Andrew Richard Carlson

US Patent:

20230096110, Mar 30, 2023

Filed:

Sep 29, 2021

Appl. No.:

17/449271

Inventors:

- MAYFIELD HEIGHTS OH, US
Andrew E. Carlson - Oak Creek WI, US
David Elmiger - Hitzkirch, CH

International Classification:

H01H 33/59

Abstract:

A method may include receiving a command to move one or more armatures configured to move between a first position that electrically couples one or more first movable contacts to one or more second contacts and a second position that electrically uncouples the one or more first movable contacts from the one or more second contacts. The method may also include determining an operating frequency of the system, dynamically determining an open-before-zero target point associated with the operating frequency, and transmitting a command to the switching device to move the one or more armatures from the first position to the second position at the open-before-zero target point to normalize the arc energy over the operating frequency range.

US Patent:

20230101428, Mar 30, 2023

Filed:

Sep 27, 2021

Appl. No.:

17/485734

Inventors:

- Mayfield Heights OH, US
Andrew E. Carlson - Franklin WI, US
David M. Messersmith - Kenosha WI, US
David Elmiger - Hitzkirch, CH

International Classification:

H01H 47/00
H01H 50/44
H01H 50/18

Abstract:

A non-transitory, computer-readable medium may include instructions executable by at least one processor in a computing device to cause the processor to perform operations that include transmitting, to a first power source, a command to provide power to a coil of a switching device with a fixed current profile. The operations also include receiving one or more voltage measurements associated with the coil during a period of time, determining whether the voltage measurements associated with the coil indicate that one or more movable contacts of the switching device are at least partially welded to one or more contacts of an electric circuit, and transmitting an additional command to a second power source to disconnect a current to the coil in response to determining that the voltage measurements indicate that the movable contacts of the switching device are at least partially welded to the contacts of the electric circuit.

US Patent:

20230102770, Mar 30, 2023

Filed:

Sep 27, 2021

Appl. No.:

17/485748

Inventors:

- Mayfield Heights OH, US
Andrew E. Carlson - Franklin WI, US
David M. Messersmith - Kenosha WI, US

International Classification:

H01H 47/22
H01H 50/44
H01H 50/36
H01H 47/00

Abstract:

A method may include receiving a command to move one or more armatures of a switching device from a first position that electrically couples a first contact to a second contact to a second position that electrically uncouples the first contact from the second contact. The method may also include selecting a current zero-crossing point along an electric waveform indicative of a change in current through the first contact and the second contact as a synchronization point, determining a predicted current zero-crossing point by adding a period measurement associated with a previously detected current zero-crossing point or a previously detected line-to-line crossing point in the electric waveform to the synchronization point, and transmitting a command to the switching device to move the armatures from the first position to the second position before or at the predicted current zero-crossing point.

US Patent:

20210096185, Apr 1, 2021

Filed:

Sep 30, 2019

Appl. No.:

16/587968

Inventors:

- Mayfield Heights OH, US
Andrew E. Carlson - Franklin WI, US

International Classification:

G01R 31/327
H01H 9/56
H01H 9/16
H01H 47/00
H01H 47/02
H01H 47/22
H02P 1/10
H03K 17/18

Abstract:

A relay device may include an armature that moves between a first position that electrically couples the armature to a first contact and a second position that electrically couples the armature to a second contact. The relay device may also include a relay coil that receives a voltage to magnetize the relay coil, thereby causing the armature to move from the first position to the second position. The relay device may also include a drive circuit that couple the voltage to the relay coil, such that the voltage is higher than a rated voltage associated with the relay coil.

US Patent:

20210099108, Apr 1, 2021

Filed:

Sep 30, 2019

Appl. No.:

16/588068

Inventors:

- Mayfield Heights OH, US
Ahmad K. Omari - Bayside WI, US
Patrick K. Duffy - Milwaukee WI, US
Andrew E. Carlson - Franklin WI, US
Randall S. Langer - Oak Creek WI, US

International Classification:

H02P 1/10
H02K 11/00
H02K 11/33
H01H 47/18
H01H 47/22
H01H 9/56
H01H 50/00

Abstract:

A point-on-wave relay device includes a first contact relay and a second contact relay in series with the first contact relay. A first state of the first contact relay in conjunction with a first state of the second contact relay causes a point-on-wave open operation and second state of the first contact relay in conjunction with a second state of the second contact relay causes a point-on-wave close operation.

US Patent:

20210090469, Mar 25, 2021

Filed:

Sep 16, 2020

Appl. No.:

17/023109

Inventors:

- Mayfield Heights OH, US
Andrew E. Carlson - MILWAUKEE WI, US

International Classification:

G09F 3/00
H01H 71/04
G09F 3/04

Abstract:

An indicator is provided that can couple, without a fastener, to a housing of an industrial device.

US Patent:

20200047247, Feb 13, 2020

Filed:

Aug 8, 2019

Appl. No.:

16/535639

Inventors:

- Sherbrooke, CA
Michael Bouchard - Sherbrooke, CA
Andrew Carlson - Spokane WA, US
Spencer Bishop - Spokane WA, US

Assignee:

Les Produits Industriels De Haute Temperature Pyrotek Inc. - Sherbrooke QC

International Classification:

B22D 43/00
B01D 39/08

Abstract:

A filter for filtering a liquid metal and to be received in a mold housing defined by internal side and face walls. The filter has a top wall and side walls extending downwardly from the top wall, the side walls being joined together at respective corners. The side walls extend downwardly towards distal end portions. The corners of the filter have a stiffness or rigidity that is higher that the remainder of the filter for increasing the strength of the overall filter and for helping the filter to maintain its shape and integrity throughout casting. The shape of the side walls allows an easy and consistent placement of the filter in the mold housing and ensures that the filter is maintained in place.

US Patent:

20190115178, Apr 18, 2019

Filed:

Oct 12, 2017

Appl. No.:

15/782522

Inventors:

- Mayfield Heights OH, US
Andrew Edward Carlson - Franklin WI, US

International Classification:

H01H 51/22
H01H 50/32
H01H 71/68
H01H 73/44

Abstract:

An overload relay is disclosed in which a single operator coil is controlled for both tripping and resetting. A permanent magnet and a spring make the device bi-stable, so the coil may be unpowered when in the trip and reset states. Energization of the coil overcomes the magnet to allow tripping, while energization in an opposite direction adds to the magnet force to reset the device. An electromagnetic activation path overrides a mechanical activation path for electromagnetic tripping despite attempted manual resetting. The device may be pulse width modulated to reduce power consumption