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Patent US3697709A successfully refreshed from Google Patents.
US3697709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bypass and isolation switch
Assignee: Automatic Switch Co
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Filing: 1971-12-20
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Granted: 1972-10-10
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Expires: 1991-12-20
Abstract
Abstract A switch including three conductors for connection, respectively, to a normal power source, an emergency power source, and a load, as well as three conductors for connection to an automatic transfer switch. An isolating switch contact is located between each power source conductor and one of the transfer switch conductors, and a bypass contact is located between the load conductor and the third transfer switch conductor. Manually operable control means are provided for opening and closing the isolating switch contacts, and for positioning the bypass contact so that it engages either its respective transfer switch conductor or one of the power source conductors. An interlock forming part of the control means prevents opening of the isolating switch contacts unless the bypass contact is engaging one of the power source conductors. The interlock also prevents disengagement of the bypass contact from either power source conductor unless the isolating contacts are closed. The control means also includes means defining only a limited number of stable positions of the bypass contact.
Inventors
- 👤 Dominik M Witkor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:14
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/46; H01H33/52; H01H31/00; H01H31/26; H01H31/28; H01H2300/00; H01H2300/018
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A bypass and isolation switch, comprising: a. a stationary conductor for connection to a source of power, b. a stationary conductor for connection to a load, c. two stationary conductors for connection to a transfer switch, d. movable contact means for connecting or disconnecting said conductor (a) and one of said conductors (c), whereby the transfer switch may be connected to or isolated from the power source, and e. movable contact means for alternatively connecting said conductor (b) to said conductor (a), so as to bypass the transfer switch, or for connecting said conductor (b) to the other of said conductors (c), so as to complete a circuit from the transfer switch to the load.
Claim 2
Dependent Claim
115 words
A bypass and isolation switch, comprising: a. a stationary conductor for connection to a source of power, b. a stationary conductor for connection to a load, c. two stationary conductors for connection to a transfer switch, d. movable contact means for connecting or disconnecting said conductor (a) and one of said conductors (c), whereby the transfer switch may be connected to or isolated from the power source, and e. movable contact means for alternatively connecting said conductor (b) to said conductor (a), so as to bypass the transfer switch, or for connecting said conductor (b) to the other of said conductors (c), so as to complete a circuit from the transfer switch to the load.
Claim 3
Dependent Claim
48 words
A bypass and isolation switch, as defined in claim 1, including means for preventing movement of said contact means (e) which will cause disconnection of said conductors (a) and (b), unless said contact means (d) is positioned to connect said conductor (a) to one of said conductors (c).
Claim 4
Dependent Claim
49 words
A bypass and isolation switch, as defined in claim 1, including means for preventing movement of said contact means (d) for disconnecting said conductor (a) and its respective conductor (c) thereby causing isolation of the transfer switch, unless said contact means (e) is connecting said conductors (a) and (b).
Claim 5
Dependent Claim
64 words
A bypass and isolation switch, as defined in claim 3, wherein said means for preventing movement of said contact means (d) includes a disc having a slot; a first link coupling the disk to contact means (d); and means for engaging the slot to prevent rotation of the disc when contact means (e) is connecting conductors (b) and the other of said conductors (c).
Claim 6
Dependent Claim
43 words
A bypass and isolation switch, as defined in claim 4, wherein said means for engaging the slot include: a second link; means for guiding the second link into the slot; and means for driving the second link, coupled to said contact means (e).
Claim 7
Dependent Claim
48 words
A bypass and isolation switch as defined in claim 5 including means for preventing movement of said contact means (e) which will cause disconnection of said conductors (a) and (b), unless said contact means (d) is positioned to connect said conductor (a) to one of said conductors (c).
Claim 8
Dependent Claim
33 words
A bypass and isolation switch, as defined in claim 6 wherein said means for preventing movement of said contact means (e) includes the disc used for preventing movement of said contact means (d).
Claim 9
Dependent Claim
44 words
A bypass and isolation sWitch, as defined in claim 6, including a starwheel coupled to contact means (e); and means for driving the starwheel into predetermined positions, thereby causing contact means (e) to engage stationary conductor (a) or the other of said conductor (c).
Claim 10
Dependent Claim
145 words
A bypass and isolation switch, comprising: a. a stationary conductor for connection to a source of power, b. a stationary conductor for connection to an auxiliary source of power, c. a stationary conductor for connection to a load d. first and second stationary conductors for connection to a transfer switch, e. a third stationary conductor for connection to a transfer switch, f. movable contact means for connecting or disconnecting conductors (a) and (b) respectively with first and second conductors (d), whereby the transfer switch may be connected to or isolated from the main and auxiliary power sources, and g. movable contact means for connecting said conductor (c) to either said conductor (a) or said conductor (b), so as to bypass the transfer switch, or for connecting said conductor (c) to conductor (e), so as to complete a circuit from the transfer switch to the load.
Claim 11
Dependent Claim
145 words
A bypass and isolation switch, comprising: a. a stationary conductor for connection to a source of power, b. a stationary conductor for connection to an auxiliary source of power, c. a stationary conductor for connection to a load d. first and second stationary conductors for connection to a transfer switch, e. a third stationary conductor for connection to a transfer switch, f. movable contact means for connecting or disconnecting conductors (a) and (b) respectively with first and second conductors (d), whereby the transfer switch may be connected to or isolated from the main and auxiliary power sources, and g. movable contact means for connecting said conductor (c) to either said conductor (a) or said conductor (b), so as to bypass the transfer switch, or for connecting said conductor (c) to conductor (e), so as to complete a circuit from the transfer switch to the load.
Claim 12
Dependent Claim
58 words
A bypass and isolation switch, as defined in claim 9, including means for preventing movement of said contact means (f) for disconnecting conductors (a) and (b) respectively from the first and second conductors thereby causing isolation of the transfer switch, unless said contact means (g) is connecting conductor (c) to either said conductor (a) or said conductor (b).
Claim 13
Dependent Claim
57 words
A bypass and isolation switch, as defined in claim 10, including means for preventing movement of said contact means (g) which will cause disconnection of conductor (c) from either said conductor (a) or said conductor (b) unless said contact means (f) is positioned to connect conductors (a) and (b) respectively to said first and second conductors (d).
References Cited (Backward Citations)
US3274364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |