Dr and Mrs Harold Throg with Dr Throg’s newly invented “Steam Pushmi-Pullyu”, 1897; a moderately spectacular failure. Having solved the problem of combining the double-acting wishbone with the rotary gaffle valve, Dr Throg then found that his machine could not, in fact, do any useful work. Some suggestion was made that the machine should be elected to Parliament, but in the end wiser counsels prevailed.
The machine was placed in retirement, and reluctantly offered for sale some time later. In 1900 the Board of the Kaiser’s Heisswasserkriegsmaschinenwerk decided to purchase the Pushmi-Pullyu as part of a weapons development program. This decision is believed to have delayed the rise of German military engineering by approximately five years.