| 摘要 |
909,773. Bells. KRONE, G. June 12, 1961 June 10, 1960], No. 21096/61. Class 13. A sounding-body 1 is supported by a spring element 3 having at least two spring arms 5 whose free ends engage in apertures 6 in the wall of the sounding-body. A rotatable knob 22 has a tapered slot in its edge and thereby controls the amplitude of vibration of the striker 9a and hence the loudness of the bell. |
