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New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Mon May 16, 2016 7:23 am
by 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
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Mon May 16, 2016 8:45 am
by alang
That is great information. Thanks for sharing.
Andreas
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Mon May 16, 2016 8:56 am
by rgordon939
Thank you for sharing this great information. Just placed my order.
Rich Gordon
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Mon May 16, 2016 10:57 am
by Victrolacollector
Will these work in the 2 minute recorders for the Home and Standard?
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Mon May 16, 2016 1:26 pm
by 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.
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Thu May 19, 2016 8:45 pm
by Phonoboy
edisonphonoworks wrote: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
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Fri May 20, 2016 11:38 am
by martinola
Phonoboy wrote: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
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Fri May 20, 2016 12:35 pm
by rgordon939
I think the word your trying to think of is SHOE.
Rich Gordon
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Fri May 20, 2016 2:20 pm
by Chuck
I have seen it called a crosshead, and also an eyelet.
Re: New Glass Diaphragms (origin of Edison Diaphragms)
Posted: Fri May 20, 2016 2:41 pm
by 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