Detector with adjustable sampling tubes

Details Detector with adjustable sampling tubes Detector with adjustable sampling tubes

1997-07-30

1998-12-01

Raevis, Robert

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7386481, G01N 120

Patent

active

058441484

ABSTRACT:
An adjustable sampling tube construction for a duct-mounted smoke detector includes telescopic tube sections which can be fixed in overall length by a screw extending through an outer tube to fix an inner tube with respect to the outer tube. The inner tube includes air sampling holes spaced apart along its length and the outer tube includes a plurality of spaced apart through holes having a same spacing to register with the sampling holes of the inner tube. The inner tube is telescopically positionable within the outer tube to register the sampling holes with the through holes to provide air sampling locations throughout a length of the combined inner and outer tube assembly.

REFERENCES:
patent: 2475857 (1949-07-01), Reinert
patent: 3538748 (1970-11-01), Linsell et al.
patent: 3595087 (1971-07-01), Starks
patent: 3803921 (1974-04-01), Dieterich
patent: 5625156 (1997-04-01), Serrels et al.
HVAC Installer's Notes, System Sensor.TM., a Division of Pittway.
Installation and Maintenance Instructions, DH400ACDC Air Duct Smoke Detector, System.RTM., a Division of Pittway.

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