Methods of locking sliding glass doors are shown in 267:5, 6. Figure 267:5 is a ratchet-bar lock for glass thickness from5/32 in (4 mm) to 5/16 in (8 mm), and requires no drilling as the ratchet bar assembly is thumb screwed to the leading edge of the rear glass in any convenient position. The detachable lock is slid on to this bar and prevents either door being moved. Figure 267:6 is a plan drawing of a cylinder type which passes through a hole drilled in the front glass and is secured with a nut and set screw; the projecting circular bolt shoots out to bear against the edge of the rear glass, thus preventing any movement of either.
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