US 1596837 A
Description (OCR text may contain errors)
Aug. 17 1926.
A. HOPKINS now AIR BLOWER Filed'April 15, 1926 INVENTOR flyredffopkns ATTORNEYS Patented Aug. 17, 1926.
ALFRED HOPKINS, OF ALLSTON, MASSACHUSETTS.
Application filed April 15, 1926. Serial No. 102,363.
This invention relates to a hot air blower, and has for an object a provision of simple, durable, efficient means whereby a jet of hot-air of considerable force can be projected from a suitable manipulative device.
A further object relates to a construction of blower which is easy to manipulate whereby a jet of air can be directed readily on any desired surface.
The invention is illustrated in the drawlngs of which Figure 1 is a vertical longitu inal section through the device.
Figure 2 is a cross-section taken on the line 2--2 of Figure 1;
Figure 3 is a partial longitudinal vertical section taken through a portion of the blower-casing which contains the electrical heating element.
The form of the invention shown in the drawingsis a preferred form, although it is understood that modifications in the construction and arrangement of the parts and in the character of the materials used may be adopted without departing from the spirit of the invention as set forth in the appended claims.
he invention in general comprises a blower-casing the front of which is formed as a nozzle and the rear of which houses a tubular heating element, preferably an electrical heating element. Disposed between the nozzle portion and the heating element is an air jet device adapted to permit air under pressure to be blown through a fine orifice toward the nozzle. This air jet device is actuated by a trigger. The entire unit is held in the hand of the operator by means of a handle and the trigger operated just like a pistol trigger would be operated. The action of the air jet projected toward the nozzle produces a suction which draws air through the rear of the casing past the electrical heating element where it is heated to the desired degree and then passes out through the nozzle. i
The preferred form of the invention comprises a casing 10, having a front end 11, formed with a portion of reduced diameter to act as a nozzle. The rear end of the casing 12 is adapted to house a heating element 13 which is preferably of tubular form to permit air to be drawn in through the rear of the Casing and to be projected through the nozzle. A ring 14: fastened to the rear of the casing acts as a support for electrical conductors 15 which are fastened to the ring by wrapping 16. A nonremovable handle 17 is screwed to the casing and in front of this handle a trigger 18 is pivoted at 19. This trigger is adapted to actuate a stem 20 normally disposed in a position shown in Figure 1 by reason of its weight. This stem when projected upward acts on a valve stem 21 to actuate a valve not shown which. is housed within a valve casing 22 of the Schraeder type. On the lower end of the valve casing an air jet tube 23, having a fine orifice 24 is disposed, this orifice directed toward the nozzle portion. A pipe 25 connects the valve casing with a source of air under pressure.
In the operation of the device with the unit held in the hand of the operator, when the trigger 18 is actuated it moves the stem 20 upward and opens the valve permitting air under pressure to be projected through the orifice 24 toward the nozzle portion 11. This action will produce a suction which will draw air through the rear of the casing, past the heating element- 13 where it will be heated and then projected through the nozzle portion 11.
e What I claim is 1. A hot air blower which comprises a. hollow casing, the front of which is formed as a nozzle, a tubular heating element in the rear of the casing, an air jetdevice within the casing, intermediate its length and manipulatable means for actuating the air jet device, the air being projected toward the nozzle to create a suction which will draw air into the rear of the casing, past the heating element.
2. A hot air blower which comprises a hollow casing the front end of which is formed as a nozzle, an air jet device located within the casing to the rear of the nozzle, a valve mechanism associated with the air jet device, a trigger pivoted to the casing for actuating said valve mechanism, a tubuhollow casing the front end of which is formed with a nozzle, a tubular heating element disposed at the rear of the casing and manipulutuble means disposed in the middle of the casing for projecting jet of air under pressure toward the nozzle.