THE HEINRICHENBERG CANAL LOCK.
A novel and unusually powerful elevator for lifting canal boats and barges from one level to another is situated at Henrichenburg, on the Dortmund-Ems canal, in Germany. It is capable of lifting a canal boat of 800 tons burden a distance of about fifty-two feet in slightly over two minutes. The elevator itself, that is, the trough in which the boat floats, is about 229 feet long and twenty-eight feet wide. It is raised by a 150-horsepower electric motor, which rotates four vertical threaded shafts, one at each comer of the lift, and on each of which is a threaded traveling block supporting the trough. As these shafts are turned round by the motor, the four blocks are drawn up along their threads, and carry the elevator with them. Five floats in a tank beneath the lock on which the elevator rests balance the weight of the trough and the water it contains, amounting in all to some 6,000 or 7,000 tons, so that the energy expended in raising and lowering is little more than that required to overcome the friction. The lock gates are operated by electric motors. The electric generating plant is situated alongside of the lock on the canal bank.
The Neptune Meter company, as foreshadowed in the last number of FIRE AND WATER ENGINEERING, has received the order for 10,000 meters for the city of Cleveland, Ohio.