Material: 3/16" and 1/2" sheet
This is an excellent jig-saw design, quite inexpensive in point of weight because of the way it uses "air" in the design, yet indicating great bulk as it appears to be a solid block 2 3/4" thick, high and nearly 7" long, exclusive of the base, which could be omitted. The pleasing pattern of alternating strips and crystal flitter base is shown in Figure 57, is laid out on the 3/16" and 1/2" sheet and band-sawed and jig-sawed out, cemented together, sanded and finished all around. Incidentally the weight could be cut considerably further by using two 3/16" sheet of contrasting color instead of the 1/2" sheet for one color, and the base omitted if the depth of the clock-works permit this. The hole for the clock-works can be jig-sawed, cut on the lathe or bored with fly-cutter, of any appropriate size under 3 1/2", the face being cemented over the hole. Means of mounting the works will depend on the type used. Hands may be cut out of sheet brass, and soldered to the shanks which come with the works. If the saving of the waste indicated in the pattern of the 3/16" sheet is not important, and you have some scrap of the same color lying about (1 1/4" x 5"). the three (left-end) strips indicated at "A" in Figure 57 can be cut from this scrap, and the back of the cldck made a solid sheet, with holes left to provide access to the winding and setting keys or with the keys protruding. This would also provide additional strength in case the base is not used and also give protection to the works. Any pleasing combination of colors can be used, black, white or ivory, and lipstick red or Capucine red being merely suggestions.
Fig. 57. Pattern and finished sketch of the clock described in Project 44. The clock can be made with or without the plastics base, or with a wooden base.
Materials: #3 cyl.; 1/2' trans, sheet.
This is an adaptation of a striking design seen in a Fifth Avenue shop, which can be made by making use of any of the transparent colors of plastics, preferably clear sapphire blue, for the lens. The "works" are from a dollar watch, the base turned from a short section of the thick #3 cylinder, with a narrow shoulder into which is fitted the lens, turned from clear sapphire, to the dimensions shown in Figure 58. The hour-figures are Roman, and cut with a triangular file into the edge of the cylinder before assembly, and wiped over with white quick-dry lacquer. This is done after turning, buffing and polishing. The lens must have a uniform curvature, as otherwise there will be distortion. The cross-slides of most metal-working lathes can be swivelled through this arc, but even free-hand turning on a woodworking lathe should not be difficult, as the "rate" of curve is not important—only its uniformity. The hands represent a little delicate cutting-out and soldering work, which might best be left to the watchmaker if you do not succeed after the first trial. They are cut from thin sheet brass to the shape shown, and enamelled white. The globe design is then laid in with black india ink. The watch mechanism is attached to a brass disc which sets in a deep shoulder turned up from the bottom of the cylinder, and held in either with drive-screws or with a dab of cement overlapping the brass in three or four places. The mechanism is attached to the brass disc by the most convenient means, depending on its construction, a suggestion being given in the sketch, but care must be taken that the clamping means do not twist the frame and cause binding of the wheels. Winding is taken care of by soldering an extension the proper length onto the stem, consisting of a 3/16" round rod, knurled on the exposed end. The brass face is smoothed, sanded with 8/0 sandpaper, and given a coat of light blue dull-finish lacquer, after which a few stars are added with white. Deep blue, blue marble or black is suggested for the cylinder-color.
Fig. 58. Details of the desk clock in Project 45. The base is a short section of the heavy No. 8 cylinder, with turned shoulders on the top to hold the crystal-lens and on the bottom to take the works. Actual dissensions depend partly on the works.