EP 0299322 B1 19921104 - CONTROL SWITCH FOR A VACUUM CLEANER MOTOR FAN
Title (en)
CONTROL SWITCH FOR A VACUUM CLEANER MOTOR FAN
Publication
Application
Priority
DE 3723567 A 19870716
Abstract (en)
[origin: EP0299322A2] The control switch is designed in such a way that, by actuating a switch member, the rotational speed of the fan motor can be increased temporarily beyond the rotational speed corresponding to the permissible long-term capacity. It is ensured by a blocking mechanism that repeated increase in the rotational speed is only possible in each case after a predetermined recovery time. The control switch can be executed with few and simple components if the control signal of a hand-operated switch member (27) is fed directly to a timer (9) and further to the setting inputs (S) of two flip-flop members (10 and 11). In this control switch, the first output (22) of the timer (9) is connected to the resetting input (R) of the first flip-flop member (10). A switch element (19), which bridges the potentiometer connected directly to the control input of a semi-conductor switch element (15) arranged in the current circuit of the fan motor, is controlled by the output signal which appears on the non-inverting output (Q) of the first flip-flop member (10). The second output (23) of the timer (9) is connected to the resetting input (R) of the second flip-flop member (11). Connected between its inverting output (Q) and the control circuit (26) guiding the control signal of the switch member (27) is a blocking diode (29) which is directed with its passage direction towards the inverting output (Q). <IMAGE>
IPC 1-7
IPC 8 full level
A47L 9/28 (2006.01)
CPC (source: EP)
A47L 9/2842 (2013.01); A47L 9/2857 (2013.01); A47L 9/2894 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0299322 A2 19890118; EP 0299322 A3 19900214; EP 0299322 B1 19921104; AT E81957 T1 19921115; DE 3875660 D1 19921210; FI 84133 B 19910715; FI 84133 C 19911025; FI 881336 A0 19880321; FI 881336 A 19890117; NO 883150 D0 19880714; NO 883150 L 19890117
DOCDB simple family (application)
EP 88110661 A 19880704; AT 88110661 T 19880704; DE 3875660 T 19880704; FI 881336 A 19880321; NO 883150 A 19880714