Patent US3763340A successfully refreshed from Google Patents.
US3763340A
Expired / Lapsed
US
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High-voltage circuit breaker equipped with means for placing a resistor in parallel with the breaker contact during breaker closing operations
Assignee: Siemens AG
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Filing: 1972-04-03
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Granted: 1973-10-02
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Expires: 1992-04-03
Abstract
Abstract A high-voltage circuit breaker has a primary switch, an auxiliary switch and a resistor connected in series with said auxiliary switch. The serial combination of the resistor and the auxiliary switch is in parallel with the primary switch. The primary switch and the auxiliary switch have a common mechanical drive movable to various positions for actuating the switches. The auxiliary switch has a spring for holding it in the open position and a force-coupled connector is provided for forcecoupling the drive to the auxiliary switch. The connector is disengageable from the drive in dependence upon the position of the drive. When the breaker operates, the auxiliary switch closes prior to the closing of the primary switch and opens again after the primary switch is closed.
Inventors
- 👤 D Noack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:06
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/12; H01H33/16; H01H33/166
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
223 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; mechanical drive means comprising a common drive movable to different positions for actuating said switches; said auxiliary switch comprising a spring for holding said auxiliary switch in the open position; and force-coupled connection means for force-coupling said drive to said auxiliary switch and for disengaging said drive in dependence upon the position of said drive, said auxiliary switch further comprising a set of two contacts, at least one of said contacts being a movable contact connected to said force-coupled connection means for contacting the other of said contact in a butt-like manner when said auxiliary switch is closed, said movable contact being a composite member comprising a rear part connected to said forcecoupled connection means, a forward part for contacting said other contact, said forward part being longitudinally displaceable with respect to said rear part to an extended position for increasing the total length of said movable contact, and a spring disposed between said forwarD part and said rear part for holding said forward part in said extended position, whereby said movable contact member becomes shorter when moved into contact with said other contact.
Claim 2
Dependent Claim
223 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; mechanical drive means comprising a common drive movable to different positions for actuating said switches; said auxiliary switch comprising a spring for holding said auxiliary switch in the open position; and force-coupled connection means for force-coupling said drive to said auxiliary switch and for disengaging said drive in dependence upon the position of said drive, said auxiliary switch further comprising a set of two contacts, at least one of said contacts being a movable contact connected to said force-coupled connection means for contacting the other of said contact in a butt-like manner when said auxiliary switch is closed, said movable contact being a composite member comprising a rear part connected to said forcecoupled connection means, a forward part for contacting said other contact, said forward part being longitudinally displaceable with respect to said rear part to an extended position for increasing the total length of said movable contact, and a spring disposed between said forwarD part and said rear part for holding said forward part in said extended position, whereby said movable contact member becomes shorter when moved into contact with said other contact.
Claim 3
Dependent Claim
67 words
A high-voltage circuit breaker of claim 1 connected into a high-voltage line for switching the same, said breaker comprising primary switch actuation means connected to said common drive for closing said primary switch at the end of a time period after said auxiliary switch is closed, said time period being determined by said resistor and the capacitance and characteristic impedance of the line switched by the breaker.
Claim 4
Dependent Claim
56 words
A high-voltage circuit breaker according to claim 1 comprising an additional primary switch connected to said common drive and an additional auxiliary switch connected to said common drive, each of said additional switches being driven by said common drive and being disposed symmetrically with respect to corresponding ones of said first mentioned primary and auxiliary switches.
Claim 5
Dependent Claim
194 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; mechanical drive means comprising a common drive movable to different positions for actuating said switches; said auxiliary switch comprising a spring for holding said auxiliary switch in the open position; and force-coupled connection means for force-coupling said drive to said auxiliary switch and for disengaging said drive in dependence upon the position of said drive, said common drive being a rotatable drive shaft, said force-coupled said connection means comprising a rod connected to said auxiliary switch and having a slot therein, a crank mounted on said drive shaft and having a crank pin engaging said slot, and blocking means for blocking the free movement of said pin in said slot in dependence upon the position of said crank so as to provide a removable force-coupled connection between said shaft and said auxiliary switch, whereby said crank actuates said auxiliary switch via said rod when rotated by said drive shaft and when said pin is blocked.
Claim 6
Dependent Claim
194 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; mechanical drive means comprising a common drive movable to different positions for actuating said switches; said auxiliary switch comprising a spring for holding said auxiliary switch in the open position; and force-coupled connection means for force-coupling said drive to said auxiliary switch and for disengaging said drive in dependence upon the position of said drive, said common drive being a rotatable drive shaft, said force-coupled said connection means comprising a rod connected to said auxiliary switch and having a slot therein, a crank mounted on said drive shaft and having a crank pin engaging said slot, and blocking means for blocking the free movement of said pin in said slot in dependence upon the position of said crank so as to provide a removable force-coupled connection between said shaft and said auxiliary switch, whereby said crank actuates said auxiliary switch via said rod when rotated by said drive shaft and when said pin is blocked.
Claim 7
Dependent Claim
131 words
The high-voltage circuit breaker of claim 4, wherein said crank is rotatable by said shaft between end positions, and wherein said rod has an end connected to said auxiliary switch, said blocking means comprising a stop cam articulately joined at said end of said rod and blocking the free movement of said crank pin in said slot in dependence upon the position of said crank, and a cam spring pressing against said stop cam for holding said cam in a blocking position to block said crank pin, and displacement means for overcoming the force of said cam spring and displacing said stop cam from said blocking position when said crank reaches one of said end positions thereby removing the block to the free movement of said crank pin in said slot.
Claim 8
Dependent Claim
14 words
The high-voltage circuit breaker of claim 5, said cam spring being a leaf spring.
Claim 9
Dependent Claim
76 words
The high-voltage circuit breaker of claim 5, comprising a housing surrounding said drive shaft and said force-coupled connection means, said housing having an inner wall surface, said displacement means comprising an abutment formed on said inner surface, and a projection extending laterally from said stop cam, said projection having a length sufficient to strike said abutment and displace said stop cam against the force of said cam spring when said crank reaches said one end position.
Claim 10
Dependent Claim
215 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; and-mechanical drive means for actuating said switches, said mechanical drive means including a drive movable between first and second positions for opening and closing said primary switch, a sPring for spring holding said auxiliary switch in the open position thereof, force-coupled connection means for transmitting a force from said drive to said auxiliary switch sufficient to overcome the resisting force of said spring and to close said auxiliary switch before said drive closes said primary switch and to then reopen said auxiliary switch after said drive closes said primary switch in the movement of said drive to said second position, and means for disengaging said force-coupled connection means from said drive in dependence upon the position of said drive in the movement from said first position to said second position whereby the force of said spring acts on said auxiliary switch to spring hold the same in said open position thereof and whereby said auxiliary switch is not actuated when said drive returns from said second position to said first position to open said primary switch.
Claim 11
Dependent Claim
215 words
A high-voltage circuit breaker comprising a primary switch; an auxiliary switch; and a resistor connected in series with said auxiliary switch, the serial combination of said resistor and said auxiliary switch being connected in parallel with said primary switch; and-mechanical drive means for actuating said switches, said mechanical drive means including a drive movable between first and second positions for opening and closing said primary switch, a sPring for spring holding said auxiliary switch in the open position thereof, force-coupled connection means for transmitting a force from said drive to said auxiliary switch sufficient to overcome the resisting force of said spring and to close said auxiliary switch before said drive closes said primary switch and to then reopen said auxiliary switch after said drive closes said primary switch in the movement of said drive to said second position, and means for disengaging said force-coupled connection means from said drive in dependence upon the position of said drive in the movement from said first position to said second position whereby the force of said spring acts on said auxiliary switch to spring hold the same in said open position thereof and whereby said auxiliary switch is not actuated when said drive returns from said second position to said first position to open said primary switch.
Claim 12
Dependent Claim
113 words
The high-voltage circuit breaker of claim 8, said drive being a rotatable drive shaft, said force-coupled connection means comprising a rod connected to said auxiliary switch and having a slot therein, a crank mounted on said drive shaft and having a crank pin engaging said slot, said means for disengaging said force-coupled connection means including blocking means for blocking the free movement of said pin in said slot in dependence upon the position of said crank so as to provide a removable force-coupled connection between said shaft and said auxiliary switch whereby said crank actuates said auxiliary switch via said rod when rotated by said drive shaft and when said pin is blocked.
Claim 13
Dependent Claim
141 words
The high-voltage circuit breaker of claim 9 wherein said crank is rotatable by said shaft between end positions corresponding to said first and second positions, and wherein said rod has an end connected to said auxiliary switch, said blocking means comprising a stop cam articulately joined at said end of said rod and blocking the free movement of said crank pin in said slot in dependence upon the position of said crank, and a cam spring pressing against said stop cam for holding said cam in a blocking position to block said crank pin, and displacement means for overcoming the force of said cam spring and displacing said stop cam from said blocking position when said crank reaches the end position corresponding to said second position thereby removing the block to the free movement of said crank pin in said slot.
Claim 14
Dependent Claim
14 words
The high-voltage circuit breaker of claim 10, said cam spring being a leaf spring.
Claim 15
Dependent Claim
81 words
The high-voltage circuit breaker of claim 10, comprising a housing surrounding said drive shaft and said force-coupled connection means, said housing having an inner wall surface, said displacement means comprising an abutment formed on said inner wall surface, and a projection extending laterally from said stop cam, said projection having a length sufficient to strike said abutment and displace said stop cam against the force of said cam spring when said crank reaches said end position corresponding to said second position.
Claim 16
Dependent Claim
135 words
The high-voltage circuit breaker of claim 8, said auxiliary switch comprising a set of two contacts, at least one of said contacts being a movable contact connected to said force-coupled connection means for contacting the other of said contacts in a butt-like manner when said auxiliary switch is closed, said movable contact being a composite member comprising a rear part connected to said force-coupled connection means, a forward part for contacting said other contact, said forward part being longitudinally displaceable with respect to said rear part to an extended position for increasing the total length of said movable contact, and a spring disposed between said forward part and said rear part for holding said forward part in said extended position, whereby said movable contact member becomes shorter when moved into contact with said other contact.
Claim 17
Dependent Claim
67 words
A high-voltage circuit breaker of claim 8 connected into a high-voltage line for switching the same, said breaker comprising primary switch actuation means connected to said common drive for closing said primary switch at the end of a time period after said auxiliary switch is closed, said time period being determined by said resistor and the capacitance and characteristic impedance of the line switched by the breaker.
Claim 18
Dependent Claim
56 words
A high-voltage circuit breaker according to claim 8 comprising an additional primary switch connected to said common drive and an additional auxiliary switch connected to said common drive, each of said additional switches being driven by said common drive and being disposed symmetrically with respect to corresponding ones of said first mentioned primary and auxiliary switches.
Claim 19
Dependent Claim
67 words
A high-voltage circuit breaker of claim 4 connected into a high-voltage line for switching the same, said breaker comprising primary switch actuation means connected to said common drive for closing said primary switch at the end of a time period after said auxiliary switch is closed, said time period being determined by said resistor and the capacitance and characteristic impedance of the line switched by the breaker.
Claim 20
Dependent Claim
56 words
A high-voltage circuit breaker according to claim 4 comprising an additional primary switch connected to said common drive and an additional auxiliary switch connected to said common drive, each of said additional switches being driven by said common drive and being disposed symmetrically with respect to corresponding ones of said first mentioned primary and auxiliary switches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |