US2532144A

US2532144A - Insecticide bomb

Info

Publication number: US2532144A
Application number: US554230A
Authority: US
Inventors: Brown Gregory
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-15
Filing date: 1944-09-15
Publication date: 1950-11-28
Anticipated expiration: 1967-11-28

Description

Nov. 28, 1950 G. BROWN INSECTICIDE BOMB Filed Sept. 15, 1944 Patented Nov. 28, 1950 UNITED STATES PATENT OFFICE INSECTICIDE BOMB Gregory Brown, Bridgeport, Conn. Application September 15, 1944, Serial No. 554.230

1 Claim.

This invention relates to dispensing apparatus for use in connection with the dispersion of insecticides.

The patent to Goodhue et al. No. 2,321,023 describes a methodof producing insecticidal aerosol which involves confining in a receptacle under superatmospheric pressure a liquified gas containing in solution a suitable insecticide and releasing the receptacle contents as desired through a discharge orifice into the atmosphere. The receptacle contents are forced out into the atmosphere by the high vapor pressure of the liquefied gas and the liquid solvent instantly evaporates into the atmosphere separating the solute into particles of colloidal dimensions and leaving them suspended in air in the form of an aerocolloid which is known as aerosol.

An object of this invention is an expensive and highly efficient device for releasing and dispersing insecticides in accordance with the Goodhue et a1. method.

Other objects, novel features and advantages of this invention will become apparent from the following specification and accompanying drawings, wherein:

Fig. 1 is an elevation partly broken away of an insecticide bomb embodying the invention;

Fig. 2 is an enlarged fragmentary view through the release mechanism;

Fig. 3 is a section on the line 33 of Fig. 2, and

Fig. 4 is an enlarged fragmentary section similar to Fig. 2.

In the drawings, Ill is a receptacle of any suitable construction having at one end an aperture into which is fitted a tubular member I I having a gas-tight fit with the container. The member I I has a central bore I2 of varying diameter and a pipe I3 has one end projecting into the bore with its remaining end arranged near the opposite end of the receptacle Ill. A portion of the bore I2 is shaped to provide a valve seat 14 with which co-operates a valve I5 arranged in an enlarged portion I2a of the bore. The valve I5 is carried by a plug I5 arranged in the bore I2 and having threaded connection with the inner surface thereof at H. In the plug I5 is a central passageway I3 having its inner end terminating above the tip of the valve l5 and having a cross channel I9 communicating with the chamber formed by the enlarged portion I241 of the bore l2. Rotation of the plug It causes axial movement of the valve It into and out of engagement with the valve seat I4.

A cap Zll has a central aperture 2| of slightly larger cross-section than the plug I6 and a threaded portion 22 screwed onto the tubular member I! with the plug extending through the aperture. A thin sleeve 23 of Babbitt metal snugly surrounds the plug I6 and has a flange 24 resting on the outer end of the member II. The end of the sleeve 23 away from'the flange 24 projects through the aperture 2| in the cap 28 and fills the gap between the aperture periphery and the plug surface. A ring 25 of flexible material such as neoprene surrounds the bushing 23 and is contained in an inverted cup 26 arranged in the cap 25 and having an aperture through which the sleeve 23 extends with the rim of the cup adjacent said flange.

A fluted rod 2'! is arranged in the passageway I8 and has upper and lower ends oblique with respect to the longitudinal axis thereof. A bushing 28 is threaded into a tapped recess 29 in the outer end of the plug I6 and receives the upper end of the rod 21 in a central bore 36* which ter minates in a restricted orifice 3 I. A flanged disk 32 is fixed to the plug 16 and provides means for efiecting rotation thereof as well as affords protection to the cap 29.

Under normal conditions, the plug I6 is so arranged that the valve I5 engages the seat I4 thereby sealing the receptacle and the receptacle contains under superatmospheric pressure a liquefied gas containing an insecticide in solution. An insecticide of this character is disclosed in U. S. patent to Goodhue, No. 2,306,434. In order to make use of the device, the plug I6 is rotated through the medium of the disk 32 to disengage the valve I5 from the seat It whereupon the contents of the container pass through the pipe I3 and around the valve I5 into the cross channel I9 and then through the grooves in the fluted rod El to the orifice 3I from which they are discharged into the atmosphere. The oblique face at the end of the rod 27 insures free flow of liquid to the orifice 3| irrespective of the position of the rod in the passageway. Operation of the device is discontinued by rotating the disk. 32

again to engage the valve It with the valve seat A metal-to-metal seal between the rotating and stationary parts of the device is obtained by means of the babbitt sleeve 23 in conjunction with the neoprene washer 25. The thickness of the Babbitt metal sleeve 23 is of the order of .010 inch. Upon screwing down of the cap 20, the flange 24 is forced by the neoprene washer intoa gas-tight seal with the end of the plug I6 and the neoprene washer is caused to bulge inwardly radially in such manner and to such extent as to distort the sleeve 23 inwardly into gas-tight relation to the plug l6.

The fluted rod 21 provides a readily cleanable filter to prevent small particles from clogging the orifice 3|. The flow of the liquid through the fluted rod grooves and around the oblique end of the rod produces turbulence in the liquid as well as reduces the pressure so that the liquid is dispersed through the orifice 3| in the form of a dry spray.

In further explanation of the above; as the liquefied gas rises through the grooves of the fluted rod there is apparently a gradual pressure decrease. Therefore, there is time for conversion to the gas phase in a more complete manner, than when the liquefied gas is directly introduced to the atmosphere through an orifice, so the grooves may be made larger than such an orifice. Consequently, there is less chance for the grooves to become clogged with foreign matter than when an orifice is used. The oblique rod end in the space 30 results in the various gas streams being freed from the confinement of the grooves at different locations therein so that turbulence is effected. Any liquid gas escaping from the grooves is whirled around by this effect while the lighter gas phase can escape through the orifice 3!. Since the pressure is low in the space 39 any liquefied gas therein rapidly converts to the gas phase. Therefore, the spray from the orifice 3| is free from droplets of liquid gas or, in other words, is dry. The orifice 31 may be made large since it is used to eject the gas phase and is not required to eiTect the total pressure drop needed for conversion of the liquefied gas to its gas phase. Consequently, there is little chance for this orifice 3| to become clogged.

I claim:

In a device for controlling the flow path through a member having a central passageway terminating at one end in a recess of enlarged di- 4 ameter and in the other end in a radial passageway, a bushing threaded to said recess and having its bore terminating in a discharge orifice in the exposed end of said bushing and a fluted rod partly received in said bore and partly in said passageway, said rod terminating at each end in a face oblique to the rod axis, said fluted rod forming with the surfaces of said bore and passageway a plurality of channels each terminating in the oblique faces at the opposite ends of said rod.

GREGORY BROWN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 539,961 Russell May 28, 1895 607,019 Comer July 12, 1898 679,733 Edgell Aug. 6, 1901 807,243 Chapin Dec. 12, 1905 883,176 Davis Mar. 31, 1908 1,770,232 Fegley July 8, 1930 1,795,807 Terry Mar. 10, 1931 1,806,101 Thompson May 19, 1931 1,851,940 Chouinard May 10, 1932 2,021,745 Pfelferle Nov. 19, 1935 2,069,630 Steenstrup Feb. 2, 1937 2,132,011 Bennett et al Oct. 4, 1938 2,225,759 Strout Dec. 24, 1940 2,243,995 Alden June 3, 1941 2,325,325 Kiene July 27, 1943 FOREIGN PATENTS Number Country Date 11,824 Great Britain 1905 385,380 Great Britain Dec. 29, 1932 389,658 Great Britain Mar. 23, 1933