US643496A - Lamp-burner. - Google Patents

Description

Patented Feb. l3, I900. H. GREENWOOD.

LAMP BURNER.

(Application filed, June, 21, 1899.

(No Model.)

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LAM P-BURNER.

SPECIFICATION forming part of Letters Patent No. 643,496, dated February 13, 1900.

Application filed June 21, 1899. Serial No. 721,386. (No model.)

To aZZ whom it may concern.-

Be it known that I, HARRY GREENWOOD, a citizen of the United States. residing at Barnesborough, in the county of Oambria and State of Pennsylvania, have invented certain new and useful Improvements in Lamp-Burners; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention has relation to lamp-burners, and more particularly to means for holding the chimney in place, as well as means for raising and lowering the wick.

The object of the invention is to provide a simple, durable, and inexpensive clasp by means of which chimneys of different sizes may be securely retained in place on the burner; furthermore, to provide simple and inexpensive means for raising and lowering the wick and holdingitin its adj ustedposition.

With this object in view the invention consists in certain features of construction and combination of parts, which will be hereinafter fully described and claimed.

In the drawings, Figure 1 is a perspective View of my improved lamp-burner. a longitudinal sectional View. Fig. 3 is a detail perspective view of the wick-raiser removed.

In the drawings the same reference characters indicate the same parts of the invention.

1 denotes the burner, which may be of any well-known or approved construction. Instead of providing this burner with the usual spring-arms commonly employed for holding the shade in position I attach to the burner at any suitable point a vertical standard 2 of an open spring-clasp 3, which entirely surrounds the burner and enables chimneys of different sizes being easily and quickly attached to the burner. It is of course understood that this clasp is made of a size to clasp the smallest-sized chimney, and when a larger chimney is placed in position owing to the resiliency of the clasp it will exert its energy to securely clamp the chimney to the burner.

Instead of providing the burner with the ordinary rotary spur-wheel for raising the wick I provide what I term a claw-bar 4, which extends through a portion of the body of the Fig. 2 is burner and is formed with a head 5, provided with teeth 6, which are adapted to project through the longitudinally-disposed opening 7 in the wick-tube and engage the wick. Coiled around this claw-bar and confined between the lourner and the head 5 is a spring 8, the energy of which is exerted to force the teeth into the wick and hold the wick in its adjusted position.

Owing to the inclination of the claw-bar to the wick-tube the pressure of the spring is more nearly in a line with the movement of the wick, and therefore the wick is not so likely to be jarred down as it would be if the bar and spring were more nearly at right angles to the wick-tube. To prevent the outer end of the claw-bar coming in contact with the bowl of the lamp, I prefer to bend it upward at a slight angle, which will also permit of the insertion or removal of the claw-bar after the wick-tube is in position. The advantages of this will be apparent from an examination of Fig. 2, in which it will be seen that the opening through which the end of the claw-bar projects is made in the vertical wall of the burner, and it would be impossible to insert the claw-bar between the wall and the wick-tube if it were not for the bend in the bar near its center, which permits the bar to pass through the opening withoutbinding and without making the opening too large.

The spring upon the claw-bar is of greater length than the distance between the shoulder or head of the bar and the wall through which it projects when the bar is in engagement with the wick-tube at the upper end of the slot, which will thus always hold the bar, and with it the wick, against backward movement from jars or blows, which might otherwise cause the wick to be lowered. This con struction also causes the upper wall of the slot to act as a stop or limit to which the wick may be raised after the prongs have been inserted in the wick. In Fig. 2 the bar is shown in engagement with the wick at a short distance below the stop ready to be raised and project the wick beyond the upper end of in engagement with the wick than could be secured with a horizontal arrangement of the bar or a shorter slot in the wick-tube.

I11 operation if it be desired to elevate the wick the claw-bar is grasped and pulled outward. Thence theclaw-teethareswungdownward by elevating the upper outer end of the bar and engage with the wick. Then by depressing the bar the wick is elevated the distance of movement of the claw-teeth. A reverse movement of the bar will lower the wick.

\Vhen adj usted,itwill be noticed that,owing to the tension of the spring, the wick will be held firmly in place, so that there will be no liability of it being jarred down if the lamp is suddenly placed upon a table, or, if the burner be used for a lantern, when the lantern is violently swung in giving signals.

It will of course be understood that changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is

The combination with a lamp-burner, the vertical.wall of which is provided with an opening and the wick-tube is slotted longitudinally, the upper end of the slot being at a distance above the opening in the wall, of a claw-bar through said opening, the outer end of which is bent upward and the inner end is provided with a shouldered head, said head being provided with teeth in position to engage with the wick through the slot in the tube; and a coiled spring around the bar, one end of which engages with the Wall of the burner and the other end engages with the shoulders of the head, the bar and the spring being inclined to the wick-tube, and the length of the spring being greater than the distance between the shoulders and the wall of the burner when the head is in engagement with the upper wall of the slot in the wick-tube, whereby the head is normally held in engagement with said wall, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HARRY GREENlVOOD.

\Vitnesses:

HENRY MCANULTY, O. V. FLIoK.

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