Magazine-type slide projector

Claim 2

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardLy extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means whereby successive slides on said carrier are movable into a projection position extending outwardly through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into a precisely located operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; said guiding means including first V-shaped positioning elements on opposite sides of said magazine projecting away from said open end along opposite sides of said gate, and second positioning elements on said case forming V-shaped seats on opposite sides of said gate for receiving said first positioning elements and camming the same into preselected positions to guide said magazine into said operating position; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position.

Claim 3

A slide projector as defined in claim 1 in which said recess opens toward said projection gate through said top side, and said first V-shaped positioning elements are lugs secured to the lower edges of said magazine, and said second positioning elements define upwardly opening V-shaped seats for receiving said lugs and camming the latter and the magazine in a front-to-rear direction into said operating position while locating the magazine vertically as well.

Claim 4

A slide projector as defined in claim 2 in which said V-shaped seats have side surfaces engageable with the side surfaces of said lugs to locate the magazine laterally in said recess.

Claim 5

A slide projector as defined in claim 3 in which said recess is defined adjacent said top side of said case by surfaces that are spaced to receive said magazine with a loose clearance fit for free insertion of the magazine therein, said sides of said seats being more closely spaced than the corresponding surfaces of said recess adjacent said top wall to receive said lugs with a snug fit, and said second elements having upwardly and outwardly inclined cam surfaces for guiding said lugs into said seats.

Claim 6

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in said top side for receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently hoLding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; said magazine being inserted vertically in said recess, and said shaft being journaled on the magazine to extend across the lower end portion thereof, and said mounting means including a second shaft spaced above the first-mentioned shaft and supported for up and down sliding; a spring adjacent each end of the second shaft urging the latter upward to tension said carrier, said springs being elongated wires each anchored on the magazine and extending under said second shaft, and being stressed to raise the shaft and also to apply a light friction drag to the second shaft.

Claim 7

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in said top side for receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently hoLding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; said magazine being inserted vertically in said recess, and said shaft being journaled on the magazine to extend across the lower end portion thereof, and said mounting means including a second shaft spaced above the first-mentioned shaft and supported for up and down sliding; a spring adjacent each end of the second shaft urging the latter upward to tension said carrier, said springs being elongated wires each anchored on the magazine and extending under said second shaft, and being stressed to raise the shaft and also to apply a light friction drag to the second shaft.

Claim 8

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; said carrier comprising an endless flexible belt formed by a flexible strip of material having parallel end edges cut on a bias and fitted together, and a plurality of side-by-side transverse clips thereon parallel to said shaft and opening outwardly to receive and grip the edge portions of slides, said clips being bonded to said belt with several clips spanning the joint between said end edges and thereby holding said end edges together.

Claim 9

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; said carrier comprising an endless flexible belt formed by a flexible strip of material having parallel end edges cut on a bias and fitted together, and a plurality of side-by-side transverse clips thereon parallel to said shaft and opening outwardly to receive and grip the edge portions of slides, said clips being bonded to said belt with several clips spanning the joint between said end edges and thereby holding said end edges together.

Claim 10

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means whereby successive slides on said carrier are movable into a projection position extending outwardly through said end; said case having a recess In one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; and two lugs which project beyond said open end on opposite sides of said projection position, at least as far as the free edge of the slide in said projection position, to protect the slide while the magazine is out of the recess, said lugs constituting part of said means for guiding the magazine into said operating position.

Claim 11

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means whereby successive slides on said carrier are movable into a projection position extending outwardly through said end; said case having a recess In one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; and two lugs which project beyond said open end on opposite sides of said projection position, at least as far as the free edge of the slide in said projection position, to protect the slide while the magazine is out of the recess, said lugs constituting part of said means for guiding the magazine into said operating position.

Claim 12

A slide projector as defined in claim 7 in which said mounting means for said carrier also includes a second shaft adjacent the opposite end of the magazine, said opposite end being open and also having two lugs projecting outwardly beyond said opposite ends to protect slides projecting outwardly from the second shaft.

Claim 13

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means whereby successive slides on said carrier are movable into a projection position extending outwardly through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; means for sensing and signaling the beginning of the series of slides and thereby indicating when the full series on said endless carrier has been viewed, comprising a signal device on said case, an operator for said device in said case, and a clip mountable on one of said slides for engaging said operator and activating said device as said one slide enters said gate.

Claim 14

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carrier for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means whereby successive slides on said carrier are movable into a projection position extending outwardly through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into the proper operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operable drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; means on said magazine and in said case for coupling said output member to said slide carrier when said magazine is in said operating position thereby to feed successive slides on said carrier into said projection position; means for sensing and signaling the beginning of the series of slides and thereby indicating when the full series on said endless carrier has been viewed, comprising a signal device on said case, an operator for said device in said case, and a clip mountable on one of said slides for engaging said operator and activating said device as said one slide enters said gate.

Claim 15

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carriEr for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into a precisely located operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operably drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier automatically as said magazine is moved into said operating position thereby to feed successive slides on said carrier into said projection position, and including a quick-connect, quick-disconnect clutch between one end of said shaft and said output member, brought into coupling engagement as said magazine is moved into said operating position said clutch comprising a first clutch member on said output member having yieldable coupling elements projecting toward said magazine in coaxial relation with said shaft, and a second clutch member on the adjacent end of the shaft having recesses for receiving said yieldable coupling elements, said magazine having surfaces thereon for shifting said yieldable coupling elements out of the way as the magazine is inserted into said recess.

Claim 16

A slide projector having, in combination; a case having front, rear and top sides; an optical system housed within said case and including a lamp adjacent said rear side, and at least two lenses in front of said lamp, said lenses being spaced apart to define a projection gate and aligned with said lamp along an optical axis of the projector; a slide magazine having a boxlike body open at least at one end and including an endless slide carriEr for holding a series of slides in outwardly extending relation with said carrier, said carrier being mounted in said body for movement along an endless path by mounting means including a shaft extending across said open end whereby successive slides on said carrier are movable into a projection position extending outwardly away from said shaft through said end; said case having a recess in one side thereof receiving and holding said magazine with said open end adjacent said projection gate and with a slide in said projection position disposed in said gate between said lenses; means on said case and said magazine for guiding the latter into a precisely located operating position relative to said axis as an incident to the insertion of the magazine in said recess, and subsequently holding the magazine in said operating position during projection of slides; selectively operably drive mechanism in said case having a rotary output member movable step by step through preselected increments when said mechanism is operating; and means on said magazine and in said case for coupling said output member to said slide carrier automatically as said magazine is moved into said operating position thereby to feed successive slides on said carrier into said projection position, and including a quick-connect, quick-disconnect clutch between one end of said shaft and said output member, brought into coupling engagement as said magazine is moved into said operating position said clutch comprising a first clutch member on said output member having yieldable coupling elements projecting toward said magazine in coaxial relation with said shaft, and a second clutch member on the adjacent end of the shaft having recesses for receiving said yieldable coupling elements, said magazine having surfaces thereon for shifting said yieldable coupling elements out of the way as the magazine is inserted into said recess.

Claim 17

A slide projector as defined in claim 10 in which said first clutch member is a hub turned by said output member, and said yieldable coupling elements are balls supported in bores in said hub and spring urged toward said shaft, said hubs having means thereon for retaining said balls against complete displacement from said hub.