Abstract: An electromechanical interlock device is interposed between an electrical credit system and a mechanical product dispenser. In preferred form, the interlock device includes a solenoid electrically connected to the credit system, and a drive cam adapted to be positively rotated by the manually operated mechanical product dispenser. The interlock device also includes a locking arm spring loaded into locking engagement with the drive cam to prevent unauthorized rotation thereof, an activator arm connected to the solenoid and adapted to remove the locking arm from locking engagement with the drive cam, and a latch lever. The solenoid is electrically energized upon deposit of the coinage required to achieve vending of a product, the solenoid driving the activator arm and, hence, the locking arm, into the unlock position, thereby withdrawing the locking arm from interlock engagement with the drive cam.