US1442898A - Electromagnetically-controlled brake - Google Patents

Description

Jan 23, 1923.

M. E. NEENAN ET AL. -ELECTROMAGNEIICALLY CONTROLLED BRAKF 2 SHEETS-SHEET if ORIGINAL FILED JUL'Y23, 1918.

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Jan: 23, 1923. Y 1,442,898. M. E. NEENAN ET AL.

ELECTROMAGNEIICALLY CONTROLLED BRAKE.

' ORIGINAL FILED JULY 23. 1918- 2 SHEETS-SHET Z.

IN VEN 70 R M55441 E IVEtW/I/V JOHN J NE E N AN Patented Jinn. 23, 119233..

UNHTED stares rarest MICHAEL E. NEENAN AND JOHN J. NEENAN, OF NEW YORK, N. Y., ASSIG-NORS TO NEEIQ'AN ELEVATOR CORPORATION, A CORPORATION OF NEW YORK.

ELECTROMAGNETICALLY-CONTROLLED BRAKE.

Application filed July 23, 1918, Serial No. 246,409. Renewed July 8, 1921.

To all whom it may concern:

Be it known that we, MICHAEL E. NEENAN and Join! 'J. NEENAN, citizens of the United trolled Brakes, of which the following is a'" specification.

This invention relates to improvements in the arrangement and construction bf electromagnetically controlled brakes particularly adapted for the control of elevator or like apparatus. Thev device ofour present invention is designed particularly to produce a de: vice which will be positive and dependable in its action, durable, of well balanced construction and of an improved construction possessing a greatly increased area ofeifective braking surface whereby high efliciency in its operation is secured.

The described-and other valuable features of our invention are illustrated in the accompanyirig drawings wherein like reference characters are applied to the corresponding partsin theseveral views.

Referring to thedrawing, Fig. 1 is a View in side elevation illustrating a preferred em bodiment of the features of our invention. Fig. 2 is a similar view from t e opposite side thereof. Figs. 3 and 4 are -news in sideelevation showing desirable modified forms of the device. Fig. 5'is an end elevation of the embodiment shown in Fig. 1. Fig. 6 is a similar view of the construction shown in Fig. 2. Fig. 7 is a longitudinal sectional view of a desirable magnet construction. F ig. 8 is a similar view showing a modified forni thereof and Fig. 9 is a plan view of the brake sho e supporting members of Fig. 1.

Referring to the drawings wherein we have shown desirable embodiments of our invention, 1 indicates a brake drum or cylinder mounted upon the usual brake shaft 2 which in the manner'we'll understood is'connected to the elevator, derrick, winch, or other apparatus to be controlled. I

In accordance with our invent-ion we provide oppositely arranged and pivotally supported brake members or brake shoes 3 and 4: to have frictional braking engagement with the peripheral surface of the brake drum 1. As shown, the brake members 3 and 4 are pivotally supported up a bearing fierial No. 483,343.

pin 6 fitted to a supporting standard or base 7. The respective brake members 3 and 4 are each formed with their opposed or inner surfaces substantially conforming in contour to the peripheral surface of the drum 1, and upon their inner surfaces they are each provided with suitable friction metal or other material best suited to produce the desired braking eife'ct. Means are provided normally to exert pressure upon the brake members to force them into braking contact with the drum. A simple and efi'ective means is here shown for this purpose, con-, 'sisting of a pressure bolt 8 fitting apertures in the upper end portions of each of the brake members above the drum and having its ends extending at each side outwardly from the brake members. The outwardly extended ends of the bolt are threaded as shown to receive the bearing nuts 9 and lock nuts 10 and interposed between the bearing nuts and suitable bearing shoulders 11 formed on the brake members the compression springs 12 12 are arranged and held by suitable washers 13 13. As readily understood the pressure of the springs 12 is regulated by adjusting the nuts 9 and the pressure thus determined normally will be efiective to press the brake members into engagement with the brake drum 1. The arrangement as described is simple and substantial and employs braking surfaces acting upon both sides of the brake drum and upon substantially the entire peripheral surfaceof the drum so as to obtain a very eifective braking effort. Moreover this arrangement asillustrated, requires but the single resilient or pressure element, or means, to actuate botlnof the brake-members and further .attendantupon this arrangement the adjusting of te bearing nuts 9+9 determines the pressure to be exerted upon both of the brake memberswyhereby the braking pressures are perfectly balanced, resulting in equal wear upon the surfaces.

To release the brake when it is desired so as to permit the rotation of the drum, elec tro-magnetically operated means are employed, as here shown, consisting of a magthe pressure of the springs 12 and away from frictional engagement with the drum. This may be effected with magnets of various designs and arrangements.

In Figs. 1 and 2 we have shown a desirable construction wherein the brake-members are each formed with outwardly extending arm portions 14-14 which are formed and arranged in crossed-over relation to'overlie the drum and are provided with rearwardly directed opposed shoulders 15-15. The magnet M is positioned between these shoulders,

being supported by a suitable bracket 16. This magnet may be of conventional doublesolenoid type comprising a suitable coil 17 having movable armatures 18 -18 which are drawn inwardly under the influence'of the field of the coil when the latter is energized. As shown the outer end of the armamovement.

tures are passed through the shoulders 15 and have the nuts 19-19 threaded on their outer ends to engage the shoulders. In the manner readily understood when the magnet is energized, its cores or armatures are moved inwardly and the engagement of the nuts 19 with the shoulders -15 imparts the -movement to the brake members-whereby they are moved outwardly away from the braking engagement with the drum and against the influence of the springs. By the described simple arrangement we have pro-- vided for theseparation of the brake mem-.

bers by a magnet employing inwardly drawn armatures.

In Figs. 3, 4,, 7 and we'have shown arrangements wherein'in accordance with my invention special forms of magnets are employed whichare arranged to release the brake members by a separating or outward In the construction there shown the brake-members are each provided with an upwardly extending arm or shoulder 14 on its own side of the drum and the magnet M employed is designed to impart an outwardly directed separating movement thereto. a

In the'construction of igs. 3 and 7 the coil 17 is wound upon the core tube 21 to which are secured the usual retaining collars 22 22 for the coil. These-parts are, as shown, supported in stationary position by a suitable bracket. The magnet is pro- .vided with the oppositely arranged mov-' able armatures or solenoid cores 23--24 slid-.

30 passed through apertures in the shoulders 14 of the brake members 3 and 4- and provided on their outer ends with retaining nuts 31 and also provided with inner shoalders 33 to engage the shoulders 14 to impart theoutward thrust thereto.

Means areshown adapted to limit the separating movement of the brake members consisting of a threaded rod 34 extending through both of the shoulders '14 and having stop nuts 36-86 on its outwardly extended .ends;

InFigs. 4 and 8 we have shown further desirable modification wherein the magnet coil is not stationary supported but is connected to and carried by one of the brake members while the armature is connected to the other of the brake'members. As shown, the ,coil support 40 has laterally extending perforated ears 4l42. A pivoted pin 43 is fitted to one of the ears and to the shoulder 14 of the brake member 4 whereas the perforation'of the eat 41 is in the form of a slot 44 in whichla pin 45 carried by the brake-member?) is fitte d whereby the magnet coil is supportedand movably connected to one of the brake members 4 as shown. The armature 47 of the magnet as best shown in Fig. 8 is provided witlra connection 49 which is connected-at its other end to the brake member 3. In this arrangement the slot 44 and pin fitted thereto may act to limit the separating movement of the parts. \Vhile we have described and illustrated desirable embodiments of our invention it will be understood that many other modifications thereof can be made without departaving described our invention, we claim:

ing engagement "and electro-magnetic means connected to the arm portions of the respec" tive shoes and adapted to release the brake:

having arm portions at their upper ends ex;

tending inwardly to overlie the drum and each extending to the opposite side of the neutral axis, resilient pressure. means operative to apply equal pressures upon each of the brake-shoes normally to force them inwardly into braking engagement with the drum, an electric magnet interposedjbetween the arm portions of the shoesand having oppositely movable armatures connected tothe respective arm portions and operative to separate the brake-shoes when energi sed, su stantially as described;

3. "A device of the eeharacter described comprising a rotatable :drumwandqoppositely arranged movahle brake shoe' 77 adapted for frictionalabraking engagement with the drum, said brake shoes having arm portions at their upper ends extending inwardly to overliethe drum and each-extendingto theop'posife side of the neutral axis, resilient pressure means operative to apfply each-'pressurehupon each of the brake rmem b egs normally to force them into brak-' ing engagement with the drum, means to adjust the pressure imparted by the pressure means, anelectro-ma-gnet interposed between the armpo'rtionsof the shoes and having 0ppositely movable armatures connected to the respective arm portions and operative to separate the brake-shoes when ener ized.

4, A device of' the character. described comprising a rotatable drum-and oppositely arranged brake-shoes pivotally supported centrally below the drum and adapted for frictional engagement with the drum, said brake-shoes having arm portions at their upper ends extending inwardly over the drum to theoppositeside of the neutral axis thereof with' their extremities in opposite V relation, a pressure bolt arranged to extend 50 I members, adj ustablebearing nuts threaded on the ends of saidbolgficoinpression springs interposedbetweenthe-nuts-and the brakeshoes and operative to force the shoes into braking engagement with the drum and an electric solenoid ma net connected to the op posed extremities oi the arms and operative to releasethe shoes from the braking engagement.

5. A device ofthe character described comprising a rotatable drum and oppositely arranged brake-shoes pivotally supported centrally below the drum and adapted for frictional engagement with the opposite pespective arms of the shoes,

members i ripl eral surfaces of' the drum. said brakeshoes having arm portions at their upper ends extending inwardly over the drum to the opposite side of the neutral axis thereof with their extremities in opposite relation, a pressure-bolt arranged to extend out-wardly through each of the brake-members, adjustable bearing nuts threaded on the ends of said bolt,' compression springs interposed between the nuts and the brake-shoes and op-, erative to force theshoes into brakin contact with the drum and a solenoid electric magnet connected to the opposed extremities of the arms and operative to release the shoes from braking engagement and said solenoid having oppositely movable armatures and connections from the armatures to the resubstantially as described.

6. A device of the character described comprising a rotatable drum suitabl'y'journalled and oppositely arranged arcuate brake-shoe members pivotally supported centrally with relation to the drum. said brake shoes havingarm portions at their upper-ends extending inwardly over the drum and each having its end portion extended to the opposite sideof thecentral vertical plane of the drum whereby the said end portions are in crossed relation, resilient pressure means operative to move the" brake-shoe members into braking en- ,m'embers pivotally supported centrally beneath the drum, said brake-shoes havin arm'portions at their upper ends exten ing inwardly over the drum and each haviu its end portion extended to the opposite side of the central vertical-plane of the drum whereby the said end portions are in crossed relation, resilient pres- 7 sure means operative to move the 'brakeoutwardly through each of the brake-shoe.

shoe members into braking engagement and Signed at New York city in the county of New York and State of New York this 3d vday of June A.

D.,' 1918. I MICHAEL E. NEENAN. 1 JOHN J. NEENAN. Witnesses:

SAMPSON H, SCHWARZ, CLARENCE S. AsHLE'Y.

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