I offer a collection of more than 200 (!) patents of the wellknown firm Thornton-Pickard Manufacturing Company or of Mr. Thornton and/or Pickard (Great Britain), published between 1895 and 1935 in Great Britain (all in english). They are busy with photographic cameras, shutters, cinematograph apparatus, photographic lantern enlarging apparatus, apparatus for printing kinematograph films, multi-color screens for photographic films and plates and some other things around photographic items.
All patents are complete, that means contain the full text and all drawings (see example). You will get a professional overview about the technical developments of this company which you find nowhere in the world in this good quality / completeness. You can learn a lot about the technical details of old camera / photographic technique.