|Publication number||US2395756 A|
|Publication date||Feb 26, 1946|
|Filing date||Oct 29, 1943|
|Priority date||Oct 29, 1943|
|Publication number||US 2395756 A, US 2395756A, US-A-2395756, US2395756 A, US2395756A|
|Inventors||Chauncey Parsons George|
|Original Assignee||Chauncey Parsons George|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (6), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Patented Feb. 26, 1946 UNITED STATES -PATENT OFFICE SHIP LIGHT George Chauncey Parsons, Long Beach, Calif. Application October 29, 1943, Serial No. 508,166
` 2 Claims.
This invention relates to improvements in lamp and particularly relates to improvements in ship lamps. 4
An object of the invention is to provide a simplified type of ship lamp in which the lens of the lamp is retained securely but without being subjected to stresses that might tend to crack or break the lens.
Another object of the invention is to provide a ship lamp formed of relatively few parts which are readily produced and can easily be removed and replaced when it is necessary to repair the lamp.
.A further object of the invention is to provide a ship lamp in which the lens retaining portions are integral with the cover and the base of the lamp and so arranged that the lens can be removed easily for cleaning or replacement.
Other objects of the invention will become apparent from the following description of a typical form of ship lamp embodying the present invention.
Generally, lamps embodying the present invention are characterized by a stamped or spun metal cover and base formed of a plurality of shells having inturned, grooved anges in opposed relationship for receiving and retaining the lens of the lamp. The grooves in the fianges preferably are somewhat wider than the -th'ckness of the edges of the lens in order to permit relative ex pansion and contraction of these elements without subjecting the lens to excessive stresses. The base and cover of the lamp may be retained in spaced apart, and clamping relation to the lens by means of the rods which, together with suitably spaced rings, form a protective cage for the lens.
The relationship of the lens, the base and the cover is such that the lens-receiving grooves can be provided with suitable render the joints between these elements watertight to protect the light therein.
For a better Understanding of the present invention, reference may be had to the accompanying drawing in which the single figure is a view in side elevation and partly in vertical section of a typical form of ship lamp embodying thepresent invention.
The ship lamp chosen for illustrating the present invention includes a base I ll, a cover ll, a lens l2 there-between and a lamp base and sockt |3 mounted on the base I 0. The lens |2 is protected by means of a cage |4 interconnecting the cover Il and the base o.
The base n of the lamp includes two shells |5 and !6 formed, preferably, of sheet 'metal by gaskets or caulking to stamping, spinning or in any other suitable way. The shell [5 is generally cup-shaped having a fiat disc-like base l'l, a cylindrical wall portion |8 and a. radially extending flange IS at the upper edge of the wall portion l8.
The shell !6 has a base fiange 20 overlying the fiange |9 of the shell !5, a generally upwardly tapered wall portion 2l and an inwardly directed fiange 22 provided with an annular groove 23 for receiving the lower end of the tubular "Fresnel" type of lens I 2. While a circular tubular lens is illustrated, it will be understood that lenses of other shapes may be used,` for example, square, triangular, or partially curved and partially fiat.
The cover Il of the lamp includes a pair of shells 24 and 25, preferably formed of metal by stamping or spinning. The upper shell 24 i gen erally dome-like or concavo-convex and has a centrally located access opening which is Secured, by soldering or ternally threaded annular ring 21.
A U-shaped handle 28 for the lamp has its ends Secured ina disc-like plate 29 forming a closure for the access opening 26. The plate 29 is provided with a flange 30 overlyin the ring 21 and an internally threaded collar 3| threaded into the ring 21. A gasket 32 may be interposed between the flange 30 and the ring 21 to render the closure watertight.
The shell 24 is provided with a flange 33 at its lower edge that overlies a similar flange 34 at the upper edge of the generally conical, downwardly tapering wall 35 of the shell 25. At the lower edge of the wall 35 is an inwardly directed fiange 36 having an annular groove 37 therein for receiving loosely the upper edge of the lens 26 in its top in welding, an in- In order to retain the shells I 5, IS and the shells 24 and 25 together and in retaining relationship to the lens !2, the cage !4 is formed of a plurality of vertically extending rods 38 having threaded end portions 38a and 381) that project through aligned apertures 39 in the fianges of the shells l5, I 6, 24 and 25. The threaded portions 38a and 38b receive the nuts 40 above and below the flanges on the shells and permit adjustment of the spacing of the base 10, the cover ll, as well as clamping the fianges together. In order to render the joints between the flanges 18 and 20 and the flanges 33 and 34 watertight, the ring gaskets 4l may be interposed between the fianges.
The lens |2 may be sealed in watertight relationships to the fianges 22 and 36 by means of a packing 42 of a suitable caulking composition, for example, litharge and glycerine, pressed into the grooves 23 and 31 outwardly of the lens !2 or by means of a suitable gasket formed of rubber or other comparable material (not shown) between the fianges 22 and 36 and the ends of the lens 12.
The above described mounting for the lens afiords substantial protection for the lens 12 `and permits adjustment of the cover ll and base n to accommodate their spacing to lenses of difierent lengths. More'over, a certain freedom 'of'expansion and contraction of thevarious' elements is permitted, thereby relieving the lens of stresses that might cause it to break.
The lens l2 may be protected further by'means of the rings 44 of wire or metal rod that are supported within the rods 38 bymeansof the clips 45, These clips include a center band portion 450, bent partially around the rods 38 and end band portions 45b that are bent around'the rings 44 on opposite sides of the rods 38. If desired, the clips 45 may be welded or soldered to the rod's`38 andthe rings 44 of the cage l4.
Thelig'ht source for'the lamp may be of any deslred type, for example, an oil lamp or an electric light. In the `form of the invention illustrated, the ship lamp is provided with an electric bu1b"4'6`supported in the base and socket portion l`3. If lan oillamp is used, the base and socket portionls and the rbulb 48 are omitted and a detac'hable oil lamp and chimneyare .subst'tuted therefor and proper ventilating openings and a suitably'baffied flue are provided. The 'flue may be mounted on or substituted for the plateZQ.
The base .andsocket portion !3 may include a cnp-shaped shell 41 tormed of i nsulating material,'having abase lange 4la that is secured to the base ll of the shell !5 by means of *screws 48 or bolts. The socket 49 for the bulb 45 may be of eonventional type andis secured to the top of the shell 41. .i
:The provision of the removable plate 29 for closing .the 'access opening 26 .permits ready 'removal ;and insertion of the lamp bulb 46 without takingdown the entire lamp.
The wiring forthe` socket-49 may pass through anlopening .inthe shell 47 and a gland 50 in the wall la of the'base shell !5. The gland 50 is packed to render it watertight 'so that leakage around the gland or between the gland 'and'the wiring is prevented. i
The lamp may be provided with lashing rings 5l, if desired. These rings -5l are retained on the lamp by means -of theu-clips 52 tstraddling the anges 9,-2o and the fianges 33-and 34. The
clips 52 have apertures therein for receiving the rods 38. The nuts engage the outer surfaces of the clips 52 and lock them in position.
The above described ship lamp is simple to produce, is sturdy, and the provision of the separable shells making up the base and cover ll of the lamp permits the ormation of the inwardly projecting fianges for receiving the lens l2. Inasmuch as the cover and base project outwardly beyond the lens 12, additional protectionis affo'rded the lens and 'additional space is provided to allow for relative expansion and contraction of the parts. Moreover, every ele- :ment of the lamp can be detached and replaced,
if damaged, without requiring replacement of other as'sociated, undamaged parts.
It willbe understood, of course, that the lamps can be modified considerably in the shape and size of the parts. Therefore, the above-described embcdiment of the invention should be considered as illustrative'of the invention and not as limiting the scope of the following claims.
1. A ship lamp comprising a base having a bottom shell provided with substantially -flat, disc-like bottom, an upwardly extending annular sidewall and an outwardly extending flange at the upper edge of said side wall and a second annular shell having an outwardly extending fiange overlying the fiange on said bottom shell, an upwardly tapered side wall, and an inwardly extending flange at its upper edge; a cover having a dcme-shaped top .shell provided with an outwardly extending flange at its edge and an aperture in its center zone, a detachable -closure member for said aperture, and another annular shell having an -outwardly extending ange unclerlying the fiange in said top shell, a downwardly .tapered side -wall, and an inwardly extending flange at its lower edge; a tubular lens i-nterposed between said inwardly extending fianges; means forming grooves in said inwardly extend'ng flange for receiving the ends of said lens; and means ext-ending through and 'between the .outwardly extending flanges for clamping .said fianges of said baseshells together, 'clamping the fianges ofsaidcover she'lls together, and retaining said cover and base in spaced apart relation toretain said lens in saidgrooves.
2. The shiplamp set orth in claim :1, in which said detachable closure is'provided with a handle for supporting said lamp.
GEORGE CHAUNCEY PARSONS.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2740038 *||Sep 25, 1952||Mar 27, 1956||Carrie John||Ship's navigational light|
|US4638411 *||Oct 4, 1985||Jan 20, 1987||Adb-Alnaco, Inc.||Modular high-intensity elevated runway edge or threshold light|
|US5224773 *||Mar 25, 1991||Jul 6, 1993||Zeni Lite Buoy Company, Ltd.||Lantern and a lens for the same|
|US6048083 *||Jun 30, 1995||Apr 11, 2000||Mcdermott; Kevin||Bent focal line lighting device|
|US20050146875 *||Jan 7, 2004||Jul 7, 2005||Tideland Signal Corporation||Side-emitting led marine signaling device|
|WO2005067528A2 *||Jan 3, 2005||Jul 28, 2005||Tideland Signal Corp||A side-emitting led marine signaling device|
|International Classification||F21V3/00, B63B45/00|
|Cooperative Classification||B63B2725/00, B63B45/00, F21V3/00|