Geometrical instruments – Distance measuring – Single contact with a work engaging support
Patent
1991-12-30
1992-11-03
Cuchlinski, Jr., William A.
Geometrical instruments
Distance measuring
Single contact with a work engaging support
84454, 84458, 84DIG18, 84200, G10C 300
Patent
active
051597624
ABSTRACT:
The present invention enables accurate measuring and regulating operations to be carried out by measuring with a rule the quantity of movement of a hammer in a grand piano during an action mechanism regulating operation for attaining the normal striking of wires with the hammer. The wires S provided in a tensed state are held between the lower surface of a mount 4 and a locking rod 3 on a measuring tube 2 pressure-contacting the same lower surface, and the lower end of a measuring rod slidingly moved in the measuring tube is placed on the top end of the hammer, the quantity of movement of the hammer being then read directly with reference to the relative positions of a scale mark 8 shown on the measuring rod 1 and the upper end of the measuring tube 2.
REFERENCES:
patent: 3183761 (1965-05-01), Van Ooyeu
patent: 3353434 (1967-11-01), Habig et al.
patent: 3667336 (1972-06-01), Itzler et al.
patent: 4307648 (1981-12-01), Stahnke
patent: 4452122 (1984-06-01), Kovach
patent: 5065660 (1991-11-01), deBuda
Cuchlinski Jr. William A.
Dowling William C.
Kawai Gakki Seisakusho Co., Ltd.
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