US1194160A - Sylvania - Google Patents

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US1194160A
US1194160A US1194160DA US1194160A US 1194160 A US1194160 A US 1194160A US 1194160D A US1194160D A US 1194160DA US 1194160 A US1194160 A US 1194160A
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contact
cam
source
rectifier
contact members
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/54—Conversion of dc power input into ac power output without possibility of reversal by dynamic converters
    • H02M7/58—Conversion of dc power input into ac power output without possibility of reversal by dynamic converters using mechanical contact-making and -breaking parts to interrupt a single potential
    • H02M7/62—Conversion of dc power input into ac power output without possibility of reversal by dynamic converters using mechanical contact-making and -breaking parts to interrupt a single potential with electromagnetically-operated vibrating contacts, e.g. chopper

Definitions

  • WITNESSES INVENTOR 7 I BY ATTORNEY UNITED STATES PATENT OFFICE.
  • My invention relates to apparatus for rectifying alternating current and particularly to that type known as mechanical rectifiers.
  • the Object of my invention is to provide a simple, compact device of the character described which shall have few working parts, be positive in action, and readily adjustable.
  • Figure 1 is a view, in front elevation, of my rectifier
  • Fig. 2 is a View, in side elevation, of the same
  • Fig. 3 is a diagrammatic view of my rectifier and its circuits.
  • an insulating member 2 carrying fixed contact members 3 and 4.
  • Each of the contact members 3 and 4 comprises a spring and a tip of some refractory material, such, for example, as carbon, platinum, tungsten or the like.
  • Mounted on an oscillating carrier 5, is a double contact member 6 so placed as to oscillate between contact members 3 and 4.
  • the contact member 6 is also provided with refractory tips which are preferably dissimilar to those pertaining to contact members 3 and 4, in order to prevent sticking.
  • the member 5 is of substantially Y-shape and is pivotally mounted on base member 1 at the point 7 and pro- .vided with two rollers 8 and 9.
  • a cam member 10 that is driven by a synchronous motor 11.
  • Current leads extend from the two terminals 12 and 13 of an alternating current source 14 to respective contact members 3 and 4.
  • the contact member 6 is connected to the middle point of the. source 14 through a conductin spring 15 that is connected with a fixed binding post 16 on the insulating member 2.
  • Inserted in the connection between the contact member and the source 14, is the direct-current load of the rectifier, as, for example, a storage battery 17.
  • the synchronous motor 11 is driven from the alternating current source 14 by means of connections 18 and is provided with direct current excitation from a separate source 19. Obviously, the field winding Specification of Letters Yatent.
  • motor 11 may be fed from battery 17, if found desirable.
  • Cam 1O being driven in synchronism with the frequency of source 14 by motor 11, will cause the member 5 to oscillate in synchronism and thus effect contact between members 4 and 6 at such times as member 4 is positive and between members 3 and 6 at such times as member 3 is positive. It will thus be seen that contact member 6 will be, for a great portion of the time, in contact with points of positive potential and, accordingly, unidirectional pulsating current will flow from contact member 6 through load 17 to the mid point of the source 14.
  • the device may be so adjusted that the contact member 6 will touch contact members 3 and 4 only at such times as the latter are of negative polarity, under which conditions, the direction of current flow through the load 17 will be reversed. Owing to the resiliency of the contact members 3 and 4, they will remain in contact with member 6 for an appreciable length of time.
  • member 5 may be in electrical connection with contact member 6 and current be led to the latter at point 7 rather than through a spring such as 15. This system of connections is shown in Fig. 3.
  • a mechanical rectifier comprising a pair of fixed contact members mounted upon a base and insulated therefrom, a rotatable cam. a pivotally mounted, oscillatory member of Y-shape, both arms of which engage the cam, and a contact member carried by an extension of said oscillatory member and vibratory between the two fixed contact members.
  • a mechanical rectifier comprising a pair of fixed contact members mounted upon a base and insulated therefrom, a rotatable cam, a pivotally mounted, oscillatory member of Y-shape engaging the rotatable cam on substantially opposite sides thereof, a

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Percussion Or Vibration Massage (AREA)

Description

C. LE G. FORTESCUE.
CAM RECTIFIER.
APPLICATION FILED MAR. 30. 1914.
l 1 94,1 60. Patented Aug. 8, 1916.
WITNESSES: INVENTOR 7 I BY ATTORNEY UNITED STATES PATENT OFFICE.
CHARLES LE G. FORTESCUE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.
CAM-RECTIFIER.
Application filed March 30, 1914.
To all whom it may concern:
Be it known that 1, CHARLES Lu G. FOR; TESC-UE, a subject of the King of Great Britain, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Cam-Rectifiers, of which the following is a specification.
My invention relates to apparatus for rectifying alternating current and particularly to that type known as mechanical rectifiers.
The Object of my invention is to provide a simple, compact device of the character described which shall have few working parts, be positive in action, and readily adjustable.
Referring to the accompanying drawing, Figure 1 is a view, in front elevation, of my rectifier; Fig. 2 is a View, in side elevation, of the same; and Fig. 3 is a diagrammatic view of my rectifier and its circuits.
Mounted upon a base 1, is an insulating member 2 carrying fixed contact members 3 and 4. Each of the contact members 3 and 4 comprises a spring and a tip of some refractory material, such, for example, as carbon, platinum, tungsten or the like. Mounted on an oscillating carrier 5, is a double contact member 6 so placed as to oscillate between contact members 3 and 4. The contact member 6 is also provided with refractory tips which are preferably dissimilar to those pertaining to contact members 3 and 4, in order to prevent sticking. The member 5 is of substantially Y-shape and is pivotally mounted on base member 1 at the point 7 and pro- .vided with two rollers 8 and 9. Embraced by the two arms of the Y, in such position as to bear upon the rollers 8 and 9, is a cam member 10 that is driven by a synchronous motor 11. Current leads extend from the two terminals 12 and 13 of an alternating current source 14 to respective contact members 3 and 4. The contact member 6 is connected to the middle point of the. source 14 through a conductin spring 15 that is connected with a fixed binding post 16 on the insulating member 2. Inserted in the connection between the contact member and the source 14, is the direct-current load of the rectifier, as, for example, a storage battery 17. The synchronous motor 11 is driven from the alternating current source 14 by means of connections 18 and is provided with direct current excitation from a separate source 19. Obviously, the field winding Specification of Letters Yatent.
Patented Aug. 8, 1916.
Serial No. 828,209.
of motor 11 may be fed from battery 17, if found desirable.
Having thus described the construction of my rectifier, I w ll now proceed to set forth the operation thereof.
Cam 1O, being driven in synchronism with the frequency of source 14 by motor 11, will cause the member 5 to oscillate in synchronism and thus effect contact between members 4 and 6 at such times as member 4 is positive and between members 3 and 6 at such times as member 3 is positive. It will thus be seen that contact member 6 will be, for a great portion of the time, in contact with points of positive potential and, accordingly, unidirectional pulsating current will flow from contact member 6 through load 17 to the mid point of the source 14.
If desired, the device may be so adjusted that the contact member 6 will touch contact members 3 and 4 only at such times as the latter are of negative polarity, under which conditions, the direction of current flow through the load 17 will be reversed. Owing to the resiliency of the contact members 3 and 4, they will remain in contact with member 6 for an appreciable length of time.
If desired, member 5 may be in electrical connection with contact member 6 and current be led to the latter at point 7 rather than through a spring such as 15. This system of connections is shown in Fig. 3.
WVhat I claim is:
1.- A mechanical rectifier comprising a pair of fixed contact members mounted upon a base and insulated therefrom, a rotatable cam. a pivotally mounted, oscillatory member of Y-shape, both arms of which engage the cam, and a contact member carried by an extension of said oscillatory member and vibratory between the two fixed contact members.
2. A mechanical rectifier comprising a pair of fixed contact members mounted upon a base and insulated therefrom, a rotatable cam, a pivotally mounted, oscillatory member of Y-shape engaging the rotatable cam on substantially opposite sides thereof, a
' contact member carried by an extension of said oscillatory member and vibratory be- 4 tween the two fixed contact members, and
connected to each terminal of said source, a, frequency of the alternating current source. movable contact member between said fixed In testimony whereof, I have hereunto 10 contact members, and means comprising a subscribed my name this 23rd day of Mar. cam engaging the support of the movable 1914.
contact member and a synchronous motor CHARLES LE G. FORTESCUE. operating from said source and driving said Witnesses:
cam, whereby said movable contact member \V. M. MCCONAHEY,
is caused to vibrate in synchronism with the 1 B. B. HINES.
US1194160D Sylvania Expired - Lifetime US1194160A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842691A (en) * 1956-02-06 1958-07-08 Tajadura Jose Pampliega Motor dynamo
US4077591A (en) * 1977-06-30 1978-03-07 Ray Elmer C Electric switch machine for model railroads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842691A (en) * 1956-02-06 1958-07-08 Tajadura Jose Pampliega Motor dynamo
US4077591A (en) * 1977-06-30 1978-03-07 Ray Elmer C Electric switch machine for model railroads

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