ring ▁was ▁developed ▁in ▁the ▁ 1 9 3 0 s ▁but ▁not ▁used ▁in ▁mechanical ▁se als ▁until ▁after ▁World ▁War ▁II . ▁ ▁In ▁the ▁late ▁ 1 9 3 0 s , ▁probably ▁about ▁ 1 9 3 8 ▁or ▁ 1 9 3 9 , ▁mechanical ▁se als ▁began ▁to ▁replace ▁pack ing ▁on ▁autom obile ▁water ▁p umps . ▁ ▁The ▁famous ▁Je ep ▁of ▁W W II ▁used ▁a ▁rub ber ▁bell ows ▁se al ▁in ▁the ▁water ▁p ump . ▁ ▁After ▁W W II , ▁all ▁autom obile ▁water ▁p umps ▁used ▁mechanical ▁se als . <0x09> ▁ ▁In ▁the ▁mid - 1 9 4 0 s ▁p ump ▁manufact ur ers ▁such ▁as ▁In gers oll - R and , ▁Wor thing ton , ▁Pacific , ▁By ron ▁Jackson , ▁United , ▁Union ▁and ▁others ▁began ▁to ▁make ▁their ▁own ▁mechanical ▁se als . ▁ ▁Event ually ▁most ▁of ▁these ▁companies ▁got ▁out ▁of ▁the ▁se al ▁business ▁but ▁the ▁By ron ▁Jackson ▁se al ▁became ▁the ▁Borg - W ar ner ▁se al ▁( now ▁Flow serve ) ▁and ▁the ▁Wor thing ton ▁se al ▁was ▁sold ▁to ▁Chem pro ▁( now ▁John ▁C rane ▁- ▁Se al ol ). ▁ ▁Cart ridge ▁se als ▁were ▁used ▁on ▁a ▁regular ▁basis ▁by ▁ 1 9 5 0 ; ▁this ▁convenient ▁pack aging ▁of ▁se al , ▁sle e ve ▁and ▁g land ▁was ▁probably ▁developed ▁by ▁C . ▁E . ▁Wi ess ner