Society of Glass Technology · [Sheffield] · leaf 485
he lens or to compensate for wear; for this purpose,the plate is mounted on an arm, 55a, Fig. 61, pivoted to the slideand pressed by a spring towards a vertical member, 57, forming abacking for the arm and carrying a screw, 58, for adjusting the 6—2 84 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY.… … 61a, pivoted on the spindle, a, whereby the plate presses againstthe templet. In order that the lens may be withdrawn from thegrinding-wheel when being swung over to operate on the oppositeside, the spindle, a, drives, through chain gearing, a cam, 69,carried by a spindle, 68, mounted in the…
Glass
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