Measuring and testing – By abrasion – milling – rubbing – or scuffing
Patent
1974-05-31
1976-06-08
Ruehl, Charles A.
Measuring and testing
By abrasion, milling, rubbing, or scuffing
G01N 356
Patent
active
039615219
ABSTRACT:
A system and machine, or orbital brushing simulator, especially designed for testing the effect of cleaning and polishing agents and of brushes on tooth or similar specimens, with particular respect to enamel, dentin, or cementum abrasion, enamel or dentin polishing, enamel scratching, and cleaning. The machine accommodates several individually-mounted specimens, each acted upon by a brush moving over it in either of two directions, or in combinations of the two, thereby avoiding grooving of the specimen surfaces as well as providing more flexible and useful patterns for study. The system has a gravity-operated mechanism to set the pressure between each specimen and its brush, which thereby avoids variation in the pressure in a test involving a substantial number of cycles. This means is adjustable to provide very light pressures that are nevertheless steady. Means are provided to maintain a uniform suspension of the cleaning and polishing agent during the testing operation. The speeds and ranges of the brush movements in the two directions are separately adjustable; counters are provided for setting and indicating the number of brushing cycles to be performed; and the machine stops upon cycling the respective number, then reverses itself at an appropriate speed to the extent necessary to return the machine to neutral or its centered position in each axis, after which it ceases operation.
REFERENCES:
patent: 2189589 (1940-02-01), Mahannah et al.
patent: 2323175 (1943-06-01), Young et al.
patent: 2660055 (1953-11-01), Thommen
patent: 3216238 (1965-11-01), Bailey
patent: 3555877 (1971-01-01), Thelin
"Test for Resistance of Porcelain Enamels to Surface Abrasion" , Porcelain Enamel Institute, Inc., Product Standards Section, Mar. 1942, pp. 4-11.
Bailey Ronald L.
Muhler Joseph C.
Putt Mark S.
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