| 摘要 |
<p>1,262,088. Retractive. switches. JOSEPH LUCAS (INDUSTRIES) Ltd. 18 June, 1969 [28 June, 1968], No. 30902/68. Heading H1N. A body carrying two pairs of contacts is surrounded by a sleeve, axial movement of which operates one pair of contacts while an operating member carried'by said sleeve, and movable transversely thereto, operates the other pair of contacts. A tubular support 11 which comprises the operating member of a vehicle direction indicator has two blade springs 18, 19 connected thereto and held in position by an insulating body comprising two identical halves, only one, 14, being shown. The two half portions 14 (15, Fig. 2, not shown) have interlocking means 17 and are secured together by a rivet 16. The spring blades 18, 19 are located by lugs such as 14a passing therethrough into the support tube 11, and are biased outwardly to abut stop projections such as 14b. Two further blades 20, 21 are held in position by projections integral with the parts 14, (15), and leads 12, 13 passing through support tube 11 are connected to blades 20, 21 respectively. The body comprised by the two parts 14, (15) is generally cylindrical and slidably mounted thereon is a moulded sleeve:22 having a snap-fit end cap 23 pushed thereon. A spring 24 urges the sleeve assembly 22, 23 to the right, and axial movement to the left causes a ramp 25 to cam blade 18 into contact with blade 20. A lever 26 is pivoted on one side of sleeve 22, and is urged outwardly by a spring-loaded roller 28 acting on its sloping end surface 27. Depression of lever 26 moves blade 19 into contact with blade 21. A shoulder 26a on lever 26 abuts one face of a stop projection 14b if the sleeve 22 has been first moved axially, or abuts the end of projection 14b if sleeve 22 is urged axially after operation of lever 26, thereby preventing closure of both contact pairs 18, 20 and 19, 21 at the same time.</p> |
