Leak-proof light

Claim 2

A sealed electric light comprising a casing having a lens sealed thereto, a socket adapted to receive a light bulb disposed within the casing, an electrical conduit extending into the casing through an opening in the wall thereof for energizing the light bulb, and means sealing the conduit to the casing comprising an elastomeric tube telescoped over and sealingly engaging the conduit, said tube extending through the opening in the casing and being sealed to the wall of the casing at said opening, the means sealing the conduit to the casing comprises means within the elastomeric tube in the zone thereof passing through the openinG in the wall of the casing which expands the tube into sealing engagement with the confronting surface of the wall of the casing at said opening, the casing having a first sleeve secured to the wall of the casing surrounding the opening therein, the means which expands the tube being a second sleeve disposed therewithin radially inwardly of the first sleeve.

Claim 3

A light according to claim 1, wherein the first sleeve extends into the casing from the wall thereof.

Claim 4

A light according to claim 2, wherein the first and second sleeves are of tapered shape and converge in a direction inwardly of the casing.

Claim 5

A light according to claim 3, wherein the axially outer portion of the tube closely embraces the conduit, and comprising annular clamp means axially outwardly of the boot for compressing the tube into sealing engagement with the conduit, the first and second tapered sleeves forming a flexible boot in the portion of the tube immediately outwardly of the wall of the casing through which the tube passes.

Claim 6

A light according to claim 2, wherein the tube has a first, smaller diametered axially outer portion, and a second, larger diametered axially inner portion, said two portions being joined by a transverse annular step, and the second sleeve has a radially outwardly directed annular flange on its axially inner end, the axially outer and inner surfaces of the step being in sealing engagement with the flange on the second sleeve and the axially inner end of the first sleeve.

Claim 7

A light according to claim 5, wherein the socket is telescoped within the tube and lies a substantial distance axially inwardly of the wall of the casing through which the tube extends whereby the tube supports the socket and light bulb and cushions then against vibration.

Claim 8

A light according to claim 6, comprising means within the tube and secured to the inner wall thereof engaging the socket to position it at a predetermined distance from the said wall of the casing.

Claim 9

A light according to claim 1, wherein the socket is mounted upon the axially inner end of the tube.

Claim 10

A light according to claim 8, wherein the casing is made of metal, the socket has a metal shell, and comprising a flexible ground wire connected between the metal shell of the socket inwardly of the inner end of the tube and the casing.

Claim 11

A sealed electric light comprising a casing having a lens sealed thereto, a socket adapted to receive a light bulb disposed within the casing, an electrical conduit extending into the casing through an opening in the wall thereof for energizing the light bulb, means sealing the conduit to the casing comprising an elastomeric tube telescoped over the conduit, extending through the opening in the casing, and sealed to the wall of the casing at said opening, the lens being sealed to the casing by means comprising an annular radially outwardly extending flange on the lens, an annular radially outwardly extending flange on the forward end of the casing, the two flanges being disposed coaxially and having their confronting surfaces lying on similar parallel cones of large apex angle having their apices lying on the common axis of the two flanges, a frustoconical gasket disposed between the confronting surfaces of the flanges, and means for thrusting the lens and casing toward each other along the axis of the flanges.

Claim 12

A sealed electric light comprising a casing having a lens sealed thereto, a socket adapted to receive a light bulb disposed within the casing, an electrical conduit extending into the casing through an opening in the wall thereof for energizing the light bulb, means sealing the conduit to the casing comprising an elastomeric tube telescoped over the conduit, extending through the opening in the casing, and sealed to the wall of the casing at said opening, the lens being sealed to the casing by means comprising an annular radially outwardly extending flange on the lens, an annular radially outwardly extending flange on the forward end of the casing, the two flanges being disposed coaxially and having their confronting surfaces lying on similar parallel cones of large apex angle having their apices lying on the common axis of the two flanges, a frustoconical gasket disposed between the confronting surfaces of the flanges, and means for thrusting the lens and casing toward each other along the axis of the flanges.

Claim 13

A sealed electric light comprising a casing having imperforate side and rear walls, and an imperforate lens sealed to the forward end of the casing, the lens being sealed to the casing by means comprising an annular radially outwardly extending flange on the lens, an annular radially outwardly extending flange on the forward end of the casing, the two flanges being disposed coaxially and having their confronting surfaces lying on similar parallel cones of large apex angle having their apices lying on the common axis of the two flanges, a frustoconical gasket disposed between the confronting surfaces of the flanges, means for thrusting the lens and casIng toward each other along the axis of the flanges, the annular surfaces of said two flanges which are remote from each other being oppositely inclined and converging in a radially outward direction, the means for thrusting the lens and casing toward each other comprising a split ring having a generally V cross section, the ring having opposite annular sides overlying the respective remote surfaces of the annular flanges, and means to pull the opposite ends of the split ring together.

Claim 14

A sealed electric light comprising a casing having imperforate side and rear walls, and an imperforate lens sealed to the forward end of the casing, the lens being sealed to the casing by means comprising an annular radially outwardly extending flange on the lens, an annular radially outwardly extending flange on the forward end of the casing, the two flanges being disposed coaxially and having their confronting surfaces lying on similar parallel cones of large apex angle having their apices lying on the common axis of the two flanges, a frustoconical gasket disposed between the confronting surfaces of the flanges, means for thrusting the lens and casIng toward each other along the axis of the flanges, the annular surfaces of said two flanges which are remote from each other being oppositely inclined and converging in a radially outward direction, the means for thrusting the lens and casing toward each other comprising a split ring having a generally V cross section, the ring having opposite annular sides overlying the respective remote surfaces of the annular flanges, and means to pull the opposite ends of the split ring together.