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1886 At Tangyes he improved Robson's patent gas hammer in which the mixture of air and gas is introduced above the piston, where it is compressed and ignited. The explosion then gives the blow, after which the hammer is raised to its former position by means of a spring. It is simple, and the force of the blow can be regulated with the greatest accuracy. By 1887 one of these hammers has been working regularly for twelve months, and had proved itself to be equal in efficiency to the steam hammer, and much cheaper in point of economy. 
Also devised the "Soho Gas Engine (Pinkney's Patent)"