US1036864A - Switching device. - Google Patents

Description

J. H. LEHMAN. SWITCHING DEVICE.

APPLICATION FILED MAR. 10, 1906.

1,036,864, Patented Aug. 27, 1912.

Qwilmcogco M w wuemfof $8M CH'i ocnu JOSEPH H. LEHMAN, OF NEW YORK, N. Y.

SWITCHING DEVICE.

Specification of Letters Patent.

Patented Aug. 27, 1912.

Application filed March 10, 1906. Serial No. 305,219.

York city, in the county of ew York and State of New York, have invented certain new and useful Improvements in Switching Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

.My invention relates to improvements in electrical switching devices, and more specifically, has reference particularly to an apparatus adapted to be used in connection with an explosion engine for the purpose of timing the spark in the explosion chamber thereof.

Referring to the accompanying drawings, Figure 1 is a plan view of my switching device. Fig. 2 a section on the line 22 through the center of Fig. 1. Fig. 3 is a view of the brush device in perspective, and Fig. 4 is a sectional view of the tongue and its accompanying parts forming part of the brush device.

5 isvthe bearing of the switching device, and 6 the gasket of the engine adapted to receive and hold the same.

7 is the shaft of the switching device provided with a washer 7, and with the brush device retained thereupon by the washer 8, keyed thereto, and by the nut 9. This brush device comprises an outer casing 10 provided with an interior tubular passage 11 through.

which the end of the shaft 7 protrudes.

12 is a tongue projected from the mouth of the casing 10 by the spring 13, and provided with porous material, preferably in the form of a wick, such as felt 14. This porous material is preferably riveted to the tongue 12 of the brush member, and is saturated with suitable lubricating material, such as heavy grease, so that as the tongue 12 rotates past the contact pieces 16 it is followed by this wick-like member of felt 14. through which the grease is forced by the centrifugal force of the rotation, thereby snufiing out the sparks or flashes created in the breaking of the circuit.

15 is a circular insulating member provided with contact pieces 16, said contact pieces terminating in binding posts on the periphery of said circular insulating member, said binding posts comprising screws 17 fianged at their outer ends, and each screw provided with a hole 18 through which the wire of an electric circuit may be passed. The spiral spring 19 is adapted to force the cap 20 away from the base nut 21, thereby binding the wire 22 of the circuit firmly in place. Y

23 is the cover of the switching device provided on its inner face with a contact member such as a spring 24 adapted to electrically connect said cover with the end of the shaft 7, and 25 and 26 are binding screws adapted to bind said cover in place, also serving as a ground connection in the electric circuit of the switch.

29 is a disk of insulating material adapted to be inserted between the circular insulating member 15 and the bearing 5. There is preferably a small space 27 provided between the circular insulating material and the insulating disk 29, said space communicating with the pamage 28 so that any sediment may be readily removed from the bottom of the cup-like chamber formed in the construction of the switching device.

. In operation, the parts are assembled as shown, and the brush device is adjusted upon the shaft 7 to the required angle or position to get the-spark at the right moment in the explosion chamber. It will readily be observed that this adjustment is obtained simply by loosening up the nut 9 on the end of the shaft 7, shifting the brush device to the proper angle and then tightening said nut. The fact that the end of the shaft is cut away on one side and a washer cut to key therewith prevents a slipping of the adjustment ofthe brush in tightening the nut 9 after the brush has once been set.

Various modifications may be made without departing from the spirit .of my inventlon.

'What I claim as new and desire to secure by Letters Patent, is: t

1. In an electric switching device, a revoluble shaft, 9. contacting brush upon said shaft, a circular insulating member adjacent to said brush provided with contact pieces, said contact pieces electrically connected to one side of an electric circuit, said brush electrically connected to the other side of said electric circuit through said shaft, said brush provided with a chamber containing porous material, and said porous material saturated with lubricating material.

2. In an electric switching device, a rotating shaft, a contacting brush adapted to be carried by said shaft, a bearing for said ber and porous material in said chambier to re shaft, a circular insulating member adjacent absorb said lubricating material.

to said brush, contact pieces attached to In testimony whereof I afiix my signature said insulating member, said contafct plelzces 1n presence of two witnesses. I electrically connected to one side 0 an e ecv tric circuit, said brush electrically connected JOSEPH LEHMA to the other side of said electric circuit and Witnesses:

said brush provided with a lubricating MARGARET M. DUNLEAVY,

- chamber, lubricating material in said cham- THOMAS A. HILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. G.

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