Stack-type slide changer for use with a slide display device having a gate open at the top thereof

Claim 2

In a slide changer for use with a slide feed magazine wherein a plurality of slides are held in face-to-face relation, the improvement comprising, first means adjacent one end of said magazine defining an opening for allowing passage of a slide therethrough only when said slide occupies a first angular position in its own plane, second means forming part of said magazine for supporting slides therein such that each slide occupies a second angular position in its own plane which is different from said first angular position, and cyclically operable means including a pair of movable members arranged to engage edges of the foremost slide in said magazine adjacent opposite corners of such slide thereby to rotate the latter in its own plane from said second position to said first position.

Claim 3

A slide loader for use with a slide display device having means defining a projection gate which is open at the top thereof for permitting passage of a slide in its own plane to and from said gate, said loader comprising: a. a feed magazine for supporting a plurality of slides in face-to-face contact and at an elevation above said gate; b. said magazine including supporting means for holding the slides therein such that each slide occupies a first angular position in its own plane; c. means disposed substantially over said gate and adjacent one end of said magazine for defining an opening allowing passage of a slide therethrough only when such slide occupies a second angular position in its own plane which is different from said first angular position; d. cyclically operable means including movable means for engaging edge portions of the foremost slide in said magazine for swinging the same in its own plane from said first to said second position whereupon such slide may pass through said opening; and e. other means for causing movement of said foremost slide through said opening and into said projection gate.

Claim 4

A slide loader for use with a slide display device having means defining a projection gate which is open at the top thereof for permitting passage of a slide in its own plane to and from said gate, said loader comprising: a. a feed magazine for supporting a plurality of slides in face-to-face contact and at an elevation above said gate; b. said magazine including supporting means for holding the slides therein such that each slide occupies a first angular position in its own plane; c. means disposed substantially over said gate and adjacent one end of said magazine for defining an opening allowing passage of a slide therethrough only when such slide occupies a second angular position in its own plane which is different from said first angular position; d. cyclically operable means including movable means for engaging edge portions of the foremost slide in said magazine for swinging the same in its own plane from said first to said second position whereupon such slide may pass through said opening; and e. other means for causing movement of said foremost slide through said opening and into said projection gate.

Claim 5

The slide loader according to claim 3 wherein a substantial portion of said plate is in parallel relation with the slides in said magazine, said plate having a lip engageable with the lower edge of thE slide for releasably holding the same in cooperation with said fixed means.

Claim 6

The slide loader according to claim 3 further defined by: a. a takeup magazine; and b. catch means in the takeup magazine and cooperating with said plate such that a slide is forced into the takeup magazine by said plate upon shifting movement of the latter in releasing another slide for dropping into said gate.

Claim 7

The slide loader according to claim 2 wherein said movable means include a pair of elements engageable with edge portions of said foremost slide adjacent opposite corners thereof.

Claim 8

In combination: a. a slide projector having a projection gate and slide changing means including a slide tray indexing member and a slide releasing member, the latter being adapted to cooperate with a slide tray for releasing slides one at a time therefrom; b. a slide loader for use with said projector alternately with said slide tray, which loader includes means defining a feed magazine wherein slides are supported in face-to-face contact; c. said loader including release means for allowing passage of said slides one at a time to said projection gate; d. first means coupling said indexing member to said release means for moving the latter from a hold position thereby to release a slide; and e. second means coupling said releasing member with said release means to return the latter to said hold position.

Claim 9

In combination: a. a slide projector having a projection gate and slide changing means including a slide tray indexing member and a slide releasing member, the latter being adapted to cooperate with a slide tray for releasing slides one at a time therefrom; b. a slide loader for use with said projector alternately with said slide tray, which loader includes means defining a feed magazine wherein slides are supported in face-to-face contact; c. said loader including release means for allowing passage of said slides one at a time to said projection gate; d. first means coupling said indexing member to said release means for moving the latter from a hold position thereby to release a slide; and e. second means coupling said releasing member with said release means to return the latter to said hold position.

Claim 10

The combination according to claim 7 further defined by: a. said loader including fixed means defining an opening through which a slide may pass only when the same occupies a first angular position in its own plane; b. said feed magazine including means for supporting said slides therein such that each slide occupies a second angular position in its own plane which is different from said first angular position; c. said release means including movable members engageable with edges of the foremost slide in the feed magazine for rotating the same in its own plane from said second position to said first position; d. said release means also including a shiftable element for momentarily holding a slide adjacent said projection gate after said slide has passed through said opening; and e. said first means coupling said indexing member to said shiftable element and said second means coupling said releasing member with said movable members.

Claim 11

The combination according to claim 8 further defined by: a. a takeup magazine; and b. catch means in the takeup magazine cooperating with said shiftable element such that a slide is forced into the takeup magazine by said element upon shifting movement of the latter.

Claim 12

A slide changer for use with a slide display device of the type including a vertical projection gate open at the top thereof for entry and exit of a slide, said changer including: a. a slide feed magazine for supporting a plurality of slides in vertical face-to-face relation and at an elevation above said gate; b. pusher means in the magazine urging slides therein toward one end of the magazine; c. first means adjacent said one end of the magazine and disposed substantially over said gate for defining an opening allowing passage of a slide therethrough only when said slide occupies a first angular position in its own plane; d. second means forming part of said magazine for supporting slides therein such that each slide occupies a second angular position in its own plane which is different from said first angular position; e. rocking means engageable with edge portions of the foremost slide in said magazine, which rocking means are movable back and forth between extended and retracted positions, movement of rocking means from the retracted position to the extended position serving to rock said foremost slide from its second position to its first position thereby to allow the same to pass through said opening; f. shiftable means mounted over said gate and movable back and forth between a hold position and a release position, said shiftable means being adapted in its hold position to receive said foremost slide after the same passes through said opening thereby to hold such slide over said gate, said shiftable means upon movement toward its release position serving to allow the foremost slide to drop into said gate; and g. operating means coupling said rocking means and said shiftable means for moving the latter to its hold position substantially simultaneously with movement of the former to its extended position and for moving the rocking means to its retracted position substantially simultaneously with movement of said shiftable means to its release position.

Claim 13

A slide changer for use with a slide display device of the type including a vertical projection gate open at the top thereof for entry and exit of a slide, said changer including: a. a slide feed magazine for supporting a plurality of slides in vertical face-to-face relation and at an elevation above said gate; b. pusher means in the magazine urging slides therein toward one end of the magazine; c. first means adjacent said one end of the magazine and disposed substantially over said gate for defining an opening allowing passage of a slide therethrough only when said slide occupies a first angular position in its own plane; d. second means forming part of said magazine for supporting slides therein such that each slide occupies a second angular position in its own plane which is different from said first angular position; e. rocking means engageable with edge portions of the foremost slide in said magazine, which rocking means are movable back and forth between extended and retracted positions, movement of rocking means from the retracted position to the extended position serving to rock said foremost slide from its second position to its first position thereby to allow the same to pass through said opening; f. shiftable means mounted over said gate and movable back and forth between a hold position and a release position, said shiftable means being adapted in its hold position to receive said foremost slide after the same passes through said opening thereby to hold such slide over said gate, said shiftable means upon movement toward its release position serving to allow the foremost slide to drop into said gate; and g. operating means coupling said rocking means and said shiftable means for moving the latter to its hold position substantially simultaneously with movement of the former to its extended position and for moving the rocking means to its retracted position substantially simultaneously with movement of said shiftable means to its release position.

Claim 14

The slide changer according to claim 10 wherein said rocking means comprises a pair of elements arranged to engage the foremost slide only at the edge portions thereof adjacent opposite corner of such slide.

Claim 15

The slide changer according to claim 10 wherein said shiftable means comprises a vertical plate.

Claim 16

The slide changer according to claim 10 further defined by: a. a takeup magazine for supporting slides at an elevation over said gate, the inlet end of said takeup magazine being disposed substantially over said gate; and b. said shiftable means serving to force a slide into the takeup magazine upon movement of the shiftable means to its release position.

Claim 17

The slide loader according to claim 2 further defined by: a. said other means including a shiftable plate mounted over said projection gate; b. fixed means mounted adjacent said opening and cooperating with said plate for releasably holding a slide over said gate; and c. actuating means for shifting said plate thereby to release the slide for dropping into said gate.