US149712A - Improvement in reflecting-lamps - Google Patents

Description

PATENT @Prion i 'nutren STATES' EMIL BOESOH, OF SAN FRANCISCO, CALIFORNIA.

.IMPROVEMENT IN REFLECTlNG-LAMPS. l

Specification forming part of Letters Patent No. 149,712, dated April 14, Y1874; application filed February 14, 1873.

To all whom 'it may'concern." l Be 1t known that I, EMIL Bonson, of San Francisco ci tyand county, State of California,

have invented an Improved Reflecting-Lantern; and I do hereby declare the followin g description and accompanying drawings are suffiL cient to enable any person skilled in the art or science to which it most vnearly appertains to make and use my said invention or improvei ment without further invention or experi.- inent. l

This improved lamp or lantern I shall call the `long-range duplicate reflector, its object being to provide a light Aof more than usual intensity, by which mills, mines, and like places can be properly lighted.

In mining and many other kinds of nightwork it is necessary to direct a strong light upon a particular spot where the workI is be ing carried on, and in `hydraulic mining especially it is necessary to keep the lamp or lantern at a considerable distance from this point, so as to protect it from the sliding or caving of the bank.' This lantern is intended to supply this want; and in order to obtain the desired volume of light, my lantern is provided with twin lamps, and the reilector is provided with twin focal reiiectors, so that a strong concentrated light will result. The intensity of the light may be increased by adding other lamps and corresponding focal reflectors, as many as may be required.

Instead of constructing the focal reiiectors separate from the main reiiector, so that they can be adjusted independently, as shown in my former patent, No. 142,433, dated October 22, 1872, I secure the focal reflectors to the main reflector, and mount the main rellector A on trunnions, so that the whole reiiecting apparatus may be directed as required, and thus carry the bodyof light to any point where it may be required.

Besides the above advantages, my invention represents other improvements of value.

In order to explain my invention so that others may be able to understand its construction and arrangement, reference ishad to the following description and accompanying' drawings, in which- Figure 1 is a front view of my lantern. Fig. 2 is a sectional elevation. Fig. 3 is a plan view looking downward, with the top of the case out away on the line :v a" of Fig. 2.

A represents the body or case of my lamp or lantern. This case Imake of ay V shape, so

vthat when the reflector is in place 11o space tion. The reflector D is made in any conveni ient form, being gradually drawn in toward the 'rear end by the parabolic curve given to its sides. E E are the twin focal reliectors, which are secured in the bottom or apex of the main reflector, so as to provide a separate focus for each lamp employed 5 or the reiiector may be formed in such a manner as to provide the desired number of focuses without using additional or focal reflectors. A11 opening, d, is made in the lower part ofthe reli'ector D, wide enough to admit the lamp-stand B, and another opening, d', is made in the roof of the reflector, through which the chimneys of the lamps pass. A lid or cover, c, is hinged to the outside upper rim of the reliector D, sothat when it is down it will cover the upper opening, d. The lower side of this cover has a reiiectingsurface, so that the entire upper portion of the reflector will be utilized, while the lampchilnneys can be inserted by simply raising the lid until they have been placed, when the lid will be dropped so as to cover the opening. A plate, f, is secured to each side of the case at the proper height, and on its -rear portion, in which trunnion-bearings are provided. The reflector D has a trunnion, g, on each side, so that it can be suspended fromvtheplates f, and whenthus suspended the lamp-stand B will project through the opening in the lower part of the reiiector. A quadrant-plate, h, is se cured to the under side of the reflector, in the circular edge of which a series of holes is made. This plate moves between two vertical plates below the lamp-stand, and when the reflector v is adjusted to the desired angle a pin, z', is passed through one of the holes in the quadrant, so as to holdthereilector in place. Holes In the rear portion of the bottom are made in the bottom of the lampcase and below the door at the front, through which air is admitted to supply the flame; and in order to direct the air which enters below the lampstand up through the opening in the lower part of the reflector, I secure a plate, j, at an angle in the lower part of the lamp-stand, so that it will prevent the air from passing out in front of the reilector. The air which thus en ters the reflector will, when heated, pass up through the opening in the upper partof it, and thence through the chimneyto the outer air, and as the supply will be const-ant the interor of the lamp cannot become overheated. I have also discovered that by corrugating, or rather making radial grooves in,"aJ focal reiiector, as shown, the light which it reiiects will be much subdued, so .that the eyes will not be strained by looking at it, while at the same time the grooves do not impair the reilectin g powers of the reector, thus obviating one objection to j the use of these reiiectors. The roof of the lamp is made in two parts, one above another, so as to provide a space for the heated air to pass out. The chimney or dome K has a cap, l, which slips down over it, being locked by a pin on the dome moving in a spiral groove in the cap, so that atwisting motion is required to turn the cap down. Holes are made in the sides of the cap, through which the smoke passes to the outer air. By raising or lowering this cap, the draft through the lamp can be regulated, as required.

By this construction I provide a lamp of great power, and one which is especially adapted for the purposes mentioned.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The rclectorD, having the openings d d', the upper opening, d', being provided with a hinged sectional cover, e, which forms a part of the reflecting-surface when closed, substantially as above described.

2. The verticallyadjustable reflector D, with its trunnions g supporting side plates f, and having the quadrant attachment hand pin i, by which the reflector can be shifted and Xed in the desired position for directing the light, substantially as specified. 3. The lamp-stand B, open in front and having the inclined plate j, in combination with a lamp-case having holes in its bottom, for the purpose described.

In witness whereof I hereunto set my hand and seal.

EMIL BOESCH. [L. s.] v- Witnesses:

JOHN L. BOONE, C. M. RICHARDSON.

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