US2709207A - Circuit breaker arm - Google Patents

Circuit breaker arm Download PDF

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Publication number
US2709207A
US2709207A US255453A US25545351A US2709207A US 2709207 A US2709207 A US 2709207A US 255453 A US255453 A US 255453A US 25545351 A US25545351 A US 25545351A US 2709207 A US2709207 A US 2709207A
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US
United States
Prior art keywords
circuit breaker
lever
rubbing block
breaker arm
arm
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
Application number
US255453A
Inventor
Stanley M Udale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Holley Performance Products Inc
Original Assignee
Holley Carburetor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Holley Carburetor Co filed Critical Holley Carburetor Co
Priority to US255453A priority Critical patent/US2709207A/en
Application granted granted Critical
Publication of US2709207A publication Critical patent/US2709207A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/02—Advancing or retarding ignition; Control therefor non-automatically; dependent on position of personal controls of engine, e.g. throttle position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • Figure 1 is a plan View.
  • Figure 2 is a partial crosssectional elevation on plane 2 of Figure 1.
  • Figure 3 is an elevation of the parts shown in Figure 1.
  • 10 is the pivot on which the circuit breaker arm 12 oscillates, and this arm is made of a stamping.
  • 14 is the movable tungsten contact carried by the arm 12.
  • 11 is the stationary contact (ground) which is carried by an ear projecting from the plate 15 which is adjustably mounted on the adjustable plate 17, indicated by a broken line.
  • Two screws 19 and 21 bolt the circuit breaker arm support 15 to the circuit breaker plate 17.
  • Another car 23 projects from the plate 15 and to which is connected an electrical connection 25.
  • a spring 16 which is also the conductor, leads current from the connection 25 to the movable tungsten contact point 14.
  • An insulating bushing 27 insulates the pin 10 from plate 15.
  • An insulation (not shown) insulates the electrical conductor 25 from the plate 15.
  • a roller 20 of fiber is held by the indentations 29 and 31 in the walls 37 and 37 which project as ribs stamped from the arm 12 and hold the roller 20 in place (although permitting it to rotate slowly) during the operation of the device.
  • the roller 20 is engaged by a cam 33 driven by a shaft 35 so that the contacts 11-14 are open from time to time.
  • roller 20 will wear at a low rate of speed so that it will not wear much faster than the contacts 11-14 burn. However, if it must be replaced, it is a simple matter to remove the roller 20 and replace it with a new one.
  • a stamped metal circuit breaker arm of channel form the two sides having dependent elements folded back on themselves to provide a lateral spring support, conical projections from said sides, a cylindrical rubbing block, having conical indentations, two corresponding conical depressions in sides of said cylindrical rubbing block into which the conical projections fit.
  • a lever, 21 support therefor, a spring engaging said lever, a contact carried on the end of the lever, a stationary contact with which the movable contact is adapted to engage under the influence of said spring, the improvement which consists of a rotatable, detachable, cylindrical rubbing block adapted to move the contact against the spring, additional spring means for holding the roller in a specific location on the lever and to permit the rubbing block to rotate slowly, and in which the rubbing block has conical, concave identations and in which the lever has convex conical projections, a yieldable support for said projections, the rubbing block being held in place by the conical projection.
  • a lever a support therefor, a spring engaging said lever, a contact carried on the end of the lever, a stationary contact with which the movable contact is adapted to engage under the influence of said spring
  • the improvement which consists of a rotatable, detachable, cylindrical rubbing block adapted to move the contact against the spring, additional spring means for holding the roller in a specific location on the lever and to permit the rubbing block to rotate slowly, and in which the rubbing block has conical, concave indentations and in which the lever has convex conical projections, a yieldable support for said projections, the rubbing block being held in place by the conical projection, and in which the rubbing block is made of insulating material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Description

M53 5. M. UDALE CIRCUIT BREAKER ARM Filed Nov. 8, 1951 Fiji 1 J INVENTOR.
United States Patent (IIRCUIT BREAKER ARM Stanley M. Udale, Detroit, Mich, assignor to Holley Carburetor Company, Detroit, Mich, a corporation of Michigan Application November 8, 1951, Serial No. 255,453
3 Claims. (Cl. 200-30) The object of this invention is to facilitate the servicing 1."
of a circuit breaker arm in an ignition system now in universal use on automobiles. At the moment, whenever a circuit breaker lever is bady worn, the whole lever is thrown away. If the entire insulated rubbing block could be detached, a suitable saving could be made. Moreover,
it is desirable to increase the life of the wearing point so that it does not wear faster than the two tungsten points of contact burn. If the insulated rubbing block could be detached and replaced, a considerable saving could be made. This is not commercially possible with the present -i construction, as the insulating blocks are riveted to the arm. I have discovered that a rotatable, detachable roller of insulated material will solve the problem.
Figure 1 is a plan View. Figure 2 is a partial crosssectional elevation on plane 2 of Figure 1. Figure 3 is an elevation of the parts shown in Figure 1.
In the figure, 10 is the pivot on which the circuit breaker arm 12 oscillates, and this arm is made of a stamping. 14 is the movable tungsten contact carried by the arm 12. 11 is the stationary contact (ground) which is carried by an ear projecting from the plate 15 which is adjustably mounted on the adjustable plate 17, indicated by a broken line. Two screws 19 and 21 bolt the circuit breaker arm support 15 to the circuit breaker plate 17. Another car 23 projects from the plate 15 and to which is connected an electrical connection 25. A spring 16, which is also the conductor, leads current from the connection 25 to the movable tungsten contact point 14. An insulating bushing 27 insulates the pin 10 from plate 15. An insulation (not shown) insulates the electrical conductor 25 from the plate 15. A roller 20 of fiber is held by the indentations 29 and 31 in the walls 37 and 37 which project as ribs stamped from the arm 12 and hold the roller 20 in place (although permitting it to rotate slowly) during the operation of the device. The roller 20 is engaged by a cam 33 driven by a shaft 35 so that the contacts 11-14 are open from time to time.
2,709,207 Patented May 24, 1955 2 Operation The roller 20 will wear at a low rate of speed so that it will not wear much faster than the contacts 11-14 burn. However, if it must be replaced, it is a simple matter to remove the roller 20 and replace it with a new one.
What I claim is: 1. A stamped metal circuit breaker arm of channel form, the two sides having dependent elements folded back on themselves to provide a lateral spring support, conical projections from said sides, a cylindrical rubbing block, having conical indentations, two corresponding conical depressions in sides of said cylindrical rubbing block into which the conical projections fit.
2. In a device of the character described, a lever, 21 support therefor, a spring engaging said lever, a contact carried on the end of the lever, a stationary contact with which the movable contact is adapted to engage under the influence of said spring, the improvement which consists of a rotatable, detachable, cylindrical rubbing block adapted to move the contact against the spring, additional spring means for holding the roller in a specific location on the lever and to permit the rubbing block to rotate slowly, and in which the rubbing block has conical, concave identations and in which the lever has convex conical projections, a yieldable support for said projections, the rubbing block being held in place by the conical projection.
3. In a device of the character described, a lever, a support therefor, a spring engaging said lever, a contact carried on the end of the lever, a stationary contact with which the movable contact is adapted to engage under the influence of said spring, the improvement which consists of a rotatable, detachable, cylindrical rubbing block adapted to move the contact against the spring, additional spring means for holding the roller in a specific location on the lever and to permit the rubbing block to rotate slowly, and in which the rubbing block has conical, concave indentations and in which the lever has convex conical projections, a yieldable support for said projections, the rubbing block being held in place by the conical projection, and in which the rubbing block is made of insulating material.
References Cited in the file of this patent UNITED STATES PATENTS
US255453A 1951-11-08 1951-11-08 Circuit breaker arm Expired - Lifetime US2709207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US255453A US2709207A (en) 1951-11-08 1951-11-08 Circuit breaker arm

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US2709207A true US2709207A (en) 1955-05-24

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956142A (en) * 1958-08-15 1960-10-11 Hamilton Watch Co Electric time piece contact mechanism
US3090842A (en) * 1961-01-30 1963-05-21 Motoronics Inc Multi-surface contacts for interrupters
US3575579A (en) * 1969-12-10 1971-04-20 Patrick J Mcgannon Improved cam follower roller structure for distributor contact breaker arm
US3619521A (en) * 1968-12-13 1971-11-09 Bosch Gmbh Robert Improved circuit-breaking contact assembly for automotive distributors
US3749862A (en) * 1970-10-28 1973-07-31 Westinghouse Electric Corp Switch-operating mechanism with protective shutter
US4058692A (en) * 1976-11-29 1977-11-15 Clark William E Contact breaker assembly with breaker arm spacer block

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US984564A (en) * 1910-01-19 1911-02-21 Laurence B Holt Ignition-timer for internal-combustion engines.
US1356532A (en) * 1918-09-17 1920-10-26 Splitdorf Electrical Co Combined timer and distributer
US2246922A (en) * 1937-11-08 1941-06-24 An S I M B I Soc Rotary frequency reducer for electromagnetic hammers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US984564A (en) * 1910-01-19 1911-02-21 Laurence B Holt Ignition-timer for internal-combustion engines.
US1356532A (en) * 1918-09-17 1920-10-26 Splitdorf Electrical Co Combined timer and distributer
US2246922A (en) * 1937-11-08 1941-06-24 An S I M B I Soc Rotary frequency reducer for electromagnetic hammers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956142A (en) * 1958-08-15 1960-10-11 Hamilton Watch Co Electric time piece contact mechanism
US3090842A (en) * 1961-01-30 1963-05-21 Motoronics Inc Multi-surface contacts for interrupters
US3619521A (en) * 1968-12-13 1971-11-09 Bosch Gmbh Robert Improved circuit-breaking contact assembly for automotive distributors
US3575579A (en) * 1969-12-10 1971-04-20 Patrick J Mcgannon Improved cam follower roller structure for distributor contact breaker arm
US3749862A (en) * 1970-10-28 1973-07-31 Westinghouse Electric Corp Switch-operating mechanism with protective shutter
US4058692A (en) * 1976-11-29 1977-11-15 Clark William E Contact breaker assembly with breaker arm spacer block

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