US687292A - Power-transmitting device. - Google Patents

Description

No. 687,292. Q Patented Nov. 26, l90l.

" C. G. ARMSTRONG;

POWER TRANSMITTING DEVICE.

(Application filed Sept. 6, 1900.)

(No mom.

UNITED STATES PATENT OFFICE. v

CHARLES G. ARMSTRONG, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO DAVID B. CARSE, OF CHICAGO, ILLINOIS.

POWER-TRANSM ITTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 687,292, dated November 26, 1901.

Application filed $epteniher 6, 1900. Serial No. 29,153. (No model.) I

To all whom it may concern,"

Be it known thatI, CHARLES G. ARMSTRONG, acitizen of the UnitedStates, residing at Chicago, county. of Cook, and State of Illinois,

have invented certain new and useful Improvements in Power-Transmitting Devices,

(Case No. 2 5) and I do hereby declare the folface or a portion thereof energized with magnetic lines of force. The said wheel is caused to revolve in close proximity or in actual contact with a driven wheel which is susceptibje of magnetic influences and a portion of which is Within the magnetic field of the driving or prime mover.

The object of my invention is to provide a device whereby power may be transmitted 55 from one shaft to another by a means employing magnetic lines of force, and as a result the operation of the said device is noiseless, efficient, and easily controlled.

In carrying my invention into practical oporation I am enabled to transmit the rotary motion of a driving-wheel to a driven wheel through the intermediary eifect of magnetic lines of force without actual contact of the wheels and without any mechanical wear or 5 noise resulting from the contact of the surfaces of the respective moving parts.

In the drawings, Figure 1 shows a driven wheel and a driving-wheel magnetically energized in the positions they occupy when in operation. Fig. 2 shows a diagram of a source of current, the electrical circuit, and a commutator for directing the current into the respective coils that are placed upon the magnetic driving-wheel and which constitute a part of said circuit. Fig. 3 is a fragmentary section through the driven wheel A and commutator C.

In all of the views the same characters of reference are used to indicate similar parts.

In the accompanying drawings, A is a driv 50.

ing-wheel having a peripheral surface which is subject to magnetic induction. A series of radial electromagnetic cores are designated by a and are surrounded by coils a. The cores a are numbered from 1 to 14, inclusive.

C is a commutator. The commutator-sections thereof are numbered from 1 to 14, inelusive, to correspond with the cores and coils of the magnetic wheel.

The coils a are connected in series, and a branch wire joins the said connections to a respective commutator-section. The driven wheel A is provided with a series of projections similar to cores a of the driving-wheel A. These projections are numbered in a series of 1 to 14, inclusive. They are separated the same distance apart as the projections a on the driving-wheel. The projections on the driving and driven wheels are adapted to come coincidently into position when the drivingwheel is turned for the purpose of revolving the driven wheel, in which event the shafts are preferably placed such a distance apart that the projections do not quite touch each other when they occupy a position in a plane drawn through the two centers of the said wheels, as shown.

B is abattery which is an illustrative means used to energize the coils a. The battery is connected in circuit by wires 1, 2, 3, and 4 to a commutator C and to a resistance device R. Brushes Z) and I) bear upon the periph eral surface of the commutator C. The resistance R is used for the purpose of controlling the strength of the current that flows through the coils on the driving-wheel A.

The wheel A may be provided with coils and a commutator, electric battery, and circuit similar to that shown in connection with the driving-wheel A, if desirable. The arrows around the outside periphery of the wheels A and A show the direction of their r0- tation. The circuit through the coils of the driving-wheel is as follows: The current leaving the battery by wire No. I will pass by the 9 5 brush b to the commutator-section 1, thence through the coil No. 1, and thence through the coil No.2, and thence through the coil No.

3 to the brush 2), over the wires 2 and 3, the resistance-arm 0', through the resistance to the wire 4, and back to the battery, energizing coils 1, 2, and 3. Anothercircnit will be from the brush 1) through the coils 14: to 4, inclusive, and back through the same circuit. This shows the coils .1, 2, and 3 in parallel with the remaining coils upon the limbs of the said driving-wheel. By this arrangement the circuit in the driving-Wheel is never broken when a commutator-section passes out from under the brushes 1) and b; but by this arrangement the coils 1, 2, and 3, or the coils which may at the time occupy the position between the brushes shown to be occupied now by the coils 1, 2, and 3, will always be from four to five times magnetically stronger than the remaining coils upon the said Wheel. More current will flow through them, because of their lower resistance, than the joint resistance of all of the remaining coils. Ooils Nos. 1, 2, and 3 are now about five times the magnetic strength of the remaining coils on the wheel, for the reason that nearly five times as much current passes through these coils in the position they now occupy as passes through the remaining coils on the wheel. The object of continuing the circuit through the coils 14C to 4, inclusive, is to prevent the violent flash and disruptive discharge that would ensue if the circuit was broken as the coils pass out from under the commutator-brush and to prevent the violent molecular disturbance that would heat the magnetizable elements and decrease the efficiency of the device. Cores Nos. 1 and 2 form the terminals of a horseshoe-magnet and tend to thread the lines of force through the projections 1 and 2 of the wheel A. If coil No. l on the driving-wheel is raised in the process of its rotary motion, it will also raise the projection No. 1 of the driven wheel, and coil and core No. 2 will in like manner raise by attraction projection No. 2, and in this way the coils on the driver in their rotation will effect corresponding projections on the driven wheel through the intervening space by the magnetic lines of force and in this way produce the rotation of the driven wheel A. The brushes Z) and b may be adjusted so that the maximum current may be directed through any number of coils desirable which will exercise the greatest influence upon the projections' of the wheel A. WVhen the coil No. 1 has passed to the position occupied by coil 14, the magnetic effect will be so reduced and the space so increased that it will not have much, if any, retarding effect upon the projection 14 of the wheel A. The current through the operative coils is very strong. The projections on the wheel A will register exactly with the projections on the wheel A, and in that way a certain definite relation of speed is established and maintained. If, however, the current be reduced by the introduction of resistance from the rheostat R by movement of the arm 1' over the contacts 1, then the magnetic effect of the projections on the driving-wheel will not be so strong by reason of the reduced current by the interposed resistance and the projections on the driven wheel will not in every case register with those of the driving-wheel, the result of which is that the driving-wheel will then 1'0- tate proportionately faster and the speed of the driven wheel will be correspondingly reduced.

As shown in Fig. 3, the com mutatorsections c are built up on a ring or wheel 0 and held in place in a recess 0 common with commutators of this character.

I do not desire to limit myself to the exact construction of the devices shown and de scribed for the purpose of carrying into effect my invention, for I believe that I am the first to employ magnetic lines of force for the purpose of transmitting rotary power without material contact of the rotary driv-= ing device and a similar driven device.

I have used the accompanying drawings for the purpose of showing how my invention may be carried into effect.

Having described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A power-transmitting device comprising a rotary driving member, a rotary driven member, both members susceptible of magnetic influences, coils for magnetizing both membersandameansformaintainingahigher magnetic strength in a portion of both or either of said members while said portion is within a definite location with reference to the 1'0- tary path thereof, substantially as set forth.

2. A power-transmitting device comprising arotating driving member having a magnetized periphery, a means for maintaining a higher magnetic strength in that portion of the said driving member that is within adefinite location with reference to the driven member, and a driven m ember havinga peripheral surface susceptible of magnetic influence, the two members placed so that their magnetized surfaces confront each other, substantially as set forth.

3. Apower transmittingdevice comprising a rotating driving member having a magnetized periphery, a driven member having a pcripheral surface susceptible of magnetic influence, the two members placed so that their peripheral surfaces confront each other, and a means for decreasing the attractive strength of the magnetic couple of that portion of the' respective surfaces that are receding from each other to a lower magnetic condition, substantially as set forth.

4. Apower-transmittingdevice comprising a rotating, driving member, having a magnetized periphery, a driven member, having a pcripheral surface susceptible to megnetic influence, the two members placed. with their IIO peripheral surfaces in juxtaposition, a means specification, in the presence of two subscribfor increasing the attractive strength of the ing witnesses, this 31st day of August, A. D. 10 magnetic coupile of said surfaces as they ap- 1900. proach each ot er, and for decreasing the at- 5 tractive strength of the magnetic couple of CHARLES ARMSIRONG' said surfaces as they recede from each other, Witnesses: substantially as set forth. ALICE M. SPRINGER,

In testimony whereof I have signed this M. F. ALLEN.

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