US613648A - cortis - Google Patents

Description

N 6|3343.' Patented Nov. l, |898.

l F. A. CURTIS.

' LAMP.

(Application led Mar. 20. 1896. .5.. me Model.)

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NrrED STATES FRANK A. CORTIS, OF MERIDEN, CONNECTICUT, ASSIGNOR OF ONE-HALF TO DWIGHT T. CORTIS, OF BOSTON, MASSACHUSETTS.

LAM P.

SPECIFICATION forming' part of Letters Patent No. 618,648, dated November 1, 1898.

Application filed March 20, 1896. Serial No. 584,109. (No model.)

To all whom 15m/ay concern,.-

Be it known that I, FRANK A. CURTIS, a citizen of the United States, and a resident of Meriden, in the county of New I-Iaven and State of Connecticut, have invented certain new and useful Improvements in Lamps, of which the following is a full, clear, and exact description,whereby any one skilled in the art can make and use the same.

My invention relates particularly to the class of sO-called lamps which are used in the Welsbach system, where a mantle or veil of extremely fragile material is used, this mantle being brought to a high state of incandescence to provide the luminous body in the lamp. In lamps of this construction, owing to the fragile nature of this mantle, a jar or shock comparatively light in degree will cause the mantle, which is supported from 3o .a whole, and in the combination of such parts,

as more particularly hereinafter described, and pointed out in the claims.

Referring to the drawings, Figure lis a view in side elevation of a lamp embodying my improvement with parts cut away to show construction. Fig. 2 is a detail view, on enlarged scale, showing the cushion. Fig. 3 is a detail view, on enlarged scale, showing a modifled form of cushion and its arrangement. Fig-4 is a detail top or plan view of the airshutter and spring-cushion.

In the accompanying drawings my invention is illustrated in connection with a single lamp of the kind described, and the letter ct denotes a gas-bracket on which the lamp as a whole is supported. A feature of this form of lamp includes means for controlling the quantity of air which may be allowed to unite with the illuminating-gas before the latter is ignited at the upper end of the burner, and

this device, known as the shutter, is de= noted by the letter b. This air-shutter h is a hollow device, usually of thin metal, as brass,

with air-ports through the lower part adapt' ed to be closed to a greater or less degree by means of a sliding damper, and there is sufficient space within the body of this device and outside the central tube o, in which the air and gas are mixed, to permit the spring of an elastic cushion e to be arranged.

Prior to my invention the chimney-gallery f (which supports the chimney g, a mantle h, and in most instances a shade) .has been supported directly on top of the air-shutter, the mixing or central tube c extending through a central opening in the chimney-gallery, as shown in dotted line in Fig. l, which gallery is thus supported firmly in an upright position. When the parts are so supported, any jar given to the gas-bracket or other support for the lamp or the lamp itself is communicated di; rectly to the chimney-gallery and mantle-support and causes the mantle to break short off at the neck or upper portion, and thus become destroyed. In order to avoid this, a springA cushion or like elastic device e is interposed between the mantle-support (in this instance the chimney-gallery) and the bracket or part fast to Ythe bracket. The mantle 71. is supported usually from a loop formed on the upper end of a rod h', which rod is secured in a socket h2 in the chimney-gallery as by means of a clamp-screw, the head of which is shown at h3. In one form, as shown in Figs. 1 and 2, the spring c within the body of the air shutter supports a washer e2, from which rods e3, extending through holes in the upper part of the air-shutter, project upward and support a collar e4, on which the chimney-gallery is directly supported. The elastic cushion thus takes the whole weight Yof the chimney-gallery, chimney, and other parts and provides a support sufficiently sensitive to prevent any shock or vibration whatever from extending beyond the bracket tothe detriment-of the mantle.

The lower burner-tube c, which is rigidly secured to the support a, extends upward through the air-shutter and within the burner'- tube Z, that terminates in a cap lo', usually IOO having a perforated top,above which the flame extends when the lamp is lighted and over which the lower end of the mantle 72, drops, as shown in Fig. l of the drawings. This burnertube 7a has a free sliding movement up and down upon the tube c, limited in extent by the spring-cushioue. This upper section k of the burner-tube is sufficiently loose to enable the parts of the telescopic burner-tube to move freely, so as to support the mantle and insulate it from vibrations and shocks.

The modiiied form of my invention,as shown in Fig. 3, consists of a cushion in which the spring member t' is mounted between two collars t" i2, the lower collar 'i2 resting on top of the air-shutter and the collar i underlying the bottom of the cl1imney-gal1ery,no part of this being arranged or located Within the airshutter. This form of cushion is easily adapted to the present forms of burner and air-shutter Without requiring any change in their structure.

I claim as my inventionl. The combination in an incandescent gasburner, of a spring-support constructed to carry the mantle and prevent undue Vibration and shaking thereof, with a telescopic tubular connection for supplying gas Without interfering With the action of the spring-support.

2. The combination in an incandescent burner, of a bracket or like support for the lamp as a Whole, a telescopic burner-tube for supplying gas, a mantle-support, and a yielding cushion interposed between the fixed section and the movable section of the burnertube,whereby gas is supplied Within the mantle Without interfering with the action of the spring-support.

3. In combination with a bracket or like support for a lamp having a fragile mantle over the ame, an air-shutter, a yielding cushion located in the shutter, and the 1nantle-support resting upon the yielding cushion, all substantially as described.

4E. In combination with a bracket or like support for a lamp having a fragile mantle over the flame, an airshutter, an elastic cushion located Within the shutter, supports extending from the cushion upward through the mantle, and the mantle-support mounted on the supports from the yielding cushion, all substantially as described.

5. In combination with a bracket or like support for a lamp having a fragile mantle over the flame, an air-shutter, a spring l0- cated Within the shutter, a collar borne on the spring, supports extending upward from the collar through the Wall of the shutter, a collar secured to the upper part of the supports, and a mantle-support borne on said collar, all substantially as described.

6. In combination with a bracket or like support for a lamp having a fragile mantle over the llame, an air-shutter, a yielding cushion located in the shutter, a chimneygallery supported on the yielding cushion, and a mantle-support secured to the chimneygallery, all substantially as described.

7. In combination with a bracket or like support for a lamp having a fragile mantle over the iiame, a tubular connection between the support and the burner of said lamp, a mantle-support, and a yielding cushion interposed between the lam p-support and the mantle-support.

8. In combination in an incandescent burner, of a spring-support constructed to support a mantle and prevent undue vibration or shaking thereof, with a tubular connection for supplying iiuid Without interfering With the action of the spring-support.

FRANK A. CORTIS.

Witnesses:

GEO. M. CLARK, GEO. S. CLARK.

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