Patent · US Expired

Apparatus having an automatic firing arrangement

US5594312A · kind A · utility

8Cited by

14References

8Claims

0Family size

Assignee

Landis & Gyr Technology Innovation AG · CH

Inventors

Eckhard Schwendemann · Bühl, DE
Klaus Bott · Ludwigshafen, DE

Key dates

Filing date	Feb 28, 1995
Grant date	Jan 14, 1997
Priority date	—
Expiry date	Feb 28, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B30/70
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An automatic firing arrangement (1) has an apparatus for actuating a fan which is driven by a controllable-speed asynchronous motor (2). The apparatus includes a frequency converter (3) with which the speed of rotation of the asynchronous motor (2) is controllable, switching devices (6.1; 6.2; 6.3) by which the asynchronous motor (2) can be temporarily separated from the power supply for a predetermined period of time, and a measuring means (5) with which the speed of rotation and the direction of rotation of the asynchronous motor (2) can be detected by way of the generator action thereof in said period of time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.