US2968993A - Automatic magazine slide projector - Google Patents

Description

Jan. 24, 1961 T. S. BRISKIN ETAL AUTOMATIC MAGAZINE `SLIDE PROJECTOR Filed March 21, 1955 18 Sheets-Sheet 1 fado! $0 z 2/ Jan. 24, 1961 T. s. BRlsKlN ErAL 2,968,993

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AUTOMATIC MAGAZINE SLIDE PROJECTOR Filed March 2i, 1955 United States Patent O AUTOMATIC MAGAZINE SLIDE PROJECTOR Theodore S. Briskin, Chicago, Robert L. Moore, La Grange Highlands, and Rudolph A. Rom, Stickney, Ill., assignors, by mesne assignments, to Revere Camera Company (formerly Samica Corporation), a corporation of Delaware Filed Mar. 21, 1955, Ser. No. 495,474

13 Claims. (Cl. 88--28) This invention relates to slide projectors and, in particular, to projectors for successively projecting a number of slides onto a screen.

The particular embodiment of the invention shown herein is an automatic slide projector in which the slides are arranged in a single magazine from which the slides may be successively displaced into projecting position and to which magazine each slide is returned after projection. However, certain aspects of the invention are equally applicable to non-automatic slide projectors.

The particular embodiment shown in one respect is an improvement of the automatic projector shown in the application of Conrad J. Peto, Serial No. 146,655, tiled February 28, 1950, now Patent No. 2,705,438, dated April 5, 1955. In other words, the projector embodies mechanism which is caused to operate in a cycle of operation which commences and terminates at a time when a slide is in projecting position. Thus, the interval between successive cycles, which interval can be controlled by the operator, is the time during which the slide is projected onto the screen. Such mechanism also embodies means for stopping the mechanism midway of the cycle of operation at the time when the slide has been returned to the magazine and prior to the displacement of the next succeeding slide therefrom. Thus, the magazine may be removed from the projector at a time when all of the slides are contained therein.

One object of the present invention is to provide in a projector of the type above outlined, an improved mode oi; operation, characterized by the terms semi-automatic, in which the interval between successive cycles is controlled by the operator, fully automatic in which the interval between successive cycles is automatically controlled, and manual in which the mechanism operates through only successive portions of a complete cycle, and in which the timing of said successive portions is under manual control.

Another object of the present invention is to provide improved cycling means to control the operation of the projector mechanism, which cycling means is adapted to operate according to any one of the three modes of operation outlined above.

Still another object is to provide a projector embodying pulse actuated control means whereby the projector can be electrically connected to a tape recorder or other external programming means to the end that the operation of the projector may be synchronized with the operation of said external device.

Still another object is to provide a slide projector having improved slide displacing or transporting means, and in particular, one in which the motion of the slide displacing elernents is essentially rotational, as contrasted with translational, thereby providing a more compact and commercially acceptable mechanism.

In this connection, a generally arcuate path is provided for the slide, but the rotating elements are so designed as to have a radius much less than the radius of the arcuate path, thus reducing the compactness of the mechanism to a greater extent than would result by the substitution of rotating elements for translating elements.

A still further object is to provide a magazine type of slide projector in which the magazine is oriented with respect to the projecting mechanism in such a manner that the slides, due to gravity, are automatically arranged in proper position for proper cooperation with other elements of the mechanism.

Still another object of the present invention is to provide a magazine type of projector embodying improved means for advancing the magazine.

Other objects are to provide, in a slide projector, an improved shutter, together with automatic means for operating the same, a novel and improved built in pointer, and improved magazine construction, and an improved lamp mounting means.

Other objects, features and advantages will become apparent as the description proceeds.

' With reference now to the drawings in which like reference numerals designate like parts:

Fig. 1 is a front elevation of a preferred embodiment of the invention;

Fig. 2 is a plan view thereof;

Fig. 3 is a left hand elevation;

Fig. 4 is a longitudinal vertical section taken substantially in the plane of the optical axis;

j Fig. 5 is an enlarged elevation, partially in section of the mechanism assembly;

Fig. 6 is a front elevation of the mechanism assembly;

i Fig. 7 is a detailed vertical section taken along line 7-7 of Fig. 23;

Fig. 8 is a vertical transverse section taken substantially along line 8-8 of Fig. 4;

Fig. 9 is an elevation similar to Fig. 8, but with certain parts omitted for the purpose of clarity, showing the slide transporting mechanism;

Fig. 10 is a view similar to Fig. 9 but showing the parts in a changed position;

Fig. l1 is a plan section taken substantially along line 11-11 of Fig. 9, but with certain parts omitted, showing the cam assemblies;

Figs. lla and 1lb are vertical sections taken along lines 11a and 11b, respectively, of Fig. ll.

Fig. 12 is a view corresponding generally to Fig. 1l, but showing certain of the parts in a changed position;

Fig. 12a is a detailed plan view showing the shape of the followers;

Fig. 13 is a vertical section taken substantially along line 13-13 of Fig. ll;

Fig. 14 is a detailed view showing the slide transporting arms;

Fig. 14a is a detailed plan view showing the shape of the end of one of the sli-de transporting arms;

Fig. 15 is a detailed view showing the shutter cam;

Fig. 16 is an enlarged vertical View taken substantially along line 16--16 of Fig. l5; t

Fig. 17 is a detailed view showing the.` magazine advance cam and its follower and associated link;

Fig. 18 is a left-hand elevation of the top tunnel member;

Fig. 19 is a plan view thereof;

Fig. 20 is an enlarged plan view of a portion of the tunnel assembly, the parts being inverted with respect t0 the view shown in Fig. 19;

Fig. 21 is a vertical sectional detal taken along line 21-21 of Fig. 20;

Fig. 22 is a right-hand elevation of the mechanism assembly, with certain parts being broken away, and also showing the complete tunnel assembly;

Fig. 23 is a detailed plan section taken substantiallv along the line 23-23 of Figs. 3 and 10;

Fig. 24 is a detailed axial section of the pinion assembly for advancing the magazine;

Fig. 25 is a plan sectiontaken along line 25-25 of Fig-.24;

Fig; 26 is a plan section taken along line 26--26 of Fig. 24;

Fig. 27 is an axial section of the cam assembly;

Fig. 28 is a vertical transverse section taken along line 281-28 of Fig. 27;

Fig.` 29 is a vertical section taken along line 29-29 of Fig. 27 showing the automatic cam;

Figs. 30 and 3l are plan and right-end views, respectively, of the automatic cam shown in Fig. 9 and showing the relationship of the three different sets of lobes;

Fig. 32 is aside view ofthe magazine;

Fig. 33 is a top view thereof;

Fig.34 is a vertical section taken along line 3434 of.

Fig. 35 is a longitudinal section taken along line 35-'-35 of Fig. 33;

Fig. 36 is an elevation of the shutter assembly;

Fig. 37 is an enlarged detailed vertical section takenV along line 37-37 of Fig. 36;

Fig.V 38 is an erd view of Fig. 36;

Fig. 39 is a detailed View showing one of the shutter blades;

Fig. 40 is a plan View of the slot and pointer plate subassembly, corresponding generally to the plan section of Fig. 23;

Fig. 4l is a front elevation thereof;

Fig. 42 is a rear elevation of one of the plate elements;

Fig. 43 is an end View of Fig. 42; and

Fig. 44 is an electrical diagram illustrating the relationship of certain of the parts.

The mechanism of the projector shown is mounted in, and partially enclosed by, a box-shaped casing 50, as shown in Figs. 4 and 8. Suitably secured to the upper edges` of the casing 50 is a closure member 51 which is in the form of a die casting which encloses the upper part ofthe mechanism. This closure member comprises a lamp chamber portion 52 at the left rear, a lens receiving portion 53 at the left front, and a tunnel portion 54 at theright. The terms left and right as used herein refer to left and right as viewed from the front, as in Fig. 1,` and the term longitudinal indicates the Ydirection parallel to the axis of the optical system.

Alens unit 55 is telescopically received within the lens receiving portion 53. A slide magazine 56 is received within the tunnel portion 54. A lamp 58, shown in Figs. 3 and 4, is suitably mounted in the lamp chamber portion 52, and a suitable cover 57 is disposed over this portion 52' as a light shield.. The space between the cover 57 and the upper edge of the lamp chamber portion 52 forms a slot serving as the intake for the air stream customarily used for cooling the lamp and lamp chamber. Y Grills 59, located at the front and side portions of the casing 50 serve as air outlets, and the air is caused to circulate by means of a blower 92` hereinafter described. As shown indotted lines in Figs. 4 and 8, a removable cover 60 may beprovided which cooperates with the casing 50 to completely enclose the projector when the same is not in use.

The casing 50 is provided with rear feet 61 and an adjustable front foot 62. A suitable control member 63 for the adjustable front foot 62 projects through the front surface into closure member 51, so that the angle of projection can be conveniently regulated. Similar adjusting means can be provided for one of the rear feet 61 to regulate the tilt.

Various operating elements project through the closure member 51, as follows: a focusing knob 64 for the lens unit- 55,a release button 65', a function knob 66, a slide selector knob 67, a switch knob 68 for the motor and lamp, a pointer knob 69, and a shutter control lever 70, alLasshown in Figs. 1 to 3. A slot 71 is also formed in the left side by means of which a slide, such as one element of a stereo slide may be manually inserted into the light path:

The optical system, as shown in Fig. 4, comprises a mirror 72, condenser lenses 73, and projection lenses 74. The complete mechanismassembly, which is enclosed within elements 50 and 51,-is shown in Figs. 5, 6, and 22. The frameworkcomprises aV vertical transverse plate 80,

a horizontally extending bridge member 81 secured thereto, and variousy other structural members, only some of which need be specicallyV mentioned. Most ofthese structural members may be formed from sheet steel, and secured to each other by rivets or welds..

As shown in Fig. 4, a vertical transverse closure plate S2 is secured to the bridge member 81- and cooperates with elements and 81 to form an enclosure 85 in which certain of the mechanism is located. In other words, comparing Figs. 6 and 8, the various cams, links and levers, shown in Fig. 8, are located behind the closure plate 82, shown in Fig, 6. Disposed within the enclosure 85 is an intermediate vertical plate 83, as shown in Fig, 4.

A bottcm plate 86, shown in Figs. 4, 5, and 8 is also providedv for theenelosure 85, and a motor supportl 87 is puro,--

vided forwardly and somewhat above the bottom plate 86.,

The mechanism assembly is suitably secured to the elef ments'r50 and 51 at various places, such as the flange 841 at the bottom of the vertical plate 80.

The drive means The mechanism is driven by means of a motor 90,v shown in Figs. 4, 5 and 6, which is mounted on the motor' support 87. A blower 92 is mounted at the lower end ofthe motor shaft 91l so as to be directly driven thereby.

Suitably journaled in bridge member 81 and the bottoni plate 86 are a clutch assembly 93 and a vertical shaft 94, the latter being provided with a worm 95. A pulley 96 forms-a part ofthe clutch assembly 93, andV itis/driven from the motor shaft 91by means of a belt 97. Suitable gearing 9S, shown in Fig; 5, causes the Averticalshaft 94 to be-driven from the-pulley. According to this arrangement, the blower, tlie pulley 93, the'vertcal shaft 94 and;y the worm l are directly and` continuously drivenjfromY bushing. 100 to provide a bearing for the upper end of thel bored shaft 102.

The pulley 96 is rotatably mounted on thereduced end portion 103 of the bored shaft 102, the pulley hub also including the first element of the gearing 98.

Clutch means Iare provided to provide a driving connectionbetween the pulley 96 and the bored shaft 102. This Clutch means includes a drive member 105 resiliently carried on thepulley 96, the drive member being provided with a suitable friction facing. A cooperating driven member 106 is sidably` mounted on-the bored shaft102,

and is caused to rotate with the shaft by means of a suit-V able pin 108 which passes through the driven member andV through a slot 107 formed in the bored shaft 102. Thedriven member 106 is also provided with a friction facing. A light spring may oe located within the borev of the bored shaft 102.which engages the pin 107 to urge the driven member 106 upwardly into disengaged position.

A rod 109 is received within the bored shaft 102 and bears downwardly against the pin 108 to cause operation ofthe clutch.

A horizontally extending tab 114. on the bridge member, provided with a suitable friction facing, engages the upper surface of the upwardly biased driven member 106 to serve as a brakefwhen the clutch is disengaged. Thus,V depression of rod 109 causes worm 1041to` be driven from,

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