spring-gun
spring-gun is a mine or weapon type.
Overview
A gun rigged to fire when a tripwire or other triggering device is activated by a person stumbling over or treading on it.
In detail
spring-gun is a mine or weapon type.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Spring-gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q896585: spring-gun
Consult the source