Question

Consider the following reasons of shuttle loom stoppage. P. Breakage of warp yarns
Q. Entrapment of shuttle inside the shed
R. Flying of shuttle out of the shed
S. Slackening of a warp yarn
The correct combination that triggers the warp protector motion is

• A. P and Q
• B. Q and R
• C. R and S
• D. S and P

Hint:

Remember: \textbf{Warp stop motion} is for yarn breakage or slackening, while \textbf{warp protector motion} is for shuttle-related faults such as entrapment or flying out of the shed.

Answer 1

The Correct Option is B

The warp protector motion in a shuttle loom is designed to protect warp threads and the loom when the shuttle does not pass properly through the shed.
Its function is to detect shuttle-related faults and stop the loom before damage occurs.
Let us analyze each option step by step:
Step 1: Breakage of warp yarns (P).
This condition is detected by the warp stop motion, not the warp protector motion.
Hence, (P) does not trigger warp protector.
Step 2: Entrapment of shuttle inside the shed (Q).
If the shuttle gets trapped inside the shed, it can damage warp threads and the reed.
This condition {does} activate the warp protector motion.
Step 3: Flying of shuttle out of the shed (R).
If the shuttle flies out or misses its path, the loom must be stopped immediately to prevent damage or accidents.
This is also a direct trigger for warp protector motion.
Step 4: Slackening of warp yarn (S).
Slackening or breakage of warp yarns is again handled by warp stop motion, not warp protector motion.
Correct inference: The warp protector motion is triggered by Q and R.