1
A new or improved cooking device for foodstuffs. Achille Frederic Boitel, July 4, 1933: GB394980-A (4 worldwide citation)

394,980. Cooking-apparatus. BOITEL, A. F., 168, Kaiserallee, Wilmersdorf, Berlin. Jan. 4, 1932, No. 216. [Class 28 (i).] A portable cooking-vessel is provided with a removable cover which embodies in its structure a ray-emitting device and a colour filter or filters to control the passage of the ray ...


2
Improvements in or relating to light valves. Achille Frederic Boitel, May 28, 1936: GB447962-A

447,962. Optical sound - recording apparatus. BOITEL, A. F., 26, Boulevard de Cambrai, Nizza, France. Nov. 22, 1935, No. 32474. Convention date, Nov. 24, 1934. [Class 40 (ii)] In a light-valve for use in sound recording in which a vibrating wire 11 carrying sound modulated current is disposed betwee ...


3
Improvements in or relating to electric gramophone motors. Royal Motor, Achille Frederic Boitel, September 2, 1932: GB379706-A

379,706. Plug-boards. ROYAL MOTOR AKT.-GES., 74, Freiestrasse, Basle, Switzerland, and BOITEL, A. F., 168, Kaiserallee, Wilmersdorf, Berlin. June 2, 1931, No. 16117. [Class 38 (v).] A gramophone motor for direct or alternating current has the field system located beneath the armature. The field coil ...


4
Improvements in radial cylinder internal combustion engines. Achille Frederic Boitel, December 21, 1936: GB458483-A

458,483. Valves ; cooling ; lubricating. BOITEL, A. F., 26, Boulevard de Cambrai, Nice, France. June 28, 1935, No. 18521. Convention date, June 28, 1935. fClassea 7 (ii) and 7 (vi)] In radial-cylinder engines controlled by an annular valve 2 surrounding the cylinder heads and having a spherical bear ...


5
Improvements in or relating to electric gramophone motors. Royal Motor, Achille Frederic Boitel, September 1, 1933: GB397877-A

397,877. Alternating-current motors. ROYAL MOTOR AKT.-GES., 74, Freiestrasse, Basle, Switzerland, and BOITEL, A. F., 168, Kaiserallee, Wilmersdorf, Berlin. March 1, 1932, No. 16116. [Class 35.] Motors with unwound armatures ; motors, controlling.-A synchronous gramophone motor comprises a stator hav ...