US 1507742 A
Description (OCR text may contain errors)
Sept. 9 1924. 1,507,742
F. c. KOLLATH ET AL LAMP AND GUARD HANDLE Filed Nov. 17, 1923.
Patented Sept. 9, 1924.
UNITED STATES PATENT OFFICE.
FRANCIS C. KQ'LLATH AND EDWARD M. SCHOENING, OF CHICAGO, ILLINOIS.
LAMP AND GUARD HANDLE.
Application filed November 17, 1923. Serial No. 675,276.
To all whom it may concern:
'Be it known that we, FRANCIS C. KOLLATH and EDWARD M. SCHOENING, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Lamps and Guard Handles, of which the following is a specification.
Our invention relates to handles for electric lamps and lamp guards, especially of that type wherein the handle is composed of flexible rubber. The general object of the invention is to provide a device of this character which shall be easily operated, durable, and capable of securely holding the lamp and guard in proper relation to each other and to the handle. One of the specific objects of the invention is to rovide an internal collar near the forwar end designed to enter the groove in the socket for retaining the latter in place. Another object is to provide an annular groove or depression at the same point-on the handle, but on the outside, for receiving a clamping ring which when in position will prevent the socket from being withdrawn. Still another object is to rovide a handle in which the socket receiving chamber is elongated toward the rear for accommodating a knot in the electric conductor. It is also our purpose to form a shoulder at the inner end of this chamber to form a stop against which the knot may abut, thus relieving the socket of any rearward strain on the electric conductors. Still another object is to so form the passage at the rear of the handle that adhesive tape, wound around the conductors, may be accommodated.
We accomplish our ob'ects by" the construction illustrated in t e accompanying drawing in which- Figure 1 1s a side view of the complete I device showing a lamp in position.
Figure 2 is an enlarged view of the arts shown in Figure 1, the handle being s own in axial section.
Figure 3 is an axial section of'the handle alone; and
Figure 4 is a perspective view of a standard t pe of socket suitable for use with our hande..
Like numerals denote like parts throughout the several views.
The handle itself consists of a single piece of flexible rubber and by flexible we mean rubber which is resilient and comparatively soft so that it may bend and stretch within reasonable limits and form a cushion for absorbing any shocks and jars which may occur incidentally to use in a shop or factory. This handle consists of a forward section 1 and a butt or rear section 2. The butt is comparatively thick so that it may afiord a firm and easy grip for the user. It has a longitudinal passage 3 for accommodating the electric conductors 4. This passage is enlarged at the point 6 for accommodating the adhesive tape 7 which in prac tice may be wrapped around the conductors.
At the forward portion the handle has a chamber 10 near the mouth of which is an internal collar 12 adapted to fit into a corresponding annular groove 14 in the lamp socket 15. This lamp socket is of known design and hence need not be described except to say that it is internally threaded near the forward end for receiving the threaded butt of a lamp bulb 16. The conductors 4 pass out through the rear end of the socket in the usual manner.
Chamber 10 is elongated at the inner end in the sense of being longer than the socket, the purpose being to accommodate a knot 18 formed in the conductors behind the socket. A shoulder 20 is formed at the junction of the chamber 10 and portion 6 of the passage 3. .This shoulder is annular and forms an abutment against which the knot may seat .when tension is exerted on the conductors in Wl'llCh may be secured by a screw 26 as shown in Figure '1. When this ring is clamped in place it holds the collar 12 firmly seated in the groove 14 of the socket, thus preventing the latter from being withdrawn and holding-it firmly in place. While this clamping ring may be a se arate piece it will ordinaril form art 0 a lamp guard 30 made of wlre and orming a cage around the lamp in the usual-manner.
In practice, when the parts are assembled as shown in Fi res 1 and 2 the rubber performs thedua function of cushioning the lamp to prevent breaka e of the filament and a convenient handle y which the lamp may be manipulated. When the clamping ring 24 is in position the socket and lamp will be firmly held and the socket cannot be withdrawn from the handle, but when the ring is removed the socket may be removed by merely exerting an outward pull. As
the rubber is resilient the collar 12 will yield and permit the socket to be withdrawn. The shoulder erforms a useful function in forming an a utment for the knot 18.
f It often happens in practice that the conductors .will be jerked backward, but when this happens with our device the knot in the conductors will seat against the. shoulder and prevent any strain from reaching the socket or the devices by which the socket is secured to the conductors.
From the foregoing it will be evident that our device is simple to manufacture and yet is extremely practical and eflicient 1 I use.
we claim as new and desire Having'thus described our invention what tojsecure'by Letters Patent is:
1. A handle for portable electric lamps and guards, consisting 'of a single piece. of flexible rubber having a chamber for accommodating the lamp socket, and a passage of reduced diameter extending from sai chamber to the rear end of the handle for accommodating the electric conductors, the handle having, an internal collar near its forward end and a corresponding annular depression on the outside, the collar for retaining the lamp socket and the depression for accommodatinga clamping ring for holding the collar to its work.
2. A one-piece rubber handle for electric lamps, consisting of flexible rubber-having a chamber for accommodating the lamp socket and a passage of reduced diameter extending rearward from the said chamber for accommodating the electric conductors, the handle having an internal collar near its ;forward end for retaining the socket in position, said chamber being axially elongated for accommodating a knot in the conductors,
for holding the socket near the forward end of the handle, the chamber being axially elongated at the inner end for accommodating a knot in the conductors behind the socket.
In wltness whereof, we have hereunto subscribed our names.
FRANCIS O. KOLLATH. EDWARD M. SOHOENING.