Question

The main function of rocker mechanism is to help --------

1. Colour indication ribbon
2. Step by step movement
3. Tab setting
4. Thumb wheel

• A. 2 only
• B. 4 only
• C. 3 only
• D. 1, 2

Answer 1

Answer:

A. 2 only

• Four main parts of Rocker Mechanism are

         * Loose dog    * Rigid dog    * Escapement wheel     * Pinion wheel

• The main function of rocker mechanism is to help Step by step movement
• A rectangular portion seen below the escapement wheel is known as dog block
• Two dogs are there in dog block : 1. Loose dog  2. Rigid dog
• Movement of the carriage is controlled by loose dog and rigid dog