Spot sprayer for tall weeds

Claim 1

A self contained spot sprayer for tall weeds in short crops, comprising: a) a housing affixed to a mechanized sprayer; b) a tank containing a liquid herbicide therein carried on said housing; c) a pump connected to said tank; d) a discharge tube extending from said pump; e) a spray nozzle at the distal end of said discharge tube; and f) a means, carried on said housing, for sensing the tall weeds in the short crops, so as to allow said pump to transfer a predetermined amount of the liquid herbicide form said tank through said discharge tube and exit said spray nozzle to spray the tall weeds and kill them, said sensing means including a solenoid in said discharge tube and carried on said housing and a first sensor carried on said housing and proximate to said spray nozzle and a second sensor carried on said housing and spaced away from said first sensor and a battery electrically connected between said solenoid, said first sensor and said second sensor so that when the mechanized spray rig moves along and above the ground said first sensor will make contact with a tall weed and activate said solenoid to allow the liquid herbicide to pass through said discharge tube and exit said spray nozzle, said second sensor will make contact with the tall weed and deactivate said solenoid to stop the liquid herbicide from passing through said discharge tube, said first sensor and said second sensor each including a microswitch having an actuating arm, whereby said microswitch is electrically connected between said solenoid and said battery and an activating lever on a bearing extending outwardly therefrom proximate the actuating arm to make contact with the tall weed, so as to press in the actuating arm and operate said microswitch.