Electrical news and engineering . also series 2 No. 4 of Con-dulot Talk. Northern Electric Publications.—No. NlOOl, Switchboards, with self-restored linesignals . No. N1003, Magneto convertible, Non-multiple Switchboards with self-restored line N1004, Central Battery, Non-multiple Switchboardswith lamp signals. No. N1007, .\ccessories and protectorequipment for non-multiple switchboards. No. NlOOS, Tele-phone Power Plant Equipments for non-iuultiple switch-boards. No. N11I6, Magneto, Telephone Sets and Accessor-ies. No. Nni7, Common Battery Telephone Sets, and
Electrical news and engineering . also series 2 No. 4 of Con-dulot Talk. Northern Electric Publications.—No. NlOOl, Switchboards, with self-restored linesignals . No. N1003, Magneto convertible, Non-multiple Switchboards with self-restored line N1004, Central Battery, Non-multiple Switchboardswith lamp signals. No. N1007, .\ccessories and protectorequipment for non-multiple switchboards. No. NlOOS, Tele-phone Power Plant Equipments for non-iuultiple switch-boards. No. N11I6, Magneto, Telephone Sets and Accessor-ies. No. Nni7, Common Battery Telephone Sets, and .\c-cessories. Manufacturing Electric Hammers The Benjamin Electric Manufacturing Company liastaken over the agency of tlic Electro-Magneto Tool Com-pany, Chicago, 111., and are manufacturing their well-knownhammers in Toronto. These electric hammers offer thesame possibilities of labor economy over hand work as airand steam hammers of corresponding capacities, showing apower economy of from 70 lo !»0 per cent. Tlie cut shows. the Model No. 4 hammer, which weighs 35 lbs and is In the construction of this hammer the height ofsimplicity has been obtained. A series motor furnishes thepower. On the shaft of the motor is a small spur gearwhich meshes with a larger gear carried upon a jack-shaftextending through the motor frame. From a crank pin onthe larger gear a connecting rod links the motor to thesleeve. Within the sleeve lies the hammer element, a pieceof hardened tool steel. The connection between the ham-mer and the sleeve is magnetic, being furnished by a solen-oid which lies around the sleeve and provides a magnet in these tools has nothing to do with the de-livery of the blow, acting merely as a flexible clutch to pre-vent the strain and jar of delivery from being felt uponthe gears and motor. The current in the magnet coil isalways in the same direction and remains unbroken whilethe tool is in operation. The tool delivers 1,800 blows perminute,
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen20donm
