Lap dissolve slide projector

Claim 2

A slide projector adapted to be loaded with a slide tray provided with a row of slide compartments in which respective slides are carried in a predetermined projection sequence, said projector comprising: two slide gates in which individual slides may be received; means for selectively projecting an image of a slide received in one of said gates and an image of a slide received in the other of said gates; means for mounting and for shifting a slide tray loaded onto said projeCtor to align said row of slide compartments thereof alternately with one of said slide gates and with the other of said slide gates; means for indexing the slide tray loaded on to said projector to align different ones of said slide compartments thereof with the one of said slide gates aligned with said row of slide compartments; and means for transferring said slides in said projection sequence from their respective slide compartments into reception by alternate ones of said slide gates and for returning each such slide from its slide gate to the respective slide compartment which it previously occupied in said tray after an image of that particular slide has been projected by said projection means.

Claim 3

The invention according to claim 1 wherein said tray shifting means comprises cam means for imparting reciprocal movement to said slide tray.

Claim 4

A slide projector adapted to be loaded with a rotary slide tray provided with a circular row of radially disposed slide compartments in which respective slides are carried in a predetermined projection sequence, said projector comprising: two slide gates in which individual slides may be received; means for selectively projecting an image of a slide received in one of said slide gates and an image of a slide received in the other of said gates; means for mounting and for shifting a rotary slide tray loaded onto said projector to align said circular row of slide compartments thereof alternately with one of said slide gates and with the other of said slide gates; means for rotationally indexing the slide tray loaded onto said projector to align different ones of said slide compartments thereof with the one of said slide gates aligned with said row of slide compartments; and means for effecting the transfer of a slide between its respective slide compartment of said rotary slide tray loaded onto said projector and the slide gate with which that particular slide compartment is then aligned.

Claim 5

A slide projector adapted to be loaded with a rotary slide tray provided with a circular row of radially disposed slide compartments in which respective slides are carried in a predetermined projection sequence, said projector comprising: two slide gates in which individual slides may be received; means for selectively projecting an image of a slide received in one of said slide gates and an image of a slide received in the other of said gates; means for mounting and for shifting a rotary slide tray loaded onto said projector to align said circular row of slide compartments thereof alternately with one of said slide gates and with the other of said slide gates; means for rotationally indexing the slide tray loaded onto said projector to align different ones of said slide compartments thereof with the one of said slide gates aligned with said row of slide compartments; and means for effecting the transfer of a slide between its respective slide compartment of said rotary slide tray loaded onto said projector and the slide gate with which that particular slide compartment is then aligned.

Claim 6

The invention defined by claim 3 including actuating means for driving and coordinating the operation of said projection means, said tray shifting means, said tray indexing means and said slide transfer means such that successive ones of said slides are thereby transferred out of their respective slide compartments in said slide tray loaded onto said projector and into alternate ones of said slide gates in said predetermined projection sequence and are thereafter returned automatically to their same respective slide compartments after images of those slides have been projected in said predetermined projection sequence by said projection means.

Claim 7

The invention defined by claim 4 in which said actuating means includes a plurality of cam members adapted to rotate in unison and a plurality of cam follower members operatively connecting respective ones of said cam members with said projection means, said tray shifting means, said tray indexing means and said slide transfer means to effect coordinated operation of those means in response to rotation of said cam members.

Claim 8

The invention defined by claim 3 in which said projector is adapted to support said slide tray horizontally above said slide gates, and to transfer slides vertically between said slide tray and said slide gates.

Claim 9

A projector according to claim 3 adapted to be loaded with a slide tray including a disc member for retaining slides in their respective compartments in said slide tray, said disc member including an opening with which different ones of said slide compartments can be aligned to allow a slide to be moved to and from the particular slide compartment with which said opening is aligned, said projector including disc orienting means engageable with said disc member of said slide tray loaded onto said projector to locate said opening therein in alignment with the one of said slide gates with which said circular row of slide compartments is then aligned.

Claim 10

A slide projector according to claim 7 in which said projection meanS includes lap dissolve means for gradually decreasing the intensity of the projected image of a slide received in one of said slide gates as the projected image of a slide received in the other of said slide gates gradually increases in intensity, thereby providing uninterrupted transition between the projected images of successive slides received in alternate ones of said slide gates.

Claim 11

In a slide projector including: two slide gates in which individual slides may be accommodated; two projection lens assemblies located respectively in optical alignment with corresponding ones of said slide gates to project images of respective slides accommodated thereby; lens support means supporting said lens assemblies for independent focus adjusting movement; and image alternating means for alternating the projection of such images between one of said lens assemblies and the other of said lens assemblies; the improvement comprising: lens focusing means selectively connectable with either of said lens assemblies to effect focus adjusting movement of the particular lens assembly with which said lens focusing means is so connected; focus adjustment selector means operable to connect said lens focusing means automatically with the one of said lens assemblies that is projecting an image of a slide; a slide tray provided with a row of aligned slide compartments in which respective slides are carried in projection sequence; means for shifting a slide tray loaded onto said projector to align said row of slide compartments thereof alternately with one of said slide gates and with the other of said slide gates; and means carried by said slide tray shifting means for operating said focus adjustment selector means.

Claim 12

In a slide projector including: two slide gates in which individual slides may be accommodated; two projection lens assemblies located respectively in optical alignment with corresponding ones of said slide gates to project images of respective slides accommodated thereby; lens support means supporting said lens assemblies for independent focus adjusting movement; and image alternating means for alternating the projection of such images between one of said lens assemblies and the other of said lens assemblies; the improvement comprising: lens focusing means selectively connectable with either of said lens assemblies to effect focus adjusting movement of the particular lens assembly with which said lens focusing means is so connected; focus adjustment selector means operable to connect said lens focusing means automatically with the one of said lens assemblies that is projecting an image of a slide; a slide tray provided with a row of aligned slide compartments in which respective slides are carried in projection sequence; means for shifting a slide tray loaded onto said projector to align said row of slide compartments thereof alternately with one of said slide gates and with the other of said slide gates; and means carried by said slide tray shifting means for operating said focus adjustment selector means.

Claim 13

The invention according to claim 9 wherein said slide tray shifting means comprises a carriage for supporting said slide tray member, said focus adjustment selector means comprises a switch for selectively connecting said lens focusing means to one of said lens assemblies, and said means for operating said focus adjustment selector means comprises at least one projection carried by said carriage.