Safety portable radiant type electrical heater

Claim 2

In a soldering device having a. a base, b. a lamp attached to the base, c. a reflector surrounding the lamp for focusing the heat rays emitted therefrom, and d. a power source of electricity for the lamp connectable thereto, e. The improved Structure for cooling the lamp and reflector and for purging the work comprising: f. a shroud having i. a circular cross section with ii. an axis extending along the focal axis of the reflector, g. a base plate to which the base is attached in the shroud, gg. said shroud i. surrounding said base, lamp, and reflector, ii. spaced from the reflector to form an annular area therebetween, and iii. having an open front through which the heat rays are projected by the reflector, h. a block in the rear end of the shroud, including means cooperating with the base plate to form j. a plenum between the base plate and block, k. tube means for supplying pressurized gas to the plenum, m. perforations through the base plate to pass gas from the plenum around the base and into the space between the reflector and the shroud, n. an opening in the reflector around the lamp to pass gas around the lamp, 0. a nozzle attached to the front of the shroud, p. tuyeres between the shroud and the reflector at the nozzle attachment to pass gas from the annular area outside the reflector into the nozzle, q. said nozzle having an outlet through which said gas and said heat rays are emitted, r. the cross sectional area of the attachment of the nozzle to the shroud being at least four times greater than the cross sectional area of the outlet of the nozzle, s. said nozzle also functioning to protect the bulb from breakage, t. a switch means responsive to the flow of gas to the plenum for connecting the power source to the lamp, u. a flow path for gas connected to said tube means, v. a movable magnet in the flow path, wherein w. said switch means is magnetically actuated responsive to the position of said magnet, and x. a pistol-grip handle having i. an index finger bight, ii. a forward portion where the fingers encircle the grip, and iii. a back where the palm contacts the grip, y. said pistol-grip handle attached to the shroud, z. the entire device having a center of gravity, aa. the center of gravity located between lines extended from the forward portion of the grip and the back of the grip.

Claim 3

The invention as defined in claim 1 with an additional limitation of bb. an internal circumferential flange on the nozzle surrounding the outlet thereof to spoil the smooth flow of air from the nozzle.