US1095294A - Automatic stop for winding-gear. - Google Patents

Description

J. P. STALEY.

AUTOMATIC STOP FOR WINDING GEAR.

APPLICATION nun JUNE 21, 1913.

5, Ptented May 5, 1914.

[III/I174 a mm min. ems es r I COLD-BIA WRAP}! C(L. WASHINGTUN' 0- Cu UNITED STATES PATENT OFFICE.

JOHN FRANCIS STALEY, 0F EXI-IALL, NEAR COVENTRY, ENGLAND, ASSIGNOR OF ONE-HALF TO CYRIL FRANK JACKSON, OF BEDWORTH, ENGLAND.

AUTOMATIC STOP FOR WINDING-GEAR.

Specification of Letters Patent.

Patented May 5, 1914.

Application filed J une 21, 1913. Serial No. 775,141.

To all whom it may concern:

Be it known that I, JOHN FRANCIS STALEY, a subject of the King of Great Britain, and residing at- The Laurels, Exhall, near Coventry, Warwickshire, England, have invented certain new and useful Improvements in Automatic Stops for Winding- Gear, of which the following is a specification.

This invention relates to safety winding mechanism for the winding gear of coal pits and the like, of the type in which a pair of rotating screws are driven from the winding engine and carry travelers which are adapted to actuate the steam valve and brake mechanism through the medium of trip mechanism in the event of overwinding, winding in the wrong direction, or excessive speeds. Previous mechanism of this nature has been extremely complicated and consequently expensive. Further, when the mechanism has operated it has been a lengthy and difficult matter to reset it owing to the complication of the apparatus.

The apparatus which forms the subject of the present invention is extremely simple and can be re-set in a few seconds by the engine man alone, which is an important feature. This is accomplished by providing a single weighted steam valve-, and brake-operating lever, which is held out of operation by a single tripping arm, which is tripped directly by the travelers in the case of winding in the wrong direction, and is actuated by a pivoted lever of a special type in the event of over winding, while by pivoting the lever referred to upon the collar of a governor the same trip lever is moved if the governor collar rises too high owing to excessive winding speeds.

Apart from extraneous connections between the weighted lever and the steam valve and brake mechanism there is only a single operating lever and a single trip device which results in simplicity and cheapness of manufacture, and ease of re-setting.

As stated, trip mechanisms in themselves are not novel as in previous safety devices a number of trip devices have been provided for efiecting various purposes, which by the .present invention are carried out by a single trip device.

In the accompanying drawings, which show one method of carrying out this invent-ion, Figure 1 is a side elevation, Fig. 2

is a plan, and Fig. 3 is a transverse vertical section.

Like letters indicate like parts throughout the drawings.

In this construction, on a suitable framework are mounted two screws A and B side by side, each carrying upon it a traveler A or B These travelers, which take the form of nuts Working on the screw threads, are primarily arranged at opposite ends and the screws are connected by gearing of a suitable ratio with the winding engine. Thus the screws are geared together by spur gears C so as to rotate in opposite directions, and one screw is driven by a chain C from the shaft C which is coupled up to or rotated by the winding engine. One of the travelers may constitute an indicator to show the position of the cages and may carry a pointer (not shown) which travels over a scale marked on any suitable fixed part of the frame.

Each traveler carries at its lower end a roller D or E or some other form of runner, and a stop D or E Beneath the screws is pivoted a forked lever or stirrup F, the one end F of which is turned up to form an incline, this incline being at say the right hand side of the mechanism. The left hand end of the lever is adapted, by means of an adjustable set pin G, to trip the releasing mechanism connected to the steam valve and brake. For instance, in the case illustrated there is mounted upon a spindle H a lever J which is engaged by the set pin G. Also mounted on the spindle H is the arm K which supports the right hand end of the weighted lever K connected by a rod K to the brake mechanism. The lever K is pivoted on a spindle L on which is mounted an arm L coupled by a link L to the stop valve. Thus when the set pin G engages the lever J the brake lever is tripped and the steam valve shut ofi', so that overwinding in either direction is prevented. Thus as a traveler moves to the right, it rides up the incline F on the lever F, deflecting this, and so cut ting ofl the steam and applying the brake. When the engine is reversed the first traveler moves from right to left and the second one comes over to the right. The lever F is forked or duplicated so as to be engaged by both travelers. On the spindle H is also mounted an upwardly projecting arm or arms M which is engaged by the stops D and F1 so that a similar result is ol tained when either stop passes its left hand limit. Thus to prevent winding in the wrong direction the traveler for the time being at the left hand side, by the engagement of its stop D or E with the arm M is adapted, if moved beyond its normal limit, to actuate the steam valve and brake operating mechanism.

The lever F is pivoted to a loose collar N mounted upon a sleeve 0 actuated by a governor O the ring and the fulcrum of the lever F therefore rising and falling with the engine speed. If the speed becomes excessive the fulcrum rises higher than it should do and a cross pin R connecting the two forks of the lever F strikes a stop P causing the lever to tilt and its operative end to act on the steam valve. The collar N is acted upon by a spring Y to take the weightof the lever F.

If desired to the spindle H may be attached an arm X carrying a. weight Z adjustable along the arm so as to cause the trip lever to move rapidly directly it is actuated.

After the tripping has taken place it is merely necessary to raise the lever K against its weight and then to turn the lever X into approximately the position shown, so that the foot of the lever K engages the end of the lever K as shown in Fig. 1. The levers K and X can be lifted simultaneously by one man so that the mechanism is easily re-set.

An important improvement of the mechanism described over previous construct-ions is that the cage is practically under the control of the mechanism during the whole of the wind. Examining Fig. 1 and assuming that the mechanism is operating the right hand traveler A is in contact with the lever P which lever is gradually rising owing to the increasing speed. By the time it has reached the horizontal part. of the lever the pin R- is practically in contact with the stop P, for the mechanism may be so set that at normal winding speeds this pin is all but in contact with the stop ready for immediate operation if the speed rises but the slightest bit above the maximum. As the traveler A passes its mid position the left hand traveler B approaches the inclined part of the lever and follows the travel of this. In most mechanisms the travelers were only in a position to operate toward the ends of the wind and the cage was really not under the control of the safety device at all times.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a winding gear the combination with the winding engine, of a pair of rotatable screws adapted to be driven by said winding engine in opposite directions, a traveling nut on each screw, a single weighted brake and steam valve actuating lever, a single trip lever controlling said actuating lever, a rocking shaft carrying said trip lever, and arms on said rocking shaft adapted to be engaged by said traveling nuts so as to rock said rocking shaft to prevent winding in the wrong direction in either direction of rotation of said winding engine.

2. In a winding gear the combination with the winding engine, of a pair of rotatable screws adapted to be rotated by said winding engine in opposite directions, a traveling nut on each screw, a single weighted brake and steam valve actuating lever, a single trip lever controlling said actuating lever, a rocking shaft carrying said trip lover, a forked rocking lever adapted to be engaged by either of said traveling nuts, and an arm on said rocking shaft adapted to be operated by said rocking lever so as to rock said shaft, thereby releasing said act-uating lever to prevent o-verwinding in either direction of rotation of the winding engine.

3. In a winding gear the combination with the winding engine, of a pair of rotatable screws adapted to be rotated by said wind ing engine in opposite directions, a traveling nut on each screw, a single weighted brake and steam valve actuating lever, a single trip lever controlling said actuating lover, a rocking shaft carrying said trip lever, a governor driven from said winding engine, a forked rocking lever pivoted to said governor and adapted to be engaged by either of the traveling nuts in case of excessive speed of said winding engine, and an arm on said rocking shaft adapted to be operated by said forked rocking lever to release said actuating lever to reduce the speed of said winding engine.

l. In a winding gear the combination with the winding engine, of a pair of rotatable screws rotated by said winding engine in opposite directions, a traveling nut on each screw, a single weighted brake and steam valve actuating lever, a single trip lever controlling said actuating lever, a rocking shaft carrying said trip lever, a governor driven from said winding engine, a movable sleeve connected with said governor, a forked rocking lever pivoted to said sleeve so as to move therewith, a lateral projection on said forked rocking lever, a fixed stop in the path of said projection adapted to cause said rocking lever to swing about its fulcrum upon an upward movement of said rocking lever, and an arm on said rocking shaft adapted to be engaged by said rocking lever to release said actuating lever.

5. In a winding gear the combination with the winding engine, of a pair of rotatable screws adapted'to be rotated by said winding engine in opposite directions, a travelsaid last mentioned arm adapted to accelering nut on each screw, a single Weighted ate the movement of said trip lever. brake and steam valve actuating lever, a In testimony whereof I have signed my single trip lever controlling said actuating name to this specification in the presence of 5 lever, a rocking shaft. lizarryilngf sa-icll trig two subscribing Witnesses.

ever, arms on said roc ing s a t a apte to be engaged by said traveling nuts so as JOHN FRANCIS STALEY to rock said rocking shaft, thereby releasing g Witnesses: said actuating lever, a second arm on said ERIOH WALroRD, 10 rocking shaft, and an adjustable weight on E. ALLEN STRINGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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