My 1980's Tangential Tone Arm and my 2010 improvement - diyAudio
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Old 7th December 2010, 09:22 PM   #1
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Default My 1980's Tangential Tone Arm and my 2010 improvement

Hello All,

In the 1980's I designed and built a Tangential Tone Arm. I patented it at the time, but the patent has since expired. I didn't pursue the idea, because CD's came on the market at just about that time. Having recently found out that vinyl is still very much around, I decided earlier in 2010 to improve the Tone arm. I am going to attach some photos, a magazine article and some drawings to explain how it works and then I'll make some comments about the new version of the Tone arm.

Sincerely,

Ralf

The first picture shows the original 1980's prototype.

The next three picture show the tone arm on a Micro-Seiki turntable in the:

A) Rest position,

B) The start of play position,

C) The end of play position

The Magazine Article is from the 4-22-1985 issue of Design News.

And the following three PDF files show how the geometry was developed.
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Old 8th December 2010, 05:07 AM   #2
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Default Pictures

Here are the first three pictures which should have been in my first post. Ididn't realize I could only upload three pictures per post.

Ralf
Attached Images
File Type: jpg ORIGINAL_PROTOTYPE.jpg (631.6 KB, 1926 views)
File Type: jpg TONEARM_AT_REST.jpg (440.1 KB, 1744 views)
File Type: jpg TONEARM_START_OF_PLAY.jpg (448.5 KB, 1656 views)
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Old 8th December 2010, 05:12 AM   #3
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Default More Pictures

Here are three more images.

Ralf
Attached Images
File Type: jpg TONEARM_END_OF_PLAY.jpg (438.3 KB, 1594 views)
File Type: jpg DESIGN_NEWS_4_22_85_PAGE_1.jpg (821.9 KB, 1557 views)
File Type: jpg DESIGN_NEWS_4_22_85_PAGE_2.jpg (928.1 KB, 1020 views)
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Old 8th December 2010, 05:17 AM   #4
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Default More pictures

Three more images.

Ralf
Attached Images
File Type: jpg DESIGN_NEWS_4_22_85_PAGE_3.jpg (975.0 KB, 876 views)
Attached Files
File Type: pdf TONEARM_BASIC GEOMETRY_PAGE_1.pdf (16.7 KB, 279 views)
File Type: pdf TONEARM_BASIC GEOMETRY_PAGE_2.pdf (17.0 KB, 190 views)
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Old 8th December 2010, 05:20 AM   #5
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Default Pictures

And one more image.

Ralf
Attached Files
File Type: pdf TONEARM_BASIC GEOMETRY_PAGE_3.pdf (16.1 KB, 250 views)
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Old 8th December 2010, 05:29 AM   #6
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that is beautiful. !
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Old 8th December 2010, 05:47 AM   #7
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Default My intermediate never to be finished prototype

Hi All,

In the late eighties I made an attempt to improve my tone arm but I couldn't get away from the overhead track upon which the carriage travels. It still looked too cumbersome, mechanically speaking. The attached pictures show the front and back of the tone arm base and track housing unit. The actual tone arm itself was never made. The large brass unit hanging from the track, is a dummy weight representing the tone arm to be. The transparent cover on top allows the reference arm and its associated cams to be viewed. All my tone arms have and will have this reference arm and associated cams in common.

Ralf
Attached Images
File Type: jpg SECOND_PROTOTYP_FRONT.jpg (281.2 KB, 856 views)
File Type: jpg SECOND_PROTOTYPE_REAR.jpg (293.3 KB, 774 views)
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Old 8th December 2010, 05:51 AM   #8
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Default @ neutron7

Thank you neutron7

Ralf
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Old 8th December 2010, 06:00 AM   #9
Shaun is offline Shaun  South Africa
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I think I like it! I'm sure you could still make some money off the idea today, especially considering the form factor.
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Old 8th December 2010, 06:04 AM   #10
Shaun is offline Shaun  South Africa
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Do those last two pictures represent the actual scale of the improved arm (minus wand & headshell)? Amazing! Any chance you can put them side by side?
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