US1448530A - Automatic cut-off for fuel of oil-burning boilers - Google Patents

Description

Mar. 13, 1923., 1,4485%,

' P. H. GENTZEL.

AUTOMATIC'CUT-OFF FOR FUEL OF OIL BUR NING BOILERS.

FILED NOV. 17. 1919. 2 SHEETS-SHEET 1.

gwuww o Perm] Hfien'igea.

Mar. 13, 1923. 1,4485%, P. H. GENTZEL.

AUTOMATIG-CUT-OFF FOR FUEL OF OIL BURNING BOILERS. F lLED NOV. 17. 1919.

2 SHEETS-SHEET 2.

Boiler NWL 25 vention UNlTllll) STATES FFECCEO PERRY H. GENTZEL, 01E NEWTON, NASSACHU$ETT$ AUTOMATIC CUT-@FF FOB FUEL F OIL- BURNING BOILERS.

Application filed November 17, 1919. Serial No. 338,756.

To all whom it may concern:

Be it known that I, PERRY HOMER GENT- ZEL, a citizen of the United States, residing at Newton, in the county of Middlesex and State of Massachusetts, have invented certainnew and useful Improvements in Aut 0matic Cut-Offs for Fuel of Oil-Burning Boilers, of which the following is a specification.

The object ofmy said invention is to provide a means whereby the flow of fuel to the atomizer burner of an oil-burning boiler will be automatically cut off when the water in the boiler has reached a predetermined low water level, thereby automatically extinguishing the fire and guarding against explosion, burning of boiler tubes, and other damage.

Referring to the accompanying drawings,

at which are made a part hereof, and on which similar reference characters indicate similar parts, I I Figure 1 is a side elevation of an automatic control device embodying my said incertain portions being shown in section to illustrate the construction more clearly,

Figure 2', a top or plan view, and Figure 3, a horizontal section on the CD dotted line 3--3 in Figure 1.

Figure 4c is a fragmentary view of the upper end of the control device showing the parts in section.

Fggure 5 is an organization view showing 5 the control device in relation to the boiler,

burner and fuel supply.

In said drawings the portion marked A represents the supporting base, B a block, and C tie-rods, which several parts constitute the frame of the device.

Secured to head block A is a casting D 'containing parts andchambers for a purpose to be presently described.

Said base A has a boss on its upper face, formed with a central perforation, in which is mounted a tube 11, preferably of copper or other metal readily expansible by heat, which tube has a head 14 which fits slidably in a central perforation 14 formed in the head block B. The central portion of said pipe or tube ,11 is surrounded by a jacket 12 of steel or other stitl" material for the purpose of maintaining said tube in true alignment and preventing buckling regard less of temperature.

Said head blockit is also formed with transverse port 13 communicating with tube 11 and also with a pipe leading to the boiler as shown at 23 in Figure 5.

The upper end of tube 11 carries the head It adapted to press against a diaphragm 15 mounted over a perforation 16 in casing part D which connects with the fuel supply. Another perforation 17 leads from said casing D and connects with the pipe leading to the burner 0r atomizer. An annular flange 18 within casing D surrounds the lower end of perforation 16, against which the diaphragm 15 is adapted to seat under expension of tube 11 and close the passageway from perforation 16 to perforation 17 and cut offthe supply of fuel. A coiled spring 19 serves to hold the diaphragm away from said seat and maintain an open passage-way under normal conditions.

In operation the tube'll is normally filled with water to the normal waterlevel in the boiler, and under such conditions the parts are maintained in the relative position shown in Figure 1 with the passage-way for the flow of the liquid fuel open. hen, however, the water in the boiler falls to a level on a plane with the opening 13, the water in the tube will fall below said opening permitting the steam from the boiler to The tie-rods Q preferably pass through perforations in the sides of the base block A and have nuts 20 on their lower end, between which said base block are interposed heavy coiled springs 21, which normally hold said base block against jam nuts 22 on said rod C above said base block, thereby providing a certain amount of elasticity in the operation, which can be regulated by the adjustment of nuts 20, which will vary the tension of said springs 21 and provide for any extra expansion of tube 11, as will be readily understood.

in Figure 5 the legend indicates the normal water level and LWL the lowest water level to which water will normally be permitted to fall orior to automatic re- L Should, however, the water level continue to llllll res ll ll connection between the boiler and the block A will be exposed to steam from the boiler which will cause the control device to operate to cut off the oil supply to the burner as above described.

Having thus fully described my said in vention, what I claim as new and desire to secure by Letters Patent, is:

1. A device for automatically cutting ed the flow of fuel of an oil-burning boiler when the water reaches a predetermined level in the boiler consisting of a frame, a head carried by sald frame and formed with ports for connection with the oil supply and with the burner, said ports being formed to normally communicate with each other,

a diaphragm mounted over the end of one of said ports, a spring for normally holding said diaphragm away from said end to maintain communication between said ports, an expansible tube mounted benea'th said diaphragm and arranged to support and operate the same, and a connection from said tube to the boiler at the predetermined low Water level therein, whereby when said level is reached steam will enter said tube and expand the same and operate to force said diaphragm against the end of the port and close the fuel passage way to the burner, substantially as set forth.

2; The combination with an oil burning boiler of a device for controlling the'fiow of liquid fuel to the burner thereof, comprising a thermostatically controlled oil cham-' predetermined low water level a'device for controlling the flow of liquid fuel to theburner thereof comprising a thermostatically controlled oil chamber interposed in the fuel oil supply pipe, said oil chamber having a diaphragm which forms a floor for the said oil chamber and an, annular flange against which. said diaphragm is adapted to seat, a head adjacent the diaphragm erated means for operatlng on the head when the predetermined low water level is reached for forcing the diaphragm against the annular flange to cut off the'oil'supply, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Boston, Massachuand steam opsetts, this 2nd day of September, A. D. nineteen hundred and nineteen.

PERRY H. GENTZEL. [Ls] 'Witness: I

E. W. Bnanronn.

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