You have feed dogs on a sewing machine, and chain dogs on a roller coaster's lift hill, why are they called this if they look nothing like actual dogs? - Quora
![Dom 🏴 on Twitter: "Anti rollback dogs - these engage with metal teeth on the lift hill that prevents the train from rolling back down the lift hill if the motor driving Dom 🏴 on Twitter: "Anti rollback dogs - these engage with metal teeth on the lift hill that prevents the train from rolling back down the lift hill if the motor driving](https://pbs.twimg.com/media/ETQJ2l2XsAA7f1S.jpg)
Dom 🏴 on Twitter: "Anti rollback dogs - these engage with metal teeth on the lift hill that prevents the train from rolling back down the lift hill if the motor driving
![Traveling kiddie carnival ride roller coaster heavy traction chain dog under construction in a shopping mall parking lot in Niles, Illinois, USA on a sunny summer morning Stock Photo - Alamy Traveling kiddie carnival ride roller coaster heavy traction chain dog under construction in a shopping mall parking lot in Niles, Illinois, USA on a sunny summer morning Stock Photo - Alamy](https://c8.alamy.com/comp/PGGWAT/traveling-kiddie-carnival-ride-roller-coaster-heavy-traction-chain-dog-under-construction-in-a-shopping-mall-parking-lot-in-niles-illinois-usa-on-a-sunny-summer-morning-PGGWAT.jpg)