US762297A - Third-rail insulator. - Google Patents

Description

PATENTED JUNE 14, 1904.

H. L. FRI-TZE. THIRD RAIL INSULATOR.

APPLIOATION FILED 00T. 27. 1903.

N0 MODEL.

W/TNESSES:

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UNITED STATES Patented June 14, 1904.

PATENT OFFICE.

THIRD-RAIL INSULATOR.

SPECIFICATION forming part of Letters Patent N0. 762,297, dated June 14, 1904.

Application filed October 27, 1903.

'plate cemented into glass, stone, slate, porcelain, or an insulation composition covered with a rubber pad, mica disk, and cover bolted together, all metal enameled. This supports the third rail and acts as a perfect insulator, preventing electrolysis and short-circuiting.

Figure 1 is front view of third-rail insulator attached to top plate and base or bottom plate fastened on wooden railway tie or beam. Fig.

2 is the sectional view showing' wood ties,

showing base-plate cemented in glass or other insulating material with rubber pad, mica disk, and top plate that clamps third rail and holds same in place. Figs. 1 and 2.

A in the several drawings represents the enameled top plates fastened together by bolts to clamp the third rail.

B in the several drawings represents the enameled bottom or base plates that are bolted or lagged to the tie or beams and to which the glass or composition insulation is cemented.

C in the several drawings represents the glass or composition insulation-body.

D in Fig. 2 represents the rubber pad.

Fig. 3 is the top view of Serial No. 178,722. (No model.)

E in Fig. 2 represents the mica disk.

F in Figs. 1, 2, and 3 represents the enameled bolt that clamps the third rail in place.

G in Figs. 1, 2, and 3 represents the tie or beam.

In Fig. 2 the pieces A and B being enameled prevent corrosion of metal in wet or damp Weather, thus preventing short-circuiting or electrolysis.

In Fig. 2, D shows the rubber pad, which forms a cushion and prevents the top plate A from jarring the glass or insulation body C and protects the insulator against all vibration.

In Fig. 2, E shows the mica disk, which protects the rubber pad D from dust and moisture.

I do not limit myself to any special design insulator, and

' Having thus fully described my invention,

whatI claim as new, and desire to secure by Letters Patent, is-

1. The combination of the enameled top plate A and enameled base-plate B, With body C, of glass, stone, slate, or insulating composition, rubber pad, D, mica disk E, enameled bolt F and Ytie-beam Gr.

2. The combination of mica disk E with plate A, basey B, insulator C, rubber pad D, bolt F, tie or beam Cr, as and for the purpose specified.

In testimony whereof I, HENRY L. FRITZE, have signed my name to this specification, in the presence of two subscribing witnesses, this 21st day of October, 1903.

HENRY L. FRITKZE.

Witnesses:

F. D. HiRsoHY, E. R. HUDDERS.

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