USRE16339E - Safety valve fob oil burners and the like - Google Patents

Description

Re. 16,339 i May 4 192s.

7 I... G. DANIELS SAFETY VALVE FOR OIL BURNERS AND THE LIKE Original Filed Jan. 17,1922

Reissued May 4,1926.

UNITED STA LEE G. DLNIELS, OF ROCKFORD, ILLINOIS.

SAFE'I'Y VALVE FOB OIL BUBNEBS AND THE LIKE.

Original I0. 1,524,914,

T011 whom, it may concern Be it known that I, Lun G. DANIELS, a citizen of the United States, residing at Rockford, in thexcounty vof Winnebago and State of Illinois, have invented certain new and useful Improvements in Safety Valves for OilBurner's and the like, of which the following is a specification.

This invention pertaining in'general to valves, has more particular reference to safety valves especially adapted for use in connection with oil or other liquid fuel burners. These burners are extensively used in domestic furnaces and heaters, and in the event that the flame .is accidentally extinguishcd and gravity or other constant flow feed isemployed, the fuel will overflow. This overflow is exceedingly dangerous by reason of the combustible nature of the liquid fuel, and'in any event will cause property damage. p .f v

The primary objectv of the present invention is to'provide a simple, an novel valve device which will positively shut off the fuel supply 'ifthe flame in the burner is extinguished, and to this end, I utilize the overflow in the burner action. 7 v

My invention contemplates the provision of a valve which will operate with absolute certainty andwill be dependable under all conditions and will not be affected by changesin temperature or humidity, or by the surroundings in any particular place or of the character 2 Q cost, and which use, which by .reason ofdampn'ess,etc., impair-and sometimes render inoperative prior devices provided for the purpose of shutting off the fuel supply under the conditions mentioned. I I Another object is to provide a'sa fety valve described embodying but few parts constructed in a simple manner so as to'becapable of roduction at a small function in a novel manner, insuring certaintyof operation, as will be ex lained more fully hereinafter.

their objects and attendant advantages v will be appreciated by those familiar wlth the accompanying drawings,

this artas the invention becomes better understood by reference to the 'following'description when considered in connection with in which- Figure 1 is a side elevation, partly in section, of an oil burning he ter or furnace for initiating the shut-off dated February 3, 1926, Serial No. 529,323, filed January 17, 1822. Application 101' reissue filed Hoveinber 13, 1325. Serial No. 68,323.

equipped with a safety valve embodying my I invent on;

Fig. 2, an enlarged view of the safety valve in the normal set position with the valve open; i

Fig. 3, a similar view with the parts tripped to the closed position;

Fig. 4 a View of the safety valve looking at the right hand side of Fig. 2, with the bucket removed; and

Fig. 5, a detail section taken substantially on the line 55 of Fig. 2.

In illustrating the use of my invention, 1 have shown merely in outline, a heater or furnace 6, equipped with an oil burner 7, to which is connected a fuel supply pipe 8 and an overflow pipe 9. The primary object of the present invention is to utilize the overflow through the pipe 9 (in the event that the burner flame is ex-tinguished) to automatlcally shut 011' the fuel supply.

In. the fuel'supply line there is mounted in any suitable manner, a shut-off valve and means for regulating the flow or feed of the fuel. In the present illustration, I employ a shut-off valve 11 and a regulating valve- 12, each of which may be of any suitable or preferred construction, it being observed that the manner of regulating or adjusting the feed is immaterial to the present invention. The shut-off valve shown, is of the globe needle valve type, including a valve stem 13, which when given a partial rotative movement in opposite directions, closes and opens the valve a'ssage. This valve is normally held open y means of a weighted arm 14, fixed to the valve stem 13 and held as shown in Fig. 2, at one side of the vertical plane or center of. the valve stem, by means of an intermediate stop and trip device, which will now be described.

This device consists of integrally formed lever arms 15 and 16,21. hub 17 and an extension 18 from the arm 15 provided with stops 19 and 21 adapted to abut against the casing of the valve 11. To the outer end of the leverarm'15 is suspended a bucket or any suitable receptacle 22. The lever arm 16 has a V-shapedv forward ed e 23 adapted to engagein a complemental face 24 in the arm 14, as shown plainly in Fig. 5. The

se ofthese \l-shaped faces is to maintain the bucket-carrying member or lever in a predetermined relation to the weighted arm and to hold the collar 17 of said bucket member against lengthwise displacement on the stem 13, thereby to prevent any binding.

or frictional contact between the ends of said collar and the faces of adjoining parts on.- the valve stem.

The arts described a' shaped and relative y arranged that the weighted arm will .be held in the normal open shown in Fig. 2 by reason of contact set osition with t e valve open, the flow or fee being regulated by the valve 12. As-

suming now that the flame in the burneris extinguished, the oil will overflow in the burner 7 andpass throu 'h the pipe .into the bucket 22. When t, .-;bucket'"is sufliciently filled, it will overbalance the weighted arm and drop to the position shown in Fig. 3, limited by the stop 21. This movement, however, of the arm 15 is not in itself stance the trip moves through proximately 60. degr I the function of the stantially ast sai utilized to shut oil the needle valve. It

merely initiates'the shut-oil movement in that it throws the weighted arm past the center of the needle valve and permits said weighted "armwto freely gravitate. The

weighted arm thus gains momentum and its greatest force is-exertcd in the act of finally closing the valve,

pressure is exerted during the initial spring movement. Consequently, in the present case the arm 15- may be stopped at any time after it has swun the weighted'arm sub- 5 center, and said weighted arm'wi 1 fall with increasing force so as to positively shut off the valve. The valveclosin movement may vary more or less accoring to the design and proportions of the particular valve, and in the present inan arc of a w ile that oft e weighted arm is approximately 120 de rees. In this example, the valve is completely closed when the weighted arm reaches substantiall the horizontal plane of the valve stem. owever, if a greater number of degrees should be required .for completely closmg the valve, there is availab e approxi mately 90 degrees in addition to the closing movement employed in the prescntexample. After the device has been tripped and the valve closed, it may be opened again simply by 'swingin the weighted arm to the set position an emptying the bucket as will'be obvious. It will be observed that-no s rings are employed in the construction an arts will not be imanges in temperature paired b reason of c or under severe condltions such or humi ity,

' also be observed that this construction pgsition tween the faces 23 and 24 andbetween the stop 19.

as distinguished from a direct spring action in which the greatest tion of a v that 1 as the presence of heavy dampness, which invariably is inimical to positive operation :mg to' function at the critical time. It will allows of a maximum valve opening equal substanadiustm' ent' valve 12.

t is believed that the foregoing conveys a clear understanding of the objects refaced above, and while I have illustrate but a single workingembodime'nt, it should be understood that considerable change might be made in details. of construction "without departing from the spirit and scope of the invention as expressed]. in the appended .claims, in which-' I claim:

1. In a ligluid fuel supply, the combination of a ,v ve having a'horizontally disposed oscillatory valve stem, an arm fixed to said stem and equip ed at its outer end with a weight, a receptac e adapted to be filled by overflow of the liquid fuel, a lever loose on the valve stem and end said receptacle, stops for limiting oscil-' lation of said lever in op osite directions, and means actuated b saul lever for tilting said weight-equippe arm from a valve tially to the maximum opening of the hand carrying at its outer I said weight-e uipped arm having a closing -movement un er the action of the weight subsequent to the closing movement of the receptacle lever.

2. In a l' uid fuel supply, the combineve having a horizontally disposed oscillatory valve stem, an arm fixed to said valve end with a be filled by overflow of t lever loose on the valve stem and carrying at its outer end said receptacle, stops on said lever for limiting its oscillation inopposite directions, and means actuated b said lever for tilting said weight-'equippe arm from a valve opened position to a valve closin posltion, said means permitting the weigh equipped arm to move in a valve closing direction a greater number of degrees than said lever in the valve closinginovement.

3. The combination of .a' valve having a valve stem adapted by rotative movement to open and close the valve, a weight fixed to said valve stem and normally disposed above and at one side of the center thereof in an open position, an arm loose onthe valve stem and having stops for limiting oscillation in both directions and so co-operating with said stem andequipped at its outer weight that at one limit-it maintains the latter in' said open position, and a rece tacle suspended from the'onter end of and valve by the an (if n weight.

weight a rece tacle adaptedto' ile liquid fuel, a

' both directions and 1 its weight, a

' the uni ht le sides of aeenter to the first mentioned arm tion of a vs vs having an oscill 7 tion of 4.. The combination of a .valve havinga valve stem adapted by rotative movement to open and close the valve, a weight fixed to said valve stem and normally disposed above and at one side of the center thereof in an open position, an arm loose on the valve stem and having stops so co-operatin said-weight that at one limit it maintains the'latter in said open position, and a rece tacle' sus (led from the'outer 'end of and arm a apted by fillingto' throw said weight beyond said center, whereby to close the valve by the fall valve-closing movement of said arm be ng limited b another of its stops without interferi with continued fall of the weight whic fall com letes closing of the valve.

5. The combination of a valve having a horizontally disposed oscillatory valve stem, a weight eoeentrically fixedto said valve stem and adapted when thrown to difierent holdthe valve in opened and closed positions, a lever loose on the valve stem' and having a receptacle-carrying arm and a weight-actuating part andstops for limiting oscillation of the lever in opp'osite directions, and a reoe tacle carried by t e arrangement being such that when said receptacle is filled to a predetermined do the lever will be oscillated by the weig t of the rece tacle contents for tilting the weight beyon said center sition, permitting it to drop to a valve 0 osing position. 6. In a li uid fuel supply, he combina stem, a lever-loose on said valve stem an nipped at its outer end with a receptacle a apted to receive overflow of the liquid fuel and to fall a limited distance under second lever fixed to said valve stem and nipped with a weight adapted for closing t e valve, means whereby the receptacle lever will initially move the weight lever in a yalve-closing direction, and means whereby the weight lever will have 'a valveclosing movement 5 its weight subsequent 7. In a liliuid fuel supply, the combinaunder-the momentum of to fall of said recepa vs vs having an oscillatory valve stem, a lever loose on said valve stem .an

nipped at its outer end with a receptaclea 'apted to receive overflow of the 'quid fuel, a second lever fixed to said valvestem and equipped with a weight adapted for closing t receptacle lever will the weight lever ina valve-direction and whereby ver r 'a'valve-cloein'g movement an neat to the the reeeptaclellsvar. I 8. a fuel supply, the combinao afu npplyhne,aehut-,6flva1vem closing movement of for limiting oscillation in with of said weight, the

'sai set position.

atory valve 1 said weighted member and adapted to be acd setting ofi a trip weighted member l d" anshereb th e n "tan ma y e from its saidset position and allow it 'with the shut-ofivalve open and adapted to be actuated by said means to release the weighted arm from its said set position and allow it to uel has been removed from said fuel-actuated means the weighted arm may be returned to saidset position and will by such return movement automatically reposition said fuel-actuated means and cause the said trip device to be "set in conjunction;- with the in its we' hted arm for retaining the latter 9. In a fuel burning system, in combination, a burner, a fuel supply line to tlres burner, an overflow or excess feed return pipe from the burner, a-valven the fuel pp y to beclosed by the action 'of a screw-thread connection, a weighted member adapted 'to be" normally held in a set position and to be released from said position by flow of fuel from said return pipe and being so connected with said valve as to seat its valve member by a closing movement increasing in pressure with the fall of the weight, and means having a releasable connection with tuated by fuel from said return pipe for releasing saidweighted member from its said set position, said means being adapted to be automatically reset by movement of the weighted member to its said set pos1tion.

fall and shut off the fuel supply, .and means whereby after the overflow line having a valve member adapted] too ' 10. A safety valve for oil burners comrising, in combination, a valve pro r having a valve-closing member, means ing said member by connection, a weighted member mounted to swing in a fixed-arc with said screw-thread connection and adaptabout acenter coaxial or seat- 7 action of a screw-thread ed to shut oi the valve by falling, means. 7

adapted to be actuated :byfoverflow fuel foidevice, and I": trip device operative between and said means to. norm y retain; the a set position with" the valve open and a apted' to be actuated by said means to release the weighted memxillto a and shut ofi the valve,- said'trip-device being adapted to'be-reset'by the act of return ing the weighted 11. A shut ofi valve for oil burners comprising, in combination, avalve proper a member to its normal set said we hted member" valve-closing member adapted to be closed by the action of a screw-t read connection, a weighted member normally in a set position and adapted to be released therefrom to operate said screw-thread connection and close said valve by a falling action, means adapted to be actuated by overflow fuel, and a trip device operative between said means and weighted member for retaining the lat-- ter in said set position and adapted to be actuated by said overflow fuel to release said weighted member so that it may function to shut oil the valve, said trip device being subsequently actuated by the act of returning the weighted member to its said set position to thereby reset and retain the weighted member in said set position;

12. A shut off valve for oil burners comprising, in combination, a valve proper having a, valve-closing member, a weighted member pivoted to swing in a fixed arc and adapted by falling to impart closing movement to said valve member, a trip device for normally retaining the weighted member in a set position and adapted to be actuated to release it from said set position so that it may fall and shut off the valve, and means adapted to be actuated by overflow oil for setting off the trip device, said trip device and weighted member being so cooperatively associated that by the act of swinging the weighted member to its said set position the trip device will be actuated bysaid weighted member to reset and retain it in the said set position.

l3;v A shut off valve for oil burners comprising, in combination, a valve proper ha ving a valve-closing member, a weighted member pivoted to swing in a fixed arc and adapted by falling to impart closing moveinent to said valve member, a pivoted trip over, lever and adapted to be actuated by overflow oil to initiate valve-closing movement of said weighted member, the weighted member being movable into another arm of said lever and adapted to be normally retained thereby in a set position with the valve open and to be released therefrom by operation of said overflow oil on said means to shut off the valve, the weighted member functioning inde endently of said trip lever after release tierefrom, said trip lever being so positioned with its second mentioned member in the path of said and outof contact with means connected to one arm of said a weighted member that the latter will be brought into contact with the former when returning to its normalset position and W1 retain the weighted member in said set po-- sition.

LEE G. DANIELS.

Images