US 12,327,997 B2
Intrinsically safe circuitry
Peter Galens, Clifton Springs, NY (US); and David J. Trapasso, Bloomfield, NY (US)
Assigned to G.W. Lisk Company, Inc., Clifton Springs, NY (US)
Appl. No. 17/285,267
Filed by G.W. Lisk Company, Inc., Clifton Springs, NY (US)
PCT Filed Dec. 20, 2019, PCT No. PCT/US2019/067847
§ 371(c)(1), (2) Date Apr. 14, 2021,
PCT Pub. No. WO2020/132440, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/783,722, filed on Dec. 21, 2018.
Prior Publication US 2021/0376597 A1, Dec. 2, 2021
Int. Cl. H01H 47/00 (2006.01); H01F 7/18 (2006.01); H01H 47/14 (2006.01); H02H 9/00 (2006.01); H02H 9/02 (2006.01)
CPC H02H 9/008 (2013.01) [H01F 7/18 (2013.01); H02H 9/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A circuit for preventing sparks, the circuit comprising:
a power storage component having a first power storage end and a second power storage end;
a power source electrically connected to the power storage component, the power source having a first power source end having a positive polarity and a second power source end having a negative polarity;
a first current directional component electrically connected to the power storage component and having a first current direction;
a first power absorption component electrically connected to the power storage component and having a current direction, the first current directional component and the first power absorption component being electrically connected to the power storage component in parallel, the first current directional component electrically connected in series with the first power absorption component, wherein the current direction is opposite the first current direction, the first power absorption component operable to allow a flow of current in the current direction and prevent a flow of current in the first current direction;
a second current directional component electrically connected to the power storage component and having a second current direction, the second current direction of the second current directional component corresponding to the first current direction of the first current directional component, the second current directional component and the first current directional component being electrically connected to the power storage component in parallel, the second current directional component being electrically connected to the first current directional component in parallel, the second current directional component being electrically connected to the first power absorption component in parallel;
a third current directional component having a third current direction, the third current directional component electrically connected to the second power source 2/8end, the third current directional component electrically connected to the second current directional component in series, the third current directional component prevents the flow of current from the second power source end to the second current directional component, wherein the third current directional component being connected to the first current directional component in parallel, wherein the third current directional component being connected to the first power absorption component in parallel, wherein the third current direction is opposite the second current direction; and
a first switch electrically connected to the power storage component, the first switch electrically connected in series between the first power source end and the first current directional component, the first switch electrically connected in series between the first current directional component and the second directional component; and
a second switch electrically connected to the power storage component in series, the second switch electrically connected to the second power storage end, the first switch and the second switch being in series with the power storage component and the first power absorption component, the second switch electrically connected in series between the power absorption component and the second current directional component.