US471507A - Horace craighead - Google Patents

Description

(No Model.)

H. GRAIGHBAD. CENTRAL DRAFT LAMP.

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HORACE CRAIGHEAD, OF BALLARD VALE, MASSACHUSETTS, ASSIGNOR TO THE CRAIGHEAD & KINTZ COMPANY, OF SAME PLACE.

CENTRAL-DRAFT LAM P.

SPECIFICATION forming part of Letters Patent No. 471,507, dated March 22, 1892. Application filed April 9, 1891. Serial No. 388,210. (No model.)

To all whom it may concern.-

Be it known that I, HORACE CRAIGHEAD, of Ballard Vale, Essex county, and State of Massachusetts, have invented a certain new and useful Improvement in Central-Draft Lamps, of which the following is a specification.

My improvement relates to central-draft lamps; and the object of the improvement is to facilitate the lighting of such lamps.

I will describe a lamp embodying myimprovement, and then point out the novel fea tures in a claim. I

In the accompanying drawings, Figure 1 is a sectional elevation of the upper part of a lamp embodying my improvement in condition for use. Fig. 2 is a similar View showing the burner part of the lamp in condition for lighting. Fig. 3 is a central vertical section of the wick-tube and the innerair-distributer.

Similar letters and numerals of reference designate corresponding parts in all the figures.

A designates the upper part of an oil reservoir or fount, which may be of ordinary form and made of sheet metal.

B B designate the wick-tube of the lamp. This wick-tube is composed of two cylindric and concentrically-arranged shells B B The shell B extends upwardly through a central.

opening or collar a, with which the reservoir or fount is provided, and is intended to extend in the usual manner down through the bottom of the reservoir, so as to form a central draft-tube. The outer shell B is here shown as attached to an outer air-distributer C, which is detachably fitted to the collar a of the reservoir A. This air-distributer C may be fastened to the collar a by means of a bayonet-joint a or any other device, or may be simply held in place by friction. This shell B when in place extends upwardly to a point on a level with the tip of the shell B of the wick-tube.

D designates a tubular wick, which fills the space between the shells B B As here shown, it is fitted to a carrier E, consisting of a band of sheet metal. It may be engaged with the carrier or band E by means of prongs on the latter or in any other suitable manner. The carrier of course slides between the two shells of the wick-tube. It is adjusted up and down by means of a ratchet-wheel F, mounted upon a shaft journaled in the air-distributer C and engaging Wit-h perforations formed in the carrier or band.

G designates the inner air-distributer,which consists of two conical shells g 9 arranged one above the other and connected with a tubular part 9 which is surmounted with a hollow head g which is perforated around the circumference. Air ascending through the central draft-tube B passes through the lower vconical shell g into the space between the shell B and the part and afterward passes through the upper conical shell 9 and is discharged at the base of the flame. Air also passes from the shell B into the part g and is discharged through the perforations of the head g into the flame. This air-distributer G is, as here shown, supported by having its lower conical shell 9' resting upon a bead or inward projection 1), formed on the shell B;

H designates an air-distributor arranged above the air-distributer C and consisting of two shells h 7?. portion constructed to form a chimney-gallery having resilient fingers h. At its inner edge it has an upwardly-turned rim or collar h The shell h extends inwardly and at the inner edge is almost as small as the shell B of the wick-tube. This shell h is perforated almost throughout its entire extent. Its outer extremity is made in the form of a downwardly-extending rim h, which fits a corresponding rim 7L formed on the shell W. The shell h may be retained in the shell 71. by means of a bayonet-lock or in any other de sired manner. It is advantageous to make it detachable to facilitate cleaning. Air entering the air-distributer C will rise to the airdistributer H, and, after passing through the perforations of the two shells h k of the latter, will enter the space within the chimney and pass to the outside of the flame. Neither shell of the air-distributer H is intended to contact with the air-distributor C. It is advantageous to leave a space between these two air-distributors H and C for the circulation of air. By this means the air-distributor C may be kept cool. As the air-distributer H does. not contact with t-heair-distributer C, it must be supported by some other part. I have shown it attached to a cylindric shell I, surrounding and snugly fitting the outer shell 13 of the wick-tube. The rim or collar at the inner edge of the shell 77, of the air-distributer H is fastened in any suitable manner to the shell I. The shell I is shown as provided with slots 2', having an ascending portion 1 and a horizontal portion 2, extending from thelower end of the ascending portion 1. The ascending portion 1 of each slot is shown as oblique or spiral. With these slots engage projections 19 extending outwardly from the outer shell B of the-wick-tube. Obviously by rotating the shell I by force applied to the airdistributer H through a handle h or otherwise the shell I will be caused to travel upwardly along the outer shell B of the wicktube, and after the shell I shall have traveled the whole length of the slots 2' the horizontal portions 2 at the lower ends of the said slots will engage with the projections b and the shell I will thereby be sustained in an elevated position. The shell I has an opening I through it below the chimney-gallery, which when the shell is in its upward or raised position affords access to the wick. The very firm bearing which the shell I will have upon the outer shell B of the wick-tube prevents any canting or tilting of the air-distributer H. Consequently the chimney and a shade, as well as all other parts supported by the airdistributer H, will not be liable to injury. Preferably there will be grooves t" at the lower end of the slots '5. These grooves may be made by bending the shell I outward.

They are intended to be deep enough to pass over the projections Z9 Thus they will render it possible to remove the shell I. Thus constructed the shell I and of course all parts sustained by it will be detachably connected to the other parts of the lamp. When the shell I is rotated into such position that the upper ends of its slots twill contact with the projections 12 the latter will sustain the shell I and its appurtenances.

It will be seen that I afford provision for raising the chimney-gallery and upper airdistributer II, with their appurtenances, in such manner that it will be possible to light the lamp without removing the chimney or shade.

What I claim as my invention, and desire to secure by Letters Patent, is-

In a central-draft lamp, the combination, with the reservoir or fount and wick-tube, of a chimney-gallery and a shell connected with the chimney-gallery and closely fitting the outer shell of the wick-tube and provided with slots engaging projections on the wicktube and consisting of obliquely-ascending and horizontal portions, and alsoprovided with grooves extending from the slots downwardly to and having an outward opening at the lower edge of the shell, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. HORACE ORAIGI-IEAD.

Witnesses: JAMES .S. GREvEs, WILLIAM M. ILIFF.

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