Builder's hardware; a manual for architects, builders and house furnishers . ure 108. Thisbutt, however, has many excellent qualities. It consists of fourseparate springs, two on each side. It will be seen by theplan that when the door is opened the tension is brought on thesprings by aid of the push-bar or pin, A, which fits on theshoulder between the two springs and on a ratchet attached to the central springs can easilybe released from theirtension without takingoff the door, by simplyremoving the push-bar,and, owing to the man-ner in which the springsare attached, they ex-e
Builder's hardware; a manual for architects, builders and house furnishers . ure 108. Thisbutt, however, has many excellent qualities. It consists of fourseparate springs, two on each side. It will be seen by theplan that when the door is opened the tension is brought on thesprings by aid of the push-bar or pin, A, which fits on theshoulder between the two springs and on a ratchet attached to the central springs can easilybe released from theirtension without takingoff the door, by simplyremoving the push-bar,and, owing to the man-ner in which the springsare attached, they ex-ert their greatest pow-er when the cloor isclosed, the force grad-ually decreasing as thedoor is opened. An-other good quality isthat, as there are foursprings, if their com- ybined power is too\Y^p^ great for the door, any one of them can be re-leased singly, withoutaffecting the action ofthe others, and thetension of the spring brought to any point. It is alsopossible to replace a spring without taking the butt off thedoor, something which can be done with very few other. Fig. 1086. Jewett St. Egge Mfg. Co. HINGES. 71 makes. The only objection to the hinge in our mind is that it cnapter v.
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