Amplifier beam type transducer

Transducer apparatus of a type which receives an input signal at one end of a beam that is mounted for pivotal movement about a fulcrum positioned between the two ends of the beam and which transmits an output signal at the other end of the beam, comprising:

• housing means forming a beam chamber;
• an elongated rigid beam within said chamber having an input end and an output end;
• a fulcrum positioned within said chamber, providing a support edge in contact with said beam about which said beam pivots;
• adjusting means for moving the fulcrum in said chamber lengthwise along said beam, to in that manner vary the relative lengths of the beam portions on opposite sides of the support edge;
• and
• means within said housing both maintaining said beam on said support edge, for pivotal movement thereabout, and restraining said beam against all other movement, comprising:
• a U-shaped yoke including a pair of elongated side members disposed at opposite sides of the beam and a transverse end member interconnected between corresponding ends of said members, so that the yoke has both a closed end and an open end;
• first pivot means near one end of the yoke, connecting said yoke with said housing for pivotal movement about a first axis which is parallel with the support edge of the fulcrum;
• second pivot means near the opposite end of the yoke, connecting said yoke to said beam for pivotal movement about a second axis which is parallel to both the first axis and the support edge of the fulcrum.

Transducer apparatus of a type which receives an input signal at one end of a beam that is mounted for pivotal movement about a fulcrum positioned between the two ends of the beam and which transmits an output signal at the opposite end of the beam, comprising:

• housing means forming a beam chamber;
• an elongated rigid beam within said chamber having an input end and an output end;
• a fulcrum positioned within said chamber about which said beam pivots;
• said housing comprising spaced apart top and bottom walls, spaced apart end walls and spaced apart side walls, together defining said beam chamber, said housing also inlcuding means defining a first opening in the top wall, opening towards the input end of said beam, and first mounting means surrounding said opening for receiving a load input means, means defining a second opening in said top wall, opening towards the output end of said beam, and second mounting means surrounding said second opening, for receiving a load output means, means defining a third opening in the bottom wall of the housing, generally opposite the first opening, and third mounting means surrounding the third opening for receiving a load input means which coacts with input means positioned in said first mounting means to produce a differential force tending to pivot beam about the support edge of the fulcrum;
• and means defining a fourth opening in the bottom wall of said housing, generally opposite said second opening, and fourth mounting means surrounding the fourth opening, for receiving a bias means adpated to contact the output end of said beam and to provide an adjustable force acting upon the output end of said beam;
• each said mounting means comprising an internally threaded tubular socket, said sockets upstanding from and integrally connected to the top and bottom walls;
• and
• a first strengthening web extending between the tubular sockets upstanding from the top wall, and a second strengthening web extending between the tubular sockets upstanding from the bottom wall, said webs being integrally connected to the sockets at their ends and being integrally connected to the top and bottom walls respectively of the housing along their inboard extents.