shut off remotely in case of an emergency condition application_number US 72843091 A description in the figures linkages are utilized which enable a butterfly valve 10 to be controlled manually by a push pull cable 12 push pull cable 12 can set butterfly valve 10 to any position between fully open and fully closed when such motion is applied by a operator as shown by the directional arrows adjacent the numeral 12 in fig4 indicator 14 as shown in fig3 provides a measure of the opening in degrees the linkage and spring means associated with butterfly valve 10 are operative to close butterfly valve 10 when solenoid 18 controlled solenoid pin 42 is withdrawn upon withdrawal of solenoid pin 42 shown in fig4 clevis locking link 24 rotates about pivot pin 26 which movement releases cable clevis pin 16 and disengages cable clevis 20 as shown in fig5 and 6 thus terminating manual control of butterfly valve 10 and allowing spring 28 under tension to rotate locking lever 22 about shaft 40 said lever 22 being pivotably connected to butterfly valve 10 such that spring 28 and or the air pressure on the butterfly valve 10 flapper as denoted by the arrows labeled flow in fig4 close butterfly valve 10 against stopping means 30 such stopping mean 30 acts as the butterfly valve shaft 40 bushing clevis locking link 24 as seen previously is utilized to keep push pull cable clevis 2 and lever 22 together until release of solenoid pin 42 whereby motion of the flapper of butterfly valve 10 commences in rotation as shown in the direction of the arrows of fig5 about shaft 40 of.