Scientific American Supplement, No. 520, December 19, 1885 eBook

This eBook from the Gutenberg Project consists of approximately 117 pages of information about Scientific American Supplement, No. 520, December 19, 1885.

Scientific American Supplement, No. 520, December 19, 1885 eBook

This eBook from the Gutenberg Project consists of approximately 117 pages of information about Scientific American Supplement, No. 520, December 19, 1885.

The end of the lever should be finished with a wood block, as Fig. 6, larger than the pin on the lid, as represented by L and M, Fig. 3.

The block may be of other material, but should be colored the same as the wood the box is made of, so that, if any one were to look down on it, no suspicion would be aroused, as might be were plain brass used.

[Illustration:  FIG 4.]

[Illustration:  FIG 5.]

In Fig. 5, I show an easy way of hanging the lever.  It is simply a piece of wire sharpened and notched, so as to form several small barbs, preventing withdrawal.  The mode of fixing will be easily understood by reference to B and C, Fig. 5.  Some considerable amount of care will have to be bestowed on fitting and adjusting this part of the work, on which the successful performance of the trick consists, and before finally fixing up, it should be ascertained that all the movements work harmoniously.  It will be best to cut the groove in which the lever works from below, and, after the lever is fixed, to fill up the space not required by the lever with strips of wood, H, H. If preferred, the space can be shaped out from the back, i.e., the inside of the framing, and then filled where not required, but as this, however neatly done, would show a joint which might be detected by sharp eyes, it is better to cut from below, though more troublesome.

The end containing the movable panel being arranged, make up the rest of the box to it, taking care to make the rebates of the top and bottom frames to correspond with those of the end.

The other panels should not, however, depend on the grooves on two sides only, but at tops and bottoms as well.

[Illustration:  FIG. 6.]

[Illustration:  FIG. 7. & FIG. 8.]

[Illustration:  FIG. 9.]

The rebates are to be cut only to have all the framing inside look alike; and as the panel, B, is made to fit quite close into the rebate, it will not be surmised that it is not fitted in the usual way.

After the box is made and fitted together, the clamping must be done.  The only necessity for this is in order that the bolt, D, which we have seen is made on the outside end exactly to match the screws used to fasten the clamps, should not be conspicuous, as it would be were it alone.  As it is, it will not be specially observable, being apparently only one of the screws to fasten the clamps.

The clamps may be of thin brass or iron, shaped as shown at Fig. 9.  One of the corner holes must be arranged to cover D exactly, and the others regulated to it.  Let us suppose that A, Fig. 9, is the one through which the bolt goes; the other corner screw holes must be equally distant from the edges of the clamps.  Twelve of these clamps will be needed.  After they have been screwed on, put the bolt through, and let the claw of the lever hold it in place.  Then mark and cut the bolt flush with the clamp, making a hollow on the end of it to imitate the screws, as D, Fig. 4.  The other end of the bolt should either be made flush with the inside of frame and colored to match it, or, better, cut short and faced flush with a piece of wood to match the framing.

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Scientific American Supplement, No. 520, December 19, 1885 from Project Gutenberg. Public domain.