US1162573A - Automatic brake mechanism. - Google Patents

Description

W. F. CONKUN. AUTOMATIC BRAKE MECHANISM. APPLICATION man IuIIE 3. 1'914.

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WILLAM F.l CCNKLIN, OF TARENTUM, PENNSYLVANIA.

AUTOMATC BRAKE MECHANISM.

T o all whom t may concern:

Be it known that l WILLIAM F. CONKLIN, a citizen of the United States, residing at Tarenturrn in the county ofAllegheny and like, to absorb back lash, prevent racing, and

to continuously provide a retarding friction at all times of a substantially uniform degree, and at the same time prevent the use of unnecessary friction and resulting waste of power. p

While the invention is adapted t'o any mechanism in which the conditions are simi-V lar and in which it is 'desired to provide such braking action or retardation, the improvement is particularly applicable to control the rolls of a rolling mill. 4

It is a well-known fact among rolling mill operators, especially sheet rollers, that a momentary stop or shock occurs when a sheet of hot steel is passing between the rolls, because of an uncontrolled back lash, lost motion, or other inequality in operation. This objection is completely overcome by my invention.

In the drawings, showing such adaptation, Figure 1 is a view in sectional elevation` indicated by the line I. I. of Fig. 2,

box, not shown, with the roll or rolls of a train.

In the particular adaptation of the j invention. the member 2A is shown as-an actual roll, which may be a used roll of a train. or especially designed, aspreferred, it being understood however that the particular construction of the cylindrical member 2 is not essential, and the invention is applicable Specication of Letters Patent.

retained nrw. so, mit.

Application led Iune. 1 914. Serial No. 842,807.

or otherwise, due to wear upon its surface. rI.`h 1s statement. is made because of the facihty of utilizing used or worn rolls in connection with the braking mechanism, for economy.

At each side of the roll member 2 are casings 3, 3, the numerals generally indiIl eating the rectangular box structures adapt ed to contain the operative mechanism, and which are mounted upon the usual foundation bed plate members 4, 4, of a rolling mill. 1 The casings 3 are rigidly braced and connected by suitable framing caps 5 above and the main housing member 6 below, between which at the end portions ofthe structure are interposed the roll bearings 7,.for the necks of the roll member 2. The housing members. 6 extend from one bed plate 4 to this means the housings G may be spaced apart as desired to provide for varying lengths of roll members 2.

The roll or journal member l is engaged at one or both sides by braking shoe elements 8 which as shown are blocks of wood or other suitable material, and which are forced as worn against the cylindrical surface endwise of the grain. The friction blocks 8 are within the housing 3 and behindv the blocks is the pusher or follower 9 slidably mounted within the housing.

A plunger 10 is provided interiittingr with follower 9 and a temper screw 11 is thread,- ed into a nut 1Q thereof. Between the plun ger 10 and follower 9 is interposed a cushioning spring 13 for compensation of inequalities` etc.. in the roll or for providing a degree ofresilience between the positively actuated nut and the friction blocks, and to keep a constant tension on blocks 8.

A removable plate 3, closes the friction block space, and may be removed when .it is necessary to vrenew the blocks. and then screwed down tight Aby bolts and nuts, as shown.

Screw 11 extends outwardly through the end of the casi-ng 3 or anend plate 3. thereon, andis provided with a gear, as a worm wheel 14, such construction being in duplicatefor exerting pressure throughout the length of the roll 2, the plungers'ilO vbeing 'providing plungers at each side.

preferably connected by a cross bar 15, thus Worm Wheels 14 are in mesh with a wormlt operable lto actuate them together, and upon the upper end of the worm shaft is rotatably` mounted a drumll? having a pawl 18 engagi ing a ratchet wheel 19 secured to the worm shaft and operable to rotate theshaft in one direction but ,to. run free in the reverse directioi. i'

A cab e 20. is'wouiid on the drum 17 and is passed around sheaves 21, 22, supported in bracket23 and is provided with an actuating counterweight 24.

The steady 'pull of the counterweight operates to exert turning pressure on the worm gearing and screw 11, tending to constantly feed the friction blocks 8 inwardly against theroll 2 as they wear away, thus maintaining a uniform braking pressure at all times.

When desired, the weight may be raised and the cable rewound on the drum 17 by merely reversing it freely of the ratchet mechanism, when the weight will again exert its Aforce to continue the screw feed of the friction blocks. These may be renewed as worn, and

the device will thus maintain any desired degree of frictional pressure on the roll, depending on the weight of element 24.

As shown the construction is the same at each side of the roll, but it will be understood that it may be .employed at one side' or two, and with a single or double screw and Worm wheel, according to the friction 1 desired.

water pan 25 is arranged below the roll member 2 and provides water into which is immersed the roll and its necks for a conthat itfmay be changed or varied to suit different conditions of use ory otherwise by 'the skilled mechanic, but that all such changes are to be considered as within the scope of the following claims.

"What I claim is:

1. The combination with a rotatable cylinfor said screw, and a weight operatively con-l nected .with said gearing.

3. The combination with a rotatable cylindrical member, of friction shoes, a follower, a screw,I a plunger loperated -thereby and adapted to exert pressure against the fols lower, a worm wheel on said screw, a worm having a drum, and a cable engaging said drum provided with guiding mechanism and a Weight.

4. Friction mechanism of the class de- A scribed consisting of a casing, -friction members therein, a follower therefor, a plunger,

a spring between the follower and plunger, a sdrewV for the follower provided with a worm wheel, a worm therefor having a shaft provided with a drum having ratchet connection with the shaft, a supporting bracket having guiding sheaves, and a flexible element connected with the v drum passing around said sheaves and provided with a terminal counterweight.

In testimony whereof I hereunto aix my signature 'in the presence of two witnesses.

WILLIAM. F. CONKLIN.

Witnesses:

- I-LHECK,

C. M. CLARKE.

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