Reverse locking spring

Claim 1

THE COMBINATION WITH A PROPULSION UNIT, OF A FIRST BRACKET MEMBER ADAPTED TO BE CONNECTED TO A BOAT, A SECOND BRACKET MEMBER CONNECTED TO AND MOVABLE WITH SAID PROPULSION UNIT, MEANS CONNECTING SAID FIRST AND SECOND BRACKET MEMBERS FOR PIVOTAL MOVEMENT THEREBETWEEN ABOUT A GENERALLY HORIZONTAL AXIS, SAID PROPULSION UNIT NORMALLY ASSUMING A GENERALLY VERTICAL OPERATING POSITION AND BEING MOVABLE ABOUT SAID AXIS IN A VERTICAL PLANE IN RESPONSE TO REARWARD AND UPWARD TILTING FORCES, A LOCK PIN ON ONE AND AN ANCHOR PIN ON THE OTHER OF SAID FIRST AND SECOND BRACKET MEMBERS, AND A RESILIENT REVERSE LOCKING SPRING HAVING ONE END PIVOTALLY MOUNTED ON ONE OF SAID PINS AND THE OTHER END THEREOF TERMINATING IN A BENT END PORTION ADAPTED TO RELEASABLY ENGAGE THE OTHER OF SAID PINS TO OPPOSE REARWARD TILTING OF SAID PROPULSION UNIT, SAID SPRING INCLUDING A PORTION INTERMEDIATE THE ENDS THEREOF WHICH IS BOWED OUTWARDLY FROM A LINE BETWEEN SAID ENDS SO THAT WHEN SAID BENT END PORTION IS ENGAGED BY SAID OTHER PIN UPON REARWARD TILTING SAID BOWED PORTION EXERTS A FORCE IN OPPOSITION TO A NORMAL REARWARD TILTING FORCE TO MAINTAIN SAID BENT END PORTION IN ENGAGEMENT WITH SAID OTHER PIN, SAID BOWED PORTION BEING STRAIGHTENED IN RESPONSE TO ABOVE NORMAL REARWARD TILTING FORCE TO SWING SAID BENT END PORTION RELATIVE TO SAID OTHER PIN TO PERMIT DISENGAGEMENT THEREBETWEEN AND RELEASE SAID PROPULSION UNIT.