US882607A - Magnetic clutch. - Google Patents

Description

PATENTED MAR.-24, 1908.

I No. 882,607.

R. ANDERSON. MAGNETIC GLUTGH. APPLIOATION FILED SEPT.18, 1906.

2 SHEETS-$11331 IL.v

/m/enZ 0r" Robertflnderson,

away.

Witnesses:

PATENTED MAR. 24, 1908.

R ANDERSON. MAGNETIC CLUTCH. APPLICATION FILED SEPT. 18, 1906.

2 SHEETS-SHEET 2.

- W/Lnesses: Mventdr:

' Robert finder-son,

by WM 1 ROBERT ANDEBSON, OF SCHENECTADY, NE

W YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

MA GNE TIC CLUTCH.

No. 882,607. Specification of Application filed September T all whom it may concern:

Be it known that I, ROBERT ANDERSON, a subject of the King of Sweden, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Magnetic Clutches, of which the following is a specification.

My invention relates to magnetic friction' clutches, and its object is to provide a novel clutch construction of high efficiency, in which the clutch parts are wholly inclosed. One feature of my invention consists in providing a clutch-magnet with two armatures arranged on opposite sides of the magnet movable towards each other into engagement therewith. This construction gives a large frictional drag with a small magnetizing current as compared with struc tures employed heretofore.

My invention further consists in providing a casing carried by either the driving or driven shaft completely inclosing the magnet and armatures, so as to protect them frominjury, and still further consists in arranging this casing so that it forms a suitable drum for a band brake, thereby particularly adapting the clutch for use in hoists and similar work.

My invention will best be understood by reference to the accompanying drawings, in which Fi urel shows a cross-sectional view of a clutc constructed in accordance with my invention; Fig. 2 shows an end view with a portion of the casing andone of the armatures removed; and Figs. 3 and 4 show similar views of a modified construction.

V Referringfirst to Figs. 1 and 2, A andB rep resent two aXially-alined shafts, of which A may be the driving shaft, and B the driven. C represents the clutch-magnet which is carried by and surrounds the shaft A. D rep resents the magnetizing winding, which extends circumferentially' around the shaft, .and' is connected to collector-rings d'. The

imagnet C is formed with radially projecting poles, all of which lie in the same plane, but

which extend outward alternately from opposite sides of the winding D. Alternate Boles are, consequently, of the same polarity. represents an inclosing casing, which is inst to the shaft B, and which completely incloses the magnet C. This casing may be sleeved on the shaft A, as shownjlso as to Letters Patent. Patented March 24, 1908 18,1906. Serial No. 335,079.

make an air-tight inclosure for the magnet. Two armatures F are keyed on the inner periphery of the casing E on opposite sides of the G are placed between the armatures, so as to energized. When the windin with current, both armatures F are simultaneously drawn axially intofrictional engagement with the poles of the magnet C, so as to transmit power from one shaft to the a suitable drum for a band brake H, which may be controlled in any well known manner, either mechanically. or electrically, through the pivoted lever I. The clutch is and other apparatus requiring a brake.

In the construction shown in Figs. 3 and 4, the magnet C is arranged without oles and consists of a disk-shaped member ormed of two parts in the shape of concentric rings, between which is mounted the magnetizing coil D. This coil is held in place between two rings (1 which may be of brass or othernon-magnetic material, which serve to unite the construction shown in these figures the flux produced by the coil D passes through the two armatures-in series. The arrangement of the compression springs G is slightly otherwise, the construction is similar. The band brake is not shown in these figures.

Many other modifications in the construction and arrangement of parts may be made without departing from the spirit of my invention. What I claim as new and desire to secure by Letters Patentof the United States, is,-

1. A magnetic clutch comprising a magnet, an energizing Winding therefor, and two mechanically connected armatures on opposite sides of said magnet movable towards each other into engagement with said magboth armatures simultaneously.

2.. In amagnetic clutch, in combination with a shaft, a magnet carried by and surrounding the, shaft, an energizing Winding therefor, and two mechanically-connecte rin -shaped armatures on o posite sides of sai magnet axially movab e into engagepoles of the magnet 0. Compression springshold them away from the magnet C, as shown in Fig; 1, when the Winding D-is not:

is supplied other. The periphery of the casing E forms' consequently well adapted for use in hoists the two rings which form the magnet C. In

different from that shown in Fig. 1, but

net, the magnet being arranged to attract springs between ment with said magnet, the magnet being arra ed to attract both armatures simultaneous y. 1

3. A magnetic clutch comprising a magnet, an energizing winding therefor, two mechanically-connected armatures on .o posite sides of-said magnet movable towardb each other into engagement with said magnet, the magnet being arranged to attract both armatures simultaneously, and compression said armatures adapted to move them apart when'said engaging Wind- 'ing is deenergized.

fi. In a-magnetic clutch, in combination with a shaft, a magnet carried by and surrounding the shaft, an energizing winding therefor, two mechanically-connected ringshaped armatures on opposite sides of said ma net axially movablev into engagement with said magnet, the magnet being arranged to attract both armatures simultaneously, and compression springs between said armatures adapted to move them apart when said energizing winding is denergized.

5.. In a ma netic clutch, in combination with axially-aimed driving and driven shafts,

, a magnet carried by and surrounding one of said shafts, an energizing winding therefor, and tworing-shaped armature-s carried by the other shaft on opposite sides of said magnet and axially movable into engagement therewith the magnet being-arranged to at.

tract both armatures simultaneously.

a' r 6; In a magnetic clutch, in combination other shaft on'op' osite sides '40 ing carried by magnet, and two armatures carried within said casing on op osite sides of said magnet and axially mova le into engagement therewith, the magnet being arranged to attract both armatures simultaneously.

8. In a magnetic clutch, in combination with aXially-alined driving and driven shafts,

a magnet carried by and surrounding one shaft, an energizing winding therefor, a cas- 1ng carried by the other shaft mclosing said magnet, two armatures carried within said casing on opposite sides of said magnet and axially movable into engagement therewith.

the magnet being arranged to attract both armatures simultaneously, and compression springs between said armatures adapted to move them apart when said energizing winding is'denergized.

9. In a magnetic clutch, in combination with axially-alined driving and driven shafts, a magnet carried by and surrounding one shaft, an energizing winding therefor, a easing carried by the other shaft inclosing said magnet, two ring-shaped armatureskeyed on the inner periphery of said. casing on opposite sides of said armature and axially movable into engagement therewith. and compression springs between said arniatures adapted to force them apart when said energizing winding is denergized.

10. In amagnetic clutch, in conibina vn with axially-aimed driving and driven sh;v its,

a magnet carried by and surrounding one of said shafts, an energizing winding therefor, tworing-shaped other shaft on opposite sides of said magnet and axially movi ole into engagement therewith, the magnet being arranged to attract both arinatures, a casing carried by one of said shafts. inclosing the magnet and armatures, and a brake-band engaging the periphery of said casing.

, In Witnesswhereof. I have hereunto set my hand, this 17th day of September, 1906.

ROBERT ANDERSON.

-Witnesses:

' BENJAMIN B. HULL,

HELEN ORFORD.

armatures carried by they

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