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A Belleville washer is a type of spring shaped like a washer. It is the shape, a cone frustum, that gives the washer its characteristic spring. The "Belleville" name comes from the inventor Julien Belleville who in Dunkerque, France, in 1867 patented a spring design which already contained the principle of the disc spring.
Belleville Township High School District 201 (BTHS District 201 or Belleville 201) is a school district in Illinois, headquartered in Belleville. It is within St. Clair County . The district includes the majority of Belleville, Millstadt , and Swansea , along with most of Fairview Heights .
"Type" is not to be confused with "form" (but often is). The British Standard for Metric Series Metal Washers (BS4320), written in 1968, coined the term "form". The forms go from A to G and dictate the outside diameter and thickness of the flat washers. Form A: Normal diameter, normal thickness; Form B: Normal diameter, light thickness
Thus, Belleville East High School was constructed, opening in the fall of 1966. The new campus was built in a college format with many different buildings. The newly commissioned Belleville Area College (now Southwestern Illinois College) occupied half of the campus while the new high school occupied the other. However, enrollment in the school ...
Prior to 1966, Belleville Township School District operated only one school, Belleville Township High School, which was the old Belleville West campus (a new campus has since been built). The growth of the district prompted the local board of education to construct a new campus and divide the student body between the two schools.
A wave spring has advantages over a traditional coiled spring or a washer: [4] Axial space can be reduced by up to 50%. As a result, the overall size of the assembly becomes smaller, reducing weight and production cost. The load in an axial direction is 100% transferable. One multi-turn wave spring replaces multiple stacked wave washers. This ...
In 1960, Albert R. Zuroweste, the Bishop of Belleville, met with lay leaders of the Belleville area concerning conditions existing at the Cathedral High School for boys and the Academy of Notre Dame for girls.
In recent years, average temperatures in the county seat of Belleville have ranged from a low of 22 °F (−6 °C) in January to a high of 90 °F (32 °C) in July, although a record low of −27 °F (−33 °C) was recorded in January 1977 and a record high of 117 °F (47 °C) at East St. Louis, Illinois was recorded in July 1954.