Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1989-08-08
1990-06-19
Cuchlinski, Jr., William A.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
273 32H, G01C 1510
Patent
active
049340603
ABSTRACT:
A golfer's aid for helping a golfer determine the contour of a putting green and a method of assembling the golfer's aid are disclosed. The aid includes a plumb bob and a plumb line having a first end secured to the plumb bob and a second end secured to a cylindrical shaft which is mounted in a golf ball shaped casing. The casing has a first hemispherical half and a second hemispherical half which are snapped together to form the casing. When snapped together, the first and second hemispherical halves define a chamber for housing the plumb bob. The walls of the chamber, in turn, define an inner bore for receiving the plumb line and an outer bore for receiving the plumb bob. The first half of the casing also defines a round hole for rotatably receiving a first end of the shaft. The second half of the casing is provided with a shaft retaining ring for rotatably receiving the other end of the shaft. The retaining ring and the round hole oppose one another to that the longitudinal axis of the shaft is aligned with the axis of the casing when the shaft is mounted in the casing. The shaft further includes a retaining collar mounted on the shaft at a location adjacent the shaft's first end. The collar abuts up against that portion of the interior surface of the second half which surrounds the round hole. As such, the second end of the shaft is prevented from slipping out of the retaining ring.
REFERENCES:
patent: 2136072 (1938-11-01), Bush
patent: 3242582 (1966-03-01), Garrett
patent: 3309089 (1967-03-01), Doyle
patent: 3478438 (1969-11-01), Lazar
patent: 4260151 (1981-04-01), Weaver
patent: 4459761 (1984-07-01), Bosco
Cuchlinski Jr. William A.
Dowling William C.
Smith Brian D.
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