US166471A - Improvement in governors for electric motors - Google Patents
Improvement in governors for electric motors Download PDFInfo
- Publication number
- US166471A US166471A US166471DA US166471A US 166471 A US166471 A US 166471A US 166471D A US166471D A US 166471DA US 166471 A US166471 A US 166471A
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- US
- United States
- Prior art keywords
- arms
- circuit
- governors
- rotation
- armature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 241000282619 Hylobates lar Species 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000003292 diminished Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/063—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current using centrifugal devices, e.g. switch, resistor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S388/00—Electricity: motor control systems
- Y10S388/923—Specific feedback condition or device
- Y10S388/924—Centrifugal device, e.g. governor
Definitions
- Figure 1 is a view in elevation of the apparatus
- Fig. 2 is a plan view of the same.
- the nature of this invention consists in the combination, with a rotatory electromagnetic motor, ofa conical pendulum rotating with the shaft of the motor and a suitable circuit-closer, so arranged and constructed, as hereafter described, that on any increase of the amplitude of the rotation of the pendulum beyond a certain limit, owing to an' increase in the rate of rotation of the motor, an interruption in the succession of currents through the magnets of the motor will be caused, and its rate of rotation be consequently reduced until the desired limit is reached.
- A is a suitable base-board supportingan ordinary upright electro magnet, E, and M is the armature of the same, which consists of two bars crossing each other at their centers at right angles, and is mounted upon a shaft, S, properly supported on a frame, F, in 'such a manner that the armature rotates in a plane at right angles to the axis of the magnet.
- a collar Surrounding the shaft, but not rotating with, and insulated from the same by a collar, I, of any suitable insulating material, is a fixed col lar of metal, K, provided with four projecting arms, a a. t
- the frame B is the frame inclosing the motor, and attached to the base board A, and from the frame at O is suspended the conical pendulum H.
- the lower end of this pendulum rests in a slotted arm, D, which is attached at right angles to the shaft S, and rotates with it.
- the lower end of the pendulum is also provided with a spring, I), having a flexible end, which just touches the arms a a as the pendulum rotates.
- the current from the battery passes from P by suitable connections through the electromagnet E to one of the arms of the collar K, which thus acts as a circuit-closer, and thence, when the pendulum is in contact with any one of the arms a, by the spring-connection to the frame F, and thence back to the battery at N.
- the apparatus operates as follows: When the battery-circuit is closed, and the spring b is in contact with any one of the arms a a of the circuit closer K, (which arms must be so situated relatively to the arms of the armature M that this contact takes place when one of the arms of the armature is near one of the poles of the magnet,-) the armature will be attracted and the shaft will rotate until the pendulum comes in contact with the next arm of the circuit closer, when the circuit will be again closed, the next armature will be attracted, and the rotation of the armature will be continued.
- the arms a a are so constructed that by bending the same the point at which the pendulum fails to make contact can be adjusted to any desired rate of rotation, and the pendu lum is also capable of vertical adjustment for the same purpose.
Description
Governors for Electric Motors.
No. 166,47], 7' Patented Aug.10,l875.
UNI'IED STATES PATENT OFFIo'n AUGUSTUS MAG OONNE L, on CAMBRIDGE, MASSACHUSETTS.
IMPROVEMENT lN GOVERNORS FOR ELECTRIC MOTORS.
Specification forming part of Letters Patent No. 166,471, dated August 10, 1875; application filed April 15, 1875.
To all whom it may concern:
Be it known thatI, AUGUSTUS MAoOoNNnL, of Cambridge, in the county of Middlesex, State of Massachusetts, have invented a new and useful Improvement in Governors for Electro Magnetic Engines, of which the following is a full, clear, and exact description, reference being had to the drawing accompanying and forming part of this specification.
In the drawing, Figure 1 is a view in elevation of the apparatus, and Fig. 2 is a plan view of the same.
In these figures similar letters refer to similar parts.
The nature of this invention consists in the combination, with a rotatory electromagnetic motor, ofa conical pendulum rotating with the shaft of the motor and a suitable circuit-closer, so arranged and constructed, as hereafter described, that on any increase of the amplitude of the rotation of the pendulum beyond a certain limit, owing to an' increase in the rate of rotation of the motor, an interruption in the succession of currents through the magnets of the motor will be caused, and its rate of rotation be consequently reduced until the desired limit is reached.
In the accompanying drawing, A is a suitable base-board supportingan ordinary upright electro magnet, E, and M is the armature of the same, which consists of two bars crossing each other at their centers at right angles, and is mounted upon a shaft, S, properly supported on a frame, F, in 'such a manner that the armature rotates in a plane at right angles to the axis of the magnet.
Surrounding the shaft, but not rotating with, and insulated from the same by a collar, I, of any suitable insulating material, is a fixed col lar of metal, K, provided with four projecting arms, a a. t
B is the frame inclosing the motor, and attached to the base board A, and from the frame at O is suspended the conical pendulum H. The lower end of this pendulum rests in a slotted arm, D, which is attached at right angles to the shaft S, and rotates with it. The lower end of the pendulum is also provided with a spring, I), having a flexible end, which just touches the arms a a as the pendulum rotates.
The current from the battery passes from P by suitable connections through the electromagnet E to one of the arms of the collar K, which thus acts as a circuit-closer, and thence, when the pendulum is in contact with any one of the arms a, by the spring-connection to the frame F, and thence back to the battery at N.
The apparatus operates as follows: When the battery-circuit is closed, and the spring b is in contact with any one of the arms a a of the circuit closer K, (which arms must be so situated relatively to the arms of the armature M that this contact takes place when one of the arms of the armature is near one of the poles of the magnet,-) the armature will be attracted and the shaft will rotate until the pendulum comes in contact with the next arm of the circuit closer, when the circuit will be again closed, the next armature will be attracted, and the rotation of the armature will be continued. If, however, the rate of the rotation of the armature increases beyond any desired limit, the amplitude of therotation will be increased, and it will fail to make contact with the arms of the circuit-closer, and consequently the succession of currents through the electromagnet will be interrupted, and the rate of rotation of the machine will be diminished until the former rate is reached.
It is obvious that, by means of this governor, the rotation of the engine will be maintained at a uniform rate for the reason the slightest increase in velocity causes an increase in the amplitude of the rotation of the pendulum, and consequently prevents the closing of the circuit by the arms of the circuit-closer.
The arms a a are so constructed that by bending the same the point at which the pendulum fails to make contact can be adjusted to any desired rate of rotation, and the pendu lum is also capable of vertical adjustment for the same purpose.
In using this apparatus, in combination with an electro-magnetic motor for driving the machinery of a chronograph, it is sometimes desirable, in order to insure a uniform rate of rotation with absolute certainty, to connect a chronometer in the circuit, which chronomet'er causes the closing of the circuit once in every Second in the usual manner, at a time when one of the arms of the armature is approaching the poles of the magnet in advance of the closing of the circuit by the arms of the circuit-closer K, and consequently, if the rate of rotation of the motor should become slightly retarded, the closing of the circuit by the chronometer once every second will cause an acceleration of the rate and keep it uniform.
I can use this form of governor with an y form of rotatory electromagnetic engine, whether the same is provided with one or more magnets, and I do not limit myself to any particular number of arms upon the armature or upon the circuit-closer. I have found that four arms are sufficient to give accurate results.
AUGUSTUS MAOGONNEL.
Witnesses:
A. M. SHURTLEFF, A. L. HAYES.
Publications (1)
Publication Number | Publication Date |
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US166471A true US166471A (en) | 1875-08-10 |
Family
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Family Applications (1)
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US166471D Expired - Lifetime US166471A (en) | Improvement in governors for electric motors |
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US (1) | US166471A (en) |
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- US US166471D patent/US166471A/en not_active Expired - Lifetime
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