Fig. 238.—Inside Hingeing: Method of Letting Butt Hinge into Door Frame and Carcase.
Inside Hingeing.—When a door is being hung inside the carcase (that is, not hinged over the ends) it is permissible, in the case of light work, to let the whole thickness of the hinge into the door; and when screwing the door to the carcase it is usual to fix the knuckle of the hinge flush with the face of the carcase, thus allowing the door frame to stand back, making a break of about 1⁄8 in. with the face. The marking gauge should be set to the full width of the hinge; the mark, gauged on the inside of the carcase end, thus forms a line to guide the worker whilst fixing the door. To successfully fix a door it generally requires two persons, one to hold the door in position, whilst the other bores the holes and fixes the screws.
Fig. 239.—Showing Top and Bottom of Carcase Cut Back to allow Door to Close.
| Fig. 240.—Outside Hingeing. | Fig. 241.—Section. |
[Fig. 238] shows the correct method of fitting butt hinges on high-class work. One wing of the hinge is let into the door, and the other wing is let into the carcase or door jamb, thus distributing a proportion of the weight to the carcase end instead of allowing the whole of the weight to be carried by the screws as would be the case in a, [Fig. 237]. The method of sinking each portion of the hinge into the door and carcase respectively is costly; hence it is not the general practice in cheap work. In [Fig. 239] the top and bottom of carcase (T and B) are shown set back to allow the door to close.
Outside Hingeing.—[Fig. 240] illustrates the portion of a door frame and carcase end when the door is hung on the face of the carcase. The correct method of letting in the hinge is shown in the enlarged section ([Fig. 241]), but, as previously mentioned, the hinge may have its entire thickness let into the door frame where it is of a light character. The door frame projects slightly over the carcase end, and occasionally a bead mould is worked on the edge of the door so as to give a finish and partly hide the joint. The bead would, of course, be the same size as the diameter of the knuckle of the hinge; and the knuckle, therefore, will form a continuation of the bead and give a workmanshiplike finish.
Fall Fronts.—[Fig. 242] is a sectional view of a fall front writing bureau fitted with centre or pivot hinges and arranged so that the edges form a stop when the desk front is turned to a horizontal position. The position for the fitting of the brass plates carrying the pivot-pin is somewhat awkward; but, by first sinking the plates into the carcase ends, and then slotting the edges of the fall, it will be found that the fall front may be put in from its horizontal position, and that sufficient room is left to enable the screwdriver to be manipulated without inconvenience.