US755060A - Time gas-lighting mechanism. - Google Patents

Description

No. 755,060. 'PAIENTBD MAR. 22,1904.

N. H. SHAW.

. TIME GAS LIGHTING MEGHANISM. APPLIUATIQH Hmm A rn. 14. 1903.

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PATENTBD MAR. 22, 1904. N. H. SHAW.

TIME GAS LIGHTING MECHANISM. APPLIQATION FILED APB. 14. 190s.

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UNITED STATES Patented March 22, 1904i.

NATHANIEL H. SHAW, OF BOSTON, MASSACHUSETTS.

TIME GAS-LIGHTING MECHANISM. l

SPECIFICATION forming part of Letters Patent No. 755,060, dated March 22, 1904.

VApplication filed April 14, 1903. Serial No. 152,544. (No model.) i

' Boston, county of Suffolk'State of Massachusetts, have made certain new and useful Improvements in Automatic Gas Lighting and Extinguishing Apparatus, of which the following is a description suciently full, clear, and

exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation showing the time mechanism on burner of my improved device; Fig. 2, a cross-sectionalview enlarged showing the connectionY between the burner and time mechanism; Fig. 3, a section on line 3 3 in Fig. 2, showing the main and pilot-valve operating mechanism; Fig. 4, asection on line 4 4: in Fig. 2, illustrating details; Fig. 5, a sectional view showing the pilot-duct gage, 'and Fig. 6 a face view of the tripping-disk.

Like letters and iigures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates more especially to automatic gas lighting and extinguishing mechanism for street-lamps using illuminating-gas, and particularly such as are supplied with a mantle or Bunsen or what is commonly known as a Welsbach burner. peculiar construction of such burners and the disposition of the protecting-lantern much difficulty has heretofore been experienced in so locating the device as to take the supply from the top of the pipe from which the burner projects vertically and interposing a valve mechanism operated automatically by a time mechanism which shall not interfere with the common or ordinary arrangement of the parts and yet shall prove effective in not obstructing the light rays in the lantern. My invention is designed to accomplish 'this in the simplest, cheapest, and most effective manner, and in carrying it outI makeV use of means which will be readily understood by those conversant with such matters from the following explanation.

In the drawings, A represents the casing of a clock or time mechanism which carries the Because of the by its base into the discharge-nipple 18.

works of aclock of ordinary construction, by

which is driven an intermediate gear b, mesh-- ing with a gear c, suitably journaled in said casing. On the rear face of this gear c project studs, (indicated by'do'tted circles on the face of said gear in Fig. 1,) disposed at determined intervals for the purpose of tripping or elevating the free end ofa counterbalanced lever e at predetermined intervals in the clocks course. On this lever e is pivoted to play vertically a hook-shaped bell-crank or pawl f, counterbalanced at g. l

Journaled in the case is a disk j, bearing on its outer face a series of studslc in position to be engaged by the hook f, wherebysaid disk may be rotated intermittently a determined distance. Of these studs alternate ones project rearwardly through said disk, formingv lingers Z.

A lever 7L, counterbalanced on its free end at 50, is pivoted to the rear wall of the casing A, with its long arm projecting into the path of these ngers Z, and a pitman-rod c' is pivoted to said long arm.

A casting, right angular 1n the present instance, but which may be of any requisite form, is provided with a nipple 17, whereby it may be attached to the top of the vertical supply-pipe usual in lamp-posts. This casting forms a gas-conduit H and is provided with a port or duct 19, leading laterally at right angles from the nipple 17, thence vertically downward, and again horizontally, whence it discharges into a gas-chamber B, bolted to the rear wall of the casing A. The conduit H is bolted to this chamber and serves to support the time mechanism on the post.

Opening through a partition in the top of the gas-chamber B are two valve-seats 20 and 25, connecting said chamber, respectively, with a discharge port or duct 22 and a pilotlight port or duct 15, formed in said conduit H and for convenience in parallelism with the inlet 19. The discharge 22 Vterminates-in a vertical nipple 18, directly above and in alinement with the inlet-nipple 17.

The burner D, which is of the ordinary familiar form ofburners of this class, is turned It has the usual head y for receiving the mantle a: and air-ports 16, covered by hood z, for admitti ng air to the mixing-chamber. Through this hood and head the pilot-light tube 15 is extended vertically from the conduit to discharge inside the mantle A gage screw or regulator 23 is turned through the end of the conduit and has its conical end projecting into the horizontal portion of the outlet-port 22, where it enters theJ discharge-nipple 18. By means of this the flow of gas to the burner may be regulated, as will be readily understood. A similar gage-screw 31 (see Fig. 5) regulates the flow in the pilot-pipe.

Fitted to slide in a tube q, projecting through the top of the gas-chamber B, (see Fig. 3,) there is a rod j), the upper end.of which is secured to an arm m, which passes through an opening in the rear wall of the clock-casing A and has-its end pivotally connected to the pitman The lower end of this rod p within the gas-chamber carries a shelf or bracket o, upon which is mounted a mercury-cup s, fitted to slide on tube q, theinner end of which projects into the mercury, whereby it is sealed against the escape of gas from said chamber.

The bracket fr carries a stem t, on which is a valve w, adapted to move vertically upward and be seated on seat 2O and cut off the fiow of gas from chamber B to the discharge 19. A similar stem 33 is arranged on the opposite end of bracket r and carries valve lv, fitted to engage the upper side of seat 25 and cut off the supply from chamber B to the pilot. The valves as thus adjusted are alternately opened and closed, the downward movement of rod p admitting the gas-supply to the main burner and cutting off that to the pilot and its upward movement opening the pilot and cutting off the main burner-supply.

As is well known, the lantern (indicated in dotted outline in Fig. 1) housing the burner of street-lamps is supported from the posttop, and its base transects the base of said burner, a torch hole or opening being formed in the base of the lantern. By means of the laterally-projecting conduit, which forms a gas-circuit between the supply and the base of the burner, only the horizontal upper portion of said conduit is inclosed in the lantern, said conduit dropping and supporting the time mechanism;` By this construction, which I deem a salient feature of my invention, I am enabled alsoto dispose lallvalve mechanism outside and below the lantern, the base of which is substantially horizontally across the nipple 17. I do not confine myself to the use of the time mechanisml shown or to the specific form of valve mechanism and the actuating devices described, as these valves Q: w may be mounted on opposite sides of the seats. The seal may be made to work above the top of the chamber and any suitable timeactuated device employed to operate them.

Moreover, the pilot-valve may be entirely omitted, if desired, and a continuous flow permitted from the chamber to the pilot-burner, which can, as its outlet is within the main burner, be allowed to burn at all times without greater consumption of gas than would occur should the pilot-supply be shut off when the main burner is ignited.

rlhe operation of the mechanism as shown is as follows: The clock being in action, at a predetermined time a stud on the gear o will engage the free arm of lever e, elevating the same and driving the pawl f upward until it overrides a stud c, the preceding finger Z having been resting on the end 'of lever /L and holding it depressed, as in Fig. 1, on the downstroke, and consequently holding the supplyvalve w open and the pilot-valve o closed, as in Fig. 3, with the main burner (in which gas has been ignited from said pilot) being in full operation. Now as soon as the stud disengages the lever e said lever descends by gravity, it being pivoted by its opposite end, carrying with it pawl f, which rotates disk] the distance between a linger Z and stud ,t and frees the lever /L from contact with the preceding finger, whereupon the counterbalance 50 at once drives the forearm of said lever 7L upward until stopped by the seating of the main burner-valve. At the time the pitmanzl is forced upward it opens the pilotvalve o, the burner of which is at once ignited, and consequently closes the supply-valve w and extinguishes the main burner. The opposite of this operation occurs at further course of the clock when Aa succeeding stud elevates lever e. The pawl f this time engages an alternate stud driving the lever L, already inl engagement while elevated with a finger Z downward and actuating the valve mechanism to assume the positions shown in the drawings with the main burner-supply open and the.4 lever e held depressed by the contacting finger Z.

Having thus explained my invention, what I claim isy i 1. In a device of the class described a burner; a gas-conduit connecting with the main supply adjacent its outlet, projecting laterally from said supply and returning to discharge into said burner; a valve interposed in said conduit: and a time mechanism for operating said valve.

2. In adevice of the character described the burner in combination with the angular conduit, H, projecting laterally and downwardly from the base thereofand provided with ducts 19 and 22 arranged substantially as specified: a valve connecting said ducts: and av time mechanism for operating said valve.

3. In combination, the burner, the gasehamber: the angular gas-conduit projecting laterally and downwardly therefrom and provided with the main and pilot-light vducts IIO opening into said gas-chamber: Valves interposed between said ducts within said chamber: and a time mechanism on said conduit for operating said Valves substantially in the manner specied.

4. The supply, the burner, the pilot-burner and the lantern housing the same in combination with the gas-conduit having ducts connecting said supply with said burners Within said housing and projecting laterally and downwardly therefrom outside said housing:

valves interposed between the supply and burner ducts: and a time mechanism on said conduit for operating said Valves substantially as described.

In testimony whereof Ihave aflixed my signature in presence of two witnesses.

NATHANIEL H. SHAW.

Witnesses:

O. M. SHAW, JOHN B. Moons.

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