Abstract: A measuring apparatus for measuring an object includes a base member including a portion having a medial cavity and an extendible member that slidably engages the medial cavity of the base member. The extendible member includes a medial member having a mid point indicator defined by an elongate medial passageway, and a point locator defined by a passageway formed through an end portion thereof. The extendible member also includes a pair of opposing flexible members connected to the medial member. Each one of the pair of opposing flexible members have point locators defined by passageways formed through end portions thereof. The measuring apparatus also includes an intersection member connected to the point locaters on the pair of opposing flexible members, and a plurality of sets of measurement marks carried by at least one of the base member and the extendible member relating to a predetermined measurement of the object to be measured.

Abstract: A method and apparatus that will locate the center of a circle in a single operation by positioning two points of registration at the edge of the circle relative to a third point of registration previously set at the edge of the circle where these points are held in accurate spatial relationship to each other and a fourth point of registration that in turn, indicates the center of the circle. By allowing precise registration and novel operation, this invention provides a simpler, more accurate means to locate the center of a circle that precludes the need to make extraneous marks on the circle being measured.

Abstract: A method and apparatus that will locate the center of a circle in a single operation by positioning two points of registration at the edge of the circle relative to a third point of registration previously set at the edge of the circle where these points are held in accurate spatial relationship to each other and a fourth point of registration that in turn, indicates the center of the circle. By allowing precise registration and novel operation, this invention provides a simpler, more accurate means to locate the center of a circle that precludes the need to make extraneous marks on the circle being measured.