US1694564A - Lamp - Google Patents

Description

Dec. 11, 1928. 1,694,564

H. w. SISSON LAIP Filed May 16, 1927 [22062; F fZZZffg J1 621519012 55 fl/uiam), 190M! a Miam Patented Dec. 11, 1928,

UNITED STATES PATENT GFFICE.

LAMP.

Application filed May is,

This invention relates to lamps and, although more Imrticularly to headlight lamps for motor vehicles and the like, it is to be understood that the lamp of the present invention may be employed as and where desired.

The object of the present invention is the provision of a generally improved and simplified lamp that may be economically produced and a structure of pleasing appearance, in which convenient access to the interior of the lamp is afforded and better protection against the entry of water, dust and other foreign matter into the interior of the lamp is provided.

The invention is illustrated in the accompanying drawings, in which 1 is a front elevational view of a lamp embodying the present. invention;

Fig. 2 is a vertical section taken on the line 22 of Fig. 1; and

Fig. 3 is a fragmentary detail section of another embodiment of the invention.

Referring to the drawing, the embodiment of the invention shown in Figs. 1 and 2 comprises a shell or casing 5, which may be formed of sheet metal of the desired gauge, or other suitable or preferred stock and which is preferably of spherical contour, closed at the back and open at the front at 6 for the projection of the light rays th-erethrough.

The open front of the casing 5 may be formed by truncating the front of the casing and the wall of the casing surrounding the opening 6 formed by the truncation is turned in at 8, with the inner marginal edge of the iii-turned portion 8 turned radially at 9, with respect to the annular portion 8 to form an annular flange to which the lens 10 may be clamped. The marginal edge of the reflector 12 may also be clamped to the flange 9. The forwardly converging annular space 14- between the iii-turned portion 8 and the adjacent wall of the casing 5 is shown as be ing open, although it may be provided with a filler or suitable reenforcing means for reei'iforcing and strengthening the in-turned portion 8. The filler may be in the form of a ring which may be split or made in sections so that it can be contracted to get it into the open front of the casing.

The inturned portion 8 defines a circular opening 15 dimensioned to receive the circular periphery of the lens 10, and this inturned portion 8 is threaded at 16 to receive a bezel or clamping ring 18 which is corre- 1927. Serial No. 191,611.

spondingly threaded to be screwed into the threaded portion of the opening 15 and clamp the margins of the lens 10 and reflector 12 to the seating flange 9. The bezel or clampmg ring 18 may be provided with diametrically opposite openings 20 which are adapted to he engaged by a spanner wrench or other suitable tool for screwing the ring 18 into place and removing it from the in-turned opening defining portion. One or more gaskets 22 of suitable yielding material may be interposed between the ring 18 and the adj a cent marginal edge of the lens 10 and between the lens 10 and reflector 12 to permit screwing the ring 18 up tight without injuring the adjacent edge of the lens and to provide a moisture and dust tight joint. The outwardly presented surface 23 of the ring 18 may be rounded as shown, or it may be flattened off or otherwise finished to give the desired pleasing appearance.

The reflector 12 may be parabolic or of any suitable or preferred form with the front marginal flange 25 clamped between the flange 9 and the ring 18. The curvature of the reflector is, for convenience, illustrated more or less diagrammatically. The inner concave surface 26 of the reflector 12 may be polished or finished, as desired, and the refiector is provided with a rearwardly turned hub 28, which may be formed integrally therewith, as shown. The hub 28 may be separate and suitably attached to the reflector, if desired. The hub 28 supports a member 30 which passes therethrough and has a socket portion 32 for making electrical connection with the lamp 34 and for supporting the lamp in the focus of the reflector. The ntxember 30 is slidable axially in the hub 28 and is splined or held against turning in the hub 28 by suitable spline means indicated generally at 30. The attachment of the lamp in the socket portion32 may be of the pin and slot type, as shown at 35, or this connection may be of any other suitable or preferred form. The conductors 36 for supplying the lamp 3-1, are led into the casing through a suitable insulating bushing 38 and may enter the member 30 at 89, extending therethrough to the contacts in the socket portion 32 for cooperation with the lamp contacts, as well understood in the art.

The rear end of the member 30 has an internally threaded recess 40 into which a stem 12 is threaded at 18. The stem 42 is rotatable at 15 in the back of the casing 5 and is held agairst axial or longitudinal movement as by the head 46 and cooperating nut 46, as shown. The rear exposed end of the head 46 of the stem i2 is notched, as shown, to be engaged by a screw driver or other suitable tool for turning the stem 12 to thread the membcr 30 rearwardly or forwardly thereon and thereby adjust the position of the lamp 34 with respect to the reflector 12.

The lens 10 may be provided with an antiglarc member 50, such as disclosed in my prior Patent No. 1,588,816, granted June 28, 1926.

Any suitable mounting means may be pro vided for the lamp, such as, for example, a bracket 52. suitably secured to the bottom of the casing 5 and provided with a split clamp 53 for attachment to the cross rod or other support for the lamp. It is to be understood that the bracket shown is merely illustrative and that the standard S. A. E. mounting or any other suitable or preferred mounting n'iay be employed.

It will be noted that the spherical wall of the casing 5 at the open front of the lamp extends forwardly past the centerof curvature of the shell 5 and is thereby re-curved forwardly and inwardly at 58 to the opening 15 at the front of the lamp. This directs the top of the front portion 58 of the casing 5 downwardly and provides an excellent water she'd for directing ater away from the front opening and lens mounting. The bezel ring 18 also excludes moisture, dust and other foreign matter from the inside of the lamp. The parts are all solid and firmly held, and convenient access to the inside of the lamp is afforded by removing the bezel ring 18. The manner in which access to the inside of the lamp is afforded, permits making the shell or casing 5 in one piece and without joints or seams which further increases the solidity of the lamp and further protects the inside against the entry of water, dust and other foreign matter.

Access to the lamp 34, removal of the lens 10 and even removal of the reflector 12 is permitted, merely by unscrewing the bezel ring 18 and these parts may be all clamped firmly in place merely by replacing them and drawing up the bezel ring to clamp them to the flange 9 through the gaskets 22. Furthermore, the joint is set in or disposed inwardly of the inwardly curved forward portion of the casing 5.

The lens 10 may have the features of my (to-pending application. Serial No. 184,452, filed April 18. 1927, embodied therein.

The casing 5 may be spun or otherwise shaped over a suitable core, which may be made up in sections to permit removal from the front opening 6 of the casing.

In Fig. 8 the inwardly extending screw threaded portion 8. instead of being formed by turning in the front marginal edge of the casings, as before, is in the form of a sepa rate ring which may be welded or otherwise suitably secured or attached at 62, preferably rigidly or fixedly to the adjacent inner surface of the casing 5. The ring 8 maybe split or sectionalized at 63 for introduction through the opening 6. A spline or other suitable connection. may be provided between the ring 8 and the adjacent inner surface of the casing 5 for holding the ring against turning in the casing or for recnforcing the joint between the ring and casing against turning or rotational displacen'ient of the ring 8.

The radial lens and reflector mounting or seating flange 9 is, in the embodiment of Fig. 3, formed on or carried by the ring 8. The marginal flange of the reflector and the margin of the lens may be clamped to the flange 9 by the bezel ring 18 threaded into the inwardly extending portion 8 at 16, as before. The bezel ring may in either form be secured against unintentional loosening or turning by aset screw 65, as shown in Fig. 3.

I claim 1. In a lamp, a casing of spherical contour truncated forwardly of its center to form a light projection opening and having an inwardly extending mounting portion, a radial shoulder at the inner end of said inwardly extending portion, a bezel ring threaded from the front of the lamp into said inwardly extending portion, and a lens clamped between said shoulder and said rin 2. In a lamp, a casing of spherical contour truncated forwardly of its center to form a light projection opening and having an in wardly extending mounting portion, a radial shoulder at the inner end of said inwardly extending portion, a bezel ring threaded into said inwardly extending portion from the front'of the lamp, a lens clamped between said shoulder and said ring. and a reflector disposed within said casing and having a marginal flange clamped with said lens between said shoulder and said bezel ring.

3. In a lamp, casing of spherical cont-our truncated forwardly of its center with a por tion turned inwardly to receive a lens and a bezel ring, a radial flange at the inner end of said in-turned portion, a bezel ring threaded into said in-turned portion from the front of the lamp, a lens clamped marginally between said flange and said bezel ring, a reflector disposed within said casing and having a marginal flange clamped with said lens between said first flange and said bezel ring, said reflector having a tubular hub, a lamp support mounted in said tubular hub, a lamp carried thereby, and means rotatably journaled and fixed axially in the back of the lamp casing for external access and having threaded engagement with said lamp support for adjust ng the position of said lamp, the rotatably journaled and axially fixed portion Ill) of said means being countersunk in the wall of the casing and flush with the rear surface thereof.

4. In a lamp, a casing of spherical contour truncated forwardly of its center with a portion turned inwardly to receive a lens and a bezel ring, a radial flange at the inner end of said in-turned portion, a bezel. ring threaded into said intnrned portion from the front of the lamp, a lens clamped marginally between said flange and said bezel rin a reflector disposed within said casing and having a marginal flange clamped with said lens between said first flange and said bezel ring, said reflector having a tubular hub, a lamp support mounted in said tubular hub, a lamp carried thereby, means rotatably journaled and fixed. axially in the back of the lamp casing for external access and having threaded engagement with said lamp support for adjusting the position of said lamp, the rotatably journaled axially fixed portion of said means being countersunk in the wall of the casing and flush with the rear surface thereof, and conductor means led in through said casing and through said lamp support to said lamp.

5. In a lamp, a one-piece casing closed at the back and open at the front with the margin of the casing about the open front having a portion turned inwardly to receive a lens and a bezel ring, a radial flange at the inner end of said inturned portion, a bezel ring threaded into said in-turned portionfrom the front of the lamp, and a lens clamped between said flange and said bezel ring, the marginal portion surrounding the opening at the front of the casing being directed inwardly to form a water shed for directing water away from the open front of the casing and from the lens mounting.

6. In a lamp, a one-piece casing closed at the back and open at the front with the margin of the casing about the open front turned in to receive a lens and a bezel ring, a radial flange at the inner end of said iii-turned portion, a bezel ring threaded into said inturned portion from the front of the lamp, a lens clamped between said flange and said bezel ring, the marginal portion surrounding the opening at the front of the casing being directed inwardly to form a water shed for directing water away from the open front of the casing and from the lens mounting, and a reflector disposed within said casing and having a marginal flange clamped with said lens between said first flange and said bezel ring.

In witness whereof, I hereunto subscribe my name this 10th day of May, 1927.

HARRY W. SISSON.

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