Mercury Arc Rectifiers for converting alternating to direct currents;
outfits supplied for A. C. circuits of 110-220 and 330 volts with D. C.
current capacities up to and including 50 Amps. (For Telephone Battery
Service this apparatus may include G. E. Type A Transformer of unit
ratio, to be inserted as insulation between A. C. circuit grounded
neutral and ground return of the telephone system.) Compensating
reactance case must be mounted on base of slate or over non-combustible
insulating material when installed on floor or wall of combustible
material. Approved April 13, 1908. Manufactured by
=General Electric Co., Schenectady, N. Y.=
M. S. Cord Grip. A fibre disc for use in socket and attachment plug caps,
rosettes and similar devices, replacing knot in flexible pendant cord.
Approved April 13, 1908. Manufactured by
=Marshall Electric Mfg. Co., 301 Congress St., Boston, Mass.=