Richardson's handbook of projection (1927)

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MANAGERS AND PROJECTIONISTS 731 Loosen, but do not remove, the six screws which hold the cover of the casing, whereupon the weight of the loosened ff ' > \x^ — mm JBI 11 ' ^'"' TpS3T | F ' i i %■ it £l£? fl EflMj f / 1 1^1^:21 Simplex Double Bearing Intermittent Movement and Sprocket. Figure 266.