Patents by Inventor Tak Wah Shum
Tak Wah Shum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11086199Abstract: In an electrically-operated zooming strobe device of a lens moving type, to prevent damage to the zooming drive device even if an external force acts on the lens holder in the front-rear direction, a lens holder (26) having a lens (68) on a front side thereof is mounted on a strobe main body 24 having light emitting part (36) such that the lens holder is movable in the front-rear direction, and the strobe main body (24) is provided with a zooming drive device (47) including a movable member (44) driven by an electric motor (48) in the front-rear direction, wherein the movable member (44) and the lens holder (26) are connected to each other by a magnetic force of magnet pieces (62, 78) attached to the movable member (44) and the lens holder (26).Type: GrantFiled: June 19, 2017Date of Patent: August 10, 2021Assignees: Nissin Industries Ltd.Inventor: Tak Wah Shum
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Publication number: 20210181599Abstract: In an electrically-operated zooming strobe device of a lens moving type, to prevent damage to the zooming drive device even if an external force acts on the lens holder in the front-rear direction, a lens holder (26) having a lens (68) on a front side thereof is mounted on a strobe main body 24 having light emitting part (36) such that the lens holder is movable in the front-rear direction, and the strobe main body (24) is provided with a zooming drive device (47) including a movable member (44) driven by an electric motor (48) in the front-rear direction, wherein the movable member (44) and the lens holder (26) are connected to each other by a magnetic force of magnet pieces (62, 78) attached to the movable member (44) and the lens holder (26).Type: ApplicationFiled: June 19, 2017Publication date: June 17, 2021Inventor: Tak Wah Shum
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Publication number: 20200267809Abstract: A strobe device includes: a battery case configured to hold a plurality of batteries; a main capacitor charged by the batteries; a flash discharge tube to which a voltage is applied by the main capacitor; a voltage detecting unit configured to detect a voltage of each of the batteries, respectively; and a charging control unit configured to control charging of the main capacitor such that the main capacitor is charged with a first electric current that is suitable for lithium batteries in a case where a total voltage of the batteries detected by the voltage detecting unit is more than a prescribed first value, and control charging of the main capacitor such that the main capacitor is charged with a second electric current that is greater than the first electric current in a case where the total voltage is equal to or less than the first value.Type: ApplicationFiled: February 14, 2020Publication date: August 20, 2020Inventor: Tak Wah Shum
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Patent number: 10728965Abstract: A strobe device includes: a battery case configured to hold a plurality of batteries; a main capacitor charged by the batteries; a flash discharge tube to which a voltage is applied by the main capacitor; a voltage detecting unit configured to detect a voltage of each of the batteries, respectively; and a charging control unit configured to control charging of the main capacitor such that the main capacitor is charged with a first electric current that is suitable for lithium batteries in a case where a total voltage of the batteries detected by the voltage detecting unit is more than a prescribed first value, and control charging of the main capacitor such that the main capacitor is charged with a second electric current that is greater than the first electric current in a case where the total voltage is equal to or less than the first value.Type: GrantFiled: February 14, 2020Date of Patent: July 28, 2020Assignee: NISSIN INDUSTRIES LTD.Inventor: Tak Wah Shum
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Patent number: 9004704Abstract: An electronic flash device which is protected from thermally damaging a lamp holder (30) supporting a flash tube (40) even when the flash tube is lighted in a consecutive manner for a prolonged period of time. The lamp holder is made of ceramic material. The flash tube is supported by the lamp holder via a tube mounting member (44) which includes a wavy central part (44A) extending laterally along a back side of the lamp holder and a pair of annular parts (44B) fitted on either axial end of the flash tube such that the flash tube is resiliently urged against a bottom part of a concave mirror (42) received in the lamp holder.Type: GrantFiled: September 25, 2013Date of Patent: April 14, 2015Assignee: Nissin Industries Ltd.Inventors: Tak Wah Shum, Han Wu He
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Publication number: 20150084536Abstract: In an electronic flash device using a discharge flash tube (10) including a pair of discharge electrodes (14, 16) and a trigger electrode (18), an improvement is made to eliminate failures to emit flash light following a consecutive emitting of weak flash lights which is known to occur particularly when barium is used as the material for electron emission in the cathode (16) of the flash tube. A timing of applying the trigger voltage to the trigger electrode is delayed in relation to a timing of applying the discharge voltage to the discharge electrodes.Type: ApplicationFiled: September 25, 2013Publication date: March 26, 2015Inventor: Tak Wah SHUM
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Publication number: 20150085463Abstract: An electronic flash device which is protected from thermally damaging a lamp holder (30) supporting a flash tube (40) even when the flash tube is lighted in a consecutive manner for a prolonged period of time. The lamp holder is made of ceramic material. The flash tube is supported by the lamp holder via a tube mounting member (44) which includes a wavy central part (44A) extending laterally along a back side of the lamp holder and a pair of annular parts (44B) fitted on either axial end of the flash tube such that the flash tube is resiliently urged against a bottom part of a concave mirror (42) received in the lamp holder.Type: ApplicationFiled: September 25, 2013Publication date: March 26, 2015Applicant: Nissin Industries Ltd.Inventors: Tak Wah SHUM, Han Wu HE
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Patent number: 8905599Abstract: In a strobe zoom device of an electrically driven feed screw type, to reduce the sound pressure level of zoom operation sound caused by an electrically driven feed screw and to allow strobe imaging to be performed quietly, the electrically driven feed screw for strobe zoom includes: a feed screw rod (30) having a central axis and mounted to a casing (10) so as to be rotatable about the central axis thereof and extend in the fore and aft direction, the feed screw rod including an outer circumferential surface having a screw groove (32) formed thereon; and a wire member (34) attached to a movable body (planar lens plate (12) or a light source box (20)) and including a part wrapped around at least a part of the screw groove (32) so as to be in threaded engagement with the same.Type: GrantFiled: June 16, 2011Date of Patent: December 9, 2014Assignees: Nissin Industries Ltd., Chikara GOTOInventor: Tak Wah Shum
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Publication number: 20140104809Abstract: An electronic flash device is properly protected from thermal damages without requiring an expensive heat resistant temperature sensor to be mounted on a flash tube thereof. A heat generation accumulated value is incremented by each activation of the flash unit and decremented by elapsing of each unit time. An activation of the flash unit is permitted when the heat generation accumulated value is no more than a prescribed value and is prohibited when the heat generation accumulated value is more than the prescribed value.Type: ApplicationFiled: October 10, 2013Publication date: April 17, 2014Applicant: Nissin Industries Ltd.Inventor: Tak Wah SHUM
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Publication number: 20130163257Abstract: In a strobe zoom device of an electrically driven feed screw type, to reduce the sound pressure level of zoom operation sound caused by an electrically driven feed screw and to allow strobe imaging to be performed quietly, the electrically driven feed screw for strobe zoom includes: a feed screw rod (30) having a central axis and mounted to a casing (10) so as to be rotatable about the central axis thereof and extend in the fore and aft direction, the feed screw rod including an outer circumferential surface having a screw groove (32) formed thereon; and a wire member (34) attached to a movable body (planar lens plate (12) or a light source box (20)) and including a part wrapped around at least a part of the screw groove (32) so as to be in threaded engagement with the same.Type: ApplicationFiled: June 16, 2011Publication date: June 27, 2013Applicants: NISSIN INDUSTRIES LTD.Inventor: Tak Wah Shum