afterwards adding 1-1/2 per cent. for shrinkage of the cloth after being released from the tension of the loom.
Thus, Dickinson’s gear is—
(50 × 75 × 100) / (12 × 60) = 520.
Add 1-1/2 per cent. = 7.8
——
Dividend 527.8
The principal gears in use in Lancashire are:—
| Rack Wheel. | Stud and Carrier Wheel. | Pinion. | Beam Wheel. | Circumf. Take-up Roller. | Dividend. | |
| J. Harrison & Sons, now J. Dugdale & Sons | 50 | 100 | 12 | 75 | 15 | 528 |
| H. Livesey & Co.} Willan & Mills} J. Dugdale & Sons} J. & R. Shorrock} | 50 | 120 | 15 | 75 | 15 | 507 |
| Butterworth & Dickinson | 50 | 100 | 12 | 75 | 15 | 528 |
| W. Dickinson & Sons | 50 | 120 | 15 | 75 | 15 | 507 |
| Geo. Keighley | 50 | 140 | 15 | 78 | 14-1/2 | 637 |
| Pickles | 24 | 89 | 15 | 90 | 15 | — |
Pickles’ gear also has a swing pinion 24, and 2 change wheels; to find the change wheel required, multiply the change wheel on the rack stud by the picks per quarter inch, and divide by 9—
Equal to 4 teeth per pick for a 36 change wheel.
Equal to 3 teeth per pick for a 27 change wheel.
Equal to 2 teeth per pick for a 18 change wheel.
By using this motion, which is shown on [Fig. 23], both heavy and light pick cloth can be woven without a great variation in the wheels.
To weave heavy pick cloth with, say, the first-named motion, the rack wheel might be increased to 60 from 50, and the dividend would then be 634.