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PLATE THREE
INTERLOCKING MECHANISM FOR POWER OPERATED MUZZLE DOORS

The two diagrammatic views shown on this chart illustrate the operation of the interlocking mechanism on submarine torpedo tubes equipped with power operated muzzle door mechanism.

1. The interlocks proper are comprised essentially of pieces B, C, E, F, I, N, O, P, Q, R, R1, T, W, and Y.

2. Interlocks B, E, R, and Y prevent the opening of the muzzle and breech doors at the same time. When the muzzle door is open, the interlock sleeve (B) precludes raising the breech and muzzle door interlock bolt (E) to free the breech door locking ring (D). With the breech door unlocked, a lug on the locking ring (D) obviates lowering the breech and muzzle door interlock bolt (E) to release the slide (Y) on the control valve operating handle. The hand shaft interlock (R1) is also held engaged with the muzzle door hand shaft (U).

3. Interlocks B, F, R1, T and X prevent the opening of the muzzle door and the drain valve at the same time. When the muzzle door is open, the interlock sleeve (B) precludes raising the drain valve interlock head (F) to unlock the drain valve through the interlock latch (T). If the drain valve is open, the interlock latch (T) prevents lowering the drain valve interlock head (F) to release the interlock (X) on the control valve operating handle. This restraint of the drain valve interlock head (F) also holds the hand shaft interlock (R1) engaged with the muzzle door hand operating shaft (U).

4. Interlocks B, C, I, N, P, Q, R and W prevent damaging the torpedo tube by firing when the mechanisms are not properly set. To make the tube ready to fire, the rotating sleeve (N) must be turned to align the hole in the shutter bar (I) with the piston rod of the firing mechanism torpedo stop cylinder (J). With the muzzle door closed, the interlock sleeve (B) obviates this alignment of the hole in the shutter bar and the piston of the torpedo stop cylinder by checking the firing interlock bolt (C), which in turn restrains the rotating sleeve (N). When the depth setting spindle is engaged, the interlock bolt (t) of the depth setting mechanism prevents rotation of the rotating sleeve (N). When the speed setting spindle is engaged, the speed setting mechanism interlock bolt (Q) prevents rotation of the rotating sleeve (N).

If the tube is ready to fire, the firing interlock bolt (C) engages and locks the finger (W) on the control valve operating handle. The hand shaft interlock (R) prevents rotation of the muzzle door hand operating shaft. The depth setting mechanism interlock bolt (P) checks engagement of the depth setting spindle, and the speed setting mechanism interlock bolt (Q) checks engagement of the speed setting spindle.



TUBE READY TO FIRE
(MUZZLE DOOR OPEN)

Tube Ready to Fire (Muzzle Door Open).
(A) Outer Slide Muzzle Door open Position
A Control valve operating handle Muzzle door open position
B Interlock sleeve Muzzle door open position
C Firing interlock bolt
D Breech door locking ring
E Breech and muzzle door interlock bolt Breech door locked position
F Drain valve interlock head
G Drain valve interlock lever in Drain valve locked position
H Firing interlock lever in Ready to Fire position
I Shutter bar
J Piston rod
K Interlock sleeve operating shaft
L Control valve operating finger
M Control valve Muzzle door open position
N Rotating sleeve
O Interlock drive and adjustment chain
P Depth setting mechanism Spindle locked out
Q Speed setting mechanism Spindle locked out
R R1 Hand shaft interlocks
S Interlock sleeve drive gear
T Interlock latch Drain valve locked closed
U Muzzle door hand shaft
V Muzzle door power shaft
W Finger on control valve operating handle
X Interlock on control valve operating handle
Y Slide on control valve operating handle
Z Clutch



TUBE READY TO LOAD
(MUZZLE DOOR CLOSED)

Tube Ready to Load, (Muzzle Door Closed)
(A) Outer Slide Muzzle Door Closed Position
A Control valve operating, handle Muzzle door closed position
B Interlock sleeve Muzzle door closed position
C Firing interlock bolt
D Breech door locking ring
E Breech and muzzle door interlock bolt Muzzle door locked position
F Drain valve interlock head
G Drain valve interlock lever in Muzzle door closed position
H Firing interlock lever in Muzzle door unlocked position
I Shutter bar
J Piston rod
K Interlock sleeve operating shaft
L Control valve operating finger
M Control valve Muzzle door closed position
N Rotating sleeve
O Interlock drive and adjustment chain
P Depth setting mechanism Spindle unlocked
Q Speed setting mechanism Spindle unlocked
R R1 Hand shaft interlocks
S Interlock sleeve drive gear
T Interlock latch Drain valve unlocked, open
U Muzzle door hand shaft
V Muzzle door power shaft
W Finger on control valve operating handle
X Interlock on control valve operating handle
Y Slide on control valve operating handle
Z Clutch



Chapter 4
Chapter 4
Sub Tubes Home Page
Sub Tubes Home Page
Chapter 5
Chapter 5


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Version 1.10, 22 Oct 04