Illumination – Self powered lamp – With movable focusing element
Patent
1988-07-19
1990-02-06
Lazarus, Ira S.
Illumination
Self powered lamp
With movable focusing element
362203, 362205, F21L 700
Patent
active
048992658
ABSTRACT:
A miniature flashlight as disclosed to comprise a barrel, a tail cap, a head assembly, and means for holding a miniature lamp bulb and for providing interruptible electrical coupling to dry cell batteries retained within the barrel. The means for holding lamp bulb comprises an insulated receptacle disposed external to the end of the barrel to which the head assembly is engaged, a second insulated receptacle disposed within the barrel and matingly engaging with the first insulated receptacle so as to enable the first and second insulated receptacles to translate axially through a distance limited by a flange formed on the first insulated receptacle and an annular lip formed inwardly at the end of the barrel, and a pair of conductor members mounted in the second insulated receptacle such that one of the conductors serves to couple the center electrode of a dry cell battery to a first pin of the lamp bulb and the other conductor member serves to electrically couple the second pin of the lamp bulb to the lip formed on the barrel. A spring is disposed between the tail cap and the batteries within the barrel to urge the batteries into contact with the center conductor on the second insulated receptacle, thereby urging the second and the first insulated receptacles in the same direction until the second insulated receptacle contacts the lip on the end of the barrel whereat the second conductor member is in contact with the lip. The electrical circuit is thus closed by use of the barrel, the tail cap, and the spring to couple the second pin of the lamp to the case terminal of the battery. By threadably engaging the head assembly onto the barrel in a direction causing the head assembly to translate along the barrel towards the tail cap, the reflector moves with respect to the lamp bulb to cause a variation in dispersion of the reflected light beam emanating from the lamp bulb.
REFERENCES:
patent: 1584539 (1926-11-01), Hopkins
patent: 1680169 (1928-10-01), Osean
patent: 2016819 (1935-07-01), Meginniss
patent: 2097222 (1937-04-01), Tompkins et al.
patent: 2176301 (1939-10-01), Haas
patent: 2339356 (1941-08-01), Sachs
patent: 2490830 (1949-09-01), Norton
patent: 2530913 (1950-11-01), Shackel
patent: 2599295 (1952-09-01), Thomas
patent: 2915621 (1959-02-01), Garland
patent: 2931005 (1960-07-01), Saurwein
patent: 2945944 (1960-06-01), Gillespie
patent: 3076891 (1963-02-01), Moore
patent: 4203150 (1980-10-01), Shamlian
patent: 4234913 (1980-01-01), Ramme
patent: 4261026 (1981-03-01), Bolha
patent: 4286311 (1981-03-01), Maglica
patent: 4329740 (1982-07-01), Colvin
patent: 4388673 (1983-04-01), Maglica
patent: 4398232 (1981-04-01), Nelson
patent: 4429351 (1984-04-01), Petzl et al.
patent: 4472766 (1984-11-01), Hung
patent: 4531178 (1985-07-01), Uke
patent: 4577263 (1986-06-01), Maglica
patent: 4658336 (1987-04-01), Maglica
patent: 4695551 (1985-03-01), Foltz
patent: 4777582 (1985-10-01), Sharrah
Mag Instrument, Inc. Brochure, "Exhibit B", Illustrating Flashlight of Maglica Patent 4,286,311.
Lazarus Ira S.
Mag Instrument Inc.
Neils Peggy H.
LandOfFree
Miniature flashlight does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Miniature flashlight, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Miniature flashlight will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-445006