Builder's hardware; a manual for architects, builders and house furnishers . each, according to thefinish. Figure 128 is another form of combined door check andspring, which is intended especially for double-acting doors,though it can be used for any door. No regular hinges are re-quired with this fixture. The top of the door is held by aspecies of pivot, fitting into a socket mortised into the top ofthe door, while the door-check answers for the lower lever A is mortised into the bottom of the door, acting asa crank to turn the post B. The checking apparatus is en-cased in a box G,
Builder's hardware; a manual for architects, builders and house furnishers . each, according to thefinish. Figure 128 is another form of combined door check andspring, which is intended especially for double-acting doors,though it can be used for any door. No regular hinges are re-quired with this fixture. The top of the door is held by aspecies of pivot, fitting into a socket mortised into the top ofthe door, while the door-check answers for the lower lever A is mortised into the bottom of the door, acting asa crank to turn the post B. The checking apparatus is en-cased in a box G, which is sunk into the door-sill and coveredwith a brass plate. Figure 129 shows a section of the box, whichwill illustrate more clearly its arrangement. The post B, when DOOR SPRINGS, CHECKS, AND HANGERS. 87 turned either way, moves a piston which travels in a cylinder Chapter iilled with oil, in which is also a very heavy coiledspring whose action tends to close the door, while the oil pre- /«// end ofJprmd stationary Kr-l vi n i-\ -n tr\ n r-i TT. 5a^^^W^^SSV\^S\W^^V-).V^^^^^^^VV^V>^VVV^^vJvN TPoinr of fontac ~C>lale- rtreweo1 ^o under ~^j i c/e op- do <
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
