US494673A

US494673A - Alonzo falls

Info

Publication number: US494673A
Authority: US
Publication date: 1893-04-04
Anticipated expiration: 1910-04-04

Description

(N0 M0461. 2 Sheets-Sheet 1.

FALLS. STOP MOTION DEVICE FOR DRAWING FRAMES.

No. 494,673. Patented Apr. 4, 1893.

Fig.1.

2 Sheets-Sheet 2.

(No Model.)

A.FALLS. h STOP MOTION DEVICE FOR DRAWING FRAMES. No. 494,673.

Patented Apr. 4., 1893'.

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1 arms PETERS c0, mum-Lima. WASH NITED STATES PATENT OFFICE ALONZO FALLS, OF LOWELL, MASSACHUSETTS, ASSIGNOR TO THE LOWELL MACHINE SHOP, OF SAME PLACE.

STOP-MOTION DEVICE FOR DRAWING-FRAMES.

SPECIFICATION forming part of Letters Patent No. 494,673, dated April 4, 1893.

Application filed December 2, 1892. Serial No. 453,868. (No model.)

To all whom it may concern.-

Be it known that I, ALONZO FALLS, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Stop-Motion Devices for Drawing-Frames, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to stop-motions for drawing frames, and more particularly to the stop-motion devices acting in such machines upon the fibrous material between the delivering pairs of drawing-rollers and the calender-rolls which feed the fibrous material into the can or other receptacle placed to receive it, the said stop-motion devices operating to arrest the motion of the machines whenever the sliver passing to the calender-rolls becomes too thin, breaks, or runs out, and whenever thick places appear therein.

The object of my invention is to provide an improved stop-motion of this class, of simple and durable construction.

The invention consists in certain features of improved, simple and durable construction and arrangement, and in certain novel and useful combinations of parts, and first will be described with reference to the accompanying drawings, and then will be particularly pointed out and clearly defined in the claims at the close of this specification. 4

In the drawings, Figure 1 is a view in side elevation, with certain parts in transverse section, of a part of a drawing-frame with my invention applied thereto. Fig. 2 is a View in plan of the parts which are represented in Fig. 1. Fig. 3 is a view in section on the line 33 of Fig. 1. Fig. 4 is a view in section on the line 4i4= of Fig. 1. Fig. 5 is a detail view showing a slight modification.

At 1 is shown part of the frame-work of the drawing-frame.

At 2 are shown the drawing-rollers.

At 3 is shown the trumpet located in front of the drawing-rollers.

At 4 are shown the calender-rolls. At 5 is shown the supporting stand for the said calender-rolls.

At 6 is shown one of the detector-spoons located on the receiving side of the drawingrollers.

At 7 is shown the rail or bar on the uppermost edge of which the detector-spoons are pivoted.

At 8 is shown the striker-shaft which in practice is oscillated by known means, and at 9 is shown a striker carried by the shaft 8 and engaging with the hooked lower ends of the detector-spoons when the slivers passing over the upper ends of the said detector-spoons break or run out.

All of the foregoing parts are or may be of usual construction, and may be operated in any suitable or known manner.

It will be understood that the parts connected with the striker-shaft will be arranged to stop the machine when the movement of said shaft is arrested.

In accordance with my present invention, I provide on the frame-work 1 a stand 10 which I utilize as a pivotal support for the trumpetlever 11 and the stop-lever 12. By preference, the two levers just mentioned are pivoted by a single pin 13 to the upper end of the stand 10, the trumpet-lever being formed with the ofi-setting lug 14 on the under side thereof, and the pivotal-pin 13 passing through the lug. The trumpet lever has pivoted thereto the sliver-plate 15, which latter has formed therein near its forward end a hole in which the trumpet 3 is placed, and at its rear end has lugs 16 through holes in which is passed the pin 17 whereby the sliver-plate is pivoted to the trumpetlever. The sliverplate constitutes a supporting arm for the trumpet. Normally the said sliver-plate 15 rests on the upper side of the forward extension or arm 18 of the trumpet-lever, and the trumpet-lever and the said sliver-plate ordinarily move as one around the pivot of the trumpet-lever. The trumpet and the sliverplate may be swung backward out of close proximity to the calender-rolls when it is desired to expose or uncover the said rolls, as is occasionally necessary when the attendant cleanses the machine or removes waste. The sliver-plate is pivoted at such a distance from the bite of the calender rolls as to enable the said rolls to be completely uncovered and the trumpet to be removed entirely out of the way by simply throwing back the plate and trumpet. The rear arm of the stop-levernormally rests against a part of the framing of the machine, as shown in the drawings, and the said lever has a forwardly-projecting contact-arm 20 which extends beneath the sliverplate into position to be struck thereby, at a point in advance of the pivotal points of the trumpet-lever and stop-lever, when the tru inpet and the sliver-plate are depressed. The rear arms of the trumpet-lever and stop-lever are prolonged so that their free ends are located closely adjacent to the striker-shaft 8, on which latter is mounted a second striker 19 which plays in proximity to the said ends. By preference, the rearwardly-extending arms of the levers, which are made heavy enough to overbalance the forwardly-extended arms thereof and the parts which are sustained by thelatter, are formed parallel, or substantially so, and the free ends of the said rearwardlyextending arms are adjacent to each other. It is not absolutely essential that the said rear arms of the levers should be parallel with each other throughout their whole length, the requisite being that their free ends shall terminate near to each other and to the path of the striker 19.

During the normal working of the drawing-frame having my improved stop-motion devices applied thereto, the trumpetis dragged down by the frictional resistance to the slippin g of the fibrous material through the stricture thereof, and thereby the trumpet lever is turned on its pivot so as to raise its rear end above the path of the striker 19, and the said end will not act to stop the movement of the said striker and the striker shaft. W hen the trumpet is not dragged down, owing to the breakage or absence of the sliver, or to the same becoming too thin, the rear arm of the trumpet-lever is permitted to descend so that its free end arrives in the path of movement of the striker l9,'whereupon it arrests the movement of the latter and the strikershaft, and occasions the stoppage of the machine, as will be understood. So long as the fibrous material continues properly to pass through the trumpet, the trumpet is dragged down by the frictional resistance aforesaid until the sliver-plate bears upon the contactarm 20 of the stop-lever, the point of contact being in advance of the points at which the trumpet-lever and stop-lever are pivoted, the stop-lever constituting a countei weighted stop against which the sliver-plate or arm is held down while the frictional resistance continues, it operating to arrest the movement of the trumpet-lever so long as the frictional resistance does not rise above a predetermined limit. XVhen the trumpet is so forcibly dragged down by the frictional resistance as to cause the stop-lever to be turned on its pivot, as will occur when an undulyincreased bulk of fibrous material reaches the trumpet,

the free end of the rear arm of the stop-lever is carried into the path of movement of the striker 19, with the result that the latter is arrested in its movement and the machine is stopped.

The striker 19 instead of being arranged on an oscillating shaft may be mounted and actuated in any other known and suitable manner. In some cases I may provide for causing the forwardly extending arm of the trumpet-lever, instead of the sliver-plate, to bear against the contact-arm when the trumpet is dragged down as herein described as is shown in Fig. 5. A suitable weight, 21, may be hung to the rear arm of the stop-lever when it is desired to increase the amount of frictional resistance which must exist in order that the stop-lever may be moved.

I claim- 1. The combination of the trumpet, the trumpet-lever, and the stop-lever, the said levers having adjacent pivotal points and rearwardly-extending arms, and the stop -lever having also a contact arm projecting forwardly in advance of the pivotal points of both levers, the said contact arm being struck and depressed by a part moving with the trumpet and the rear end of the said stop-lever being thereby raised in case of excessive movement of the trumpet occasioned by the passage of an unduly increased bulk of fibrous material, with a striker playing adjacent to the free ends of the said rearwardly-extending arms and adapted to engage with either thereof when the latter are moved into its path, substantially as described.

2. The combination of the trumpet, the trumpet-lever on which the trumpet is pivotall y mounted with capacity for being swung out of the way, and the stop-lever having a forwardly projecting contact arm against which the pivoted arm or support of the trumpet is borne, and whereby the rear end of the stop-lever is raised in case of excessive movement of the trumpet occasioned by the passage of an undue bulk of fibrous material, the said levers having the free ends of their rearwardly-extending arms adjacent to.

each other, with a striker playing adjacent to the free ends of the said rearwardly-extending arms and adapted to engage therewith when they are moved into its path, substantially as described.

8. The combination of the trumpet, and the trumpet-lever and stop-lever mounted on a pivot in common, the said levers having the free ends of their rearwardly-extending arms adjacent to each other and the stop-leverhaving a contact-arm which is borne against in advance of the pivot into position to be struck by the part moving with the trumpet whereby the rear-end of the stop-lever is raised in case of excessive movement of the trumpet occasioned by the passage of an undue bulk of fibrous material, with the striker playing adjacent to the free ends of the said rear- IIO wardlyextending arms and adapted to engage therewith when they are moved into its path, substantially as described.

4. The combination of the trumpet, the trumpet-lever on whichthe trumpet is pivotally mounted. with capacity for being swung out of the Way, and the stop-lever having a forwardly projecting contact arm against which the pivoted support or arm of the trumpet is borne, whereby to raise the rear end of the stop-lever in case of excessive movement of the trumpet occasioned by the passage of an undue bulk of fibrous material,