US35955A - Improvement in lamps - Google Patents

Description

c. H. ROBINSON.

Lamp.

Patented July 22. 1862.

UNITED STATES PATENT OFFICE.

CHARLES H. ROBINSON, OF BOSTON, MASSACHUSETTS.

lMP RQVEMENT' IN LAMPS.

Specification forming part of Letters Patent No. 35,955, dated July 22, 1862.

To all whom it may concern.

Be it known that I, CHARLES H. ROBINSON, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Lamps; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters and figures marked thereon.

Figure I is a perspective and sectional View. Fig. II is a section of the central part of the lamp. Fig. III isa plan of the wick and tube, the button being removed. Fig. IV is a plan of the wick-tube and crossbar. Fig. V is a plan of the case formed by the outer and inner tubes.

My improvements relate to lamps having a circular wick and in which air is supplied in combination with a circular wick and tube,

also moving vertically, the wick and button being so arranged as to receive a simultaneous motion when the adj ustingscrew is turned. By this combined action the top of the wick, when raised or lowered, is always at the same distance from the button.

The lamp is intended chiefly for burning kerosene or coal oils, but may be used for other kinds of oil. 7

In Fig. I the circular vessel containing the oil is shown at A, the interior part surrounding the tubes being so formed as to direct the rising current of air through the conical cap U, and cause it to impinge upon the outside of the circular wick K. A current of air also flows through the holes Ein the dripping-cup G at the base of the lamp and ascends through the inside of the fixed central tube, Q, to the inside of the wick, thence the combined currents strike the button or disk I, which is of about the same diameter as the outside tube, H. This button is supported upon the top of a small wire, L, that passes down through the center and is soldered to the screw F, the thread of which plays in the bottom of the dripping'cup C. By turning this screw at the milled head G the wire L and button I are raised or depressed.

The description thus far relates to parts heretofore known, the button and screw being used in camphene and fluid lamps for regulating, to a certain extent, the height of the blaze. My improvements relate to the central tubular parts which are thus constructed.

The outer and inner tubes, H and Q, are joined at the base, at which point they are screwed. to the top of the dripping-cup. These tubes are concentric, and the inner one is about an inch shorter than the outer one. The difference in their diameters is about one-fourth of an inch, or sufficient to form an annular space, J, wide enough to receive the movable wick-tube and the wick K. A flat bar, S, extends from side to side of the inner fixed tube near its top, and has a hole at its center, through which a circular collar, M, that is made fast to the central wire, L, traverses. The wick-tube P is of the same length as the outer tube of the case H Q, and the circular wick is slipped upon it and retained by friction, the tube and wick. nearly filling the annular space J, as above mentioned. A flat bar, N, is also soldered to the inside of the wick-tube near its top, and has at its center a l hole, T, in which the central wire, L, canpla-y without friction. WVhen the wick tube is dropped into the case, the lower side of this bar rests upon the top of the collar M. The button I is then placed upon the top of the wire L and the lamp is ready for lighting, the oil B being supplied from the vessel Athrough the feeding-tubes NV and W, passing through the outer tube, H, of the case H Q.

The height of the button above the top of the wick-tube is adjusted (by lengthening or shortening its supporting-wire) to the point that will give the best flame, and when this is attained the collar M should just touch the cross-bar of the wick-tube, as represented in Fig. ll.

\Vhen the flame grows dim from incrustation or other cause, the screw F is turned, which raises the button and wick-tube, thus exposing a new portion of the wick, and at the same time retaining the top of the wick and wick-tube and button, by which their distance the button at the same distance apart as before. apart is always kept uniform, by means of the \Vhat Iclaini, and desire to secure by Letters screw and attached parts, as herein fully de- Patent, isscribed, or their equivalents.

1. The wick-tube and Wick moving verti- CHARLES H. ROBINSON. [L. s.] cally together, instead of moving the wick In presence ofalone, as heretofore practiced. SAML. BATOHELDER, J12,

2. The simultaneous vertical motion of the I J. M. BATOIIELDER.

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