US1350589A - Time-retarded extinguishing device for gas-burners - Google Patents

Description

M. H. BAKER, DECD.

M. H. BAKER. ADMHHSTRATRIX.

TIME RETARDED EXTINGUISHING DEVICE FOR GAS BURNERS.

APPLlCATlON FHLED SEPT-10,1915. RENEWED NOV. 17. 1919.

1,356,5 Patented Aug. 24,1920.

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UNITED STATES PATENT OFFICE.

MALCOLM H. BAKER, OE BRAINTREE, MASSACHUSETTS; MARIE H. BAKER, ADMINIS- TRATRIX OE SAID MALCOLM BAKER, DECEASED, ASSIGNOR TO KENNETH W. CROSBY, TRUSTEE, F BOSTON, MASSACHUSETTS.

TIME-RETARDED EXTINGUISHING DEVICE FOR GAS-BURNERS.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application filed September 10, 1915, SerialNo. 50,075. Renewed November 17, 1919. Serial No. 338,526-

To all whom it may concern r Be it known that I, IVIALCOLM H. BAKER, a citizen of the United States, and a resident of Braintree, in the county of Norfolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Time-Retarded Extinguishing Devices for Gas-Burners, of which the following is a specification.

In another application filed by me, Serial No. 23,991 filed April 26, 1915, I have disclosed means wherebya gas burner may be retarded in extinguishment through the agency of thei'mo-dynamic means arranged, in alterable thermal relation to the flame of the burner, and while the said burner is operating at practically a normal size flame.

In the present application I makeuse of thermo-dynamic means which are arranged in fixed relation to the flame of the burner, while the said flame is of normal size, but which are actuated to produce extinguishment, after a predetermined period,-by the certain definite reduction in the size of the flame produced by the actuation of the ordinary turning off mechanism.

That is, in the present application I provide thermo-dynamic means arranged in fixed location with respect to the burner flame while the same is operating in a normal manner. And I arrange the key, or other valve control mechanism, of the burner, so that actuation of the same in the turning off manner merely reduces the flame a predetermined amount, while still retaining it of sufficient size to give a fair light. The thermo-dynamic means are then actuated by this specific reduction in size of flame and act to totally extinguish the light after a predetermined period.

It is thus evident that, while the thermodynamic means are still broadly in movable relation to the flame of the burner, as broadly disclosed in the above cited application, the said movable thermal relation is brought about in a different and specific maintenance of light for a brief period, say one to three minutes, after the usual extinguishing mechanism has been manually operated. As pointed out, such need is practically universal, the usual immediate darkness which follows the extinguishing act of lamps being of more or less inconvenience.

Otherwise expressed, the invention provides a gas burner which is turned on to be lighted in the usual manner. And which, further is turned ofl in the usual manner, but which does not cease to give light for a brief interval after such turning off action on the part of the user.

I have illustrated my invention in the annexed drawings, in which Figure 1 is a front elevation, partially sectioned, of my improved burner shown in normal operating position. Fig. 2 is a side elevation of Fig. 1. Fig. 3 is an elevation like Fig. 1 but showing the relation of parts just after the action of turning oil has been gone through but before the light has been extinguished, and Fig. 4 shows'the positions taken by the parts of Fig. 3 when the gas has been completely turned off by the thermo dynamic means. Fig. 5 is a perspective of a complete cased-in burner and bracket therefor.

In the drawings, 1 is the normal flame and 2 (see Fig. 3) the reduced flame. The burner tip appears at 3, the stem at 4, and the valve block at 5. An arm 6, formed of some highly thermal conductive material such as copper, is shown attached to a block 8 of similar material, which block carries a thermo-dynamic couple 9, arranged with the more expansible material outside, away from, the valve block. The lower end of this couple is turned in to form a catch 10, adapted to engage a portion 11 of the disk 12 carried by the valve proper 13. A second engaged and held in the valve open position by the catch 15 when the gas is turned on, that is, when the valve is opened,-which action is brought about by a pull on the cord 16 attached to the arm 17 which forms an extension of the said second disk 14:. A spring 18 is provided to control the catch 15, and a second spring 21, attached to the arm 17, acts to turn off the valve.

Operation is as foll0ws,-When the cord 16 is pulled the valve is rotated to the open disk 14 is also carried by the valve and is position where it is locked by the engagement of the catch 15 with the disk 14. The burner is now operated as long as desired, the relationof parts being as shown in Figs. 1 and 2.

WVhen it is desired to extinguish, the cord 19, attached to an arm 20 forming a portion of the catch 15, is pulled. This frees the said catch from the disk 1 1 allowing the spring 21 to rotatethc valve toward the closed position. In the meantime, however,

.the heat of the flame has bent inwardly the predetermined interval subsequent to the actuation of the cord 19, for the reason that,

notonly does the couple 9 itself require an 1 appreciable time to cool and bend outwardly, but also the. block 8 acts as .a reservoirof stored heat to oppose the cooling-of the said couple; By proper proportioning' of the size of the couple, amount of engagement of the catch portion .of the same with the disk 12, and the mass of the block 8, the

time element may be varied from some 20 seconds or so up to several mmutes, as may be desired.

The relation of parts at the time of'total extinguishment, and cooling of the couple 9,

is shown in Fig. 4c.

In order to facilitate the retention ofheat in, .and efficient conductivity of heat by, the

arm 6 I may partially jacket the same with some material such as asbestos, shown at 23, if I desire. 1

A suitable casing 24 is generally provided to protect-the parts from injury and to add attractiveness .tothe general appearance of the device.

It will be obviousthat many modifications of the mechanical means herein shown may be made without departing from the spirit of the invention, and, therefore, without .limiting myself to the precise form herein shown, WhatI claim is, g

.1. In a gas burnerstructure including a .gas supply control valve, in combination;

means to open the valve; means to tension the valve for automatlc closure; a latch adapted to hold the va'lveopen until manu ally trippedlto release the same ;.and thermodynamic means arranged to arrest the valve at a partially closed position for a limited intervaloftime after release by said latch.

2. In a ,gas burner structure including a gas supply control valve, in combination; means to open the valve; means to tension the valve for automatic closure; a latch adapted to hold the valve open until -manually tripped to release the same; and thermodynamic means arranged to be operatively controlled by heat from the said burner, thereby to arrest the valve at a partially closed position for a definitely limited inter-v val .of time after release by said latch.

3. In a gas burner including a valve therefor, means to open the valve; means to lock the said valve in an open position; means tending, when energized, to close the valve;

means to free the saidlocking means; and thermo-dynamicmeans, operated by the normal flame of the burner and adapted to arrest the valve at a partially closed position after said locking means have been freed; said thermodynamic means being further adapted to act to free the valve for complete closure as a result of reduction in flame produced by said partial closure;

it. In a gas burner including a valve therefor, means toopen thevalve; means adapted to close the valve automatically; means to lock thevalve in an open position ;.-means to free the said locking means; and a thermodynamic device adapted, when energized by the normal burner flame, to arrest the valve at .a partially closed position aftersaid locking means have. been freed; said thermodynamic device being further adapted to release the valve for full closure after the burner flame has been reduced by said partial closure. o

5. In a gas .7 burner including a valve therefor, means to open the valve; spring controlled means adapted to close the valve;

-a catch adapted to lock the valve in an open position; means to free the said catch; and a thermo-dynamic device adapted, when related to the normal size flame of the burner, to arrest the valve at a partially closed position'after said catch has been freed; the said thermo-dy-namic device being further adapted to free the valve. for complete closure thereof after the flame has'been reducedconsequent upon said partial closure of the valve.

6. In a gas burner including a valve therefor, means to open the valve; means tending to close the valve; means adapted toretain the said valve open; means to free the said retaining means; .a

thermostat mounted upon a base of thermally conductive material, and aconneetion of thermally conductive material fromsaid base to the flame of the burner; the said thermostat being adapted, when energized bythe :normal size flame of the burner, to arrest the valve at a partially closed-position after said retaining means have been freed; and being further adapted to free the said valve to perm-it fullelosure thereof when the flame has been reduced by said partial closure.

7. In a gas burner including a valve therefore, a thermostat, a base of thermally conductive material on which said thermostat is mounted, a member of thermally conductive material secured to said base and adapted to extend into proximity to the flame of the burner, and a jacket of thermally non-conductive material partially inclosing said member, whereby eflicient transmission or heat to said thermostat is attained.

In a thermostatically governed gasburner controlling arrangement, in combination; a spring connected when unrestrained to closethe valve ;--a device to open the valve; an auxiliary sp'ring-tensioned dog arranged releasably to lock the valve in the full open position thereof ;and a thermostatically controlled detent, positioned and arranged to be made operative by the normal flame of the burner to intercept the valve when released from full open position thereof and to hold it at a partially closed relative gas-reducing position thereoIf;t-hecooperative arrangement and positioning of the burner and thermostatic cleviee being further such that the burner flame limited by partial closure of said valve operatively cools the thermostat and permits automatic valve closure.

9. In thermostatically-governed gasburner valve closing mechanism, in combination; means operably independent of burner heat to lock the valve open and under tension tending when released to close it ;-a thermostaticallycontrolled detent operatively positioned when heated by the full flame of the burner to intercept the valve at a partially closed position and adapted upon diminution of the burner flame to release the valve for closing; together with auxiliary means independent of burner heat and arranged upon designed manipulation to release the valve from its fully opened position, to eflect said flame diminution.

10. In thermostatically governed gas burner valve closing mechanism, in combination; means operably independent of burner heat to lock the valve open and under tension tending when released to close it ;a thermostatically controlled detent structure, including heat-receiving and conducting means arranged proximate the burner and connected to the detent-governmg thermostat whereby the latter is operatively positioned when heated by the full flame of the burner to intercept the valve at a partially closed position and adapted upon diminution of the burner flame to release the valve for closing; together with auxiliary means independent of burner heat and arranged upon designed manipulation to release the valve from its fully opened position, to effect said flame diminution.

11. In gas-burner valve-controlling mechanism, in combination; a rotatable valve stem carrying secured thereto a control extension for opening the valve and spring adapted by the valve-opening movement of said extension to be tensioned for closing the valve; a spring actuated pawl lever arranged automatically to catch and hold said extension in the full open position of said valve, and adapted to be manually actuated to release said extension; a flexing thermostat formed and positioned for thermally caused movement into position for intercepting valve-closing movement of said extension; and heating means for said thermostat, comprising a heat-conductive member extending therefrominto heat-receiving relation to only the full flame of the burner whereby said thermostat is rendered operative to arrest the manually-caused, automatic, closing movement of the valve in a flame reducing position thereof, and whereby said flame reduction causes the thermostat to cool and release the valve for automatic, complete closure thereof.

12. In a gas burner structure including a gas supply control valve, in combination; means to open the valve; means to cause partial closure of the valve thereby to effeet a definite reduction of the burner flame; means to tension the valve for full and automatic closure; and thermo-dynamic means adapted to arrest the Valve in its partially closed position, and further arranged to be rendered active by said flame reduction to release the valve for complete closure a substantial interval of time thereafter.

Signed at Braintree, in the county of Norfolk and Commonwealth of Massachusetts this 9th of September, 1915.

MALCOLM I-I. BAKER.

Witnesses:

RAYMOND D. SMITH, SILvIo Arronoso.

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