Image:GeophoneDisassembled.jpg

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GeophoneDisassembled.jpg‎ (41KB, MIME type: image/jpeg)

Disassembled "Mark Products" L15B 4.5 Hz geophone. The internal 3 inertial acclerometers are clearly visible. From the book "Grundlagen und Selbstbau geophysikalischer Meßinstrumente" by Bernd Ulmann

Date: Sat, 10 Sep 2005 09:56:48 +0200 (MET_DST) From: ulmann@vaxman.de To: RGVANDEWALKER@yahoo.com Subject: Re: Wikipedia use of your lovely geophone photo...


Hello -

thank you very much for your inquiry. In fact I am the copyright holder of all of the pictures on my pages at www.vaxman.de and you are free to use whatever picture for Wikipedia you would like to. I will support Wikipedia wherever I can and granting the right to use the photos and the photo of the three axis geophone in special is the least I can do. (By the way - this photo and the photos of the Lehman seismometer and the amplifiers, AD converters, etc. all appear in my book.)

By the way, the geophone is a "Mark Products" device, its designation is L15B and it has a natural frequency of 4.5 Hz. Unfortunately I do not know the year when the device was made but at least one may still buy very similar devices so the design and shape has not changed noticeably during time. :-)

I wish you all the best - sincerely,

Bernd. :-)

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  • (del) (cur) 20:19, 13 September 2005 . . Ray Van De Walker (Talk | contribs) . . 640×480 (41,243 bytes) (Disassembled "Mark Products" L15B 4.5 Hz geophone. The internal 3 inertial acclerometers are clearly visible. From the book "Grundlagen und Selbstbau geophysikalischer Meßinstrumente" by Bernd Ulmann Date: Sat, 10 Sep 2005 09:56:48 +0200 (MET_DST) Fr)

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