New Glass Diaphragms (origin of Edison Diaphragms)

[edisonphonoworks]

where did Edison come up with the idea for his recording/ reproducing diaphragms (for the regular size reproducers, such as the perfected, standard speaker, automatic, model B (not diamond B),Model C,H,K, what did he base the diameter of the diaphragm on??? Large,round, microscope slide cover slips!!!!!! It even mentions it in the 1889 repair manual for the spectacle recorder/reproducer. The size is 33mm 1.299". Now I have 200 of them in stock, but those are for my work, should be a lifetime supply of glass diaphragms. They vary from .005-.008 in thickness, (most are .007,.0075,.008" thick that I have just checked.)Below is where I got mine and they just arrived, and I checked them. They come in a stack, in plastic and tissue paper, none were broken, all arrived safe, they were made in china, cost twenty and a half cents each with shipping.



http://www.ebay.com/itm/Circular-round- ... D100102%26

[alang]

That is great information. Thanks for sharing.
Andreas

[rgordon939]

Thank you for sharing this great information. Just placed my order.

Rich Gordon

[Victrolacollector]

Will these work in the 2 minute recorders for the Home and Standard?

[Chuck]

Normally those later recorders came with a .002 inch
thick mica diaphragm.

If these glass cover slips will fit ok, then it would be
a good experiment to try one in a later style recorder
to see how it works.

Try it and see.

[Phonoboy]

where did Edison come up with the idea for his recording/ reproducing diaphragms (for the regular size reproducers, such as the perfected, standard speaker, automatic, model B (not diamond B),Model C,H,K, what did he base the diameter of the diaphragm on??? Large,round, microscope slide cover slips!!!!!! It even mentions it in the 1889 repair manual for the spectacle recorder/reproducer. The size is 33mm 1.299". Now I have 200 of them in stock, but those are for my work, should be a lifetime supply of glass diaphragms. They vary from .005-.008 in thickness, (most are .007,.0075,.008" thick that I have just checked.)Below is where I got mine and they just arrived, and I checked them. They come in a stack, in plastic and tissue paper, none were broken, all arrived safe, they were made in china, cost twenty and a half cents each with shipping.
How do you go about piercing the center hole?


http://www.ebay.com/itm/Circular-round- ... D100102%26

[martinola]

How do you go about piercing the center hole?

On the glass diaphragms that I've seen, there's no center hole. The whatchamacallit is glued directly to the center. (Hmph - I used to know what it was called!)

Martin

[rgordon939]

I think the word your trying to think of is SHOE.

Rich Gordon

[Chuck]

I have seen it called a crosshead, and also an eyelet.

[rgordon939]

Chuck I just checked my Edison Spring Motor manual an on the back page it has a breakdown of the reproducer and the name of the part is listed as CROSS--HEAD so you are correct.

Rich Gordon