Time recording system esp. for pigeons - has paper roll on which automatic time printings are recorded

摘要

The time registration system, especially for pigeon arrival timing, has a strip of paper of specific weight 45 g/m2 clamped to a rotating plastic carrier. The paper is coiled round a drum and attached on one side to an adhesive plastic base. One end of the coil passes to a roller for winding at a steady rate and passes an adjustable hammer which prints the time on the paper in digital characters when actuated by the pigeon clock.