US1214880A

US1214880A - Gas-torch.

Info

Publication number: US1214880A
Application number: US77714913A
Authority: US
Inventors: Eugen Becher
Original assignee: BLAUGAS Co OF AMERICA
Current assignee: BLAUGAS Co OF AMERICA
Priority date: 1913-07-03
Filing date: 1913-07-03
Publication date: 1917-02-06
Anticipated expiration: 1934-02-06

Description

E. BECHER.

GAS TORCH- APPLICATION FILED JULY 3. 1913.

Patented. Feb. 6, 1917.

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,EUGEN BECKER, OF NEW YORK, N. Y., ASSIGNOR T0 BLAUGAS COMPANY OF AMERIO.A, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

GAS-TORCH.

Specification of Letters Patent.

Patented Feb. d ll-91W.

To all whom it may concern:

Be it known that I, EUGEN BECHER, a citizen of the German Empire, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Gas- Torches, fully described and representedin the following specification and the accon1 panying drawings, forming a part of the same.

This invention relates to gas burners, and more particularly to gas torches of the type used, for example, in brazing or in removing paint by burning it off a painted surface. The object of the invention is to provide an improved torch which, after once being lighted, may be used as required with a full operating supply of gas to the burner, and which will continue toburn with a small pilot or relighting flame after gas supply has been cut off.

. In many operations it is necessary to apply heat to a localized surface in the shape of a relatively small and intensely hot flame directed against the surface to be heated. This is the case for instance in brazing, and in burning paint ofl from a painted sur- In such operations it is convenient to employ a gas torch in which a fuel gas is supplied under pressure to a suitable blast burner designed to produce the hot sharp flame required for this class of work.

It very often happens, and particularly in the instances above mentioned, that a gas torch is used more or less discontinuously,

the flame beingerequired for periods of time separated by intervals during which the torchis idle. To permit the torch to burn full blast during these intervalsof rest, as 1s quite common in practice, means excessive waste of fuel; while, on the other hand, to cut off the gas supply and extinguish the flame necessitates re-lighting the flame after each idle interval, an annoying and time consuming operation.

It has been proposed heretofore to provide a torclfwith' an auxiliary and continuously open gas supply feeding a small separate jet or pilot light arranged to burn in proximity to the burner and to ignite gas issuing therefrom when the main gas supply is opened. Such proposed devices have not proved wholly satisfactory in practice, however, for the reason, among others, that when the main gas supply is opened, the sudden rush of gas from the main burner orifice very often blows out the small flame, rendering it necessary to relight the torch by hand in the usual way. Moreover, such an arrangement is more or less clumsy since it requires a special gas supply and other additional parts for the pilot burner or jet, and in general complicates the construction of the torch.

In the present invention I avoid, the difficulties above stated and provide a torch of extremely simple construction which, after once having been lighted, may be operated with a strong blast flame intermittently, the major portion of the gas supply being cut off during intervals of non-use and the blast flame being ,re-formed with certainty and prplmptness when the gas is again turned on To the above ends, the present invention comprises a suitable burner ,of the Bunsen type provided with a gas supply conduit in which is located a cut-off valve arranged so that it may be held in a position permitting ample flow of gas under pressure to theburner when the latter is being used, while, when the burner is to be temporarily out of use, the valve returns to a position where it cutslofl' nearly all of the gas flow but permits a relatively minute portion of the gas to continue flowing to the burner, the

amount of this restricted flow being suffi-- torch, parts being broken away and in sec-' valve and accompanying parts;

Fig. 3 is a view of the valve casing with the valve and closing'cap removed and showing the valve seat.

prises a burner having a shell or flame tube 1, a gas supply pipe 2, a manually operated controlling valve inclosed in a casing 3, and a handle 4 through which gas may be supplied from any suitable source such as conduit 5.

Fig. 2 is a detail sectional view of the Referring-to the drawings, the torch com-.

The burner is best of the type known as a flash-back Bunsen burner. It is' provided near the base of the'shell or flame tube with air inlets 6, and has a gas nozzle 7 whichas shown is formed by the end of the supply pipe 2. The end of the pipe is threaded and extends through a threaded central orifice.

in the base of the burner shell and is locked to the shell by a nut 8. In the end of the,

tube 2 is a plug 10 having a rather fine channel or pin hole extending therethrough for the passage of a jet of gas under pressure. It is evident that the position of the nozzle, or plugged end of the tube 2,-relative to the orifices 6 in the burner shell may be varied as desired by screwing the shell up or down on the threaded supply tube and looking it in place with the nut 8. U

The valve casing 3 is formed with internally threadedfextensions 12 and 13 to connect respectively with the supply tube 2 and the hollow handle 4. Extending transversely through the valve casing is a channel 1 L which opens at the left in Fig. 2 into a valve chamber 15, a raised annular valve seat 16 encircling the channel 14 at the point where it enters said chamber. The

inner Walls of chamber 15 are threaded to a stem 23 the inner part of which is of a diameter somewhat less than that of channel 14.' .The outer portion of the valve stem is 1 of a size to move in channel 14 with a close sliding fit and extends through a packing chamber 24 and threaded collar or gland 25.

A valve operating handle or lever 26 is pivoted at 27 to contact with the projecting end of the valve stem so that by pressing on the lever the valve stem will be forced inward and the valve opened against the pressure of its retaining spring.

A passage 30 connects the interior of the outer extension 12 of the valve c'asing with the transverse channel 14, while a passage 31 similarlyconnects the'interior of the extension 13 with the chamber 15. When the valve is lifted from its seat free communi-' catlon for flow of gas is established from the innerto the outer side of the valve casing.

In orderthat the flow of gas shall not be completely cut oil when the valve is seated, the annular valve seat 16 isprovided with a small notch 32 which permits-the flow of enough gas to supply a small flame at the burner orifice 11. It is obvious that provision for slight flow of gas past the valve going description.

might be made in other ways. The arrangement shown, however, is very simple and works well in practice. It'has, moreover, the advantage that the repeated seating and unseating of the valve, together with the consequent variations in velocity of the gas sweeping over the edges of the valve seat, tend to keep the small notch or groove clean and prevents its accidental stoppage.

The method of operating the gas torch above'described will, be clear from the fore Gas under pressure is supplied from any suitable source through conduit 5. Upon grasping the handle of the torch and depressing the operating lever 26, the controlling'valve is lifted from its seat to' permit a practically unrestricted flow of gas to the burner nozzle, whence the gas issues in a fine jet at high velocity.- Alr entering through the openings in the base of the burner shell or chimney mixes with the gas to give a combustion'mixture wluch is readily lighted atthe end of the burner.

The quality of the flame produced may be varied to a considerable extent by adjusting the position of the burner shell vertlcally on the gas supply pipe, and 1t may sometimes be desirable also to provide means for varying the quantity of air admltted at the inlets. The quality of the flame having The small notch in the valve seat, however,

permits the continued flow of enough gas through the supply pipe to keep alive a small flame at the gas nozzle. It is to be understood that when the burner is in operation, the flaine does not burn directly at'the nozzle orifice but that combustion begins toward or near the outer end of the burner shell. When the main supply of gas iscut off, however, the velocity of the outgoing gases is so much reduced that the flame travels or flashes back to the nozzle orifice and burns there quietly as a small. pilot been adjusted'to suit the character of the flame fed by the gas allowed to pass the closed valve.

It is to be understood, of course, that when the torch is tobe out of operation for any great-length of time, the gas supply may be' completely out oif by closing a suitable valve, (not shown,) in supply conduit 5.

The arrangement described, while particularly useful in connection with gas torches constructed to operate under rather high gas pressures, may also be applied .under some conditions to gas burning -devices of other types. I consider the invention, however, of' particular applicability naia eso to torches and as finding in this field its greatest practical utility.

What is claimed is:

1. A gas torch comprising in combination a blast burner comprising a tubular shell open atone end and having an air inlet opening and a gas nozzle for discharging a jet of gas within and directed toward the open end of the shell, a tubular rod by which the burner is carried and through which gas is supplied to the burner, a handle connected to said rod, and cut-ofl' means for controlling the flow of gas through the tubular rod to the burner having an operating device adjacent the handle, said means being formed to permit when operated to shut off the torch flame a small flow of gas through the tubular rod to the burner to burn with a small flame at the nozzle within the burner shell to serve as a re-lighting flame when the full flow of gas is again established.

2. A gas torch comprising in combination a blast burner comprising a tubular shell open at one end and having an air inlet opening and a gas nozzle for discharging a jet of gas within and directed toward the open end of the shell, a conduit for supplying gas to the burner, and cut-ofl means for controlling the flow of gas through the conduit to the burner formed to permit when operated to shut ofi the torch flame a small flow of gas through the conduit to the burner to burn with a small flame at the nozzle within the burner shell to serve as a re-lighting flame when the full flow of gas is again established.

3. A gas torch comprising in combination a blast burner comprising a tubular shell open at one end and having an air inlet opening and a gas nozzle for discharging a jet of gas within and directed toward the open end of the shell, a conduit for supplying gas to the burner, and a valve and valve seat in said conduit for controlling the flow of gas therethrough, one of said last mentioned members being formed with a notch or groove to permit a restricted flow of gas between said members into the conduit when the valve is seated whereby a small flame is maintained at the nozzle within the burner .gas between the valve shell to serve as a re-lighting flame when the full flow of gas is again established.

4. A gas torch comprising in combination a blast burner comprising a tubular shell open at one end and having an air inlet opening and a gas nozzle for discharging a jet of gas within and directed toward the open end of the shell, a tubular roCl by which the burner is carried and through which gas is supplied to the burner, a handle connected to said rod, and a valve for automatically reducing the flow of gas through the tubular rod to a predetermined minimum, and operating means adjacent the handle whereby the valve may be operated to permit the full flow of gas through the tubular rod to maintain the torch flame.

A gas torch comprising a gas burner, a pipe for supplying gas thereto, a valve and a valve seat in sa'ol pipe, and a resilient member for holding the valve against the seat in closing position, said valve and seat being formed to permit a restricted flow of gas between the valve and the valve seat into the conduit when the valve is seated, whereby a small flame is maintained at the burner to serve as a re-lighting flame when the full flow of gas is again established, and means for unseating said valve to permit free flow of gas through the pipe.

6. A gas torch comprising a burner, a conduit for supplying gas thereto, a valve in said conduit, and a valve seat for said valve formed to permit a restricted flow of and the valve seat into the conduit when the valve is seated.

7. A gas torch comprising a burner, a conduit for supplying gas thereto, a valve in said conduit, and a valve seat arranged to be engaged by said valve and provided with a notch or groove, whereby a restricted flow of gas between the valve and the valve seat into the conduit is permitted when the valve is seated.

In testimony my hand in the witnesses.

whereof I have hereuntoset presence of two subscribing EUGEN BECHER. Witnesses:

ARTHUR S. WELLS, J osm L. OCONNE'LL.