Combined noxious gas detector and monitoring unit

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Description

FIG. 1 is a left front perspective view of a combined noxious gas detector and monitoring unit showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D121084 June 1940 Warner
D134171 October 1942 Dauster
D175591 September 1955 Darr
D242531 November 1976 Guimond
3090871 May 1963 Gorman
3999440 December 28, 1976 Kain
Patent History
Patent number: D251287
Type: Grant
Filed: Nov 29, 1976
Date of Patent: Mar 13, 1979
Inventors: Joseph C. Delfino (Mamaroneck, NY), Sydney Krivin (New City, NY)
Primary Examiner: Nelson C. Holtje
Attorney: Roberts B. Larson
Application Number: 5/745,662
Classifications
Current U.S. Class: Chemical (12) (D10/81); Measuring, Regulating Or Indicating Instrument, Or Casing (D10/46)
International Classification: D1004;