US3896353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosed high voltage motor control with interlocking elements
Assignee: Allen Bradley Co LLC
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Filing: 1974-01-14
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Granted: 1975-07-22
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Expires: 1994-01-14
Abstract
Abstract A high voltage motor control enclosure includes three compartments into which electromagnetically actuated contactors are inserted. Each contactor is mounted to a carriage which slides into the enclosure and connects with a set of fuses mounted in an assembly on the back wall. Disconnect switches are mounted above the fuse assembly and connects the fuses with a source of high voltage located on the back of the enclosure. The disconnect switches are linked to the enclosure door handle by an interlock mechanism which opens the disconnect before the enclosure can be entered. The interlock mechanism is also coupled through a locking mechanism to the contactor to prevent the disconnect switches from being opened when the contactor is energized. A bi-directional motor control is described in which two contactors are coupled through the locking mechanism to the interlock.
Inventors
- 👤 Lawrence A Burton
- 👤 Gustav W Doos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:32
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133; H02B1/00; H02B1/26; H02B1/30; H02B1/32; H02B1/34; H02B1/36; H02B11/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
262 words
In a high voltage motor control the combination comprising an enclosure having a door and a handle which is operable between a locked and unlocked position to allow entry into the enclosure through the door; a plurality of current conducting paths contained within said enclosure conducting load current between a set of high voltage terminals on the back of said enclosure and a set of load lines; guide means mounted to the enclosure floor; a carriage which is slidably received by said guide means and retained thereby in an operating position, said carriage including a contactor which is electrically connected into said current conducting paths when said carriage is in said operating position, said contactor being operable to conduct load current when energized and to interrupt conduction of load current when deenergized; a fuse assembly mounted to the back wall of said enclosure and including a set of fuses which are electrically connected inTo said current conducting paths; a disconnect assembly mounted to the back wall of said enclosure above said fuse assembly and including a set of disconnect switches which are electrically connected into said current conducting paths and which are operable between a closed position in which they conduct load current from said high voltage terminals on the back of said enclosure and an open position in which they isolate the high voltage terminals from the interior of the enclosure; and an interlock mechanism which connects said disconnect assembly to said handle and which is operable to open said disconnect switches when said handle is operated to unlock said door.
Claim 2
Dependent Claim
262 words
In a high voltage motor control the combination comprising an enclosure having a door and a handle which is operable between a locked and unlocked position to allow entry into the enclosure through the door; a plurality of current conducting paths contained within said enclosure conducting load current between a set of high voltage terminals on the back of said enclosure and a set of load lines; guide means mounted to the enclosure floor; a carriage which is slidably received by said guide means and retained thereby in an operating position, said carriage including a contactor which is electrically connected into said current conducting paths when said carriage is in said operating position, said contactor being operable to conduct load current when energized and to interrupt conduction of load current when deenergized; a fuse assembly mounted to the back wall of said enclosure and including a set of fuses which are electrically connected inTo said current conducting paths; a disconnect assembly mounted to the back wall of said enclosure above said fuse assembly and including a set of disconnect switches which are electrically connected into said current conducting paths and which are operable between a closed position in which they conduct load current from said high voltage terminals on the back of said enclosure and an open position in which they isolate the high voltage terminals from the interior of the enclosure; and an interlock mechanism which connects said disconnect assembly to said handle and which is operable to open said disconnect switches when said handle is operated to unlock said door.
Claim 3
Dependent Claim
135 words
The high voltage motor control as recited in claim 1 in which said disconnect assembly includes an insulating shield interposed between said high voltage terminals and the interior of said enclosure, said insulating shield having a set of windows, one associated with each of said disconnect switches, and wherein each disconnect switch includes a movable contact disposed on one side of said insulating shield within said enclosure and a stationary contact disposed on the other side of said insulating shield and electrically connected to said high voltage terminals, each of said movable contacts being coupled to said interlock mechanism for operation between said closed position in which they extend through the windows in said insulating shield to electrically contact their associated stationary contact and said open position in which they are withdrawn into said enclosure.
Claim 4
Dependent Claim
80 words
The high voltage motor control as recited in claim 2 in which said disconnect assembly includes a slidably mounted shutter having openings which align with the windows in said insulating shield when in a closed position, said shutter being coupled to said interlock mechanism by a shutter mechanism which slides said shutter to an open position in which it covers said windows to isolate said high voltage terminals from the interior of said enclosure when said disconnect switches are opened.
Claim 5
Dependent Claim
40 words
The high voltage motor control as recited in claim 3 in which said disconnect switch movable contacts and said shutter mechanism are coupled to said interlock mechanism by a common drive shaft which is rotatably mounted to the disconnect assembly.
Claim 6
Dependent Claim
39 words
The high voltage motor control as recited in claim 1 in which said interlock mechanism is coupled to said contactor by a locking mechanism which is operable to inhibit operation of said interlock mechanism when said contactor is energized.
Claim 7
Dependent Claim
253 words
In a high voltage motor control the combination comprising an enclosure having a door and a handle which is operable between a locked and unlocked position to allow entry into the enclosure through the door; a set of high voltage terminals on the back of said enclosure; a disconnect assembly mounted to the back wall of said enclosure and connected to said high voltage terminals, said disconnect assembly being operable between a closed position in which it conducts high voltage to the interior of said enclosure and an open position in which it isolates said high voltage terminals from the interior of said enclosure; an interlock mechanism mounted to one side of said enclosure and connected with said enclosure handle and said disconnect assembly, said interlock mechanism being operable in response to the position of said handle to close said disconnect assembly when said handle is in its locked position and to open said disconnect assembly when said handle is in its unlocked position; a contactor removably mounted on the floor of said enclosure and electrically connected to said disconnect assembly and receiving high voltage at a set of input terminals, said contactor being operable to conduct said received high voltage to a set of output terminals when in an energized state and being operable to interrupt such conduction when in a deenergized state; and a locking mechanism coupled to said contactor and said interlocK mechanism, said locking mechanism being operable to inhibit operation of said interlock mechanism when said contactor is energized.
Claim 8
Dependent Claim
253 words
In a high voltage motor control the combination comprising an enclosure having a door and a handle which is operable between a locked and unlocked position to allow entry into the enclosure through the door; a set of high voltage terminals on the back of said enclosure; a disconnect assembly mounted to the back wall of said enclosure and connected to said high voltage terminals, said disconnect assembly being operable between a closed position in which it conducts high voltage to the interior of said enclosure and an open position in which it isolates said high voltage terminals from the interior of said enclosure; an interlock mechanism mounted to one side of said enclosure and connected with said enclosure handle and said disconnect assembly, said interlock mechanism being operable in response to the position of said handle to close said disconnect assembly when said handle is in its locked position and to open said disconnect assembly when said handle is in its unlocked position; a contactor removably mounted on the floor of said enclosure and electrically connected to said disconnect assembly and receiving high voltage at a set of input terminals, said contactor being operable to conduct said received high voltage to a set of output terminals when in an energized state and being operable to interrupt such conduction when in a deenergized state; and a locking mechanism coupled to said contactor and said interlocK mechanism, said locking mechanism being operable to inhibit operation of said interlock mechanism when said contactor is energized.
Claim 9
Dependent Claim
62 words
The high voltage control as recited in claim 6 in which said interlock mechanism includes a rotatably mounted pivot arm which is linked to said handle and is rotated when said handle is operated, and said locking mechanism is coupled to said interlock mechanism by a rotatably mounted interlock arm which engages and locks said pivot arm when said contactor is energized.
Claim 10
Dependent Claim
67 words
The high voltage motor control as recited in claim 7 in which said locking mechanism is mounted to the floor of said enclosure alongside said contactor and it includes a forward rotatable operating member which is coupled to the interlock arm by a connecting rod, and in which said contactor includes an operating shaft which rotates when the contactor is energized to rotate said forward operating member.
Claim 11
Dependent Claim
137 words
The high voltage motor control as recited in claim 8 in which a second contactor is mounted in said enclosure and a second locking mechanism is mounted alongside it and coupled to the contactor operating shaft by a forward operating member, said first locking mechanism including a rear operating member which is coupled to the forward operating member of said second locking mechanism by a second connecting rod and to said interlock arm by a third connecting rod, and said second locking mechanism includes a rear operating member which is coupled to the forward operating member of said first locking mechanism by a fourth connecting rod, wherein the operation of said forward and rear operating members on said first and second locking mechanisms are mutually exclusive to prevent both contactors from being energized at the same time.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |