| 摘要 |
<p>A projection screen for the projection of cine film or transparencies is of the type wherein the support has a tripod at its lower end and an elongated casing 1 containing the screen 2 is fixed to a handle 14 which is movable vertically upon the support. Complementary means are provided, such as of the screw 3 and key-hole 12 type, on the casing and on the support, to allow the casing and contained screen to be rapidly detached from the support for use upon a wall or suspended from a ceiling. The screen may be a two-faced screen, in which case fixing means are provided on each side of the casing. <IMAGE></p> |
