US15245A - Netting-machine - Google Patents

Description

nEiTEn sTATEs PATENT oEEicE.

JOI-IN MCMULLEN, OF BALTIMORE, MARYLAND.

NETTING-IVIACHINE.

Specication of Letters Patent No. 15,245, dated July 1, 1856.

To all whom t may concern.'

Be it known that I, JOHN MCMULLEN, of the city of Baltimore and State of Maryland, have invented a new and useful Improvement on John McMullens Netting-Machine, patented June 27, 1846; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, forming part of this specification, in which- Figure l is a plan and Fig. 2 a vertical section on line :c fr.

Similar letters of reference in the several figures denote the same part.

My invention, which is an improvement On the netting machine patented by me on the 27th day of June, 1846, is designed to effect the tightening of the knots, continuously and regularly, as the net is delivered from the aforesaid machine; making this tightening action simultaneous with the netting operation; and not interfering with the requisite slack of material for the formation of the knots by the machine.

The knots formed by my machine pass from it in a loose state, the welt which forms the half hitch, being in a transverse position, and causing the meshes to have an oblong shape,. smallest in direction of the length of the net. Stretching lengthwise will double in this welt to form its portion of the knot, and thus square the mesh. Yet, to prevent too much of the weft being taken up in tightening the knots, it is necessary to effect a certain portion of this tightening by a lateral strain on the knots.y TheseV being the conditions under which the tightening apparatus must act, I will here state my invention as follows.

The nature of my invention consists in conveying the net as it comes from the machine, between and partially around two pressure rollers, Yand in effecting th-e tightening between those rollers and the cloth beam; the distance between said beam and the rollers, being such that longitudinal strain given the net,will, with the lateral resistance of the rollers, produce a square mesh and knots of the requisite tightness.

The invention further consists in so connecting a lever bar (under which the net passes, on leaving the machine) with the pawl driving the cloth beam, that the tightening of the net, between the machine and the lever bar, beyond the slackness requisite for the formation of the knots, will stop the rotation of the clot-h beam.

In the drawing R R are the'pressure rollers, and B the cloth beam. R is a roller under which the net passes before reaching the cloth beam. These several parts are contained in a suitable frame F.

Motion is comunicated to the cloth beam B, by the turning of ratchet r by pawl p. This pawl is moved by the lever Z, with which it is jointed, by reason of stud s and slot s. The pawl p is connected by rod a with the rock shaft Z), the other arm c of which is att-ached to the lever bar cl; so that the lifting of lower edge of said lever bar, will raise the pawl p from ratchet r. This connection of the lever bar with the pawl, is extremely sensitive, so that the slightest pressure against the lower edge of said bar, will lift the pawl and stop the rotation of the cloth beam. The movement of ratchet r is communicated to the cloth beam through pinion e and cog wheel g; t-he dimensions of which regulate the velocity of winding the net on the beam to the speed of delivery from the machine. Pawls 7L L hold wheel g and preventslipping. This stretching appara-tus is for convenience placed behind the netting machine the net passing, from where the knots are formed, under the machine to this stretcher. It may however be placed in front of the machine. Motion is communicated to the stretcher by a band over pulley P, and the net passed under the vlever bar and between the pressure rollers as shown in the drawing. The pressure of the rollers is governed by lever Z.

The net is stretched and the knots tightened bet-Ween the pressure rollers and the cloth beam, as above set forth. Vhen from any cause the portion of the net between the machine and lever bar, drawsvupon the said guard bar, with a tendency to decrease the requisite slack for forming the knots, the lever bar through the rock shaft connection above described, suspends the rotation of the cloth beam, until the requisite slack is again obtained.

What I claim as my invention is- In testimony whereof, I have hereunto Finishing the meshes of the net and tightensigned my name before two subscribing Witing the knots by the simultaneous longtunesses. y

dinal and lateral strain of pressure rollers JOHN MCMULLEN.

5 and Cloth beam operating substantially as Witnesses:

speeied; the relative position of said rollers WM. I-I. BAYJAND, and beam being automatically preserved. L. M. REYNOLDS.

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