US2703000A - Means for mounting inverted incandescent mantles - Google Patents

Description

March 1, 1955 c, HEBARD 2,703,000

MEANS FOR MOUNTING INVERTED INCANDESCENT MANTLES Filed D90. 6, 1950 b; W3 c United States Patent MEANS FOR MOUNTING INVERTED INCANDESCENT MANTLES Hugh Charles Hebard, Northwood, England Application December 6, 1950, Serial No. 199,385

4 Claims. (Cl. 67-103) This invention relates to means for mounting inverted incandescent mantles, such as those used in pressure lamps, in operative position and has for'its object to provide an improved device which is simple to manufacture and to attach to a mantle and which is so designed that no mechanical manipulation is necessary to secure the device with a mantle depending from it in operative position or in removal from such position.

According to the invention a device for operatively mounting an inverted incandescent mantle comprises a ring formed externally to facilitate attachment thereto of the upper end of the mantle and formed internally with integral devices adapted to make engagement externally of the lower end of a mixing tube, or a burner head at the lower end of such tube, for the purpose of suspending the mantle automatically in the correct position relatively to the fuel opening at the base of said tube or burner head.

Reference will now be made to the accompanying drawings which illustrate a mantle mounting constructed according to the invention and in which:

Fig. 1 is an elevation, partly in section, showing a mantle operatively positioned,

Fig. 2 is a plan of the ring from which the mantle is suspended, and

Fig. 3 is a perspective view of the ring shown in Fig. 2.

In the construction illustrated a device for operatively mounting an inverted incandescent mantle a comprises a ring 12 formed from sheet metal having outwardly extending peripheral flanges c and d integral with its upper and lower edges respectively. These flanges form with the body of the ring a channel (k in Fig. 3) in which the upper edge e of the mantle can conveniently be secured by any usual means such as a binding cord or wire 1.

On the inner surface of the ring b are disposed inwardly projecting spring members in the form of tongues g whose purpose is to engage the exterior of the mixing tube or burner head h when the ring is pushed upwards and over such component to mount the mantle in its operative position as shown in Fig. 1.

A convenient method of manufacturing the ring above described is by a series of pressing operations during which the flanges c and d and a number of slits extending partially through the depth of the ring and parallel to its axis are formed. These slits are made in pairs and the members of each pair are connected at one end by a slit extending partially circumferentially of the ring so as to form within them the tongues g (conveniently four in number). The tongues are bent inwardly so that after attachment of the mantle to the ring the tongues extend inwardly and downwardly of the completed fitting. The

2,703,000 Patented Mar. 1, 1955 ring is made of such dimensions that its internal diameter forms a sliding fit over the mixing tube h or other component over which it is mounted and in pushing the ring into operative position the spring tongues g tend to be pushed outwards by a beading i formed around the lower end of the mixing tube or burner head and to engage above said beading as shown in Fig. 1. In this way the tongues are caused to form additional positive locking means to hold the ring and mantle firmly in the operative position.

The engagement of the tongues with the beading ensures that the mantle is automatically suspended in the correct position relatively to the fuel opening at the lower end of the mixing tube or burner head, the nature of the engagement between the tongues and beading being such that a sharp downward pull on the ring will force the tongues outwards and thereby enable the entire mantle fitting to be detached.

What I claim is:

1. A holder for an inverted incandescent mantle comprising a ring adapted to fit over and engage for support a flange on the lower part of the burner head of an incandescent mantle lamp, said ring having an outer sur face defining a channel to receive the upper end of a mantle and having inwardly and downwardly projecting resilient tongues around its inner surface presenting free ends adapted to engage said flange on the burner head in a manner compacting the means for supporting the mantle on said ring and the means for supporting said ring on the burner head within the upper and lower confines of said ring.

2. A holder in accordance with claim 1, wherein said channel is defined by two outwardly extending peripherical flanges provided on said ring.

' 3. A holder in accordance with claim 1, in which said resilient tongues around the inner surface of said ring are tongues cut out of the base portion of said ring and bent inwardly.

4. Means for supporting an inverted incandescent mantle on a burner head comprising, in combination, a ring adapted to fit over and engage for support a flange on the lower end of a burner head, said ring defining a channel around its outer surface to receive the upper end of a mantle for support therein and presenting resilient tongues extending inwardly from said channel, and a beaded section on the lower outer portion of said burner head adapted to engage the free ends of said resilient tongues to support said mantle in a manner compacting the means for supporting the mantle on said ring and the means for supporting said ring on the burner head within the upper and lower confines of said ring.

References Cited in the file of this patent UNITED STATES PATENTS 870,753 Wiederhold Nov. 12, 1907 1,227,260 Gotty May 22, 1917 2,023,467 Davis Dec. 10, 1938 FOREIGN PATENTS 21,791 Great Britain of 1908 26,373 Great Britain 1904 26,484 Great Britain Dec. 19, 1905 37,955 Switzerland Oct. 14, 1906

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