Builder's hardware; a manual for architects, builders and house furnishers . le the piston isfastened to the door. It has been claimedthat after being used fora certain time, the bear-ings in both the Nor-ton and the Sargentdoer - check will wearloose, so that the airwill escape too freelyfrom the cylinders toform a reliable cushion;and several attemptshave accordingly beenmade to produce a door-check in which the action should be regulated by the flow of someliquid, which would permit of metal instead of leather 126 illustrates one device on this principle. It consistsof a pist
Builder's hardware; a manual for architects, builders and house furnishers . le the piston isfastened to the door. It has been claimedthat after being used fora certain time, the bear-ings in both the Nor-ton and the Sargentdoer - check will wearloose, so that the airwill escape too freelyfrom the cylinders toform a reliable cushion;and several attemptshave accordingly beenmade to produce a door-check in which the action should be regulated by the flow of someliquid, which would permit of metal instead of leather 126 illustrates one device on this principle. It consistsof a piston and cylinder attached to the door. The cylinder ispivoted so as to admit of a slight rocking motion, and thepiston is hinged to a bent-arm, also pivoted just above O, andprovided with a spring which serves to keep the piston drawnout. The cylinder is filled with oil, which flows back andforth through a small tube at the back, the rate of flow beingregulated by a screw at C. When the door closes, the shoulderA on the door-head strikes against the bent arm and forces the. Fig. 126. Houses Liquid Brittan. Liquid Door-Checks. 86 BUILDERS HARDWARE. Chapter vi. piston down, the oil preventing any sudden slamming, while the rate of the flow through the tube below G determines therate at which the door will close. This fixture retails at about$1 per set. Such a form of check necessitates a spring-hinge, in orderthat the door shall be self-closing. Figure 127 illustrates aform of door-check manufactured by the same parties, whichhas a coiled spring inside the cylinder acting by means of the
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
