US1538175A - Lamp structure - Google Patents

Description

May 19, 1925.

D. H. DEERY LAMP STRUCTURE Filed Juzie 19, 1923 INVENTOR. flow/a hf 060?) Wm. WM.

ADTTORNEY.

Patented May 19, 1925.

U I ED PATENT orr ce.

DANIEL I-I. DEERY, F BRIDGEPOBT, QONNE TIC UT, ASSIGNOB, TO THE D. & H. LAMP 00., or BRIDGEPORT, commonerns, A ooPanrrniin'snIr co ytrosnn or DA hint.

H. nanny AND WILLIAM nnnnnssny.

ten? mus -vas- Applicat ioi fil ed June 19, 1923, $eria1 Ifl'o. 646,356.

ll '0 aZZ "whom it may concern:

Be it known that I, DANIEL I-l. D mer, a citizen of the United States, and a resident of the city of Bridgeport, in the county of F airfield and State of Connecticut, have in: vented certain new and useful Improvements in Lamp Structures, olf which the following is a specification.

The present invention relates to an mproved lamp structure, particularly a taillight for automobiles, and has for an object to provide a device of this character which will produce a clear light ,at the rear of the automobile, and will at the same time brightly and effectually illuminate the number plate, so that the same will be distinctly visible at a relatively great distance.

Another object is to sorelate the lamp and the number plate support, forming .a part thereof, that the light rays will be directed downwardly upon the plate, so that its entire surface will be clearly and uniformly lighted.

A further object is to provide a structure which will withstand constant vibration and shoclewithout danger of fracture or loosening, and which will furthermore be moisture and dust proof.

A still further obiect is to provide a corn struction iu whichthe glass structure will be cushioned a ndprotected against breakage,

andwhich ivill permit of the lens being removed, for the purpose of renewal of the lamp bulb, with facility and without the need of tools, and as readily reassembled.

an embodiment of the invention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings:

Fig. 1 is a perspective view of the lamp structure, according to the present embodiment of the invention;

Fig. 2 is an extended perspective view of the same, and showing the parts thereof in separated relation;

being secured in an opening is a vertical longitudinal sectional responding parts throughout the several figures.

Referring to the drawings, the lamp structure, according to the present embodimentof the invention, comprises a back or mounting plate 10, having is upper portion rounded" to partially conform to a circle, and its lower marginal portion 11 extended an equal distanceeach side from the center and bent forewardly at a slight angle. Lori.- gitudinal slots 12 are provided in' each end of the portion 11 for the purpose of receiving the fastening bolts of the number plate, as'indicat ed in dotted lines in Fig. 1, the number plate being at a slight foreward angle to the plate 10, whereby to be more eii'ectually illuminated by the lamp, and as will hereinafter more fully appear. A pair of holes 13 are provided in the plate l tl to enable it to be attached by rivets or bolts to the rear lamp bracket of an automobile Upon the upper portion of the plate 10 there is mounted a cup-shaped cylindrical lamp casing 1 1 forn'ied of sheet metal, and having its base portion secured to the plate lO by a plurality of rivets 15, and provided With the above and other objects in View,

in the lower half of its cylindrical wall with a parallel-sided opening 16.

A lamp socket 17 is mounted in the casing, I 18 formed in the base of the casing and the plate 10, by soldering or the like, or preferably by peening the edge of the opening 18 intotight relation with the socket, as at 19, Fig. 3.

The socket is preferably disposed midway between the axial center of the casing and its lower extremity, and terminates substantially in acentral planethrough the opening 16. A lamp bulb .20 is fitted therein by means of a bayonet connection 21, and at its outer projecting end the socket is adapted to have conductor wires connected thereto.

A glass cylinder 22 is fitted within the casing, to form a transparent closure for the opening 16, and also, as will presently appear, to tightly and yieldably secure the colored tail-light lens. Between the inner edge of the cylinder 22 and the base of the casing there is interposed a rubber-ring washer 23, and a leaf-spring member 24, having its intermediate portion bowed, and its end portions 25 bent forewardly therefrom and resting upon the rubber ring, the lines upon which the portions 25 are bent being substantially circumferential and concentric to the cylinder wall. The inner edge of the glass cylinder bears down upon the ends of the spring to tension it, and upon the portions of the rubber ring washer not engaged by the spring ends, the washer being compressed beneath the spring, so that the edge of the cylinder is substantially in contact with a. continuous resilient structure formed by the spring and washer.

The foreward edge of the glass cylinder projects slightly with relation to the foreward edge of the casing, and has seated thereon a rubber-ring washer 26, interposed between the cylinder and the convex-faced colored tail-light lens 27. The lens is secured in place by a rim 28, having a flange 29 bent over upon the lens, and slidably engaged upon the outer surface of the casing, being provided at diametrically opposed points with angular bayonet slots 30 having recesses 31 in their locking portions, and adapted to engage diametrically opposed lugs 32 secured to the casing. In order to connect the rim, it is fitted over the lens and upon the casing, and by applying pressure to the rim the glass cylinder is pressed inwardly, compressing the rubber washers 26 and 23 and the spring member to a point permitting the locking portions of the bayonet slots to be turned into engagement with the lugs 32 by rotating the rim upon the casing. The pressure thus produced effectually retains the rim locked, the lugs being seated in the recesses 31. T o disconnect the rim, it is only necessary to press the same inwardly at the same time rotating it upon the casing to bring the entrance portions of the bayonet slot-s into line with the lugs 32.

The resilient supporting of the glass cylinder and lens is such that fracture, breakage or looseness, through constant vibration or shock is entirely prevented, and the interior of the lamp is maintained moisture and dust proof. The provision of resilient means at each end of the glass cylinder is such that the cylinder is resiliently supported longitudinally, the resilient means at one end compensating the resilient means at the other end, so that as one gives the other follows. The lamp is of sturdy construction, is neat in appearance, and may be manufactured by economical fabricating processes.

I have illustrated and described a preferred and satisfactory embodiment of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof, as defined in the appended claims.

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

1. In a lamp, a cylindrical cup shaped casing, a lamp socket supported in the rear wall of said casing, a fragile cylinder in said casing substantially equal to the length of the casing, resilient means interposed between the inner end of said cylinder and said rear wall of the casing to cause the projection of a portion of the forward end of said cylinder forwardly of the forward edge of the casing, a lens at the forward end of the cylinder, resilient means interposed between the: forward projecting end of said cylinder and said lens, a flanged rim engaged upon the forward end of said casing and over the margin of the lens, and means for securing the rim 0n the casing and to compress the resilient means at the rear of said cylinder, the two resilient means maintaining the rim in secured relation and compensating each other, whereby as one gives the other follows.

2. In a lamp, a cylindrical cup-shaped casing having an opening in its cylindrical portion, a lamp socket supported in the rear wall of said casing and within the lower half thereof, a transparent cylinder in said casing open at each end, a leaf spring extending across said casing above said lamp socket and having its ends interposed between the inner end of said cylinder and the rear wall of said casing, a lens at the forward end of said cylinder, at flanged rim engaged upon the forward end of said casing and over the margin of said lens, and means for securing said rim adapted in its secured position through said lens and cylinder to compress said leaf spring, whereby said cylinder is resiliently supported longitudinally.

3. In a lamp, a cylindrical cup-shaped casing having an opening in its cylindrical portion, a lamp socket supported in the rear wall of said casing and within the lower half thereof, a transparent cylinder in said casing open at each end, a leaf spring extending across said casing above said lamp socket and having its ends interposed between the inner end of said cylinder and the rear wall of said casing, the upper and lower edges of said spring being parallel and above and below the central axis of said casing, and its ends being concentric and cylinder to compress said leaf spring, with the cylindrical portion of said casing, a whereby said cylinder is resiliently suplens at the forward end of said cylinder, a ported longitudinally. 1 flanged riin engaged upon the forward end Signed at Bridgeport, county of Fairfield of said casing and over the margin of said and State of Connecticut, this 8th day of? lens, and means for securing said rim adapt- June, 1923.

ed in its secured position through said lens DANIEL H. DEERY.

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