Fig. 441. - Wrought Steel Blind Hinge.
In New England the blinds are generally hung on the outside of the casing, and the hinges consist of a half hinge on the edge of the blind and a hook driven into the face of the casing. Fig. 441 shows the more common type of such hinges, the position of the parts being that assumed when the blind is thrown open. Two sizes of plates are made, 2 and 2½-inch, the latter affording a more secure attachment
If there is a moulding on the casing, a wider hinge plate and longer hook must be used to throw the blind beyond the moulding, and hinges with 2 and 4-inch "throw" are made for this purpose, the hinge plate being of the shape shown at A. The hinge with
Fig. 442 shows a style of wrought steel hinge much used in New York City, where blinds are usually set flush with the outside casing. The angle plate is screwed to the outside face of the blind and serves to strengthen the latter as well as to give a firm attachment. The bend near the eye is to give a throw to the hinge. A similar hinge with a 4-inch throw is made for windows in brick buildings.
An objection that may be offered to all of these hinges is that the blind swings readily on them in any position, and a catch is required to hold them open and another to secure them when closed,
The more recent improvements in blind hinges, therefore, are in the way of hold back or "gravity" hinges as they are called, which lock the blind when thrown open, and prevent its slamming. There are several patterns of these gravity hinges in use, particularly in the Western States, and as a rule they have proved very satisfactory. Probably the simplest pattern is that shown in Fig. 443, which is forged from steel plates and hence is non-breakable and very inexpensive. When the blind is thrown back, the hook A, engages in the hole H, and securely locks the blind. To close the blind it is lifted bodily until the hook clears the hole, when it is readily swung too. The hook B, prevents the blind from being raised entirely from the hinge, and the two parts can be separated only when the blind is exactly at right angles with the house. The top and bottom hinges are exactly alike, and they can be used either right or left hand.
Fig. 442.-Wrought Blind Hinge. New York Style.
Fig - Stanley Gravity Blind Hinge.
The Stanley Works also make a heavier wrought steel hinge, which locks the blind by the action of gravity, and has also the unusual feature (for gravity hinges) of enabling the hinge to be unlocked without lifting the blind.
All other gravity hinges with which the author is acquainted, are made of malleable iron. Fig. 444 shows one of the latest patterns. One object in making this hinge was to obtain a hinge that would not project into the window opening when the blind is thrown back, thus leaving the entire opening between the architrave or casings clear for storm windows. A good feature of this hinge is that the screw holes are well back from the edge of the casing.
Both of these types of gravity hinges are made for blinds hung flush with the outside casings or architraves, as in Fig. 96, and they throw the blind only about ¾-inch away from the house. Several forms of malleable iron gravity blind hinges, designed for brick buildings, are used in the Western States, the Clark and Shepard giving perhaps as good satisfaction as any.
Awning Hinges. - Two or three styles of blind hinges have been patented which permit the blinds to be thrown out at the bottom like an awning, as well as to open and close in the ordinary way. One style, the automatic blind awning fixtures, has been very extensively used about Boston, and seldom fails to give satisfaction. The fixtures are sold with side bars to hold the bottom of the blind away from the building, and also with a device for fastening the blinds together. It permits the blinds to be used either way at will, and the operation is very simple.