Mortar Projector

Author:  Hansen, C. C.
Source:  US Patent 1,566,325
Doc ID:  1925000
Year of Publication:  1925
Abstract:  
This invention relates to mortar projecting devices and more particularly that type of device which utilizes for its motive force a fluid, such as compressed air. One object of the invention is to project the mortar with as little waste mortar as possible and with efficient and economical air consumption.