A portable flashlight assembly utilizes a flat battery energy source containing slide contact electrodes. One embodiment includes the use of a film pack from a self-developing camera as an energy source.

A battery-powered lamp has a box-like casing with a top and side walls for housing at least one battery. At least one of the side walls has a depression which provides a generally planar depressed portion having an opening therethrough. A light source is supported in the casing. A lens, through which light from the light source can be transmitted, lens has a peripheral rim which is a friction fit in the opening. On its peripheral rim it has a plurality of ratchet-like teeth mutually spaced around the lens periphery. They make snap fits with and locate behind the material of the side wall bounding the opening so as to resist lens removal. Outside the peripheral rim of the lens is a surrounding flange which limits the depth of insertion of the lens in its opening. The side wall bounding the opening has a plurality of spaced notches which register with the lens teeth to prevent rotation of the lens relative to the opening. The lens teeth are triangular in configuration and are integral with the lens rim. Two opposite side walls each has a depression in which an opening is disposed. The lens is a friction fit in each of the openings.

In a barricade warning light, a first casing formed from two (2) mated halves provides a detachable enclosure, inaccessible (except by a special key) before detachment of a second casing holding batteries replaceable with the casings detached. A mounting rod assembly extends from the first casing for attachment to a barricade. An electronic module holds a photocell, an LED and circuitry energizing the LED when the photocell detects darkness. The first casing has a (a) first opening for coupling the key to a switch controlling the warning light operation, (b) second opening for key insertion to couple (decouple) the first casing to (from) the mounting rod assembly and (c) third opening for key insertion to couple (decouple) the casings. With the casings decoupled, (a) the electronic module may be assembled (disassembled) to (from) the first casing and (b) a base plate is attachable (separable) to (from) the bottom of the first casing. When energized, each LED directs light to the center optical area of a conically shaped lens. One surface of each lens defines a lens system including a Fresnel lens for producing a cone of light with a short axis and the other surface defines pillow lenses for converting such light to a slightly divergent pattern. Each lens has retroreflective material at its peripheries and its corners for reflecting light as from automobile headlights. The warning light may consist of a single unidirectional lens unit or a bi-directional unit formed from a pair of LED's and a pair of back-to-back conically shaped lenses.

A road barricade flasher light combination includes a bracket connecting the flasher light to the hinge pin of a barricade. The bracket is in the form of a lever having a slotted aperture which is permanently fastened to the hinge pin and a cup-shaped recess with an aperture through which the normal threaded bolt of the flasher light extends. The assembly allows pivotal action for installation of the light and then later movement of it into a position on the saddle formed by the top bracket of the barricade.

The specification describes a safety flasher for use by pedestrians, bicyclists and the like for producing a flashing signal, the flasher comprising a casing, a battery in the casing, a lamp secured to and extending exteriorly from the casing and circuit means in the casing connecting the battery and lamp for selectively actuating the lamp, the circuit means including acceleration responsive switch means for causing the lamp to flash ON and OFF.