Windshield wiper device for automobiles

Claim 1

A windshield wiper device for an automobile comprising wiper blade means adapted for wiping engagement with a windshield, blade driving motor means for driving the wiper blade means, control circuit means for controlling the blade driving motor means and including a wiper switch for producing a first signal, a time interval setting switch for producing a second signal, an up-down counter which is able to count in two different directions, said up-down counter starting a count in a first one of said two different directions from a reference value upon receipt of said first signal and for stopping the count upon receipt of the second signal, a memory responsive to the second signal for memorizing the counted value in the up-down counter when the second signal is produced, said up-down counter receiving the counted value memorized in the memory as a set input and repeatedly counting in a second one of said two different directions from the counted value toward the reference value to produce a pulse signal each time the reference value is reached, and energizing means for receiving the pulse signal directly from the up-down counter, and responsive thereto for energizing the blade drive motor means to drive the wiper blade means.