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Blinds Fittings for Doors

butts, butt, door, hinge, hinges, wear and steel

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FITTINGS FOR DOORS, BLINDS, AND SHUTTERS Hinges and Butts. Among the various fit tings for doors, possibly the most important are the hinges or butts used in hanging the door in place. The term "hinge" properly applies only to one or the other of two forms—either the strap hinge or the T-hinge shown in Fig. 1. The old-fashioned hinge found now on old struc tures in some parts of the country, was a hand forged strap with an eye turned up at one end to fit down over a pin in the end of a large sharp pointed piece driven into the framework which was to hold the swinging member. This form of hinge is passing out of existence except for orna mental purposes; and even then, forms are often used which are fastened to the doors and casings in connection with the ordinary butt, giving the appearance of the old-fashioned strap.

Blinds Fittings for Doors

The two forms of hinges shown in Fig. 1 are used on barns, sheds, gates, and in places where a cheap hinge is wanted.

Butt

from their location be tween the door and casing—are the common form of hinge used in building. The importance of choosing a good butt is not always realized, nor does the builder always consider the amount of wear and strain which comes upon this im portant piece of hardware. The satisfactory ac tion of a door depends largely upon the hinges used for it to swing upon. These will be sub jected to a certain amount of frictional wear, de pending upon the location of the door and its weight. A very small amount of wear on the bearing surfaces of the butts on a door will be noticeable in a short time, from the door either sticking or sagging. To provide against this pos sible defect, butts should be chosen of sufficient size for the weight of the door; and care should be taken that the "thrust" on the bearing sur faces is distributed over a sufficient number of "knuckles" so that wear is not in any particular place. In butts of brass and bronze, or the softer metals, the wearing surfaces are protected by steel washers, and often by steel washers on the seat surface and steel cylinders surrounding the pins. Grooves or pockets are cut in the faces between the two rubbing sur faces in order to hold a small supply of some form of lubricant to lessen the wear. A type of

butt has appeared on the market, its object being the same as in the cases men tioned above. It is a five-knuckle butt, with the ball-bearings placed on each side of the middle knuckle.

Butts for doors are of various types, and are made of various materials. Cast-iron butts are the cheapest and least durable. The use of this form of butt should be avoided whenever pos sible, and adopted only when the first cost of a house is considered. The damage and incon venience which may arise from a broken cast iron butt can hardly be estimated. Cast-iron butts come in all finishes, and are often bronze plated to imitate solid bronze.

Wrought steel butts are possibly the best moderate-priced butts used. Ordinarily they are well designed, and the strength and dura bility of steel makes them appropriate for a great many uses. This material will also take all finishes, especially the Bower-Barff (see below under "Finishes for Hardware").

Cast butts of brass and bronze are used in heavy work, but are very expensive. Where a Bower-Barff finish is desired in massive work, heavy cast-iron hinges of good quality are used.

In all of the above metals, care should be taken to notice the thickness and weight of hinges, as there is a tendency on the part of some manufacturers to use too light metal in large butts. The cheaper grades of cast-iron butts—and, in fact, other articles of cheap hard ware—are generally covered with quite elabo rate designs and figures. Plain finish is in bet ter taste, and almost without exception signifies a better quality of material.

The types of butts in common use are loose pin, and butts. The loose pin butt shown in Fig. 2 is a good type of butt to use for ordinary house doors. The pin in this type of butt is loose, and may be lifted out when necessary to unhinge the door. As will be no ticed in the figure, this butt has five knuckles, thus always providing two bearing surfaces in each butt. It is also reversible; that is, either half of the butt may be fastened to the casing and will support the other half. Butts having less than five knuckles should not be used. Pro vision is made at the ends of the pins to prevent the pin from working up and out of the butt.

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