrumentalities for projectingrays of light, a carrier constructed and arranged to rotate in aA plane substantially parallel with the axis of said rays, a motor adapted to furnish the motivefpower for said apparatus, a plurality of transparency containers mounted upon said carrier each adapted to hold a plurality of transparencies, means to feed said transparencies consecutively from each of said containers into the path of said rays, and means to automatically stop said motor while a transthe path of said rays, means to automati cally stop said motor while a transparency is exposed to saidrays whereby said transparency may remain indefinitely in the path of said rays, and manually operated means adapted to start said motor. Y

28.` A projecting apparatus having, in combination, instrumentalities for projecting rays of light, a carrier constructed and arranged to rotate in a plane substantially parallel with theaxis of said rays, a motor adapted to furnish the motive power for said apparatus, a plurality of transparency containers mounted upon said carrier each adpated to hold a plurality of transparencies, means to feed said transparencies consecutively Afrom each of lsaid containers into the path of said rays, means to automatically stop said motor whileV a transparency is exposed to said rays, whereby said transparency may remain indefinitely in the lpath of'fsaid rays, manually operated means adapted to start said motor, and

means to automatically extinguish said rays of light during the feeding movement Vof said transparencies. Y

29. A projecting apparatuls having, in combination, instrumentalities for projecting lrays of light, a carrier constructed andv arranged to rotate in a plane substantially parallel with the axisfof said rays, a plurality of transparency containers mounted upon said carrier, each adapted to vhold a,

plurality of transparencies, means to feed.

said transparencies one by one consecutively from each of said containers intothe path of said rays, a switch adapted to automatically shut off said rays of light previous to the removal of a transparency from'the path of the rays of light and to automatically turn on said rays of light after a trans- 'Y parency has been positioned to intercept said rays of light, and means to rotate said carrier after a plurality of the-transparencies of a container have been fed consecutively into the path of said rays of light.

30. A' projecting apparatus having, in

combination, a` lens, instrumentalities for propjecting rays of lightthrough said lens, a rotary carrier adapted to revolve in a plane substantially parallel with said rays of light, a plurality of pairs of radial rods, a slide mounted upon each of said pairs of rods, a transparency container detachably mounted upon each of said slides adapted to contain a plurality of transparencies, means for intermittently rotating said carrier to successively move said containers into a position beneath and in a plane containing the axis of said rays of'light, means for impart- 'ing to each of said slides an intermittent radial inward movement between the rotary movements of said carrier to .successively aline the transparencies carried thereby with the optical centerof said lens, and means for' lifting the transparency alining with said optical center into a position to intercept saidV rays, of light.

31. A- projecting apparatus having, in-

parting to each of said slides an intermittent radial rinward-movement between the rotary movemets of said carrier to successively aline the transparencies carried thereby withthe optical center of saidlens, means for lifting the transparency alining with said optical center into a position to intercept said rays of light, and a switch adapt-- ed to automatically shut off and `turn on said rays of light.

32. A projecting apparatus having, in combination, a lens, instrumentalities for projecting rays of light through said lens, a rotary carrier adapted to revolve in a plane substantially parallel with said raysof light, a plurality of pairs of radial rods, a slide mounted upon each of said pairs of rods, a transparency container detachably mountedk upon each kof said slides adapted to contain a plurality of transparencies, a motor adapted to furnish the motive power for said apparatus, means for intermittently rotating said carrier to successively move said containers into a position beneath and in a plane containing the axis of said rays of light, means for imparting to each of said slides an intermittent radial inward movement between the radial movements of said carrier to successively aline the transparencies carried thereby with the optical center of said lens, means for lifting the transparency alining with said optical center into a position to intercept said rays of light, a switch adapted to automatically shut off and turn on said rays of light, and a second switch adapted to automatically stop said motor while a transparency is exposed to said rays of light, whereby said transparency may remain indefinitely in the path of said rays of light.

33. A projecting apparatus having, in

combination, a lens, instrumentalities for projecting rays of light throu h said lens, a rotary carrier adapted to revove in a plane substantially parallel with said rays of light, a plurality of pairs of radial rods, a slide mounted upon each of said pairs of rods, a transparency container detachably mounted upon each of said slides adapted to contain a plurality of transparencies, a motor adapted to furnish the motive power for said apparatus, means for intermittently rotating said carrier to successively move said containers into a position beneath and in a plane containing the axis of said rays of light, means for imparting to each of said slides an intermittent radial inward movement between the radial movements of said carrier to successively aline the transparencies carried thereby with the optical centerof said lens, means for lifting the transparency alining with said optical center into a position to intercept said rays of light, a switch adapted to automatically shut off and turn on said rays of light, a second switch adapted to automatically stop said motor while a transparency is exposed to said rays of light, whereby said transparency may remain indefinitely in the path of said rays of light, and manually operated means adapted to start said motor.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE L. W. PALMER. Witnesses:

MARY J. MATHEWS, ASA F. RANDOLPH.