Ifttp.l 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



49 



the crank and the boss of the wheel for the reception of the ec- 

 centrics upon the axle. 



The sixth improvement is for transmitting the power from 

 the steam cylinders to the driving-wlieels, by introducing a vibra- 

 tory shaft in the centre between the driving-wheels, as shown in 

 the annexed figure. The steam cylinders a are fixed to the under- 



side of the boiler, with short connecting-rods 6, which act on 

 cranks or levers keyed on to the central shaft c ; and on the ends 

 of the latter are two arms or levers d d, which, through the two 

 connecting-rods ee, cause the two driving-wheels// to revolve. 



LIGHTING BY ELECTRICITY. 



William Edwards Staite, of Lombard-street, gentleman, for 

 " certain Improxtements in lighting, and in the apparatus or appara- 

 tuses connected therewith." — Granted July 3, 18+7 ; Enrolled Janu- 

 ary 3, 184.8. [^Reported in the Mechanics' Magazine.~\ 



This invention relates to a method of lighting by electricity, as 

 shown in the annexed engravings. Fig. 1, an external elevation of 



Fig. 2 



the apparatus ; fig. 2, a sectional elevation on the line Wx (fig. 3) ; 

 and fig. 3, a horizontal plan on the line y z (fig. 1). The patentee 

 describes his apparatus as follows : — 



M, and N, are two cylinders of carbon, prepared as is afterwards 

 described, which are used as the electrodes, that is to say, the cur- 

 rent of electricity is passed from one to the other as tliey stand 

 end to end, tlieir ends being separated by an interval of from less 

 than one-twentieth to about half an inch, according to tlie power 

 of the electric current used. The upper electrode, N, is passed 

 vertically through a hole in the summit of the metallic support, or 

 tripod, K, and fixed by binding screws. The lower ends of the 

 legs of the tripod are passed through holes in the circular main- 

 plate, A, of the apparatus, and secured in their positions by collars 

 and nuts, but are carefully prevented from coming into metallic 

 contact with the plate A, by means of washers a a, of some dry, 

 hard, non-conducting wood. The legs terminate at bottom in set 

 screws L L, which connect them with a conducting wire, which 

 passes round tlirough tlie extremities of all the legs, and is con- 

 nected with one end of the coil of the regulator R. The other end 

 of this coil is led to a clamp B-, with a set screw fixed at one side 

 of the square wooden basement B, on which the whole of the appa- 

 ratus is built, and which is mounted on four short supports, bbb b, 

 at its corners, to allow room for some parts of the appaiatus which 

 project below tlie basement. The main-plate A is firmly attached 

 to the basement B, by four pillars, cccc. C, and D, are cones 

 which spring from opposite sides of the apparatus, their common 

 axis passing at right angles through the centre of the main-plate, 

 A which is bored out for the purpose. The apices of these cones 

 are perforated, to admit the perpendicular central shaft, O, which 



Fig. 1. 



