US961787A - Device for mixing air and gas. - Google Patents

Description

0..S. &--T. W. MOORE.

DEVICE FOR MIXING AIR AND GAS.

APPLIOATION FILED AUG.17, 1909.

PHOTO-LITHO by SACKETT 6 WILHELMS CORP N Y Patented "June 21., 1910;

0. s.,& J. W. MOORE. DEVICE FOR MIXING AIR AND GAS.

. APPLICATION FILED 21116.17, 1909.

m2 9T M 1% 9? 2 in e s 5 eT r r n2 0 iik m m a m c P UNITED, STAw PATENTO FI EA CLARENCE s. Moons JfiHiT-WILLIhM Moons, or LEXINGTON, Kan-room."

I To all whom it may concern:

highest, and this pressure is subject to wide {Be it known that we, CLARENCE of which the following is a specification.

This invention relates to a device for mixing air and gas and delivering the same under pressure, to the burners.

i It is well known that ininany laundries, 'j f-the gas {is-used at the pressure that it is supplied through the.=.-gas-main, which has.

been found to be about- ,six ounces at the and frequent variation. This variation in the-gas pressure 1s very troublesome 1n the operation of ironing machine burners, as-lt 20, i plied to the burners, andat times it is even 1 impossible togetv sufiicient supply of gas necessitates changing the amount of air supproperly linixed for heating the ironing machines; A Y

An object of our inventionis to overcome the-disadvantages-stated above and to roduce a machine which will be adapted to automatically mix the air and gas in proper proportions, and which :will automatically cut off the supply of gas if the machine shouldstop running. v

A further object of our invention is to provide a device-for automatically mixing theair and gas in proper proportions the meansfor automatically mixing the airand gas being regulated by the pressure maintained at the burners.

' This invention consists generally of a mixing chamber into which the air and gas to be'- mixed are introduced, said mixlng chamber having means-associated therewith .-for drawing the air and gas into the same,

. parts, .Figu plete device and illustratingthe manner of using the same. 7 Fig.2 is a vert cal crossand means for-regulating the flow of ga therein.

In the accompanying drawings, forming a part of this specification, and in which like numeralreferences are used to designate like re 1 is a side view of our comsectional view of the mixing chamber of oul.

.device. Fig. '3 is a vertical cross-sectional view of the regulating valve of our device. Fig. 4 is a similar view of the'safety out off valve used upon our device.

' In the accompanying drawings, forming .speciiioation of Letters Patent.

v S. Moonsand J OHN W. MooRE, citi-zens of theUnited 1 States, residing atLexington, in thei-county of Fayette and-State of Kentucky,;have: inf ventedcertain new, and useful Improye}; mentsin Devices for Mixing Air and Gas;

. gas main by I VICE FORMIXING- inn AND Gas;

. Patented June'21, 19x9;

App'licatibn filed Ai g ust 17; 1909. Serial No. 513,356.

preferred embodiment'of our invention .15

apart of thisspecificatiomand in which the disclosed, 1 designates a. cylindrical 'vertically" arranged mixing chamber provided 'withthe caps Zand 3 at the upperand lower ends thereof respectively.- The caps 2 and "3 are screw-threaded? ;u on the mixing. -chamberll, as shown-in Fig. .2. 1 The pipes .ihas oneend thereof screw-threaded into the cap 2 and extending vertieally and downwardly is providedwith the base'member 5; Near the base; 5, pipe i is provided with the air'inlet-ji, above and Iiear-which is the valve which w as a? m n [of manually s g h fl wf. air intothe mixing chamberv Efllre pipe .:8 is 'se'rewethreaded into the cap. 3 upon-the upper-end oflthe mixing chamber, and establ1shes.-communi-' cation betweenlsaid'chamber and a rotary blower fora purpose hereinafter to. be described.

10 designates a' as nieter o fla wellknown form, through whichthe gas passes from the means "of'pipes 11 and 12 to the mixing chamber-1. V

ing an air-tight receptacle within the body portion 14. Near the upwardly extending partition 18 upon the partition 17 there is arranged the opening 19, which servesas a valve seat for the downwardly opening valve 20, hereinafter tolbe'described.

The body portion 14 of the valve 13 is provided at its lower end with the outwardly extending flanged portion 18, beneath which is arranged the edge" of the flexible diaphragm 19'. Below the dia hragm 19 is secured an end "plate 20 whic is secured to the flange 18 by the bolts 21; thus the diaphragm 19 is securely held in place and k also serves as a-Qacking between the plate 20 and flange l for forming anair-tight joint. The cylindrical casing 21 has its open upper end screw-threa'ded into the end plate 29, at a central point, as shown at 22,

and has its lower. end closed by means of the Y plug 23.

screw-threaded portion'30, which .is threaded The downwardl opening valve 20, above referred to is rigi 1y mounted upon the stem 24, which passes through the dlaphragm at a central point and is rigidly secured thereto, by any suitable means, as shown at 25.

The stem 24 extends downwardly below the diaphragm 19 and is provided at-its. extremity with the enlarged apertured portion 26, within which is secured the upper end of a retractile coil; spring 27, which has its lower v end secured to the bracket 28 which is loosely mounted upon a tension regulator comprising a spindle 29, provided with the in the plug 23, as shown in Fig. 3. A wheel 31 is rigidly mounted upon the spindle 29,

2 and serves as 'a means whereby said spindle may be rotated for the adjustment of the tension-of spring 27. Spring 27 is adapted to normally maintain the valve 20 in an unseated position, as shown in Fig. 3.

Near the lower end"of .valve 13- is the threaded flanged openin 32 whichis adapted to receive the end 0. a pipe,hereinafter to be referred to.

- A safety valve 33 is arranged between the regulating valve 13 and the gas meter 10.

The upper body portion 34 of- Valve 33 is divided into the upper and lower chambers 35 and '36;respectively, by means of the diagonally arranged artitions 37 into which chambers sections 0 the pipe 12 are secured as at 37". The partition 37 is provided with the centrally arranged opening 38' which serves as a valve seat for the upwardlyopening valve 39 rigidly mounted upon the reciprocatoryflstem 40, hereinafter to be described. A section of a pipe 41 has its upper end screw-threaded into the lower portion of the upper body portion- 34at 42,- and the lowerportion thereof is screw-threaded The end plate 46 is provided with a screw into the bell-shape casing 43 at a point centrally thereof at 44. The bell-shape casing 44 has' its edge bent horizontally to form the flanged portion upon which is arranged the edge of the flexible diaphragm 45.v Be-' low said diaphragm 45, the end plate 46 is arranged in engagement with said dia-= phragm and has its edge secured ,to the flanged edge 44 by means of the bolts 47.-

threaded flanged opening 48 centrally thereof, into which a pipe is secured, for a pur-,,

pose hereinafter to be described.

The stem secured to the upwardly opening" valve 39, above referred to, is slidably mounted through an air-tight bearing 49 rigidly secured upon'the internal surface 'of said pipe section 41, and passes downwardly and has the lower end thereof rigidly secured to the central portion of the flexible diaphragm as at 50. A spring 51 is arranged around the stem 40, between to the manner in which the air being mixed.

the bearing 49 and the diaphragm 45, and

being under compression tends to maintain valve 39 in its seated position as shown in Fig. 4.

The pipe' 12 'extendswithin the mixing chamber 1 as, at 52, and is provided with the upwardly bent end 53, as clearly shown in Fi 2.

is above stated, communication is established between the blower 9, which may be the mixing chamber 1', by means of the pipe 8, which communicates with the chamber 1 at the top and with said blower at the top and at one side thereof, as at 54. A'pipe 55 communicates with the blower upon theother side thereof at 56, and is adapted to conduct the mixed fuel introduced into said any preferred. form of rotary blower, and

blower from pipe 8, to a rotary ironing machine, for heating the rotary irons 58 through the branch pipe 59. The mixed fuel may beconducted to any form of burner,

through another branch pipe 60,. as illustrated at 61. The rotary ironing machine 57 and the burner 61, form no part of our invention but are only shown for the sake of illustration.

A return pressure pipe 62, receives its pressure from pipe 55 by means of the joint 63' and communicates with the lower portion of the regulatingvalve 13 by means of the branch pipe 64 as at 32, while the branch pipe 65 establishes communication between the return pressure pipe 62 and the safety valve 33 at the lower portion thereof, as at 48. Upon one end of the return pressure pipe 62 is arranged the mercury gage 66,

which indicates the amount of pressure 1 to explain the operation of the same.

Assuming the blower 9 to be at rest, there will be no pressure in pipes 55 and 62 and the regulating valve 13 will be open to its limit and the safety valve 33'will be closed to prevent the escape of the gas as shown in Figs. 3 and 4. It is to be understood that the compressed spring 51 in the safety valve is a great deal slighter and more sensitive than the retractile spring 27 in the regulating valve, and that it requires a very little pressure upon the diaphragm 45 to move valve 39 to the limit of its open position. Upon the operation 'of the blower 9, air is drawn in through the inlet 6, into the mixing chamber 1, and forced through. pipe 55 to the burners. The burners are always 0 en or turned on, and the blower 9 is rotate at such a speed that it can maintain a presmaintain its normal open position, on account of the greater strength of the sprmg 27 over spring 5L Thus it will be seen that gas will be drawn into the mixing chamber, the same mixed with the air, and thence to the burners, where it is at once ignited. As the blower increases in speed to obtain the rate at which the same is constantly rotated, the

pressure increases in pipe 55 and the same is conducted to the regulating valve 13 and tends to close the same. If the mixture of air and gas contains too much gas, the oxidation at the burners will be imperfect, and the pressure increased in pipe 55. This causes a rise of valve '20, thus diminishing the volume of gas, and regulating to a nicety the proportion of gas to be admitted. If there is a too great amount of air, the oxidation of the gas will be very rapid at the burners, which creates a vacuum below the flame, and therefore would greatly reduce the pressure in pipe 55, which in turn would open the regulating valve to admit of a greater ,fiow of gas. It will thus be seen that the regulating of the relative volume of air and gas is entirely controlled by the pressure maintained in the pipe, which conducts the mixture under pressure to the burners, and that this pressure is regi ited by the manner of the oxidation of the gas.

It is obvious that should the blower accidentally stop, that the safety valve would cut off the supply of gas. and should the burner be put out. and the blower still continue to operate, that the pressure would increase in pipe 55, and close the regulating valve thereby cutting off the supply of gas.

Having fully describ d our invention, we claim:

1. In an apparatus of the character de scribed, the combination with a blower mechanism adapted tobe operated at a constant speed, and a suitable burner, of a receptacle having conm'lunication with said blower mechanism and within which air and gas are mixed before the same are fed to said burner, said receptacle having means associated therewith to admit the entrance of air therein. means of communication associated with said receptacle for supplying gas thereto from a suitable source, means of communication associated with said blower mech: anism and said burner for supplying the mixed air and gas under pressure, to said burner, a valve mechanism associated with said first named means of communication and adapted to regulate the supply of gas into said receptacle, means of communica'- tion between said last named means of commumcation and said valve mechanism for actuating said valve mechanism as the pressure in said second named means of communication varies, a safety valve mechanism associated with said first named means of communication, and having means of communication with said second named means of communication, said safety valve mechanism being adapted to normally remain in open position and to automatically close when the pressure in said second named means of communication falls below a'predetermined limit, substantially as described.

2. In combination, a burner, a rotary blower provided with a pipe communicating with said burner, a mixing .chamber provided with a pipe communicating with said rotary blower, a pipe communicating with said mixing chamber and a suitable fuel supply source, a valve arranged upon said last named pipe for regulating the supply of gas, a second valve arranged upon said last named pipe for cutting off the supply of gas when said rotary blower is at rest, a pipe establishing connnunication between said first named pipe and the controlling diaphragms of said valves, and said second named valve being adapted to be more easily actuated than said first named valve, substantially as described.

3. In combination, a burner, a rotary blower provided with a pipe communicating with said burner, a mixing chamber provided with a pipe communicating with said blower, a pipe communicating with said mixing chamber and a suitable gas supply source, an adjustable valve arranged upon said lastnamed pipe, a second valve arranged upon said lastnamed pipe, each of said valves being adapted to be actuated by a diaphragm, said second named valve-being adapted to be more easily actuated than said first named valve, and a pipe communicating with said first named pipe and the diaph 'agm of each of the said valves, substantially as described.

In testimony whereof we aiiix our signatures in presence of two witnesses.

CLARENCE S. MOORE. JOHN lVILLIAM MOORE. \Vitnesses TI-Ios. W. Rosa, G. T. Rosa. v

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