Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1976-01-22
1976-11-23
Smith, Gary L.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 58, 51 59R, 219121L, B24C 332, B23K 900
Patent
active
039928195
ABSTRACT:
Apparatus for equalizing the electrically effective value of an electrically conductive layer is described wherein the equalization is effected by a tool, such as a sand-blasting device or laser that does not contact the layer, which is caused to traverse the layer to reduce the thickness thereof under the action of a thrust device acting on a pivoted tool guide under the control of an electrical circuit responsive the resistance of the layer. The tool guide is a two-part telescopic device pivoted about a point displaced above the working end of the tool by an amount that is many times greater than the distance of the working end of the tool above the layer, which distance is kept constant by controlling the length of the telescopic guide. For this purpose a feeler device on the lower part of the guide is maintained in contact with a cam surface which determines the length of the guide against spring reaction as the guide turns about the pivot point. As a safety measure a spring element is interposed between the thrust device and the guide to absorb any unexpected resistance to movement.
REFERENCES:
patent: 3469076 (1969-09-01), Saslawsky
patent: 3577682 (1971-05-01), Kulischenko
patent: 3691695 (1972-09-01), Green
patent: 3702042 (1972-11-01), Cochran
patent: 3916142 (1975-10-01), Ennis
Precitec Gesellschaft fur Prazisionstechnik und Electronik
Smith Gary L.
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