EP 0181787 B1 19890830 - ELECTRO-MECHANICAL CONTROLS FOR VENTILATORS AND METHODS EMPLOYING SAME
Title (en)
ELECTRO-MECHANICAL CONTROLS FOR VENTILATORS AND METHODS EMPLOYING SAME
Publication
Application
Priority
GB 8429010 A 19841116
Abstract (en)
[origin: EP0181787A2] An electro-mechanical ventilator control mechanism comprises a rotary actuator (19) operable to move a control arm (1) to open and close the ventilator via a force transmitting member (10) formed in two sections (4, 5), normally retained telescoped one within the other by an electromagnetic device (2, 3) mounted on the section (4) and an electromagnetic keeper plate (4) mounted on the section (5), spring means (7) being provided pulling on the end of the member (10) and tending to open the ventilator. De-energisation of the electromagnetic device (2, 3) e.g. under the control of an automatic fire ventilating system, releases the keeper plate (4) and allows the ventilator to open under the action of the spring (7). Subsequent operation of the rotaray actuator (19) and re-energisation of the electromagnetic device (2, 3) re-sets the ventilator for automatic operation. Instead of a rotary actuator (19) a linear actuator (20) may be used.
IPC 1-7
IPC 8 full level
A62C 2/24 (2006.01)
CPC (source: EP)
A62C 2/247 (2013.01); F24F 11/76 (2017.12); F24F 11/34 (2017.12); F24F 11/35 (2017.12)
Designated contracting state (EPC)
AT BE CH DE FR LI NL
DOCDB simple family (publication)
EP 0181787 A2 19860521; EP 0181787 A3 19870304; EP 0181787 B1 19890830; AT E45885 T1 19890915; AU 4991485 A 19860522; AU 578762 B2 19881103; DE 3572596 D1 19891005; GB 2167552 A 19860529; GB 2167552 B 19880928; GB 8429010 D0 19841227; GB 8528182 D0 19851218; NZ 214205 A 19890224; ZA 858735 B 19860730
DOCDB simple family (application)
EP 85308334 A 19851115; AT 85308334 T 19851115; AU 4991485 A 19851114; DE 3572596 T 19851115; GB 8429010 A 19841116; GB 8528182 A 19851115; NZ 21420585 A 19851115; ZA 858735 A 19851114