Battery powered lamp device

A battery powered lamp device comprising an upright base of metal, a bulb and switch-retaining member of metal and an upright chimney, said member having lower and upper ends and being mounted on the upper end of said base, said chimney being mounted on the upper end of said member, a bulb having a base provided with an electrical contact, said base having an upright elongated battery receiving cavity closed at its bottom and open at its top, said member having an upright bore in registry with said cavity, said bulb being mounted within said bore to extend thereabove into the lower portion of said chimney, the base of said bulb being fitted into the upper portion of said bore for positioning said contact centrally of said bore, a compression contact spring within said cavity in electrical contact with the bottom thereof, a battery within said cavity extending into said bore and at one end engaging said spring and further being operatively engageable at the other end with said bulb contact, electrical switch means on said member for controlling the application of energizing voltage of said battery to said bulb, said spring being helical and urging said battery upwardly to engage said other battery end with said bulb contact, said electrical switch means including a manually operable switch element operatively threaded to said member for movement transversely to the longitudinal dimension of said cavity and bore, said switch element having a cam portion on one end operatively engageable with an upper edge portion of said battery whereby rotation of said element in one direction forces said battery downwardly thereby to disengage said battery from said bulb contact and in the other direction permits said battery to move upwardly under the force of said spring to engage said bulb contact.