| 摘要 |
1,234,999. Magazine slide projectors. GAF CORP. Nov.15, 1968 [Nov. 20, 1967], No. 54412/68. Heading G2A. A motor-driven slide projector 34 of the kind disclosed in Specification 1,162, 592 has a rotary (or linear) magazine 10 mounted for forward or reverse indexing on upper wall 29 to bring a selected slide over a slot 29a through which the slide is first lowered to projection gate 37 for projection and subsequently raised by cam-operated lever 50, indexing teeth 30 on magazine 10 being engaged by an indexing gear 122 on the projector which is actuated by engagement with forward and reverse teeth 137, 138 (not shown), of member 136, there being a member 158 which is slidable to engage and lock gear 122 against rotation during projection, and which is operated by a spring connection with a member 147 which is driven to actuate indexing member 136. The members 147, 158 are driven by engagement with an ear 102 of a cam-driven reciprocating plate. Gate aperture 37 is formed in a transversely extending partition 38 and has on one side a fixed slide guide 39, and on the other side a guide 42 displaceable by cam-operated linkage 85, 80, 76 to free a slide for return to magazine 10 by lever 50. Displacement of member 76 retracts spring finger 23b in the slide compartment for reception of the slide. Random access to the slides is possible by means of an attachment which engages and drives the magazine through teeth 31, the indexing member 136 then being disabled. A shutter is actuated by a cam-operated rocker arm 57 in synchromism with the slide-changing mechanism. A latch engaging and holding the magazine on the projector is provided, and is controlled by a member movable to a first position in which the latch is freed and the indexing mechanism disabled, and a second position wherein the latch engages and the said mechanism is activated. |
