spring 129 and then ultimately allow the pin to fall into notch 150 to latch arm 145 in its fig3 position the side walls 146 of arm 145 are joined together by a transverse wall 149 of arm 145 and two transverse elements 249 and 349 all stamped integrally from the same sheet material of which side walls 146 are formed and extending therebetween elements 249 and 349 may serve as indicators having words printed thereon which are visible through a transparent sealed window 192 fig1 to indicate to an operator whether valve 95 is open or closed arm 145 may be yieldingly urged in a clockwise direction from its fig3 position to its fig3 a position by spring means typically taking the form of a coil spring 152 disposed about shaft 134 and having a first end 153 bearing against one of the bracket arms 137 projecting downwardly from plate 101 and a second end 154 fig4 bearing downwardly against the upper wall 149 of arm 145 a pin 155 is attached to arm 145 in fixed relative position as by reception within aligned notches 255 in side walls 146 and retention in those notches by a portion 249 of top wall 149 pin 155 extends along an axis 156 which is parallel to axis 135 and to the various pivot pins 119 121 124 and 125 of the inertia actuated control mechanism 103 arm 145 is adapted to be manually actuated from its fig3 a released position to its fig3 latched position by manual rotation of shaft 134 which.