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This quiz should help you find out what you know about the Barker lever. Please enter your name.

1. Cavaillé-Coll bought the rights to the Barker lever and used it without modification.

1. True
2. False
3. I have no idea.

2. Choose one.

1. The Barker lever is a form of pneumatic assist, using wind power to assist in moving objects under high wind pressure.
2. The Barker lever is a form of mechanical assist, using the principle of the lever to help move objects under high wind pressure.
3. The Barker lever is the first type of electric action used in organs.
4. I have no idea what the Barker lever is!

3. The first use of the Barker lever in Cavaillé-Coll's organs was in reducing the amount of force needed to open pallets in mechanical action instruments.

1. True
2. False
3. I have no idea.

4. Why was assistance needed to move objects in Cavaillé-Coll's organs?

1. Organists were physically weakened by the Revolution.
2. His organs used high wind pressures and larger pallets to conform to Napoleon III's regulations.
3. His organs used high wind pressures and larger pallets to provide the sounds he wanted.
4. I have no idea.

5. For what uses did Cavaillé-Coll eventually adapt the Barker lever? Check all that apply.

1. Key action.
2. Stop action.
3. Automatic playing mechanisms.
4. Couplers.