公开(公告)号：US3881816A

公开(公告)日：1975-05-06

申请号：US43534674

申请日：1974-01-21

Applicant: US ARMY

Inventor： JENKINS ANDREW H ,  MORGAN ROBERT L ,  BENNETT RAYMOND P ,  DUGAS CHARLES E

IPC: G03B23/02 ,  G03B21/00

CPC classification number: G03B23/02

Abstract: A device to be inserted in a slide slot in a projector. The device having an end turned up at a substantially 45* angle so that slides having a corner keyed by clipping the corner on a line 45* from the bottom will only fit into the slide slot in one position.

Abstract translation: 要插入投影机的滑槽中的装置。 该装置的端部以大致45度的角度倾斜，使得具有通过在与底部45°的线上夹住角部的角部的滑块仅在一个位置处装配到滑动槽中。