| 摘要 |
<p>The spherical element can rotate in the body, and the arm carries the contact; the arm is guided around its middle section by two pairs of screws with flat ends on two axes perpendicular to each other. The spherical element is seated in a conical hollow in the body, held thereby a spring loaded ring with a suitable seat. The hollow is in the centre of an element which is screwed into the feeler body and the arm has a peripheral rounded rib on which rest the screws guiding it; the contact is provided on a pin screwed into a tapped hole in the arm.</p> |
