Brown's Valve Gear.

Progress, Volume I, Issue 6, 2 April 1906, Page 134

Brown's Valve Gear.

Mr B H Brown, of New Plymouth, is the inventor of the reversing gear for steam engines illustrated below It will be seen that the valve rod, i, has a slotted bracket, 2, withm which a crank pin, 3, of a shaft, 4, and its brasses, 5 , are fitted. The crank pm carries upon its free end a block, and to the middle part of the crank shaft, 4. a toothed reversing wheel, 6, is fixed. The block upon the end of the crank pm passes into a slot provided by a clamp upon a second or driving crank shaft which is

revolved by the connecting rods fixed to the rocking lever shown in the elevation. A reversing lever is fixed upon a shaft, 10, upon which an arm or sector, ii is fixed, having a rack, 12, adapted to gear with the toothed reversing wheel, 6. To reverse the engine the crank pin and reversing wheel are revolved by the rack, 12, being brought to engage with reversing wheel, 6, which is operated by a lever upon shaft, 10, thereby reciprocating the valve rod, in the bracket of which the crank pin slides.