A pole and leash handling system for primates.

Zimmerman (1969) built a one-piece pole-and-leash tool for lab workers who move monkeys.

The leash slides inside the hollow pole so the animal can be held at arm’s length.

No nets, no gloves, no two-person chase—just one handler and one light rod.

The paper shows drawings and parts lists; it does not give trial data.

The claim: the rig lowers bites and scratches during routine restraint.

Rilling et al. (1969) shares the same spirit: cheap, shop-built gear that makes data collection safer. Their time-lapse camera keeps staff out of the classroom; the pole keeps staff away from monkey teeth.

Aviles‐Rosa et al. (2023) also custom-builds lab gear for animals—an olfactometer for search dogs. Both tools trim injury risk and standardize how behavior is tested, even though the species and decade differ.

Capio et al. (2013) looks at severe self-injury in humans with Prader-Willi. The pole tries to prevent injury before it starts; their survey maps injury after it happens. Same worry—tissue damage—different ends of the timeline.

If you run a primate lab, the plans let you mill a safer restraint tool for under ten dollars. Even if you work with humans, the idea carries over: build simple, durable apparatus that puts space between you and severe behavior. Think bite guards, arm-length cue sticks, or quick-release leashes—anything that keeps hands and faces out of the danger zone.