Where It Can Be Profitably Applied

On any machine or mechanical appliance whatever requiring variable speed. We mention below a few applications where they have been used to advantage.

In making inquiry of us as to the size of Transmission required for driving any machine, the following data should be given us:

1. Kind of machine to be driven.
2. Diameter of drive pulley on ma-
chine.

3. Width of belt used on this pulley.
4. Whether double or single belt is
used.

5. Highest speed it is desired to run this pulley.

6. Lowest speed it is desired to run this pulley.

7.

Speed of line shaft from which
Transmission will be driven.

8. Whether Transmission is to be
used on floor or ceiling.

9. Length shafts are to be extended outside boxing.

Explanation of Table

SPEED VARIATION-Ratios under Class headings give extreme increase and extreme decrease of speeds relative to speed of Constant or Driving Shaft. MAX. SPEED CON. SHAFT-is greatest speed of Driving Shaft for which machinery is built to run.

MAX. and MIN. H. P.-are respectively the H. P. at highest and lowest speed of Variable Shaft with Driving Shaft at Max. speed-less H. P. however being proportionate to decrease in speed of Driving Shaft.

MAX. PULLEY ON VARIABLE SHAFT is largest pulley required to transmit Max. H. P. of Variable Shaft.

Full information and price of parts furnished upon application.

Rope Driving

Transmitting power by Manila Rope has only in the last few years become recognized by power users as a system far superior to all others. Heretofore mill and factory owners have resorted to the use of rope drives under conditions where belts could not be used, and recognizing their great saving features, have installed them throughout their plants.

There are two systems of rope driving in general use-the American or Continuous System, and the English or Multiple System. The former system is a great improvement over the latter, and is more commonly used at the present time. It consists of one rope wound in grooves as many times as is necessary to transmit the required power, only one splice being necessary. An automatic tension carriage is provided to regulate the strain on the rope. The English System consists of a separate rope in each groove, which means a separate splice for each loop of rope. Larger ropes must necessarily be used to give sufficient weight for tension, as tension carriages are not used in this system.

The first cost of installation as well as maintenance of rope drives is less when compared with other means of transmitting power.

With the use of rope drives power may be transmitted in most any direction and will occupy less space than with belts. They are smooth running and noiseless.

No doubt a great many more rope drives would be installed were it not for the fact that some manufacturers, who have had but little experience in rope driving, design and sell drives that never work satisfactorily. The power user who is unfortunate enough to install a drive of this kind naturally becomes dissatisfied, and either takes out the drive or keeps it up at considerable expense. Rope drives must be properly designed to give satisfaction.

By the use of the automatic tension outfit, English System drives can be changed over to the American System.