US2385655A - Safety lamp guard - Google Patents

Description

Sept. 25, 1945. w. SCHMIEDER SAFETY LAMP GUARD Filed April 24, 1943 I FIG. 4.

INVENTOR IV/z. LIAM SCHM/EOEQ.

Illl HHI 5 ATTORNEYS Patented Sept. 25, 1945 William Schmieder, Ridgewood, N. 'Y.', assignor to Alexander J. Heidt, New York; N. Y.

Application April 24, 1343, Serial No. 484,323

1 Claim.

This invention relates to improvements in safety 2 lamp: guards of the portable type made of insulating material.

Prior devices of this character with which I am familiarare made Wholly or partly of rubber.

Due to the present shortage of rubber and restrictions as to its use, this material is not available, therefore the primary object of this invention is to construct a safety lamp guard made of fibre material which is an excellent non-conductor of electricity and which is sufficiently rigid to protect the electric lamp from breakage during use of the lamp.

Another feature of the invention resides in a safety lamp guard which is clam'pingly supported in a novel manner upon a standard insulated lamp socket of the portable lamp.

A further feature of the invention is to provide a fibre cage-like guard composed of a series of concentric rings to which radially arranged strips are riveted, the rivets of one of the end rings being utilized to interfit in a groove provided in the guard supporting lamp socket for preventing separation of the guard from the socket in an axial direction.

Other novel features of the invention will become apparent as the following specification is read in conjunction with the accompanying drawing, in which,

Figure 1 is a perspective view of a lamp equipped with the safety guard.

Figure 2 is a vertical sectional View.

Figure 3 is a horizontal sectional view on the line 33 of Figure 2.

Figure 4 is an enlarged detail vertical sectional View on the line 4-4 of Figure 3.

Referring to the drawing by reference characters, the numeral designates a portable lamp in its entirety embodying the features of the invention about to be described. The lamp I!) includes broadly, a lamp socket A, a safety guard B attached to the socket A, and an electric incandescent lamp bulb C.

The socket A is of standard make and includes an outer rubber shell H enclosing the threaded metal shell into which the threaded base of the lamp C is screwed. The rubber shell II is provided with an annular channel l2 of U-shape in cross section and which is disposed adjacent the open end of the socket. Terminal conductor wires l3-l3 extend through the closed end of the socket to facilitate the connection of the lamp H! with a source of electric current.

The safety guard B consists of a cage-like body made of a non-conducting material, such as stiff vulcanized fibre, and includes a continuous .outer end ring is made of fiat fibre, asplit inner end clamping ring. l5 made of fiat fibre and of a smaller diameter than the ring I4, and an intermediate continuous ring [6 and also made of fiat fibre and being of the same or slightly less diameter than the outer end ring 14. I -he rings M,..l5, and it are disposed in substantially concentric relation and are substantially equi-distantly spaced apart. The ends of the split ring E5 are bent outwardly at right angle to the axis of the ring to provide substantially parallel terminal ears i'll1 provided with alined openings B8. A threaded bolt 19 passes through the alined openings l8, there being fibre washers 20-20 between the respective ears and the head of the bolt l9 and a nut 2| threaded to the threaded end of the bolt.

Extending from the split end ring 15 to the continuous end ring M are flat fibre strips 22 arranged in equi-distantly spaced radial relation. The strips 22 are embraced by the continuous rings I l and l 5 so that their flat outer sides flatly fit against the flat inner sides of the said rings. The inner ends of the strips 22 flatly fit against the split clamping ring [5. Rivets 23 pass through the rings l4 and It and through the strips 22 for rigidly securing the strips and rings M and It together. Hollow rivets 24 pass through the inner ends of the strips and through the split clamping ring l5. Mounted on the inner upset ends 25 of the rivets 24 are fibre disks or washers 26 which provide projections which extend inwardly from the inner fiat side of the split ring l5. Thus, the strips 22 are fixedly connected at their points of contact with the rings l4, l5 and it. Due to the difference in diameters of the split ring i5 and intermediate ring Hi, the strips 22 are bent inwardly so that their inner ends will flatly contact the outer fiat side of the ring 15.

As previously mentioned, the safety guard B is supported by the socket A, by reason of the fitting of the split clamping. ring l5 about the rubber shell ll so that the series of projections 26 seat in the channel l2 as best illustrated in Figures 3 and e. The width of the ring I5 is greater than that of the channel so that it overlies and conceals the channel. It will be understood that the split fibre clamping ring possesses a certain resiliency which enables the spreading of the ring to facilitate the seating of the projections into the channel and their separation therefrom. By screwing the nut 2| tight upon the bolt IS, the split clamping ring l5 will be brought into tight clamping engagement with the rubber Shell H and securely held against relative turning movement. By tightly contracting the split ring 15 about the shell I I, the projections 26 will interfit with the walls of the channel l2 and prevent the guard B from being accidentally pulled away from the socket A.

The incandescent lamp C may be inserted through the outer open end of the guard B and its base screwed intov the socket iA. 7 r

In use, the fibre guard B of theportable lamp ID, protects the electric lamp 0 from breakage and due to the di-electric materialfrom which the guard is constructed, short circuits are pre- .i

vented should the guard be accidentally brought in contact with live electrical conductors. The projecting portion of the socket A may serve as a. safe handle by which the portable lamp l0 may be grasped. Shouldit be desired to hang the lamp ID, the ring [4' may be engagedwith a, hook, nail,

or other fixed engageable element.

From the foregoing description, it will be seen that I have provided a simple, inexpensive, safety lamp guard which is a non-conductor of, elec-' tricity, strong and durable to withstand the abuses v of use, and which is constructed of materials now 1 available for general use. 1

' While I have shown and described what I convention, I wish it to be'understood that such changes in construction and design as come within. the scope of the appended claim may be resorted to if desired without departing from the spirit of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

V In a lamp having a lamp receivingsocket provided with an exterior annular channel, a lamp guard including an inner split resilient fibre ring and rigid spaced apart continuous fibre rings,

sider to be the preferred embodiment of my inall of the rings being in substantially concentric relation, fiat fibre strips flatly fitting against the outer side of the split ring and flatly fitting against the continuous rings, metal rivets passing I WILLIAM SCHMIEDER;

Images