US2712819A - Gas fueled incinerator for sterilizing inoculating loops - Google Patents

Description

s. ROSEN 2,712,819 GAS FUELED INCINERATOR FOR STERILIZING INNOCULATING LOOPS Filed May 9, 1951 2 Sheets-Sheet l 3 Wu Wm Sidney Rose/2 S. ROSEN July 12, 1955 GAS FUELED INCINERATOR FOR STERILIZING INNOCULATING LOOPS 2 Sheets$heet 2 Filed May 9, 1951 Fig. 2.

IIIIIIIIIIIIII 3mm Sidney Rose/2 asenteol iey Baltimore, Md.

= May 9, r "l, No. 225,414.

This inve tion relates to a gas bill sterilizing wire loops used for inoculating it has been customary heretofore to sterilize such inoc lating loops by passing them i the flame of an ordinary Bunsen burner. so doing, diiierent parts of the wire would be heated to dilierent temperatures due th limited area or" the high temperature portion of the .e. The lower to erature portion of the Bunsen fl although ln'g rough to drive on the culture media is not necessarily high enough to kill oi the bacteria th The result is that it great care is not used, this non-sterile culture 2 edia will be driven oil to contaminate the atmos phere and create a dangerous source of infection. with the present device, the entire length of the inoculating usly to a uniformly high to: at any culture media that may will strike the heated Wall of ie chainbe hich instantly destroys the bacteria therein and ren ers it sterile.

The object of this invention is to provide a simple laboratory device for sterilizing inoculating loops or other small col animated bacteriological instruments. ther object of the invention is to provide such sterilization without the need for a surrouncing hood. A still further object of the invention is to provide means whereby the inQcuia-"ug loop or other instrument may be under continuous observ tion while being heated for steriliz More specifically, an object is to provide a convenient ncinerator burner in combination with a conventional Bunsen burner. Yet another object is to provide a dual burner having a 3-Way valve to control the gas flow to tive flames and to permit the control of both burners from a single valve. A still further object is to provide such a combination burner with adjustable pilot flames.

in the drawing, 1. shows a side view of the combina tion burner structure. ig. 2 is a section of the entire burner. Figs. 3, 4, and 5 are transverse section at 33, ll, and respectively. Fig. 6 shows four positions of the three Way valve.

in Figs. 1 and 2, the burner base is shown at l; 2 and '7 are the burner tubes; 3 and 3 show the respective gas jets 'n the burners; d is the air adjustment sleeve on the first urn r and 3/ is the air opening to the second burner; 5 and respectively are the pilot light tubes; 6 and 11 are screw controlled needle valves for adjusting the pilot flames; 12 shows the grid in the incinerator burner which is of the Meker type. 13 is the stove or shield surrounding the flame and M is the glass l ner which forms the window in the metal shield. 15 shows the gas inlet tube to the two burners; i6 is the three Way rotary valve. 17 are supports for holding the metal tube 1% is the opening in the metal shield and 19 shows the inoculating loop in position to be sterilized.

in operation, the gas enters the burner through the inlet 15 and passes up to the valve 16. The gas also passes the needle valves 6 and M and up the pilot light tubes 5 and The gas passing through these tubes is ignited at the tip of the tubes and valves 5 and ll are adjusted ill.

driven or vaporized the respec- 3 7 give the opt nuin to give the desired may be in degree of opening in each occ 'es the position she.

irom both burners; l in c it ti vs to the inciuer:

size of ilot flame.

T he main valve adjusted to four basic positions with variations tion. When the valve the drawing, the incinerator burner is shown at an angle of with the ve burner. This angle is not critical but it is desirable i be sufficiently inclined from the ve ii lsuiirgyi of the wire loop to he ste n ut exposing ones hand to the heat of the frame. The dr g also shows fixed opening 9 for supplying air to ti inc. This opening can be made variabl .ing sleeve as sho at d on the Since the incinerator burner ose only, it is quite satisfactory to use a of suclsize as to size ii r e at opera g the burner, adjusted to ti he two pilot lights are proper size oy means of he may th e opened to -.o either or both b rners.

is thus i ted, the object the end or tube 13 by 1= tongs. The object i and when glows u.

ans of a suitable an observed through the wins rrnly it is completely sterile.

l burner comprising a burner tube, a ga within the tube, an air supply opening for said jet in the tube, a perforated top for the burner tube, a metal tube supported coaxially of and spaced from said burner tube in a longitudinal direction and in heat receiving relation thereto, said metal tube having an opening in the side thereof extending substantially the length of the tube, a tight fitting, heat resistant, glass cylinder within the said tube.

2. A burner structure in accordance with claim 1 Wherein a pilot flame tube extends up to the perforated top Within the burner tube, said pilot flame tube being connected to the gas supply by means of an adjustable needle valve.

3. A burner structure in accordance with claim 1 Wherein the metal tube of a diameter greater than the perforated top of the burner tube.

4. A burner structure accordance with claim 1, including a base supporting the burner tube at a substantial angle from the vertical.

A burner structure in accordance With claim l, including a base supporting the burner tube at an angle of approximately 45 from the vertical.

References @Cited in the file of this patent UNETED STATES PATENTS

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