Research Type
CuratorPerson
Shaun SliferDate
Nov 18, 2020Notes
A mining or caving lamp has calcium carbide placed in a lower chamber, the generator. The upper reservoir is then filled with water. A threaded valve or other mechanism is used to control the rate at which the water is allowed to drip into the chamber containing the calcium carbide. By controlling the rate of water flow, the production of acetylene gas is controlled. This, in turn, controls the flow rate of the gas and the size of the flame at the burner, and thus the amount of light it produces.Research Type
InternetPerson
Shaun SliferDate
Feb 16, 2022Notes
"The Butterfly (A.K.A. Safesport) has been called a Hong Kong knockoff of the Guy's Dropper. The outward designs are very similar, however there is a world of difference in their operation. Where the Dropper has a good reputation of being a trustworthy lamp, the Butterfly does not. Though the Butterfly was fairly inexpensive, it was never a dependable lamp. Leaks abounded, gas tubes fractured or pulled free, and various problems arose. A Butterfly is easily identified by a butterfly stamped on to the water door. Regard this stamp as a mark of impending darkness."
- National Speleological Society, "Buying a Carbide"
(https://caves.org/member/mfraley/buying2.htm)