Cantilever support beam assembly for a load cell and the like

• US 4,558,756 A
• Filed: 04/23/1984
• Issued: 12/17/1985
• Est. Priority Date: 04/23/1984
• Status: Expired due to Fees

• Current Assignee: Aniese E. Seed
• Original Assignee: Toledo Transducers, Inc.
• Inventors: Seed, Aniese E.
• Primary Examiner(s): Goldberg, E. A.
• Assistant Examiner(s): Foster, Patrick W.
• Application Number:
  US06/602,670
• Time in Patent Office: 603 Days
• Field of Search: 177/211, 177/229, 73/862.65, 73/862.66
• US Class Current: 177/211
• CPC Class Codes: G01G 3/1412 the supports being parallelogram shaped

Abstract

An improved cantilever support beam assembly for a load cell and the like having a longitudinally extending support beam with two openings extending through the sidewalls of the beam. The openings are independent from one another and separated by a web. Strain gages, are mounted on the concave portions of the openings which are adjacent one another.

Claims

1. A cantilever beam assembly for a load cell comprising a longitudinally extending support beam having opposed sidewalls, two adjacent parallel and independent openings extending completely through the sidewalls of said beam, said beam completely surrounding each of said independent and parallel openings, a vertical web between said two openings and gages located adjacent said vertical web in at least one of said two openings.

2. A cantilever beam assembly for a load cell comprising a longitudinally extending support beam having opposed sidewalls, two adjacent parallel openings extending completely through the sidewalls of said beam, said beam completely surrounding each of said parallel openings, a vertical web between said openings having a minimum thickness less than the largest width of either of said two openings and at least four strain gages located in at least one of said two openings adjacent said minimum thickness of said vertical web.

3. A cantilever beam assembly for a load cell comprising a generally rectangular shaped support beam rigidly attached at one end to a rigid member, said beam having a longitudinal axis and opposed sidewalls, first and second parallel cylindrical holes extending completely through the side walls of said beam, said parallel cylindrical holes being perpendicular to such longitudinal axis of said support beam, said beam completely surrounding each of said parallel cylindrical holes, said first and second cylindrical holes defining a vertical web between said first and second cylindrical holes having a minimum thickness less than the radius of either of said first or second cylindrical holes, a pair of vertically aligned strain gages located on the interior portions of each of said first and second cylindrical holes adjacent said minimum thickness of said web for measuring strains in said load cell.

4. A cantilever beam assembly for a load cell according to claim 3, wherein said beam has opposed top and bottom surfaces with concave recesses in said surfaces located above and below said first and second cylindrical holes.

5. A cantilever beam assembly for a load sell comprising a cylindrical support beam rigidly attached at one end to a rigid member, said beam having a side area of reduced cross-section, first and second parallel cylindrical holes extending completely through said area of reduced cross-section, said beam completely surrounding each of said parallel cylindrical holes, said first and second holes defining a vertical web between said parallel holes, a pair of strain gages located in each of said parallel holes adjacent said minimum thickness of said web, said strain gages being in vertical alignment in each of said parallel holes for measuring strains in said beam when a load is applied along said beam.

6. A cantilever beam assembly for a load cell comprising a longitudinally extending rectangular support beam attached at one end to a rigid member, said support beam having sidewalls and a top and a bottom surface, first and second parallel cylindrical holes extending completely through said sidewalls of said beam, said beam completely surrounding each of said parallel cylindrical holes, said first and second parallel cylindrical holes defining a vertical web between said first and second parallel holes, said web having a minimum thickness, first, second, third and fourth strain gages being located on the interior surfaces of said first and second parallel holes respectively, said first and third strain gages being located on the interior surfaces of said first and second parallel holes respectively at a point adjacent said web and above said minimum thickness, said second and fourth strain gages being located on the interior surfaces of said first and second parallel holes respectively at a point adjacent said web and below said mininum thickness.

7. A cantilever beam assembly for a load cell according to claim 6, wherein said top and bottom surfaces of said support beam have concave recesses located above and below said first and second parallel cylindrical holes.