Title: Locking means for gas valves

Abstract: The present invention is a protective shroud to prevent unauthorized operation of a gas cock controlling the supply of gas used for industrial purposes or other large volume use. The device is fixed to the valve or cock by key-operated locking means coupling the valve stem to the body of the valve.

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Inventors: Nielsen, Jr., Anker J. (Holden, MA, US)

Application Number: 684671
Filing Date: 1976-05-10
Publication_date: 1977-12-13
Assignee:
Primary Class(es): 70/178 70/186
Other Classes:
US Patent Ref:

1003211	Sep, 1911	Shepard	70/178.
1459688	Jun, 1923	Parkinson	70/178.
1571669	Feb, 1926	Hompe	70/176.
1795839	Mar, 1931	Credle	70/175.
2016797	Oct, 1935	Burns et al.	70/176.

Other Refs: 540,5771,115,063

Dec, 1931	DD
Oct, 1961	DT

Primary Examiner: Foss, J. Franklin
Assistant Examiner:
Attorney: Randall; Robert K.