Ferranti Plc

Gec-marconi Avonics (holdings) Limited

Ian Graham Thom

Ian D Gooch

A helmet visor release apparatus has a pair of manually actuatable catches, each of the catches including a first portion to be disposed on a helmet; and a second portion to be disposed on a visor of the helmet. The first portion has an arrangement for releasably engaging the second portion, the arrangement for releasably engaging being manually actuatable for releasing the second portion from the first portion thereby releasing a corresponding one of the catches. The apparatus further includes a linkage mechanism connecting the catches to one another and being configured such that manual release of one of the catches causes a release of another one of the catches.

Helmet visor release apparatus

In film copying apparatus (FIG. 3) in which a master film 13 and unexposed copy film 13 are drawn past an exposure gate 12 by a drive sprocket 15, the sprocket teeth 16 have a curved profile which engage with film sprocket holes such that the upper film lags behind the lower and the copy is incorrectly aligned with respect to the sprocket holes. Film strip registration means for correcting misalignment at the exposure gate comprises suction means 20 having a vacuum chamber 21 with apertured pad 23 by which the copy film is diverted out of the plane of the master film thereby increasing its path length between exposure gate and drive sprocket and advancing it at the exposure gate to re-establish registration with the master film.

Growing community of inventors

Edinburgh, United Kingdom

Ian Graham Thom