▁bur nd y ▁cl amps ▁and ▁other ▁elect rical ▁equipment . ▁ ▁The ▁elect r ification ▁of ▁the ▁New ▁South ▁Wales , ▁South ▁Coast ▁from ▁Sydney ▁to ▁the ▁town ▁of ▁E den ▁was ▁begun ▁before ▁World ▁War ▁II ▁and ▁continued ▁through ▁the ▁war . ▁It ▁was ▁the ▁company ' s ▁largest ▁project . ▁ ▁The ▁growing ▁company ▁took ▁on ▁Jack ▁Se ab orn ▁Wil co x ▁( 1 9 1 1 – 1 9 5 6 ) ▁as ▁a ▁partner ▁in ▁ 1 9 3 7 , ▁and ▁later , ▁Sir ▁Gregory ▁Bla x land ▁K ater ▁( 1 9 1 2 – 1 9 7 8 ). ▁ ▁In ▁ 1 9 4 0 ▁the ▁company ▁bought ▁into ▁the ▁Electric ▁C lock s ▁and ▁Inst ru ments ▁P ty ▁Ltd ▁and ▁Cro ok ▁became ▁a ▁Director ▁and ▁w ound ▁up ▁the ▁company ▁absor bing ▁their ▁equipment ▁and ▁customers ▁into ▁his ▁company . ▁ ▁Cro ok ▁res igned ▁from ▁Alan ▁Cro ok ▁Elect rical ▁in ▁April ▁ 1 9 4 7 . ▁ ▁He ▁was ▁supp l anted ▁while ▁in ▁the ▁United ▁States ▁on ▁a ▁study ▁tour ▁of ▁modern ▁manufact uring ▁methods . ▁He ▁then ▁started ▁business ▁as ▁an ▁elect rical ▁and ▁mechanical ▁engineering ▁consult ant . ▁ ▁Cro ok ▁also ▁became ▁more ▁active ▁in ▁the ▁Institution ▁of ▁Engine ers ▁and ▁other ▁industry ▁bodies . ▁ ▁In ▁the ▁Institution ▁of ▁Engine ers ▁he ▁was : ▁ ▁Chair man ▁of ▁the ▁elect rical ▁branch ▁of ▁the ▁Sydney ▁division , ▁ ▁a ▁member ▁of ▁the