Builder's hardware; a manual for architects, builders and house furnishers . Fig. 240. Standard ScrewBlind-fast. Stanley Works. Fig. 239. New York Pattern Blind-fast. Stanley Works. inner hook catches over instead of under the sill-staple, and isshaped like the hack catch of Figure 235, Fasts. Figure 240 shows a form of blind-fast which is screwed bodily through the blind, catching on sill and wall staples inthe same manner as the preceding styles. A flat springinside of the case keeps the inner hook constantly pressed upand against the sill-staple. A variationof this same patte
Builder's hardware; a manual for architects, builders and house furnishers . Fig. 240. Standard ScrewBlind-fast. Stanley Works. Fig. 239. New York Pattern Blind-fast. Stanley Works. inner hook catches over instead of under the sill-staple, and isshaped like the hack catch of Figure 235, Fasts. Figure 240 shows a form of blind-fast which is screwed bodily through the blind, catching on sill and wall staples inthe same manner as the preceding styles. A flat springinside of the case keeps the inner hook constantly pressed upand against the sill-staple. A variationof this same patternis made which actsby gravity, the catchworking in an obliqueslot in such a mannerthat the weight ofthe outer catch forces. Fig. 241. Security Blind-fast. Stanley Works. the inner catch always against the sill-staple. Figures 241 and242 illustrate two forms of fasts which are screwed to the SHUTTER-FIXTURES. under side of the blind. The former acts entirely by grav-ity. The lobes, A A, are connected through the case, andare counterbalanced so as to always drop to the position the blind is closed, the lobe strikes against the sill-pin
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