Ginn Patent Info.

I thought I'd pass this along to whomever may be interested --


Improvements in and relating to gramophones and like sound reproducing instruments
Publication number: GB357578
Publication date: 1931-09-21
Inventor:
Applicant: ELLIS MICHAEL GINN; DAVID PHILLIPS
Classification:
- international: G11B3/00; G11B3/00;
- European: G11B3/00
Application number: GB19300018771 19300619
Priority number(s): GB19300018771 19300619



Abstract of GB357578

357,578. Gramophones. GINN, E. M., and PHILLIPS, D., Ingerthorpe, Great North Road, Highgate. June 19, 1930, No. 18771. [Class 40 (ii).] A gramophone of the external horn type has a sound conduit b<2>, b, b<1> leading down from the tonearm bearing in the motorboard, passing through a side of the cabinet at a point remote from the tonearm bearing, and then extending upwardly to an outlet above the level of the motorboard. In the construction shown, the tone-arm bearing (shown separately in Fig. 4) is located near a front corner of the motor-board, and the conduit, which is made in sections joined together, passes through the rear wall a at an inclination thereto. The horn proper (not shown) preferably has a pivotal connection to the sound conduit, and may extend over the top of the instrument. Preferablv the sound conduit and horn are of exponential form, and the tone-arm b<3> is of the goose-neck type, having the goose-neck c screw-threaded into the T-piece of the tone-arm. --



Complete text available as an imbedded PDF file at -- http://v3.espacenet.com/textdoc?DB=EPOD ... 357578&F=0

-------------------------------------------------------
Also see -- http://ep.espacenet.com/advancedSearch?locale=en_EP

Thanks again, JoeDS!

Just what I was looking for!

As you know, I've long admired the Expert machines and this patent is for the Expert Senior. Interestingly, these 1930 patents were Ginn's first since leaving EMG and paved the way for the development of the Expert range of products.

Percy Wilson (Technical Editor of The Gramophone magazine's "Expert Committee") had imparted some new thoughts on how the EMG Mark 10 could be improved just prior to Ginn and Philips' departure. The big question for me looking at this set of patents is, how much of the Expert is really Wilson's idea for "improving the EMG Mark 10" and how much is "new ideas" with Ginn having to nearly start afresh.

Wilson certainly seemed humbled when he was called upon to review the new Expert machine in December 1930, as Ginn had evidently listened closely to Wilson's solutions for improving the EMG machines. But which part of this set-up is Wilson and which part Ginn?

Will we ever know?

*incidentally is your posting entirely coincidental or have you been looking at my pictures of the Expert Senior on the "other" message board? The sound conduit drawn above is shown in photographs on there. Should I post them here as well?*

*incidentally is your posting entirely coincidental or have you been looking at my pictures of the Expert Senior on the "other" message board? The sound conduit drawn above is shown in photographs on there. Should I post them here as well?*

Hi Steve:

Yes, I did read the post string at OTVMMB. Most interesting. Feel free to refer to this post, or copy it onto the existing string at that site.

The European patent search site -- http://ep.espacenet.com/advancedSearch?locale=en_EP -- is somewhat hard to use compared to Google's patent search site-- http://www.google.com/patents --which does not include European patents at this time. A major flaw in the European Patent site is that it does not allow one to search for key words within a specified date range, as Google's does.

In any event, if I can spot anything about the sound boxes or other information, I'll post them here.