Making a Portable Lamp.
[Illustration: Fig. 80.]
In Figure 80 is represented a portable lamp. This kind of lamp can be
made in various sizes with one light. The lamp shown in the illustration,
consists of two parts; the standard, and the shade, which can be removed.
The standard consists of a box-shaped bottom, with a pipe screwed into it
for the upright piece. The arms that the shade rests on, are separate
and are held in position by the lamp socket, which is screwed down on
them. The strips running over the bottom of the base and up the pipe are
riveted in place to support the pipe. This gives the whole standard a
more substantial appearance, and relieves the plain round pipe.
[Illustration: Fig. 81. Fig. 82.]
[Illustration: Fig. 83. Fig. 84.]
[Illustration: Fig. 85.]
In making a very simple lamp of this character, we may eliminate the
strips running up the pipe, and make the bottom with a round pipe screwed
into it. Of course a square standard would be more in keeping with the
square base and shade. In making the box-shaped base, soft steel should
be used. Figure 81 shows the dimensions of the flat stock. The plate is
heated and an inch of the edge is bent over the outer edge of the anvil,
as shown in Figure 82. The outer edges of the plate can be bent over the
end of the anvil as shown in Figure 83. When all the edges are bent the
piece will look somewhat as in Figure 84. The corners are now ground
off, and the bottom is made level. A hole is drilled in the center and
threaded for a ¾-in. steam pipe. Two inches from the center hole, another
hole is drilled and tapped for a ¼-in. or ⅜-in. rubber bushing. In wiring
the lamp, the cord should enter thru the bushing from the outside, and
under and up thru the pipe to the socket. The drawing for the pipe is
shown at Figure 85, also a bushing which is brazed into the top of the
pipe and threaded for a ⅛-in. pipe. The ⅛-in. steam pipe and bushing are
shown in position in the illustration at one end of the pipe. This small
pipe is for the lamp socket to be screwed onto. The other end of the
large pipe is to be threaded and screwed into the base. The pipe should
be screwed into the base far enough, so that the threads will not be
exposed to the outside and the surplus cut off. The pipe when screwed
tight should be brazed to the base. In doing this, the borax and spelter
should be applied to the under side, after the base is well heated, as
the brass will discolor the iron on the top side. When the pipe is brazed
it should be made to stand vertical.
[Illustration: Fig. 86. Fig. 87.]
[Illustration: Fig. 88. Fig. 89.]
In Figure 86 is shown the lamp standard with the shade support in
position. The support has a hole in the center to fit the ⅛-in. steam
pipe at the top of the standard. When the support is in place another
⅛-in. hole is drilled thru it into the pipe. A pin is driven into the
hole so that the support cannot be moved around. The lamp socket when
screwed down makes the support tight. In making the support the center
part is cut from a plate ³⁄₁₆ in. by 4 by 4 in. and ³⁄₁₆ in. round soft
steel bars are welded on for the arms. In Figure 87 is shown the drawing
which does not need explanation. The drawing for the pattern is shown at
Figure 88 and the pattern for one section at Figure 89. In developing the
pattern which is very simple the top drawing, Figure 88, represents the
shade which should be drawn full size. The length from A to B is then
laid off on the center line of the pattern, which in this case measures
7½ in. The top and bottom of shade shows a return of ⅜ in. which should
be added to the length of the pattern. The width of the top and bottom
of the shade is then drawn, also diagonal lines which will complete the
pattern. The edge view of the pattern is shown at C. The ⅜-in. bend
at the top is made so that the cap can be riveted on. The one at the
bottom is to receive the glass. This was explained on a previous page in
describing the making of a hall lantern. In assembling the shade, corner
angles are used to fasten the sections together, which was also explained
for the hall lantern. The top cap is put on last and fastened with rivets.
[Illustration]
INDEX
Annealing, 77
Annealing high speed steel, 81
Anvil, construction of, 10
how to fasten, 11
tools, 13
Awl, scratch, 78
Ball hammer, 13
Bessemer process, 65
Blast, control of, 27
Bolts, heading, 55
making of, 54
Bottom fuller, 17
Bottom swage, 16
Braiding, 96
Brazing, 36
Butt welding, 31
Candle-stick, making of, 104
Case hardening, 76
Cementation process, 66
Center punch, use of, 13
Chain links, welding of, 48
Chasing, 109
Chisels, hot and cold, 15
making of cold, 70
Coal, method of handling, 19
Cold Chisel, use of, 15
Coloring steel, 77
Crucible steel, making of, 66
Cupping tool, 55
Door knocker, making of, 110, 113
Door latch, making of, 99
Drawer pull, making of, 107
Expansion of iron, 59
Eye-pin, use of, 103
welding of, 43
Eyes, welding of hinge, 102
Fagot welding, 23, 37
File, used for inlaying, 128
Fire, making of forge, 18
cleaning of, 19
Fire shovel, making of, 97
Flatter, use of, 15
Fluting tool, 86
Flux and its uses, 21
Forge, the, 7
tools, 10
Forging a cold chisel, 70
Forming a loose eye, 40
Fuller, 16, 118
Gate hook, forging of, 55
Grab hook, making of, 52
Grilles, making of, 87, 91
Hammer, ball, 13
danger of, 25
modeling, 87
proper way to hold, 27
round-faced modeling, 137
set, 15
sledge, 13
sledge, danger, 71
Hammock hook, making of, 41
Handle, twisted poker, 94
Hardening cold chisel, 72
Hardie, 13
Hat and coat hook, making of, 117
Hay hook, making of, 57
Heading tool, 15
Heating, method of, 22, 27
Hinge, making of, 101
Horn, 56
Hot chisel, 15
Inlaying, 125
Jump welding, 30, 120
Lamp, portable, making of, 139
wall, making of, 137
Lamp ceiling cap, 137
Lamp shade, making of, 143
Lantern, assembling, 133
fittings of, 135
making of, 130
Links, open, 47
S, 42
Open hearth process, 65
Perforated decoration, 112
Pig iron, making of, 64
Puddling, 64
Punch block, 51
Punch, hand, 13, 79
used for inlaying, 127
Punching, method of, 50
Repousse, 112
Scarf, correct and incorrect, 26
theory of, 25
Scarfing, meaning of, 24
Scraper, 10
Scroll, volute, 89
Separate heat weld, the, 24
Shovel handle, making of, 96
Shears, kinds of, 18
Snip shears, 131
Spring tempering, 74
Staples, 46
Steel, annealing of, 77, 81
Bessemer process, 65
case hardening, 76
cementation, 66
crucible, 66
high speed, 80
Steel, making of, 65
open hearth process, 65
temper colors of, 68
tempering of, 67, 75
welding of, 76
Stock, storage of, 17
Swages, 16
Swage block, 17
Tempering thin steel, 75
Toasting fork, making of, 124
Tongs, danger in handling, 15
making of, 60
Tools, anvil, 13
center punch, 79
cupping, 55
eye-pin, 103
flatter, 15
forging, 10
fuller, for deepening lines, 16, 118
hand punch, for heavy punching, 79
hardie, 13
heading, 15
horn, 56
punch for inlaying, 127
punch block, for cutting holes, 51
round-faced hammer, 137
scraper, 10
scratch-awl, 78
snip shears, 131
swages, 16
Top fuller, 16
Top swage, 16
Tuyere, 9
Twisting, 93
handles, 94
Upsetting, 24
Vise, 17
Volute scroll, making of, 89
Wall hook, making of, 122
Welding, bolt heads, 54
butt, 31
chain links, 48
corner, 34, 36
electric, 22
eye-pins, 43
fagot, 23, 37
heat, determining, 28
hooks, 41
jump, 30, 120
lap, 29
making the, 27
method of, 20
oxy-acetylene gas, 23
ring, 39, 57
scarf, 24
scroll, 91
separate heat, 24
split, 32
steel, 76
T, 34
Wrought iron, finish of, 42
manufacture of, 64
Wrought iron leaf, making of, 85
Wrought iron work, 83
[Illustration]