Suction-type matrix drier with means for controlling drying time and suction

Claim 1

MATRIX DRYING MECHANISM COMPRISING A FRAME, A SUCTION BOX ON SAID FRAME HAVING A PERFORATED WALL, A WIRE SCREEN FITTED ON SAID PERFORATED WALL, A COVER MEMBER HINGED TO SAID FRAME AND SWINGABLE FROM AN OPEN POSITION TO A CLOSED POSITION OVER SAID SCREEN, A PUMP FOR DRAWING AIR FROM SAID BOX, A MOTOR OPERATIVELY CONNECTED TO SAID PUMP, A CIRCUIT CONNECTING SAID MOTOR TO A SOURCE OF POWER, A NORMALLY OPEN MICROSWITCH IN SAID CIRCUIT, SAID SWITCH BEING CLOSABLE BY CLOSING MOVEMENT OF SAID COVER, A MANUALLY OPERABLE STARTER SWITCH ON SAID FRAME, A NORMALLY CLOSED MICROSWITCH OPERABLE BY CLOSING MOVEMENT OF SAID COVER CONNECTED IN SERIES WITH SAID MANUALLY OPERABLE SWITCH, SAID NORMALLY CLOSED SWITCH AND MANUALLY OPERABLE SWITCH BEING CONNECTED IN SAID MOTOR CIRCUIT IN PARALLEL WITH SAID NORMALLY OPEN SWITCH.