| 1. | The two spring balance safety valves were located on the outer firebox.
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| 2. | The earliest types employed a simple spring balance attached to a pivoted bar.
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| 3. | It will be replaced by electronic and spring balances.
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| 4. | On the foremost boiler section was the steam dome with a safety valve and spring balances.
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| 5. | Brockway-Smith makes spiral spring balances, and you could order new ones through your local lumber dealer.
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| 6. | In your case the spring balances failed, perhaps because they were not strong enough or were defective.
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| 7. | Spring balances come in different sizes.
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| 8. | Some double-hung windows may have tubular-type spring balance or a spring-tape balance mechanisms to control the sash movement.
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| 9. | With a boiler pressure of, these were the first South African engines to use Salter spring balance valves.
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| 10. | The two spring balance safety valves were located on the steam dome and dome of the outer firebox.
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