QUARTZ CRYSTAL UNIT, QUARTZ CRYSTAL OSCILLATOR AND ELECTRONIC APPARATUS
In a quartz crystal unit, the unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arm...
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| creator | KAWASHIMA, Hirofumi |
| description | In a quartz crystal unit, the unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case. |
| format | Patent |
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portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case.</description><language>eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; ELECTRICITY ; GENERATION OF NOISE BY SUCH CIRCUITS ; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER ; GYROSCOPIC INSTRUMENTS ; HOROLOGY ; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS ; MEASURING ; MEASURING DISTANCES, LEVELS OR BEARINGS ; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL ; MECHANICALLY-DRIVEN CLOCKS OR WATCHES ; NAVIGATION ; PHOTOGRAMMETRY OR VIDEOGRAMMETRY ; PHYSICS ; RESONATORS ; SURVEYING ; TESTING ; TIME PIECES USING THE POSITION OF THE SUN, MOON OR 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WHICH OPERATE IN ANON-SWITCHING MANNER</subject><subject>GYROSCOPIC INSTRUMENTS</subject><subject>HOROLOGY</subject><subject>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</subject><subject>MEASURING</subject><subject>MEASURING DISTANCES, LEVELS OR BEARINGS</subject><subject>MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL</subject><subject>MECHANICALLY-DRIVEN CLOCKS OR WATCHES</subject><subject>NAVIGATION</subject><subject>PHOTOGRAMMETRY OR VIDEOGRAMMETRY</subject><subject>PHYSICS</subject><subject>RESONATORS</subject><subject>SURVEYING</subject><subject>TESTING</subject><subject>TIME PIECES USING THE POSITION OF THE SUN, MOON OR 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DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER</topic><topic>GYROSCOPIC INSTRUMENTS</topic><topic>HOROLOGY</topic><topic>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</topic><topic>MEASURING</topic><topic>MEASURING DISTANCES, LEVELS OR BEARINGS</topic><topic>MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL</topic><topic>MECHANICALLY-DRIVEN CLOCKS OR WATCHES</topic><topic>NAVIGATION</topic><topic>PHOTOGRAMMETRY OR VIDEOGRAMMETRY</topic><topic>PHYSICS</topic><topic>RESONATORS</topic><topic>SURVEYING</topic><topic>TESTING</topic><topic>TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS</topic><toplevel>online_resources</toplevel><creatorcontrib>KAWASHIMA, Hirofumi</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KAWASHIMA, Hirofumi</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>QUARTZ CRYSTAL UNIT, QUARTZ CRYSTAL OSCILLATOR AND ELECTRONIC APPARATUS</title><date>2019-07-18</date><risdate>2019</risdate><abstract>In a quartz crystal unit, the unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER GYROSCOPIC INSTRUMENTS HOROLOGY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL MECHANICALLY-DRIVEN CLOCKS OR WATCHES NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RESONATORS SURVEYING TESTING TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS |
| title | QUARTZ CRYSTAL UNIT, QUARTZ CRYSTAL OSCILLATOR AND ELECTRONIC APPARATUS |
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