Abstract: A double tuning fork type force transducer comprising two identical parallel branches fastened at their ends to two coupling members adapted to vibrate in bending mode and in phase opposition in response to imposed vibrational loads with an intrinsic frequency representative of the amplitude of a force F applied longitudinally to the coupling members is laminated; it comprises two identical metal leaf springs of constant thickness forming said branches and comprising ends of larger width than said branches and held apart by two metal spacers both having the same thickness, these spacers and these ends being fastened within said coupling members and having substantially the same external profile.

Abstract: A force sensing device comprises a parallelepipedic block, the height of which is larger than its width, and which is provided with an opening in the direction of its width so as to form a parallelogram made deformable by the presence of thinner zones in the direction of its height; flexural deformation sensitive elements are fixed to a substantially horizontal section of the block opposite two of the thinner zones which are of a higher flexibility than the other thinner zones. This allows significantly easier manufacturing of low costs while combining high accuracy of measurement and low sensitivity to eccentric loads.