Excerpt from US patent 745,264 by Albert V. Todd, filed on May 29, 1903; depicting a lockable belt with a tube for inserting the penis. It uses spikes, electric shocks and an alarm bell as punishment for erections (designed to prevent masturbation and nocturnal ejaculation)
This image (or other media file) is in the public domain because its copyright has expired.
This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.