US4734817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic clutch
Assignee: Zurn LLC
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Filing: 1986-08-28
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Granted: 1988-03-29
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Expires: 2006-08-28
Abstract
Abstract A device is provided that begins an electrical starting mode in a parallel circuit configuration providing an improved speed of response and after an interval of time, current is switched to a series circuit configuration for operation during a run mode. The device is initially energized at several times the power normally required to activate a coil and switching means is thereafter utilized to reduce power to a normal requirement soon after the coil is energized. Specific hardware is provided in the form of schematic diagrams for defining the operation of the invention.
Inventors
- 👤 William A. Baker
- 👤 Richard Shemanske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:39
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/02; H01H47/04; H01H47/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
256 words
Electronic switching means for controlling the operation of an electromagnetic apparatus having first and second coil winding means, said switching means at times connecting said first and said second coil winding means in parallel and at other times in series, whereby said first and said second coil winding means are initially energized at a maximum ampere turns start mode when connected in parallel and said first and said second coil winding means are thereafter energized to a minimum ampere turns run mode when connected in series comprising a power source providing energy to said first and said second coil winding means, first contact means disposed between said first and said second coil winding means at first sides thereof, second contact means disposed between said first and said second coil winding means at second sides thereof, third contact means disposed between said first and said second coil winding means interconnecting a first side of one of said coil winding means with a second side of the other of said coil winding means, whereby when said first and said second contact means are activated to an on position, said third contact means remains in an off position and said first and said second coil winding means are connected in parallel for initial start mode operation, and whereby when said first and said second contact means are switched to an off position, said third contact means is activated to an on position and said first and said second coil winding means are connected in series for run mode operation.
Claim 2
Dependent Claim
256 words
Electronic switching means for controlling the operation of an electromagnetic apparatus having first and second coil winding means, said switching means at times connecting said first and said second coil winding means in parallel and at other times in series, whereby said first and said second coil winding means are initially energized at a maximum ampere turns start mode when connected in parallel and said first and said second coil winding means are thereafter energized to a minimum ampere turns run mode when connected in series comprising a power source providing energy to said first and said second coil winding means, first contact means disposed between said first and said second coil winding means at first sides thereof, second contact means disposed between said first and said second coil winding means at second sides thereof, third contact means disposed between said first and said second coil winding means interconnecting a first side of one of said coil winding means with a second side of the other of said coil winding means, whereby when said first and said second contact means are activated to an on position, said third contact means remains in an off position and said first and said second coil winding means are connected in parallel for initial start mode operation, and whereby when said first and said second contact means are switched to an off position, said third contact means is activated to an on position and said first and said second coil winding means are connected in series for run mode operation.
Claim 3
Dependent Claim
24 words
Switching means as claimed in claim 1 wherein each of said contact means is opened and closed by DC operated solid state switching means.
Claim 4
Dependent Claim
24 words
Switching means as claimed in claim 1 wherein each of said contact means is opened and closed by AC operated solid state switching means.
Claim 5
Dependent Claim
17 words
Switching means as claimed in claim 2 wherein said DC operated solid state switching means are Mosfets.
Claim 6
Dependent Claim
17 words
Switching means as claimed in claim 3 wherein said AC operated solid state switching means are TRIACS.
Claim 7
Dependent Claim
35 words
Switching means as claimed in claim 2 comprising opto-coupler means for transmitting power to a first and a second solid state switching means and for simultaneously withhoplding power from a third solid state switching means.
Claim 8
Dependent Claim
20 words
Swithcing means as claimed in claim 6 comprising timing means for controlling said opto-coupler means between on and off positions.
Claim 9
Dependent Claim
41 words
Swithcing means as claimed in claim 7 wherein said input voltage to said timing means reaches a threshold value and thereafter drops to substantially zero turning off said opto-coupler means permitting power to flow to said third solid state switching means.
Claim 10
Dependent Claim
266 words
Electronic switching means for controlling the operation of an electromagnetic apparatus having first and second coil winding means, said switching means at times connecting said first and said second coil winding means in parallel and at other times in series, whereby said first and said second coil winding means are initially energized at a maximum ampere turns start mode when connected in parallel and said first and said second coil winding means are thereafter energized to a minimum ampere turns run mode when connected in series, comprising a power source providing energy to said first and said second coil winding means, first solid state switching means between said first and said second coil winding means at first sides thereof, second solid state switching means disposed between said first and said second coil winding means at second sides thereof, third solid state switching means disposed between said first and said second coil winding means interconnecting a second side of said first coil winding means with a first side of said second coil winding means, whereby when said first and said second solid state switching means are activated to an on position, said third solid state switching means remains in an off position and said first and said second coil winding means are connected in parallel for initial start mode operation, and whereby when said first and said second solid state switching means are switched to an off position, said third solid state switching means is activated to an on position and said first and said second coil winding means are connected in series for run mode operation.
Claim 11
Dependent Claim
266 words
Electronic switching means for controlling the operation of an electromagnetic apparatus having first and second coil winding means, said switching means at times connecting said first and said second coil winding means in parallel and at other times in series, whereby said first and said second coil winding means are initially energized at a maximum ampere turns start mode when connected in parallel and said first and said second coil winding means are thereafter energized to a minimum ampere turns run mode when connected in series, comprising a power source providing energy to said first and said second coil winding means, first solid state switching means between said first and said second coil winding means at first sides thereof, second solid state switching means disposed between said first and said second coil winding means at second sides thereof, third solid state switching means disposed between said first and said second coil winding means interconnecting a second side of said first coil winding means with a first side of said second coil winding means, whereby when said first and said second solid state switching means are activated to an on position, said third solid state switching means remains in an off position and said first and said second coil winding means are connected in parallel for initial start mode operation, and whereby when said first and said second solid state switching means are switched to an off position, said third solid state switching means is activated to an on position and said first and said second coil winding means are connected in series for run mode operation.
Claim 12
Dependent Claim
20 words
Switching means as claimed in claim 9 wherein each of said solid state switching means comprises a DC operated device.
Claim 13
Dependent Claim
20 words
Switching means as claimed in claim 9 wherein each of said solid state switching means comprises an AC operated device.
Claim 14
Dependent Claim
13 words
Switching means as claimed in claim 10 wherein DC operated devices are Mosfets.
Claim 15
Dependent Claim
14 words
Switching means as claimed in claim 11 wherein said AC operated devices are TRIACS.
Claim 16
Dependent Claim
35 words
Switching means as claimed in claim 9 comprising opto-coupler means for transmitting power to said first and said second solid state switching means and for simultaneously withholding power from said third solid state switching means.
Claim 17
Dependent Claim
18 words
Switching means as claimed in claim 14 comprising timing means for controlling input voltage to said opto-coupler means.
Claim 18
Dependent Claim
41 words
Switching means as claimed in claim 15 wherein said input voltage to said timing means reaches a threshold value and thereafter drops to substantially zero turning off said opto-coupler means permitting power to flow to said third solid state switching means.
Claim 19
Dependent Claim
71 words
Switching means as claimed in claim 9 wherein said first and said second solid state switching means when in an on position provide a natural bias to prevent said third solid state switching means from being in an on position, and said first and said second solid state switching means when in an off position causing a forward bias to place said third solid state switching means in an on position.
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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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |