PATENT SPECIFICATION No. 323442.

APPLICATION DATE: May 4, 1929.

SPECIFICATION ACCEPTED: January 2 1930

TITLE: IMPROVEMENTS IN CLOCKWORK RECORDING APPARATUS FOR PIGEON COMPETITION FLIGHTS AND THE LIKE

APPLICANT: HENRY MARTENS of 121 Rue de Flandre, Brussels, Belgium..

Size: 195mmx270mm.

No. of pages of text: 2. 

No. of pages of drawings: 1. Size of page of drawing/s: 140mmx225mm. 

Brief Description of Patent: My invention has for its object a very simple device comprising an auxiliary balance which automatically detects any fraud without it being necessary to put the device in the right starting position or put it back to zero each tome.

Condition: Slight crinkling. Pages loose. Wear to left hand edge where patent has been removed from the volume. 

This was sold by a Library and has their stamp impression on some of the pages/drawings. Multiple Item Postage: Patents can be combined for postage costs, the cost is the same whether you purchase one or several, so check out our Ebay Shop patent listings as well. This patent specification has been disbound from a volume of 100 different patents. This is an original HMSO published item at the time, not a modern copy as are being sold elsewhere. The drawings are often ideal for framing. It is part of a collection of several volumes from the 1893-1900,1907 & 1920/50's that I have from which individual patents will be sold over the next few years.