Patent GB-191318694-A (GB)
Title: Improvements in or relating to Safety or like Lamps.
Inventor: HAILWOOD ERNEST ARTHUR
IPC: B65D5/52
Filed: 1913-08-18
Granted: 1914-10-19
Abstract: 18,694. Hailwood, E. A. Aug. 18. Miners' and like safety lamps having an outer glass G, Fig. 1, and a metal chimney C are fitted with an inner glass A, suspended from the chimney C or in a framework attached thereto, and having a separate or integral base-piece with a circular or rectangular aperture A<1> for the lamp flame. The chimney, inner glass, and associated fittings form a "combustion tube" which may be inserted in existing lamps. In one form, Fig. 1, the glass A is supported by a frame A<2> secured to the chimney C. The frame has a spring clip O<5> embracing the glass, and a base A<3> with a flameaperture A'. In order to support the glass securely, the frame A' may be of springy material with a kink A<9>, and additional springs may be provided. The chimney C is provided with a curved, coned, or stepped-up gauze disk D, and with a supporting-ring D<3>, Fig. 2, resting on the outer glass G. An outer gauze Dx and a bonnet H are provided, and the chimney C may be open at the top or provided with a hinged cowl C', and may have a baffle-ring C<2>. A guard-plate M<1> protects the air-inlets M<2> in the middle ring from air currents. In modifications :-(1) The glass A is suspended by spring clips 0, Fig. 4, secured internally or externally to the chimney, and the gauze D<3> may be flat or curved &c. (2) The flanged glass A, Fig. 6, is secured to the chimney by brackets O<1> carrying springs O<2>. (3) A cylindrical glass is placed in a carrier Ax, Fig. 8, having a flame-aperture A', and inserted in a wire clip O<5> on the chimney ; or a flanged glass is inserted in the clip O<5>. (4) The glass is inserted in a band clip O<6>, Fig. 10, open at one side, and carried by a bracket O<4>, which is fixed to the chimney C or provided with a second clip encircling the chimney ; the clip O<6> may be connected to the bracket O<4> by a spring. (5) The glass-carrier is attached to the chimney by a bayonet-joint formed by catches on the carrier and recesses in the chimney flange. (6) The glasscarrier A, Fig. 13, is in two parts attached by a joint A<10>, and a band clip O<6> embraces the glass. (7) The chimney C is provided with a slidable flange-member O<8>, Fig. 14, held up by a spring O<10>, and having a recessed opening O<9> for the insertion of the flange of a glass or glass-carrier. (8) A recessed ring O<11>, Fig. 15, for the flange of a glass or carrier is hinged to the chimney, and may have an outer flange to which the gauze flange D<3> is secured. (9) The glass is held by a serrated spring flange O<12>, Fig. 16. (10) The glass A, Fig. 18, is centred by means of a flanged ring B engaging the flame-aperture A<1>. The ring B has arms B' engaging the wick-tube, or arms or pillars terminating in a flange secured to the lamp body. An additional gauze D<5> may be flanged or secured to the chimney at the top. (11) The chimney is sprung or screwed at its base into a ring supporting the inner glass. (12) The glass is supported by a ring A<6>, Fig. 20, resting on the outer glass, and having pillars A<8> carrying a base A<3> for supporting the inner glass ; or a ring resting on the outer glass may grip the inner glass by means of a flange &c. (13) The glass-carrier is provided with a lens E, Fig. 21. (14) The glass or its carrier is engaged by pins carried by spring arms on the chimney. (15) The flange of the chimney C, Fig. 23, is provided with studs O<16> engaging a recessed ring O<17> with securing-projections O<18>. (16) The flame aperture is formed in a loose glass or metal disk resting on a flange in the base of the inner glass. (17) Silvering or enamel may be applied to the inner glass or the glass-carrier or any metal near the flame, or to separate pieces of metal attached to the carrier &c. To ensure the lamp being properly assembled, interengaging projections or recesses may be formed in the glass-carrier, gauze flange, middle ring, &c. In place of loose washers, a washer of pulp &c. may be provided on the outer edge of the gauze flange D<3>, Fig. 4, or a washer may be carried by arms attached to the chimney &c. (18) The Provisional Specification states also that the inner glass may be provided with an apertured flange resting on the outer glass or an interposed asbestos washer, or may be supported by legs or supports attached to the glass-holding ring or the fuel-reservoir.