| 摘要 |
549,104. Electric torches. WEBSTER, J. S. Aug. 17, 1940, No. 13162. [Class 39 (ii)] In an electric torch, the usual screwed head 16 carrying the glass cover plate and the reflector is made a sliding fit on the barrel and may be pushed out by the thumb against the action of the spring 18 so as to alter the focus of the lamp and may be rotated to switch the lamp on. The head carries a contact plate 14 recessed within its inner surface to co-operate with a metal tongue 1.3 integral with or attached to the lamp socket which is thus in connection via the spring 18 with the torch barrel the inside of which is connected by the tongue 41 with the spring 42 which engages the negative pole of the battery. The spring 42 is carried by the closure member of a sleeve having a bayonet-slot attachment to the end of the barrel of the torch and an end cap 29 screws on to the sleeve. |
