Builder's hardware; a manual for architects, builders and house furnishers . Fig. 3 17. Front-Door Lock. P. & the Hopkins & Dickinson locks, they are used a great dealon all kinds of work. It is a satisfaction to know that thereis one corner of this country where careful, conscientious workcan command its own price, in the face of the competitionwhich exists in the hardware trade. FRONT-DOOR LOCKS. The greatest amount of care and ingenuity has been ex-pended upon the locks which are used for the front-doors ofdwelling-houses, and the largest degree of complication is 202 BUILDERS HAR
Builder's hardware; a manual for architects, builders and house furnishers . Fig. 3 17. Front-Door Lock. P. & the Hopkins & Dickinson locks, they are used a great dealon all kinds of work. It is a satisfaction to know that thereis one corner of this country where careful, conscientious workcan command its own price, in the face of the competitionwhich exists in the hardware trade. FRONT-DOOR LOCKS. The greatest amount of care and ingenuity has been ex-pended upon the locks which are used for the front-doors ofdwelling-houses, and the largest degree of complication is 202 BUILDERS HARDWARE. Chapter xi. usually found in these goods. They afford, generally speaking,a greater security against picking than do the locks which areemployed for inside-doors. The conditions of an outside-doorlock are that it shall have two sets of mechanisms operated bykeys, to move either bolt or latch at will, and shall have the. Fig. 3 I 8. Mortise Knob-Lock. P. & F. Corbin. knob-spindle so arranged that the latch can be moved by turn-ing either knob, and that the outside knob can be made im-movable, while the inner one is free to move. Front-doors areusually two inches or more thick, and the lock can consequently FROXT-DOOR LOCKS. 203 be made quite thick, so as to permit of multiplication of thelevers, and a stronger mechanism than for inside-doors. Afront-door lock should always have an anti-friction 317 shows a formof front-door lock manu-factured by P. & F. Cor-bin. This is fitted withan anti-friction strike,has four levers forboth the lock and thenight-latch. The followis in two pieces Whenthe small catch on theface-plate over the latchis pressed to one side,the lever, A, is movedso as to fit in a slot onthe side of the outsidefollow, as shown by thefi g u r e , thus holdingthe follow, and with it theoutside-knob and spindle,so they cannot be night-key operatesby first lif
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