US1066419A - Catoptric lantern. - Google Patents

Description

J. A. REY. GATOPTBIG LANTERN.

APPLICATION FILED AUG. 30, 1911.

1,066,419, I. Patented July 1, 1913.

. 28KEE'1'8-SHEE1'1.

J. A. REY. CATOPTRIG LANTERN.

APPLICATION FILED we. so, 1911.

Patented July 1, 1913.

2 SHEETS-EHBET 2.

JEAN ALEXANDBJE REY, bF'PARIS, FRANCE.

CATOPTRIC LANTERN.

Specification of Letters Patent.

Application filed August 30, 1911. Serial Ito. 646,906.

T o 611 whom it may concern:

Be it known that'I, Jnaw hlnxannnn REY, of 26 Avenue de .Su-fi'ren, Paris,

France, engineer, have invented a new and useful Improvement in Catoptric Lanterns, which improvementis fully set. forth in the following specification.

This invention consists in improvements on the inventionof catoptric apparatus for rotating lanterns for lighthouses and the like, for producing a number of flasheswit-h a single source of light, described in the specification of French Patent- No. 415,987 of July 26th 1909 and of the corresponding British Patent No. 26,4577v of 1909.

.The invention describedin the said specification consists substantially in combining for the said purpose a source oflight with a certain number of reflectors each of which is adapted to furnish one of the desired beams of light and is segmented in such a manner as not to intercept thebeanis furnished by the other reflectors. In the ex amples of such apparatus described in the said specification, circular reflectors are employed which are segmented by a diame-tral plane dividing them .into two halves, or

by two diametral planes dividingthem intoangles with one another; The dimensions of ments however (for instance the segments from which the light is partially shut off by the body of the lamp) may have slightly greater dimensions than the other segments in order that all the reflector segments of one and the same group shall have the same useful effect. J;

Various waysaof carrying out inven- .tion. are illustrated by way of example in the accon'ipanying drawings. a

In these drawingsFigure 1 represents diagrammatically the reflector divided into equal segments; Fig. 2, a diagrammatic plan thereof, showing the two segments set in operative position Fig. 3, a View similar to Fig. .1, showing a reflector divided into view respectively, of a lantern embodying the modified form of divided reflectors of F ig. 5; Fig. 0 a diagrammatic.elevation of another modified form of divided reflectors; Figs. 6 and 6*, an elevation and a plan View, respectively, of a catoptric lantern embodying the said modified form of divided reflectors; Figs. '7 and 8, a diagrammatic elevation and a diagrammatic plan, respectively, of another modified form of divided reflectors; Figs. 7 and 8 an elevation and a plan of a ca'topt-ric lantern embodying said'latter modified form of reflectors; Fig 9, a diagrammatic elevation of still another form of divided reflectors, embodying my invention.

Fig. l is an elevation of a reflector segmented by a horizontal diametral plane in the manner described. in our aforesaid specification, the. halves a a, of which may be arranged in the manner shown in plan in Fig. 2, that is to say, set in any desired different azimuths 3),, Z1 i In the reflector shown in elevation in Fig. 3, the segmentation is effected in two horizontal planes neither of which is diametral. The segments 0,, c c of the reflector which are thus formed, may be arranged in the manner shown in plan in Fig; 4, that is to say, they may likewise beset in any desired diflercnt azimuths (Z 01,, (L, This however does not apply in cases Where the horizontal segmenting planes are situated ata great distance from the center of the re flector.

In Figs. 4 and 1' is saown a cat-optric lantern embodying this form of divided refiect rs, 7 As will be seenhy reference to Patented July 1, 1913. s

'm'es the standards 2' for supporting tlg rethese figures, the sectional reflectors are supported by standards i, rising from the table or platform in, the source of light j be ing arranged at the proper focal point with respect. to the. reflectors. This part of the apparatus is supported upona mercury bath Is on which it floats. ing the apparatus in the usual manner is represented at Z. Figs. 5 and 6 illustrate reflectors the segmentation of which is effected, not by hori- Zontal planes, but by planes which inclose any desired angles between them and produce segments indicated respectively by the reference letters e e e and f,, f,, in the two reflectors. In Figs. 5* and 5* is shown a catoptric lantern embodying the use of a divided reflector as indicated in Fig. 5. In these figilr'rtut sections, the platform m from v. ieh they rise, the mercury bath is and the motor for rotating the apparatus Z, are of substantially the same form and operation as in Figs. 4 and 4".

In Figs. 6 and 6 the form of divided reflector indicated diagrammatically in Fig. 6 is embodied. In these figures, in addition to the supporting standards i, there are shown the connecting links n which unite the various sections of the reflector and, in cooperation with the standards i, maintain them in their proper relative positions with respect to each other.

in such casesit is not possible to set the different segments of a reflector in any desired azimuths. However if the segments are moved slightly away from one another and thus set in adjacent azimuths, a group of three flashes will be formed. If the distance between these segments be increased, the angleformed between the azimuths will be increased If however this carried too far, the risk would arise of one of the segments intercepting the beam that is reflected by one of thetwo other segment-s.

It is only in certain special cases that it can be ascertained by trial whether it is possible to adopt for equidistant flashes a segmentation other than that effected byhorizontal planes. Such segmentations (by planes which inclose any desired angles between t-hcin) are very well adapted for pro ducing groups of flashes as hereinbefore shown.

If the reflector segments are placed only a very small distance apart, the angle formed between the azimuths becomes very small. It is even possible to select such an angle that beams of light will notbe' separated from one another and will contact one another at their edges. By this means instead of a group of a number of flashes, there will be produced a single flash The motor for rotatof multiple duration, for-instance in-the construction shown, a single flash of threefold duration, insteadof a group of three flashes. Such an arrangement allows thus of increasing the width of a beam and, consequently, duration of a flash and may have great advantages forpractical work. It is obvious that the-reflectors may be subdivided into more than three segments, without their operation departing in any essential 'respect from that described with reference to the arrangements shown in Figsfiandti. The segmentation may be effected otherwise than along planes for instance along any desired lines. It is also possible to combine segmentation along horizontal planes, as shown for example in Figs. 1 to 4, with a segmentation along n0n horizontal lines, as shown. for example in Figs. 5 and 6. Segmentation for instance along a horizontal plane and two vertical planes (which are not parallel),

produces a construction such as that indi-' I divided as indicated in Figs. 7 and 8. In

these figures, the supporting standards, the connecting links a, the table or platform m, the mercury bath is and the mo'torli are of the same construction and serve the v same purposes as in the forms shown in the preceding figures.

It sometimes happensthat the body of the lamp intercepts the light from a por tion of the reflector and thereby reduces the useful effect of one or more of the lower segments of the reflector.- Now in order that these reflector segments shall have the same useful effect as the other segments,

they may be made of slightly greater dimensions. For instance in the preceding case of segmentation (Fig. 7) the reflector may be cut off .by a horizontal plane situated By this slightly above the center line. means there is produced the construction shown in Fig. 9 in which the segments k h b situated above the horizontalplane:

are of smaller. dimensions than the corresponding segments h h h situated be: low'that plane. i Claims 1. In catoptric lanterns, agroup of reflector-sections adapted to rotate concurrently around a source of light, said re- Hector-sections being parts of a concave reflector formed y dividing the same along lines one at ieas of which is non-dianietral.

2. In catoptric lanterns, a group of reflector-sections adapted torotate concurrently around a source of light, said reflector-sections being parts of a concave reflector, formed by dividing the same along horizontal and non-diainetrical lines, and being shifted horizontally with respect to each other.

3. In catoptric lanterns, a group of reflector-sections adapted to rotate concur rently around a source of light, said re- Hector-sections being parts of a concave reflector, formed by dividing the same along cave reflector formed by vertical and non-dian'ietrical lines, and bel l i ing shifted horizontally with respect to each other.

4. In catoptric lanterns, a group of reflector sections adapted to rotate concurrently around a source of light, said reflector-sections being parts of a concave reflector, formed by dividing the same along noirdianietrical lines, and being shifted horizontally with respect to each other in such a manner that the several light beams have common generating lines for the purpose of obtaining a single flash of increased duration,

5. In catoptrie lanterns, a group of reflector-sections formed 3:. parts of a concave reflector formed by dividing the same along vertical planes and a horizontal plane.

6. In catoptric lanterns, a group of reflector-sections formed as parts of a concave reflector formed by dividing the same along vertical planes and a horizontal nondianietrical plane.

7. In catoptric lanterns, a group of reflector-sections, formed as parts of a concave reflector formed by dividing the same along vertical planes and a horizontal plane, said sections being shifted horizontally with respect to each other.

8. In ('atoptric lanterns, a grou') of reflector-sections formed as parts oi a condividing the same along vertical planes and a horizontal liondiaiuetral plane said sections being shifted horizontally with respect to each other.

9. In catoptric lanterns, a group of re .i'lcctor-sections formed as parts of a concave reflector formed by dividing the same along vertical planes and a horizontal plane, said sections being shifted horizontally with respect. to each other, the group of sections above the horizontal plane of section being arranged at an angle with respect to the group of sections below such plane.

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

JEAN ALEXANDRE REY.

W itnesses DEAN B. MAsoN, Fui'innnio IIARLiE.

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