Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-08-14
2007-08-14
Lee, Benjamin C. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S686300, C340S438000, C340S445000, C073S168000, C200S061250
Reexamination Certificate
active
10920939
ABSTRACT:
The present invention provides a pressure alarm for use in conjunction with conventional pressure gauge unit systems, as a replacement pressure gauge and alarm, or as a pressure alarm system. The invention provides adaptable alarm feedback signals for an operator, preventing the unexpected loss of pressure when using a gas cylinder, pressure boiler, or other device. The invention provides an alarm that may be a visual, audible, electronic, or mechanical low-pressure alarm and may include a means of ordering replacement supplies or sending a warning message. A system controller and memory module prevents false alarms and eases the burden of the operator while allowing external input and control.
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Clear-View Pressure Switch, McMaster-Carr Catalogue 2003, p. 510.
Differential Pressure Switches with Dial Gauge, McMaster-Carr Catalogue 2003, p. 511.
Improvements Cataloge, Hanover, PA, 17333-0084, May 2003, p. 68, “179626 LP-Tank Safety Gauge”.
Smith (Arcsmith Company) Advertizement for Smith Equipment Replacement Pressure Gauge having a warning display range, page unknown, located from company.
Greenspan Myron
Isaacs Michael S.
Lackenbach & Siegel LLP
Lee Benjamin C.
Previl Daniel
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