. The street railway review . means of an arm passing througha narrow slot in the C3linder. The action is as follows: The faster the revolution ofthe crank shaft the greater is the pressure of air in theindicator cylinder and the higher will the piston rise, car-rying with it the pointers. As the pressure decreasesby a slower movement of the shaft the pointers fall, andthus, by means of a graduated scale, the speed of theshaft will be indicated by the pointers at anj given. moment. The downward movement of the piston andpointers is assisted by a light spring. The maximum indication is given b}
. The street railway review . means of an arm passing througha narrow slot in the C3linder. The action is as follows: The faster the revolution ofthe crank shaft the greater is the pressure of air in theindicator cylinder and the higher will the piston rise, car-rying with it the pointers. As the pressure decreasesby a slower movement of the shaft the pointers fall, andthus, by means of a graduated scale, the speed of theshaft will be indicated by the pointers at anj given. moment. The downward movement of the piston andpointers is assisted by a light spring. The maximum indication is given b} means of a sep-arate pair of pointers carried in guides in such a posi-tion as to be struck by the pointers before mentionedand raised, the backward movement being prevented bya spring pawl which engages with a ratchet. A contactstrip electricall}- connected with a battery or other sourceof electric power and having in the same circuit a bell is so arranged as to be adjustable, up or down, for an)-desired speed. The striking of tliis strip by the speedpointers closes the circuit and causes the bell to sound,and it continues to sound until the speed is so reducedas to lower the pointers and break the circuit. PULLMANS DOUBLE DECKER. C L. Iullman. of this city, has a new double deck carrunning—in his head and on paper—which he believes isgoing to revolutionize things, though he can hardlyhave forgotten the double-decked failure experienced bythe Pullman Company i
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
