GB1006368A - Portable lamp - Google Patents

Abstract

1,006,368. Electric battery lamps. O. W. SCHOTZ. Sept. 26, 1961, No. 38016/63. Heading F4R. [Also in Division H2] A portable hand lamp especially for underwater use comprises a casing 14, formed of two parallel cylindrical chambers 42, 44 to receive the batteries and a head portion 16 housing the bulb 86 and reflector 75, a resilient split ring 130 being slidably mounted in the head portion and having a battery contacting portion 14b and an open section at least equal to the diameter of the second chamber 44 so that in one position it contacts the batteries 46a in the second chamber and in the other the open section straddles the end of the second chamber. The reflector 75 and cover glass 68 are mounted in a U-shaped ring and held in place on the front of the head portion 16 by a screwed ring 18. The bulb 86, which has an end contact and a locating and contact-making flange, is held inside a metal sleeve 96 having an insulating lining, the sleeve contacting the flange and a spring contact at the base of the insulating lining contacting the end contact. An eyelet passing through the lining connects the spring contact to the first of a series of batteries 46, 48, 50 located in the chamber 42 and connected by means of a spring plate with bent back ends 126, 128 to a second series of batteries 50a, 48a, 46a located in the chamber 44, the first one 46a of which engages the contact 146. The sleeve 96 carries a metallic disc 105, the outer edge of which is in contact with a spring strip 208 secured to a rivet 204, the head of which is housed in a recess in the base of the switch housing 168 and covered by a cap of polyethylene having a central rivet normally out of contact with the head of rivet 204. The spring ring 130 engages a contact strip 198 connected by a rivet 190 to a metallic strip on the floor of the housing, which is permanently in contact with a bowed spring 212 on the inside of the switch operating knob 223. The knob has three positions determined by detents, in the first of which the circuit is open. In the second position, one end of the spring 212 engages the rivet in the polyethylene cap and the lamp can be flashed by bringing the rivet into contact with the rivet 204 by pressure on the knob 223. In the third position, the end of the spring 212 engages the cap rivet and presses this into permanent contact with the rivet 204. In a modification, the switch has only two positions, pressure on the knob in the "off" position producing the flashing. The reflector and cover glass may also be mounted between a shoulder on the ring 18 and a resilient gasket secured between the ring and head portion 16. Alternatively, they may be held between a shoulder on the ring and a snap ring held in a recess in the ring with a gasket between the shoulder and the cover glass. In this case the ring may have a wedge-shaped recess which receives the tapered end of the head portion 16.