US2409255A - Weighting apparatus for textile drafting mechanisms - Google Patents

Description

50M E5, 1946. L. M. COTCHETT 2,409,255

WEIGHTING APPARATUS FOR TEXTILE DRAFTING MECHANISMS Filed Jan. 18, 1945 W i I Patented Oct. 15, 1946 WEIGHTINGAPPARATUS FOR TEXTILE DRAFTING MECHANISMS Louis M. Ootchett, Hingham, Mass, assignor to Saco-Lowell Shops, Boston, Mass, a corporation of Maine Application January 18, 1945, Serial No. 573,359

4 Claims. 1

This invention relates to weighting mechanisms for the top rolls of spinning and drawin frames. It aims to devise a mechanism of this character which. will be exceptionally simple in construction, reliable in operation, and which can be adjusted easily, quickly, and without disturbing the normal relationship of the parts.

The nature of the invention will be readily understood from the following description when read in connection with the accompanying drawing, and the nove1 features will be particularly pointed out in the appended claims.

In the drawing,

Fig. 1 is a view, partly in side elevation and partly in vertical section, illustrating a weighting mechanism embodying this invention; and

Fig. 2 is a plan view of the saddle shown in Fig. 1.

A known form of drafting mechanism is illustrated in the drawings, comprising top and bottom front rolls 2 and 3, respectively, similar rear rolls 4 and 5, an intermediate bottom roll 6 with which the top roll 4 can be adjusted into cooperating driving relationship, if desired, a slip roll I, an apron 8 driven by the lower rear roll 5, and a guide bar 9 over which the apron runs. Roll stands (not shown) support these rolls in their operative positions, and the stands themselves are mounted on a roller beam It.

All the foregoing, including also the saddle i2, are prior art devices and are here illustrated simply for the purposes of disclosure of the weighting mechanism provided by this invention.

The latter mechanism includes a stirrup rod l3 urged downwardly by a spiral compression spring M which encircles it, the upper end of this rod being screw-threaded into, and substantially through, a connector which extends freely through the slot E6 in the saddle and is hooked over the cross pin I! in said slot. The spring is enclosed loosely in a tube It, and bears at its lower end against a washer 20 which is backed up by the headed-over lower end 2! of the rod l3, and its upper end abuts against another washer 22 which acts as a stop and is held in place by the crimped-over end portion '23 of the tube. As shown, the tube is .pivoted at 24 to a stud 25 pr0- jecting upwardly from a foot piece 26 bolted to the roller beam l0, so that the tube and the stirrup can swing freely backward and forward in connection with the release of the saddle from the weighting machine, or re-hooking the connecting member again to it.

It will be evident from an inspection of Fig. 1 that with this arrangement the stirrup is con- 2 stantly urged downwardly and rearwardly by the spring l4, and that this pressure is transmitted through the connector [5 and saddle [2 to the front and rear top rolls 2 and 4. Also, that the degree of pressure so applied to the saddle can be adjusted merely by inserting a screw-driver in the upper end of the stirrup rod l3 and revolving the latter around its own axis. Such rotation raises or lowers the lower end of the rod and therefore changes the degree of compression of the spring. Access to the slotted upper end of the rod is for this purpose is afforded through the aperture it, as will be evident from an inspection of Fig. 2.

For convenience in lifting the part l5 to release the saddle, or to connect the latter again with the weighting mechanism, the upper end [5' of this member is thickened so as to provide a somewhat elongated knob that may be easily grasped between the thumb and fore-linger. In other words, this portion of the connector above the level of the end of the rod is made somewhat T-shaped, having a thin neck where it passes through the aperture [6 and a, relatively large laterally thickened head.

Preferably a cover piece 2'! is adjustably secured to the stirrup rod It by a set screw 28 and is provided with a sleeve which telescopes over the upper end of the tube 28 and prevents the entrance of lint and fly into the tube.

It should be observed that the adjustment of the pressure applied to the saddle and thence to the top rolls, as above described, can be made while all the parts remain in their normal operative positions. Also, by making graduations on the outer surface of the tube I8 where they will cooperate with the lower edge of the member 21 to indicate variations in the degree to which the spring i4 is extended by the difierent adjustments of the rod, a measure of the pressure applied to the saddle is afforded.

The invention thus provides a weighting mechanism of exceptionally simple but sturdy construction, not liable to get out of order, easy to operate, and very convenient to adjust.

Having thus described my invention, what I desire to claim as new is:

l. A weighting apparatus for one or more of the top rolls of a textile drawing mechanism, comprising a saddle having a vertical slot therein, a pin extending transversely across said slot, a spring loaded stirrup rod, and a connector releasably hooked over said pin, said rod being screwthreaded into said connector with its upper end slotted to take a screw-driver, and said end being accessible through said slot, the rotation of said rod serving to adjust the pressure applied to said saddle.

2. A weighting apparatus for one or more of the top rolls of a textile drawing mechanism, comprising a saddle, a pressure-applying member bearing on said saddle, releasably connected thereto and held against rotation relatively to the saddle, a stirrup rod screw-threaded into said member, and a spring exerting a downward pull on said rod, said rod being rotatably connected with said spring so that rotation of said rod around its own axis adjusts the degree of said pull.

3. A weighting apparatus for one or more of the top rolls of a textile drawing mechanism, comprising a saddle, a stirrup rod, a spring connected with said rod to exert a downward pull on it,'and a device having a hook connection with said saddle and a screw-threaded connection with said rod such that rotation of said rod around its own axis adjusts the weighting effort exerted by said spring on, said saddle, the upper part of said rod being accessible for application thereto of a tool for rotating said rod to produce such adjustment.

4. A weighting apparatus for one or more of the top rolls of a textile drawing mechanism, comprising a saddle, a connector bearing on and releasably engaging said saddle, a stirrup rod, the upper part of which has a screw-threaded connection with said connector, a spring encircling a part of. saidrrodand connected with its lower end to apply a downward pull thereto, a tube enclosing said spring and pivotally anchored to a part of the machine frame, a stop at the upper end of said tube against which the upper end of said spring abuts, and a sleeve telescoped over the upper end of said tube, a part of said rod above said tube being accessible so that the rod can be rctated around its own axis to adjust the weighting efiect exerted by said spring on said saddle.

LOUIS M. COTCHETT.

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