| 摘要 |
A sighting device for use on bows comprises a sight carrying plate sandwiched between a mounting plate and a friction plate, the two latter plates being non-displaceable relative the bow, said sight carrying plate being governed in its plane relative the two other plates by three studs rigidly connected to the mounting plate, two of said studs extending through an arcuate slot on the sight carrying plate, which the third stud carries a toothed wheel engaging a toothed rack on the sight carrying plate, said toothed rack being arc shaped and having the same center as that of said arcuate slot.
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