US652565A - Lens attachment for lamps. - Google Patents

Description

Patented .lune 26, |900.

J. C. MDLLOY.- LENS ATTACHMENT FUR LAMPS.

(Application led July 12, 1899.)

(No Model.)

Til

ahi` z .lilllill f y f N W/TNESSES:

ilton and State'of4 Ohio, have invented a new i Prion.

JOHN CHRISTOPHER MOLLOY, OF CINCINNATI, OHIO, ASIGNOR OF THREE nienrns To CORNEAL J. PLAcn.

MCW'ILLIAMS AND JOHN SCIIULTE, OF SAME LENS ATTAH M ENT ronV LAM Ps.

SPECIFICATION forming part of Letters :Patent No. 6152,565, dated June 26, 1900.

. Application filed .l'uly 12, 1899. Serial No, 723,580. (llo model.)

To all whom, t may concern: Y

Be it known that I, JOHN CHRISTOPHER MOLLOY, of Cincinnati, in the county of Hamand Improved Lens Attachment for Lamps, of which the following is a full, clear, and exact description. i

The object of the invention is to provide a new and improved lens attachment for lamps designed to increasethe illuminating power of a lamp.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed ont in the claims.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar' characters of reference indicate corresponding parts in both the views.

Figure l is a sectional side elevation of the improvement, and Fig. 2 is a sectional plan view of the same on the line 2 2 in Fig. l.

As shown in the drawings, the cylindrical lamp-chimney is provided with a base A, the cylindrical burner portion A being somewhat less in diameter than the base and terminating in a still more reduced top portion A2. On the junction between the base A and the cylindrical iame or burner portion'A' is arranged an annular external saddle or seat A3, on which is adapted torest the lower end of a lens B, made tubular and surrounding the burner or flame portion A', an air-space be' ing between the inner surface of the lens and the portion A. The lens B, as shown, is plano-convex; but I do not limit myself to the exact form shown.

On the lower end of the lens B is formed an inwardly-extending flange B for increasing the seating-surface of the lens on the saddle A3 and for receiving the outer ends of bends or projections C in a ring C, preferably of split form and seated in an annular groove in the chimney, as is plainly shown in Fig. 1, said ring serving to hold the lens B concentric to the chimney and leave a uniform airspace between the lens and the chimney.

In order to allow air to circulate through the air-space tokeep the lens and chimney as `cool as possible, I prefer to form the saddle AB with recesses A4 to allow the air to pass to the lower end of the air-space and ascend therein and pass out of the sameat the upper end of the lens.`

By the arrangement described the lens is securely held in place on the chimney when the lat-ter is placed in position on the lamp, and whenv the burner is lighted then the rays of light from the flame pass through the chimney portion A and are retracted by the lens B into the room, so that the latter is very highly illuminated.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. A lens attachment for lamps, consisting of a tubular lens adapted to surrpund a lampchimney opposite the liame or burner portion, a retaining and spacing device carried by the lamp-chi1nney-for holding said lens in position concentric to the chimney to leave a uniform airspace between the lens and the chimney, and air-inlets leading to the lower end of the said air-space, substantially as described.

2. A lens attachment for lamps consisting of a tubularlens adapted to surround a lampchimney, and having an inwardly-extending flange at its lower end, and aspacing device engaging the said flange, to hold the lens concentricfto the chimney, substantially as described.

3. The combination with a chimney provided with an external scat, of'a tubular lens having an inwardlyextendingange at its lower end adapted to rest on the seat on the lamp-chimney, and a retaining and spacing device for holding the lens in position on the chimney and properly spaced therefrom, substantially as set forth.

4. The combination with a chimney, of a lens supportedat its lower end thereon and surrounding the chimney at the flame or burner portion, and a ring carried' by the chimney and engaging the lens to hold it properly spaced from the chimney, as set forth.

5. The combination with a chimney pro* vided Awith an external saddle or scat, of a IOO tubular lens having a ange at its lower end adapted to rest on the said seat, and a device vided with an external saddle or seat, of a` tubular lens set on the seat and spaced from the chimney, and a device for holding said lens to the seat and properly spaced from the chimney, as set forth.

7. The combination, with a chimney provided with an external saddle having recesses for the admission of air, of a tubular lens having an inwardly-extending flange at its lower end and set on said base, and a ring having projecting portions and held on the chimney and engaging the said lens at said flange,l

substantially as shown and described.

or burner portion of the chimney and rest on the said seat, the said lens being spaced from 3 the chimney, and the said seat being provided with recesses to allow air to pass to the space between the lens and chimney, substantially as described.

9. The combination with a lamp-chimney provided with an external recessed seat, of a tubular lens spaced from the chimney and adapted to rest. on said seat, as set forth.

l0. The combination with a lamp-chimney provided with a base of greater diameter than the ame or burner portion of the chimney, the said chimney having an external seat located at or near the junction of the base and the fiame or burner portion, of atubular lens adapted to surround the iiame or burner portion of the said chimney and rest with its lower end on the said seat, and means for holding the said lens in position on the seat and spaced from the chimney, the said seat being constructed to admit air to the lower end of the space between the lens and the chimney, substantially as described.

1l. The combination with a lamp-chimney provided with an external seat and having an annular groove adjacent to the seat, of a tubu- 8. The combination With a lamp-chimney having an annular seat near vits lower end, of:

va tubular lens adapted to surround the flame lar lens adapted to be seated on said seat, and a split ring of spring materia-l adapted to be seated in said annular groove in the chimney the said ring having bends or project-ions ar-4 ranged to 'engage the said lens, substantially as described.

JOHN CHRISTOPHER lllOLL'OY.

lVitnessesz,

MILLARD F. RoEBLINe, THos. W. LINEHAN.

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