Patent GB-378904-A (GB)
Title: Improvements in miners and garage safety lamps
IPC: F21L23/00
Filed: 1931-03-19
Abstract: 378,904. Miners' and garage safety lamps. HAILWOOD, E. A., Beacon House, Texas Street, Morlev, near Leeds. March 19, 1931, No. 8396. [Classes 75 (i) and 75 (iv).] Wick burners; wick-operating devices.-A miners' or garage safety lamp comprises a middle part D having a deep rectangular flange to embrace a rectangular oil vessel O, internal means to secure together the oil vessel and the middle part, and locking means, the middle part being connected by pillars or tubes P to the upper or bonnet portion with an interposed outer glass G. For this purpose the oil vessel is provided with a deep upstanding bush O<1>. Slots E<2>, Fig. 6, are cut across the corners of the bush O<1> and co-operate with gaps E4 in guards E<3> at the corners of a flanged plate E, the air then passing through registering spaces M<2> in plates M<1> which clamp in position metal gauze sheets M. The upper part of the oil vessel is formed with an upstanding flange O<2> which projects through a central opening M<4> in the plates M<1> and carries the burner and wick tube W. The middle part D supports a collar H<1> carrying a bolt H which is received by a rotatable threaded member F<1> in a tube F and provided with a key head F<2> to lock the parts together. The lower end of the member F<1> is housed in a false bottom J and provided with external ratchet teeth F<3> for engagement by the nose K of a magnetic or like lock. The Specification describes other means for locking the oil vessel to the middle part, in one form, Fig. 10 (not shown), the false bottom is rotatable and provided with means, Figs. 12 and 13 (not shown), for looking it in correct position. The plates M<1> or other parts are adapted to raise a bar L against the action of a spring L<1> to project through one of the hollow pillars P above the ring B and engage stops N<1> on the bonnet N to prevent the latter being unscrewed until the oil vessel has been removed. The wick may be raised and lowered by a long bent arm R .secured to a vertical rod R<1> having a thumbpiece R<2> projecting through slots in another hollow pillar P or a separate tube and controlled by an external spring R<3>. Figs. 15 and 16 (not shown) illustrate other wick raising and lowering means which are described in detail in the Specification. The flame gap may be controlled by two dome-shaped drums S<1> having perforations S<4> and rotatably mounted by means of spindles S having thumb-pieces S<2> operating against a coil spring S<3> or a spring finger passing over dimples on the lamp body. The gauzes A, A<1> are provided with depending aprons A<4>, A<5> bearing suitable wording to indicate the presence or absence of the gauzes and also acting as reflectors, as described in Specification 377,186. The combustion tube comprises an outer chimney C<3> carrying a spring C<7> and pins C<5> adapted to press an inner chimney C<6> down on to a glass C<1> supported by a flat or domed platform C<8> carried by bars C9 from a flange C<2>. The bonnet N is provided with outlet apertures N<2>, N<4> guarded by a ring N3 and a cover N<5>. The bonnet or the guard ring carry on one or opposite sides hinged flaps to receive a tea or like can, or, as shown in Fig. 22, the can T may rest on lugs N<1> and be provided with lugs T<4> to hook over projections N<6> on the guard ring, the can being cut away to embrace the bonnet. The Specification also describes other forms of cans one of which is jacketed (see Fig. 23, not shown) and others are provided with internal tubes (see Figs. 21 and 24, not shown) for the passage of heat, which tubes may be opened and closed by movement of the lid of the can.