US2271836A - Lamp globe - Google Patents

Description

' Feb. 3, 1942. I J. G. FRANCIS 2,271,836

LAMP GLOBE Filed Sept. 24, 1938 I N VEN TOR.

(5km GHQ/72045 54 m ATTORNEYS.

Patented Feb. 3, 1942 John G. Francis, Chicago, Ill., assignor to Chamberlain, Inc, Chicago, 111., a corporation of Illinois Application September 24, 1938, Serial No. 231,555

4 Claims.- (01. 240-100) This invention relates to lamp globes or shades, and a primary object of the invention is to pro} vide a new and novel shade or globe upon which there is applied, by spinning or otherwise, a metal covering having a high reflecting inner surface, the metal member being of a size and shape substantially equal to the globe upon which it is applied so that the metal member will'lie flush against the glass surface.

Another object of the invention is to provide a glass or similar globe with a partial metal cover or shell, the coveror shell being'adapted to lieflush against the surface of the glass, there be-' ing interlocking means between the glass and the' cover or shell to hold the members in relative position.

Another object of the invention is to provide a metal protective surface for shades, globes',-and' the like, the surface being adapted to be applied directly flush against a part of the glass and hav-' ing an inner surface of reflecting characteristics.

Another object of the invention is to provide a metal member having an inner reflecting surface, which member is adapted to be mounted on the exterior surface of the lamp globe, shade, or

the like, so as to prevent light from passing through the globe at the parts where the metal is in contact with the glass and to reflect the light through the remaining portion of the glass body.

Still another object of the invention is the provision of a metal shell interlockingly engaged with a glass ribon a glass globe and extending from the neck of the lass globe to substantially the central portion thereof, the metal shell being in close contact with the globe at all parts thereof, except at a point adjacent the neck thereof where the metal is spaced slightly from the glass to provide a flexible surface for the engagement of fastening means.

Numerous other objects and advantages will be apparent throughout the progress of the following specification.

The accompanying drawing illustrates selected embodiments of the invention, and the views therein are as follows:

Fig. l is an elevation of a lamp globe shown in its downward suspended position and embodying the invention;

Fig. 2 is a detail sectional view on the line 2- ofFig. l;

Fig. 3 is 33 of iga detail sectional view on the line of lamp globe and to which the invention is ap- Fig. 4 is an elev'ational'view of a lamp globe in' a vertical or standing position and embodying the invention; 1

Fig. 5 is an elevational view of a lamp globe and embodying another form of the invention;

Fig. '6' is a view similar to Fig. 5 but showing the neck ring integral with the shield or cover' instead of detached therefrom, a shown in Fig. 5;

Fig. 7 is an elevational view of a lamp globe, showing the manner in which a part shield is:

fastened to the globe;

Fig. 8 is a detailsectional view on the line 8-8 ofFig.7;and j Fig; 9 is an elevational view of a, modified form plied.

The particular embodiments herein disclose for the purpose of illustrating'the invention comprise a lamp globe or shade f0 (Figs. 1 to 8) of any conventional typeandpreferably made-of glass. The glass maybe clear, frosted, opaque or colored to meet the necessary requirements for which the globe is designed. For a lamp globe for street lighting or interior lighting, however,'itis preferable that the glass be-provided with light-diffusing ribs; prisms, or elements ll so as to spread and diffuse the light as muchas possible. The globe I0, Fig. 2,- is globular in shape and has a neck I 2 which is connected to the'main partof the body of the globe'by an inwardly curved connecting portion l 3, the neckl2 and the curved portion l3 being integrally molded with the body of the globe. The curving of the globe between the body and the neck l2 provides the usual or conventional recess l4 into which the fastening'means or screws protrude a predetermined distance for holding the globe in position to a standard, and to prevent accidental,

removal thereof. The neck I2 is in the shape of an annulus, there being an opening I5 of sumcientsize to permit the globe to be inserted in position over a lamp. f

The globe so far'described is more or less conventional in design, but the disadvantage of a, globe of conventional design is thatthe outer edge. l6-of the neck, and the inner edge I! of the neck about the throat of the globe will chip, andbreak, and probably cause injury to a person whenthe globe is handled. This is particularly true during the time when the globe is originally installed, or at such times when the globe is re-- moved for cleaning and replacing. Another dis-,v

advantage of the conventional globe structure is that .the light passes through all surfaces of the glass and is" not reflected in any particular place or direction, nor is there any means provided to properly shade part of the globe.

The next portion of the globe may be provided with a spun metal ring of the type disclosed in Patent No. 2,068,967, issued January 26, 1937, whereby the neck of the globe is protected from becoming damaged by the fastening screws because the screws Will engage a resilient portion of metal spaced from the recess I4.

The present invention includes a metal shell or covering H! which in globes of the suspended type extends downwardly from the neck I2 to a point indicated by the numeral 19 (Figs. 1 and 2). This metal shell is provided at its lower surface with a bead 20, Fig. 3, having an internal annular groove 2| engaging an external rib 22 formed on the glass globe Ill. The bead or rib 22 on the glass globe is preferably formed by providing a groove in the mold in which the globe is blown, and in such instances there is likely to be an internal groove 23, but regardless of whether or not there is an internal groove there will be an outer projecting glass bead 22.

The upper end of the shell l8 (Figs. 1 and 2) may terminate in a continuous ring 24 of the type disclosed in the aforesaid patent, and comprises a curved portion 25 which is slightly spaced from the neck, as indicated at 25 (Fig. 2) This portion 25 is integral with the remaining metal shield I8 and includes an integral portion 21 which engages the extreme outer edge of the neck about the throat. The part 21 may extend inwardly a predetermined distance and is bent, as indicated at 28 (Fig. 2), to provide an inwardly extending ring 29 engaging the inner surface of the globe about the neck.

When applying the shield to the globe the shield I8 is of substantially the same contour as the globe Ii] and is adapted to fit tightly and snugly against the outer surface of the globe so as to bring the bead 20 over the glass bead 22 (Fig. 3) on the globe. The globe, with the shield thereabout, is then subjected to a spinning operation so as to securely lock the bead 20 on the metal shell, securely over and about the glass bead 22 On the globe, and therefore secure the shell tightly to the globe. The parts 2429 of the neck ring are preferably integral with the member l8 and are formed in the position shown in Fig. 2 by a spinning operation, in the manner clearly disclosed in the aforementioned Letters Patent. I

The inner surface of the shield I8 is polished and shiny so as to produce a high reflecting surface. Therefore, when the globe In, with the shield I8 applied thereto, is fastened in suspended position, all the light from the lamp inside of the globe will be reflected downwardly below the end I9 of the shield.

In the embodiment shown in Fig. 4 the globe I is adapted to be in vertical position, that is, to be supported upwardly from the top of a vertical support or post. In this casethe collar or metal ring 24 is spun about the neck in the manner disclosed in the aforesaid Patent No. 2,068,967, and the shield I8 is arranged about the upper surface of the globe, as clearly shown in Fig. 4. The globe shown in Fig. 4 includes the glass rib 22 and the rib on the shell, the only difference between the device shown in Fig. 4 and the device shown in Figs. 1 and 2 being that the parts are inverted and instead of providing an opening about the neck, the shell l8 extends completely in spherical form about the entire upper surface of the globe, as shown in the drawing, Fig. 4.

In Fig. 5 the shell 18 is located about a part of the globe but does not divide the globe centrally, the bead 20 being inclined or disposed at an angle to the vertical axial center line of the globe so that one-half of the globe, including a part of the top and one side, is covered, while the remaining'part of the globe remains clear. Thus a certain side may remain shaded and another side may be the illuminated portion of the globe. However, the shell has high reflecting qualities on its inner surface and deflects the light through the part of the globe not covered by the shell. In the embodiment shown in Fig. 5 the rib 20 on the shell 18 is spaced from the lower metal neck rotecting ring 24.

The embodiment shown in Fig. 6 is very similar to the embodiment shown in Fig. 5, but shows the shell I8 integrally connected with the protecting neck 24. In this respect the structure is similar to the structure disclosed in Fig. 2 of the drawing, but instead of the shield l8 extending midway across the center of the globe, it extends at an angle so as to cover a side and lower part of the globe, leaving the opposite side and upper part of the globe open, through which the light shines.

In such cases where it is desirable to shade a portion of the globe, as for instance to prevent a street light from shining into a house window or door, the shield [8 (Figs. '7 and 8) may comprise a circular member 30 which is provided with an outer peripheral groove having an an-' nular recess, while the globe I0 is provided with an external annular rib to be received in' the recess on the member 30. The member 30 is fixed in position to the globe by spinning the material around its periphery so as to securely lock the element to the lamp globe.

In Fig. 9 there is shown a globe of a different contour than the conventional circular globes. The globe shown in Fig. 9 is parabolic in configuration and includes the ring 24 and the shield l8, as previously described with reference to Fig. 2. However, the part of the globe extending from the point 19 to the bottom thereof is relatively shallow, but in other respects the construction of the shield and its method of application is identical with that previously described.

The invention provides not only a protecting surface for the lamp globe, as well as a cushion means for receiving the fastening means, but also causes part of the lamp globe to be shaded and reflect light from the lamp entirely through the open portion of the glass.

The invention is adapted to be easily applied to the globe and makes a tight connection therewith, as well as tending to support the globe in position, either in resting or suspended position. The material from which the shield I8 is made may be aluminum or any other material of a similar nature which is capable of being spun. Regardless of the type of metal used, it is preferable that the inner surface, which contacts the glass, is made highly reflective. It is also desirable that the glass portion showing is made of some sort of prism or similar type of glass so as to completely diffuse the light reflected by the shield I 8.

Changes may be made in the form, construction and arrangement of the parts without departing from the spirit of the inventionor sacrificing any of its attendant advantages, and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

The invention is hereby claimed as follows:

1. A lamp housing comprising a globe of transparent material for enclosing a lamp, saidhousing having an opening defined by a neck about the said opening having an annular groove, a one-piece metallic ring spun about the neck of said glob-e to reinforce the globe about the neck, a portion of the ring about the outsid of the globe being spaced from said annular groove of the globe to form a cushion between the globe and the ring, and a shield of sheet material conformable to a substantial portion at least of the exterior globular surface of said housing about the neck, said shield residing in conformity with the said exterior surface and in light reflecting relationship with respect to; the uncovered portions of the housing and being integral with the ring for support thereby.

2. A lamp housing comprising a globe of transparent material for enclosing a lamp, said housing having an opening defined by a neck about said globe about the said opening, a onepiece metallic ring spun about the neck of said globe to reinforce the globe about the neck, a portion of the ring about the outside of the globe being spaced from a part of the globe to form a cushion between the globe and the ring, a shield of sheet material conformable to a substantial portion at least of the exterior globular surface of said housing about the neck, said shield residing in conformity with the said exterior surface and in light reflecting relationship with respect to the uncovered portions of the housing and being integral with the ring, annular rib means projecting from the exterior surface of the globular housing and spaced from said neck, a portion of said shield being spun into conformity with the reversely extending portion of said rib for permanently locking said globe and shield in position.

3. A lamp housing comprising a globe of transparent material for enclosing a'lamp, said housing having an opening defined by a neck about said globe about the said opening, a one-piece metallic ring spun about the neck of said globe to reinforce the globe about the neck, a portion of the ring about the outside of the neck of the globe beingv spaced from the neck of the globe to form a cushion between the globe and the ring, a shield of sheet material conformable to a substantial portion at least of the exterior globular surface of said housing about the neck, said shield residing in conformity with the said exterior surface and in light reflecting relationship with respect to the uncovered portions of the housing and being integral with the ring and annular rib means projecting from the exterior surface of the globular housing and spaced from said neck, a portion of said shield being spun into conformity with the reversely extending portion of said rib for permanently locking said globe and shield in position.

4. An assembly for enclosing a lamp comprising a transparent lamp housing having a neck portion and a portion of substantially regular globular form, a reflector shield of sheet material regularly conform-able over its entire extent to an area of said transparent housing, said area being spaced from said neck portion and having a rib located about its perimeter, said shield having a portion adjacent its entire perimeter spun about said rib and said area of said housing enclosed by said rib being of less extent than 21r multiplied by the square of the radius of said globular portion.

JOHN G. FRANCIS.

CERTIFICATE OF CORRECTION. Patent No. 2,271,856. February}, 19142.

: JOHN G. FRANCIS.

It is hereby certified that error appears in the printed specification of th e above numbered patent requiring correction as follows: Page 2, first column, linefi, for the word "next" read -neck--; and that the said Letters Patent should be read with this correction therein thatthe same may conform to the record of the case in the Patent Office;

Signed and sealed this 28th day of April, A. D. 19h2.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents.

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