Illustrated Catalogue of Cotton Machinery Part 14

The following table may be used in calculating the required Laps per Inch on Bobbin for any given hank roving:

{129}

1 hank or below, 7.5 x square root of hank = Laps per Inch

1 hank to 2 hanks, 8.5 x square root of hank = Laps per Inch

2 hanks to 3 hanks, 9.5 x square root of hank = Laps per Inch

3 hanks to 4 hanks, 10.0 x square root of hank = Laps per Inch

4 hanks and above, 10.5 x square root of hank = Laps per Inch

Good results are obtained by using 9.3 x square root of hank.

TAPER AND TENSION CALCULATIONS.

It is difficult to give hard and fast rules for figuring the Taper and Tension Gears, as the required number of teeth on these gears is affected by the kind of stock, length of staple, amount of twist, temperature and humidity.

PRODUCTION CALCULATIONS.

[Ill.u.s.tration]

{130}

SLUBBING, INTERMEDIATE, ROVING AND JACK FRAMES.

DRAFT TABLES.

[Ill.u.s.tration]

NOTE-The above is for front and back rolls the same dia.

{131}

SLUBBING, INTERMEDIATE, ROVING AND JACK FRAMES.

KEY TO TWIST TABLES.

(See pages 132 and 133 for complete Twist Tables.)

[Ill.u.s.tration]

Combinations Nos. 1, 2, 3 and 4 are for Slubbing and Intermediate Frames with 1-1/4-inch dia. Front Roll.

Combinations Nos. 5, 6, 7, 8 and 9 are for Roving and Jack Frames with 1-1/4-inch dia. Front Roll.

Combinations Nos. 10, 11, 12, 13 and 14 are for Roving and Jack Frames with 1-1/8-inch dia. Front Roll.

{132}

SLUBBING, INTERMEDIATE, ROVING AND JACK FRAMES--TWIST TABLES.

(See page 131 for key to these tables.)

[Ill.u.s.tration]

{133}

SLUBBING, INTERMEDIATE, ROVING AND JACK FRAMES-TWIST TABLES.

(See page 131 for key to these tables.)

[Ill.u.s.tration]

{134}

SLUBBING, INTERMEDIATE, ROVING AND JACK FRAMES.

LAY GEARING AND CONSTANTS.

[Ill.u.s.tration]

There are two change gears in the lay combination, the Reversing Shaft Change Gear Z2 and the Lay Change Gear W1. Although we have given the full list of Lay Gearing in the above table, only the gears marked *

are variable, the others being the same for all frames. The regular change gear is W1 and the table on the next page gives lay constants for a range of Reversing Shaft Change Gears Z2 from 14 to 22 inclusive. To find the correct lay constant select the proper {135} Lay Gearing Combination from the nine given above, note the number of teeth on the Reversing Shaft Change Gear Z2 and take the constant which corresponds in the table below. For example, the lay constant for a frame with gearing like No.4 combination and a 16 T. Reversing Shaft Change Gear is 437.9. This divided by the number of teeth on the Lay Change Gear W1 will give the laps per inch on the bobbin.

TABLE OF LAY CONSTANTS FOR GEARING COMBINATIONS No.1, No.9 AND REVERSING SHAFT CHANGE GEARS 14 TO 22 T.

[Ill.u.s.tration]

{136}

ROVING TABLE.

FOR NUMBERING BY THE WEIGHT, IN GRAINS, OF 12 YARDS; AND SHOWING TWIST PER INCH.

(Square Root X 1. 20)

[Ill.u.s.tration]

{137}

ROVING TABLE--CONTINUED.

FOR NUMBERING BY THE WEIGHT, IN GRAINS, OF 12 YARDS; AND SHOWING TWIST PER INCH

(Square Root X 1.20)

[Ill.u.s.tration]

{138}