US1738009A - Insulator - Google Patents

Description

Dec. 3,1529.

P. J. KAYAr-r 11,733,009

INsULAToR lFiLed Jan. 10, 1928 dll Patented Dea-3, 1929 l UNITED {SITA-Tes' PATENT nimm J. nun, extremas, NEW Yonx, 'assmnoa 'ro maaien' Neon maar couronnes, or mawronx, N. Y., 'A conroamlon or nmwm- INsULAron. i

.y v Appunti@ ma :sanary 1o, 1928. semi no. 245,651'. Y

My invention relates to electrode insulators pagticularly adapted for use with luminescent tu es.

In. the copendin a lcation of Otto B.

Ngo. I221l)1,956, filed August th, 1.927, orinsulators, a preferrediorm of such insulator is disclosed.

My present invention embodies a modification and improvement of this form of insulator wherein are found certain advantages and benefits beyond what said copending application shows and amongv its advantages and benets may be mentioned great ease of inspection and repairfagreater degree of pro-y tection against vibration' or jarring of the electrode chamber and a better method of securing the lead-in cables orl wires and of maintaining them in self adjusting relation to said electrode. Other and further advantages will be made clear in the following specilication of which the drawing forms a 'part.

lln the drawings :4f l

Fig. 1 is an elevationr'andcrosssection ol the insulator and electrode structure.

preferred formof this invention. l 3

Fig. 3 is a top plan view of Fig. 2. p

Fig. 4 is a perspective of the removable bushing.

In Fig. 1, the shell ofthe insulator is shown at 1, and the cap of the'insulator at 2. This cap may be attached to the shell by screw threads as indicated. The removable bushing is at 3, through which passes the lead-in wire or cable, 4. Aixed to the inner face of the bushing, 3, is a connection, 5, which is held in a recess oi the bushing by a screw, 6,- or other adequate retaining means. This screw, 6, also serves to iorm a contact between the wire, 4, and the connectiom. Attached to the inner Fig. 2 is :1m/elevation of an insulator of a,

Y end oi the connectiom, by means of a screw,

7, or the like, is a resilient member, 8,` which I prefer to show as a helical spring. The electrede chamber is shown at 9, and on the base of this chamber isa conducting element, 10, which forms a seatfor the resilient member,

` 8, and which also passes current from the resilient member to the electrode within the chambers, 9,-the electrode and its connec tions within the chamber not being shown.

The shell of the insulator, 1, is attached to the apparatus by suitable means through holes,

11, in theiiange ofthe shell; ,thisapparatus y carrying the luminescent'tube of which 9, is

the electrode chamber. This apparatus is not l5 n shown but may be of the type indicated in said copendmg appllcation heretofore mentioned oil; may be of any other form recognized in ,teart.

In Figs. 2 and 3, will seen that the shell 00 of the insulator, which may bev of bakelite, hard rubber or other similar insulating material, has a cut, 12, which extends downwardly from the upper edge of the insulator. .This cut, 12, is adapted to receive the removable bushing, 3', shown in Figure 4. This removable bushing maybercompose'd of material similar to-that of the' shell of the insulator and has an extension, 13, projecting Vfrom the frontface ofthe bushing while to the rear face is attachedl the connection, 5, with the resilient member, 8,'as heretofore described. 0n the edges of this-bushing are two grooves,

v14 and 15, which'have a width approximately' equal to the thickness of the shell', 1, of the in- 75 Y sulator, and this bushing is 'applied bysliding it downwardly into'the cut, 12,'and itis'held in place by the cap, 2, after this cap `is screwed on the shell.

From the foregoing it can be seen that I '89 haveV provided a very effective 'structure for the reason that by removing the cap, 2, the entire assembly of thelead-in Wire or cable, the connector and the resilient member ycan be removed without iniany Way disturbing the electrode chamber or electrode.

In addition, the resilient member, 8,pro l vides a very eiective and automatic vadjustment between the electrode contacts and the supply terminals and'automatically compen- 90 sates for variations in the distance to which the electrode chamber may enter the insulator.

While I show a preferred form of my invention, it will `be evident that other forms of resilient members may be used in place ofthe helical spring, 8, or that connectors, other than that shown at 5, may be equally well used. Therefore, being aware that many'A changes and variations in my invention may be made without departing from the,4 spirit thereof, I desire to include all such changes and variations within the scopev of my claims.

I claim v 'y 1. In a device -of the kind described, the combination with a shell and a cap, of a removable bushing slidably mounted on the wall of said shell and held against movement by said cap. i I

2. In a device of the kind described, a slidably removable bushing having grooved edges, said bushing having` an opening` adapted to receive a wire or cable and means affixed to a face of the bushing and arranged to engage the wire or cable, said means carrying a resilient member at one extremity.

3. In a device of thekind described, an insulator having an electrode therein, a removable bushing slidably mounted on the shell of the insulator and retained bv the insulator cap, a connector aiixed to the inner face of the bushing and adapted to engage a wire entering through the bushing, a resilient ymember fixed to said connector and coacting between the connector and said,elec trode.

4. Ina device of the kinddescribed, an electrode, a shell member, a cap member and a bushing carrying a connection with an eX- ternal source of current, said bushing being` slidably mounted on the wall of said shell and having means adapted and arranged resiliently to contact with the electrode terminal and to transmit current thereto from said external source.

5. In a device of the kind described, an electrode within` an insulator, a slidably mounted bushing carrying a connection with an external source of current and mounted on the wall of said insulator and means acting between said electrode and said bushing resiliently to contact with said electrode terminal and to transmit current thereto from a source of current.

In witness whereof, I have hereunto sub- I scribed my name on this the 5th day of December, 1927.

PIIILLIP J. KAYATT.

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