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Expired
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Herbert Barwell
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Individual
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Individual
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Publication of GB190709888ApublicationCriticalpatent/GB190709888A/en
9888. Barwell, H. April 29. Locks, key.-Gas cocks are automatically locked in the open or closed position by a spring- pressed bolt 6 engaging with a recess 9 in a circular flange 10 fixed to the plug. The bolt, which slides in a casing at the side of the valve, is retracted by a key 4 engaging a shoulder 14 formed on the bolt, which is also formed with a bead 13 to prevent the bolt from dropping out of the casing.
GB190709888D1907-04-291907-04-29Safety Locking Tap or Valve
ExpiredGB190709888A
(en)