Builder's hardware; a manual for architects, builders and house furnishers . it back, and a simpler springwhich bears against the ratchetconnection, so as to lock thelever when it is closed. Hop-kins & Dickinson manufacturea variety of this form, in which the spring-catch, has severalcuts or ratchets on its edge, and the catch on the lever isbevelled, so that it will be held by any one of the advantage claimed for this is, that if the lever is drawnaround hastily, it will be more likely to catch on the ratchetsand be locked, than the ordinary pattern, which has but asingle ratchet
Builder's hardware; a manual for architects, builders and house furnishers . it back, and a simpler springwhich bears against the ratchetconnection, so as to lock thelever when it is closed. Hop-kins & Dickinson manufacturea variety of this form, in which the spring-catch, has severalcuts or ratchets on its edge, and the catch on the lever isbevelled, so that it will be held by any one of the advantage claimed for this is, that if the lever is drawnaround hastily, it will be more likely to catch on the ratchetsand be locked, than the ordinary pattern, which has but asingle ratchet. This is known as the Ladd sash-fast. The Boston sash-fast has to be set pretty carefully inorder to be effective, and in the case of very excessive shrink-age, the space between the plates might be so reduced that theratchet would not hold the lever. Such difficulties would, ofcourse, arise only in a third-rate building. The form is be-lieved by many of the dealers to be the best in the market, andit surely answers very fully the requirements of a perfect Fig. I Metropolitan Newman. Chapter VIII. Spring LeverSash-fasts. Boston Pattern, 128 B UILDERS HARD WARE. Chapter VIII. A scarcely less admirable sash-fast is shown by Figure lever is on the lower sash, hooking under a tooth on theupper sash, which is bevelled so as to draw the sashes moreclosely together. A strong spring about the axle of the levertends to throw it open, while a smallbolt, inside the lever, locks into a con-cealed catch on the post or axle of thelever. The bolt ends in a knob, A, and
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