PLATES.

PLATE I.

Service Torpedo.—Pattern D.

A barrel.

B lower head.

C upper ”

g, h splices between leading-wires and detonator-wires.

K handle.

l lugs for handle.

k ” ” spindle.

i, i screw-holes for attaching circuit-closer.

n screw-rib for screw-cover.

r projection on handle shipping into spindle.

t screw-bolts securing spindle to lugs.

H spindle.

L spar leading-wires.

M water-cap.

P primer-case.

O screw-cover.

w rubber washer.

G spherical rubber packing.

D, D dry gun-cotton primer.

x detonator.

Y wet charge.

PLATE I.

PLATE II.

Exercise Torpedo.—Pattern D.

c case.

d lower loop.

e, e loops for transportation thumb-screw and for spindle.

f throw-back hinge with thumb-screw.

H spindle.

O cover.

w rubber washer.

M water-cap.

G spherical rubber packing.

Y, Y, Y, Y wet charge.

D, D, D, D dry primer.

x detonator.

L spar leading-wires.

g, h splices between leading-wires and detonator-wires.

PLATE II.

PLATE III.

Circuit-closer.—Pattern B.—Contact Torpedo.

A hollow brass casting.

M water-cap.

G spherical rubber packing.

O, O feet for attaching circuit-closer to service torpedo, Pattern D.

B inner brass plunger.

C spiral spring.

N ebonite collar.

I, I binding-posts.

E contact-springs.

t screw-cover.

s, s contact arms.

K outer plunger.

l safety-pin.

V rubber diaphragm.

k friction-plate.

PLATE III.

PLATE IV.

SECONDARY SPARS.

Fig. 1, Ship‘s.—Pattern A.

A main spar.

B secondary spar.

a, a spar-bands.

b key-way.

c key.

l hole for torpedo-pin.

m torpedo-pin.

PLATE IV.

Fig. 2, Boat‘s.—Pattern A.

R main spar.

H secondary spar.

i butt.

k cap.

g toggle.

l hole for torpedo-pin.

m torpedo-pin.

PLATE V.

Contact Spar leading-Wires.—Pattern B.

B battery.

C contact torpedo.

x circuit-closer.

D contact spar leading-wires.

H hand-firing key.

S safety-break.

PLATE V.

PLATE VI.

Spar-Torpedo Boat-fittings.—Pattern B.

S heel-rest.

H swivel-crutch.

R cross-beam.

D ” bearing, riveted to cross-beam and bolted through rail.

E elevating-arm.

m plate washer.

n nut on end of securing rod.

G guide-ring.

K gear on elevating-arm.

M worm.

N worm-shaft, forward length.

O ” ” after ”

X hook-coupling.

P elevating-wheel.

Q clutch.

L detaching-lever.

T torpedo.

A main spar.

B secondary spar.

PLATE VI.

PLATE VII.

Junction of Tubes Forming Boat‘s Spar.—Pattern A.

A large tube.

B small tube.

c, c rings.

d shoulder.

e screw-holes.

f feather.

g score.

PLATE VII.

PLATE VIII.

Fig. 1, Detonator.

A copper case.

B plug.

c, c detonator-legs.

D bridge.

F gun-cotton priming.

H fulminate of mercury.

Fig. 2, Detonator Block.

A block.

B ” cover.

C, C detonators.

D, D tin box.

PLATE VIII.

Fig. 1.

Fig. 2.

PLATE IX.

Fig. 1, Permanent Wires.

A, A electric switches (on bulwarks under bridge).

B, B forward terminals.

C, C after ”

D, D forward permanent wires.

E, E after ””

G, G permanent wires leading from bridge to lower binding-posts of electric switches.

H, H wires leading from bridge to common-return terminals, below switches.

K terminal on bridge for wires H, H.

L, L” ” ” ” ” G, G.

X firing-battery connected to terminals on bridge.

Fig. 2, Connections with Firing-key of “A” Machine.

B, B terminals of firing-key.

T, T ” ” ”

Key “T” test key.

Key “F ” firing key.

M, M wires to terminals L, L on bridge. (Fig. 1.)

N wire to terminal K on bridge (common return). (Fig. 1.)

O, O machine-connecting wires.

Fig. 3, Connections with Firing-battery.

B, B terminals of battery.

M, M wires to terminals L, L on bridge. (Fig. 1.)

N wire to terminal K on bridge (common return). (Fig. 1.)

H hand-firing key.

Plate IX.

Fig. 2.

Fig. 3.

Fig. 1.

PLATE X.

Fig. 1, Electric Switch.

A permanent wire to forward torpedo.

B ”” ” after ”

C, C ”” common return.

D wire to battery or firing-key of machine.

E commutator of switch.

PLATE X.

Fig. 1.

Fig. 2, Terminal.

H binding-screw.

I permanent wire.

w wire temporarily connected.

Fig. 2.

PLATE XI.

Heel-fittings for Ship‘s Spar.

a ship‘s spar.

b thrust-plate (30″ diameter).

c eye-bolt through thrust-plate and ship‘s side.

d heel-bolt.

Plate XI.

Fig. 2.

Fig. 1.

PLATE XII.

Ship’s Spar Fittings.

a ship’s spar.

b topping lift.

c forward guy.

d after ”

e span for topping lift (16′ long).

f ” ” forward guy (16′ long).

x, x, x, x bands on spar (5′ apart).

PLATE XII.

PLATE XIII.

Battery Cell.

a okonite jar.

b, b zinc cylinder.

c platinum plate.

d muslin bag filled with crushed carbon.

e ebonite disc.

f ” plug.

g sal-ammoniac solution.

h positive terminal.

i negative ”

k rubber cover.

r rubber ring.

PLATE XIII.

PLATE XIV.

Battery Tester.

a, a battery terminals.

b ” tester.

c fuze-bridge in tester.

PLATE XIV.

PLATE XV.

Fig. 1, Hand-firing Key.—Pattern B.

a, a hickory pieces.

c, c contact studs.

L, L leading-wires.

d rubber cot.

e safety-pin with hole for laniard.

f eye-bolt for laniard.

Fig. 2, Diagram Showing Hand-firing Key in Circuit.

B battery.

H hand-firing key.

w, w leading-wires.

PLATE XV.

PLATE XVI.

Fig. 1, “A” Machine and Firing-key Connected.

A “A” machine.

C firing-key.

B, B terminals of firing-key.

T, T ”” ”

Key “T” test key.

” “F” firing-key.

O machine-connecting wires.

w, w wires to torpedo.

Fig. 2, “C” Machine Connected.

D “C” machine.

C firing-key (in the machine).

Key “T” test key.

” “F” firing-key.

w, w wires to torpedo.

PLATE XVI.

Plate XVII.

Fig. 1, firing-key, short-circuit.

” 2, ”testing circuit.

” 3, ”firing-circuit.

O, O machine-connecting wires.

w, w wires to torpedo.

B, B terminals of firing-key.

T, T ” ” ”

Key “T” test key.

Key “F” firing-key.

PLATE XVII.

Fig.1.

Fig.2.

Fig.3.

PLATE XVIII.

Steam-drier.

Plate XVIII.

Fig. 1.

Fig. 2.

Footnotes: