US 2715216 A
Description (OCR text may contain errors)
g- 9, 1955 J. A. HOWENSTINE 2,715,216
INSULATOR AND SOCKET ASSEMBLY FOR FLUORESCENT TUBES Filed Oct. 18, 1952 INVENTOR. JAMES A. HOWENST/NE I :lQ.5. y:
United States Patent INSULATOR AND SOCKET ASSEMBLY FOR FLUORESCENT TUBES James A. Howenstine, Lima, Ohio, assignor to Neon Products, Inc., Lima, Ohio, a corporation of Ohio Application October 18, 1952, Serial No. 315,501
1 Claim. (Cl. 339275) This invention relates to insulators provided with sockets adapted for use at the ends of tubular fluorescent lights to both support the lights and provide a means for connecting the lights to operating voltage.
An abject of this invention is to provide an insulator having a socket and a spring so arranged that when a pair of insulators is placed to receive the opposite ends of a tubular fluorescent light, the light is yieldingly supported thereby and provided with positive electrical contact with the voltage conductors connected thereto.
A further object of this invention is to provide an insulator of this type in which the lead-in wire and terminal contact are housed inside a sturdy insulator body.
A further object of this invention is to provide a socket which is simple and inexpensive to construct and which is strong and durable.
The above and other objects and features of the invention will in part be obvious, and will in part be apparent from the following detailed description, and the drawing, in which:
Figure 1 is a view in side elevation, partly broken away and in section showing a tubular fluorescent light supported at its ends in sockets formed in insulators constructed in accordance with embodiments of this invention;
Fig. 2 is a view in section taken along a line II--II in Fig. 1;
Fig. 3 is a perspective view showing a terminal contact which forms a part of the socket and insulator as sembly;
Fig. 4 is a view in lengthwise section of the contact member in place at an end of a conductor wire; and
Fig. 5 is a view in section taken along a line V-V in Fig. 4.
In the following detailed description, and the drawing, like reference characters indicate like parts.
In Fig. l a tubular fluorescent tube of the instant start type and having electrode or terminal lugs 12 at its opposite ends, is shown supported by insulators 13 and 14. Insulators 13 and 14 are provided with sockets 15 and 16, respectively, for receiving the terminal lugs 12 of the tube.
The insulators 13 and 14 are supported by angle members 17 and 18, respectively. Each insulator is made of suitable refractory such as suitable fire clay or porcelain.
The insulator 14 comprises a shank 19 having a disclike flange or head 21 at one end. Socket 116 in the head end of insulator 14, has a diameter sufficient to provide ample room for one of the terminal lugs 12. The insulator 14 is provided with a bore 22 which extends through the head and shank thereof to accommodate an insulated lead-in wire 23. The socket 16 is formed by a counterbore portion at the head end thereof.
The bare or stripped end 23 of the lead-in wire 23 extends into a contact member 24 of funnel-shape. The bare end of the lead-in wire is received in an elongated shank 26 of contact member 24. As shown in Fig. 5, the shank of the contact member is crirnped or squeezed onto the bare end of the wire to hold the contact member on the wire. After contact member 24 has been thus secured to the exposed lead-in wire, it is dipped in molten solder metal so that a thin coat 27 of solder metal is formed on the surface of the contact member. Solder metal also fills the interstices between conductor wire 23' and the shank 26 of the contact member.
Contact member 24 has an enlarged head 28 that nests in the socket 16, as shown in Fig. 1. The conductor is held in place with the head of the contact member in socket 16 by means of a clip 31. As shown in Figs. 1 and 2, clip 31 includes a channel-shaped metal strip 32 and plates 33 of fibre board or other similar insulating material. The outer edges of the fibre board strips 33 are held in the channel member 32, while the inner edges thereof grip the insulation carried portion of the conductor 23. The channel member 32 holds the strips 33 in engagement with the conductor 23. The clip 31 engages the rear or outer end of insulator 14 to hold the socket member in position.
In order that insulator 14 may be yieldably supported in angle plate 18 to facilitate the placing of light tube 10 therein or removing it therefrom, the shank of insulator 14 is provided with a coil spring 36 and a retainer 37. The spring embraces the shank of the insulator and bears on angle plate 18. The retainer fits in a groove 38 in the insulator and is engageable with the opposite face of angle plate 18. When the insulator is mounted in a hole or aperture 41 in one flange 42 of the angle plate 18, the spring is located between the flanged head 21 and the flange 42. When insulator shank 19 extends through opening 41, spring 36 is compressed and is held in compression when the retainer 37 has been placed as shown.
The insulator 13 is generally of the same construction as the insulator 14 with the exception that the shank 43 thereof is shorter than the shank of insulator 14 and the insulator 13 has no spring for resiliently supporting the same. Thus, insulator 13 is stationary in its supporting flange 44, While insulator 14 may be pushed to the right as shown in Fig. l, to compress spring 36 when lamp is to be inserted or removed.
The socket, insulator and spring arrangement shown supports tubular fluorescent lights conveniently at their opposite ends while at the same time providing positive electric contact therefor.
The socket insulators described above and illustrated in the drawing are subject to structural modification without departing from the spirit and scope of the appended claim.
Having described my invention, what I claim as new and desire to protect by Letters Patent is:
A terminal for an end of an electrical conductor which comprises a tubular funnel-shaped contact member having an elongated shank and an enlarged flared end portion, one end of the conductor extending into the shank of the contact member and terminating at the flared end portion thereof, and a thin coating of solder covering the inner and outer surfaces of the flared end and shank of said funnel-shaped member, the solder surface adjacent said conductor joining the shank and conductor and securing the contact member on the conductor and forming an electrical connection therebetween, said coating covering the end of said conductor at the base of said flared portion of the contact member.
References titted in the file of this patent UNITED STATES PATENTS 1,039,542 Kennington Sept. 24, 1912 1,198,500 Wilcox Sept. 19, 1916 2,258,343 Walker Oct. 7, 1941 2,626,976 Howerstine Jan. 27, 1953