US1579549A - Brake-operating mechanism for electric hoists and the like - Google Patents

Description

April 6 ,1926. V v

H. H.. LOGAN Ira-19,549

ANISM F OR ELEC JTRIC HOISTS AND THE LIKE BRAKE OPERATING uncn Fiied Feb. 11; 1924 ATTORNEYS Maia,

To all whom it'mag concern:

Patented Apr. 6, 1926.

H, ji'i'oGAN, or oit'loneo, ILLINOIs iiRAKE-orERA'rrNG ilrnoirn iirsm rou ineohmicorers AND THEL'IKE.

Application filed li'ebrnary 11, 1924'. Serial 1T0. 692,120.

Be it kn wn that LHENRY Leann, a subject'of the King of England, =.2anda resident of Chicago, county of'Cook, State,

of Illinois, have invented-a newia-nd useful Improvement in Brake Operating'Mech anisin for Electric Hoists and em like, of which the tollow-ingis a full, clear, and exact description. 7 p

My invention relates to improyem'ents in brake operating mechanism: for electric hoists and the like, and more particularly to a device for the purpose 'ofreg'uflating the speed at which the brakes are applied, and

it'consis'ts in the combinations, constructions,

and arrangements herein described and claimed. g

An object of my invention is to. provide a mechanism of the character :de'scribedwhieh when properly connected with a {brake en'- g'ine-and a hoist control otthetype'shown in the patent toLil-ly No. 1,3 14,675, Septe-mber 2, 19119 United States, willefllect the immediate ope-ration of the brakeswhen the hoistis in a position-to ,br'i ng-t'he' cage or 7 skip to either of its l in'i its1oif traV-e l', or which 5 pear in the following specification, andthe will effect a gradual operation ofitlh'e'brake mechanism-when the hoist is in such a posi- ;tion as *toc'ause "the' cage or skip'to be away from its limits of travel. y i

A'Ifurther "objectgot my -1ni"ent1on isto provide a brake operating"mechanism, for

"electric "hoists and thelike which is entirely automatic in operation and therefore not dependent upon the actions-of the engineer in any way. V 7 *fur'thei objec't oi my invention is to provide a brake operating mechanism ior electric hoists and the like which may be :used

"with any of the ordinary types of brakeengines, either gra'vity operated or hydraulic.

A iiurther object of my invention isto pro vide a device of the typedescribedin'Whichmeans is provided capable of manual fad- 'justment "for limiting the :desired movement of the solenoid :co're upon the graduated :cam

member, whereby the speed of the operation 7 brake 0 erati-nm mechanlsnl and which o tathe brake mechanism 'i n'ay be fi1rtl1er regul'ated. v

-Other objects and advantages will apnovel features of the invention will be .particularly pointed out in the 'appendedio'laims.

My invention is illustrated in the accom -p'ai ng' drawings, form1ng part of this tap- :plic a't ionfin which" I Figure 1 is a sideeleva-tion of ment of my invention, and I Figurej2is a side elevation ofa nodified form'of apart of the mechanism illustrated in' Figure 1 Y 1 :Inearrying out inyi-n'i entioinrl make use thereupon. The dial 1 is arrangedtoturn, and 1S synchronized with the hoist drumof an embodi- 0i a cam diall,- having a cam member2 amine-hoist, (not shown) in such a manner as to cause the cam 2 to engage with ,a roller i3lca-rr1od upon; a pivotally supported rocker -ar1n4wl1en the skip or cage operated by the hoist is adjacent to either of its limits of travel, 1 p 1 V 1 I The cam dial 1 is shown in the Lil'ly Pat- -ent-No. '1,31:4:, 675,at 45 in Figure 1. It is connected by iflneansof a chain 30 -to a gear 26 arr-an-gledto turn with the hoist drum- 16 through a series of gears and shaftsindi- 'cated at 26, 27,128, 29 anclBO. The equivalent of the cam? in-thejLilly patent is found 1neither,of:tlie:twQ.;cams 7T v j A rod 5" ispivotally connected at 56 with the roelrerarm -e; WA bell cranlrZ', pivotally ni'QunteCl'atS, is aproyided with a weight; 9 atthe outermost Lend of tl1e greater;ar n thereof A rode is ,piiiot ally' connected 1a-t-10 with the %bell crank 7, inter1 nediate the weight 9and the mess of the crank arm.

I A sliding-stop member"1E1,. mounted in a withvthe roller iot the rocker arm 45.; The

outermost end ,ofthe stop ;member 1,1 has; a

substantially inclined surface, provided with a psluralityof steps 14-eachone receding further than the adjacent step, so that the step adjacent to the outermost end of the stop 7 member-:11 is closer to-the slide-way-lQ than that :oneadjacent to the body of the -stop member 11,"(see Figure 1').

7 The electrical equipment employed in 'my :forms :a iv'ita'lppart of :the brake {engine operating means, consists in a solenoid-l5 con inected by means of: lead Wires 16 to Janelectrio circuit in EWh-ill .a switch 17 and ,a ourrent sourcetl-s iomnapart} a e. :In {the :a'ioremerit'ioned Lilly iPatent No.

1,314,675 f the equivalent -of :the "rocker arm Land'the l'lEOd 5 :may :be found imthe rocker substantially horizontal plane; and arranged arm 79 and the rod 80. Particular attention is called to Figure 7 of the Lilly patent. The counterpart of the switch 17 in the Lilly patent is found in the switch illustrated in Figure 5 of which 52 and 53 are the contacts which when contacted with one another close a circuit to cause a weighted arm to fall. In my present invention, the switch 17 instead of closing upon the overspeeding of the hoist opens, thus permitting the solenoid to be de-energized.

A stationary supporting frame having members 19 has secured to it the solenoid 15 and is provided for slidably supporting a T- shaped solenoid core 20 in the manner shown in Figure 1. A movable core supporting frame having vertical supporting rods 21 is provided by means of which the core 20 is supported relative to the members 19. The upper ends of the rods 21 are secured together by a yoke 22 forming a part of the frame which is pivotally connected at 23 to a connecting rod 24. The rods 21 are slidably projected through the supporting members 19.

A. stop screw 25 is disposed at the lowermost end of the core 20 and arranged for movement inwardly or out from the core 20, by rotation thereof, the screw 25 being provided with a hexagonal collar 26. A lock nut 27 provides ample means for locking the screw 25 against unintentional movement.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. Let us assume in the present installation of the device that the connecting rod 24 is connected directly with the valve of a brake engine of the hydraulic type, which is quite common in use, and that the cam dial 1 is properly synchronized with a hoist drum. If new the hoist drum is in such a position as to bring the cage or skip in the mine shaft at a point remote from the limits of travel, my improved brake operating mechanism will assume the position shown in Figure 1, i. e., the bell crank 7 will lie in such a position that the upper surface adjacent to the upper step 1 1 of the stop member 11 exactly underlies the stop screw 25. Let us assume that the switch 17 is opened. Current from the current source 18 will cease to flow through the solenoid, and the core 20 will dorp, being limited in its downward movement by con-- tact of the stop screw 25 with the stop member 11. As the core moves downwardly, the connecting rod 24 will move also and actuate the valve heretofore referred to, as forming a part of the hydraulic control of the brake engine. As a result, the brake engine will operate, but not suddenly, as movement of the valve is relatively slight.

If the switch 17 should open through overspeeding of the hoist drum when the cam member 2 is in engagement with the roller 3 of the rocker arm 4:, or is partially in engagement therewith, then the bell crank 7 will be moved against the force of the weight 9 and one of the steps 14 of the stop member 11 will underlie the stop screw 25, depending entirely upon what portion of the cam 2 is in contact with the roller 3. Let us assume that the camroller 3 is in engagement with the highest part of the cam 2. In this event, the outermost end 14: will underlie the stop screw 25 and permit the full downward movement of the core 20 so as to open the valve forming a part of the brake engine hydraulic system fully, thereby setting the brakes quickly. This is necessary, sinceif the cam 2 is in engagement with the roller 3, the hoist drum must be in a position which would bring the cage or skip adjacent to one of its limits of travel, either at the top or the bottom of the shaft.

It should be noted of course that my improved brake operating mechanism is not entirely limited in its application to hydraulic brake engines, and may be used with any type of gravity actuated brake engines which employ an adjustable cateract cylinder.

In Figure 2 I have shown a modified form of the stop member 11, in which the steps 14: are dispensed with, and a smooth inclined plane 29 is provided in their stead. The operation of this form of my invention is precisely the same as the preferred form, save for the fact that the degree to which the brake engine may be operated in units of time is more finely determined.

I claim:

1. An actuating mechanism for the control member of a brake engine comprising a solenoid, an electric circuit including a switch and said solenoid, whereby the opening of said switch may occasion the deenergization of said solenoid, a core in said solenoid arranged to drop when said solenoid is deenergized, a connecting rod associated with said core and arranged for connection with the control member of a brake engine, a stop engaging member carried by said core, a

.stop member having a substantially inclined surface arranged to receive the stop engag ing member on said core when said core is dropped, and a cam'operated means associated with said stop member for moving said stop member substantially at right angles with the direction of movement of said core, depending upon the instrumentality of said cam operated means, whereby the moment of travel of said core is determinable by the position of said stop member, and therefore the degree to which said brake engine control member is actuated is also determinable by the position of said stop member relative to said core.

2. An actuating mechanism for the control member of a brake engine comprising a solenoid, an electric circuit including a 1 carried by said core, a stop member assoswitch and said solenoid,a core for said solenoid arranged to drop whenrsaid solenoid is deenergized, a connecting rod asso ciated with said core and arranged for connection with the control member of a brake engine, an ad ustabIe stop engaging member ciated with said core andhavinga substantially inclined surface arranged to receivesaid adjustable member in engagement there- 'with when said'core is dropped and to limit the downward movement of said core, a weighted member for normally maintaining said stop member in such a position as to permit minimum movement of said core when said solenoid is deenergized, as by op:

eration of said switch, and cam operated means associated with said weighted member for elevating said weighted member, whereby said stop member may move and the lower portion of the inclined surface thereof may be in registration with the adjustable stop engaging member, thereby permitting av greater movement of said core downwardly,

the degree to which said stop member is moved being directly determinable by the instrumentality of said cam actuated means.

3; An actuating mechanism for the 0011- trol member of a brake engine comprising a solenoid, an electric circuit including a 7 switch and said solenoid, a core for said solearm associated with said connecting rod at the opposite end thereof, and a cam member arranged to engage with said rocker arm to cause the elevation of said weighted member to a degree determinable by the instrumentality of said'cam, 'wherebysaid stop member may moverelati've to said stop engaging member on said core and the lower'- most parts of the substantially inclined surface thereof may lie in registration with said adjustable stop engaging member to permit greater movement of saidcore'i event of the opening of said switch.

4.7 An actuating mechanism for the control member of a brake engine comprising asole-v noid, an electric circuit including a switch and said solenoid, a core for said solenoid arranged to drop when said solenoid is deenergized, an ad ustable stop engaging member carried by said core, connectinginea-ns carried by said core and arranged forconnection with the control member of abrake engine, a regulating'stopmember associated with said core and having a substantially inclined surface, a weighted member for maintaining saidgregulating stopmemher in such a POSltlOH as to permit minimum moveinent of sa d core downwardly, a connecting rod connected with said weighted member, cam means arranged for synclironism with the hoist drum of a mine hoist and means arranged to cause the elevation of said weighted member to a degree determinable by the instrumentality of said cam, whereby said regulating stop member may move relative to, said stop engaging :member on said core and the lowermost parts of the substantially inclined surface thereof may lie in registration with said adjustable stop engaging member to permit greater movement of said core in the said switch.

n the event of the opening'of HENRY n. LoeANQ V

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