US1694270A - Safety switch - Google Patents

Description

J. F. LAUPER SAFETY SWITCH Dec. 4, 1928. 1,694,270

Filed Oct. 24, 1927 li atenten l 42, i928;

beta2@ JOEE@ F. LAUPER, GF HOLLANDALE, EVSCGNSIINL SAFETY SWITCH.

Application filed ctober'24, 19527. Serial No 228,348.

This invention relates to a safety switch for telephones, radios and the like, the general object the invention being to provide means for disconnecting the inside wires from the outside wires by a simple turning mov nnent oiL a switch part so that there is no danger of lightning entering the house over the wires.

This invention also consists in certain other features or" construction 'and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings7 and specifically pointed out in the appended claim.

ln describing my invention in detail, rer"- erei'ice will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several vi ews, and in which:

Figure 1 is a plan view of the improved switch. y

Figure 2 is a section on line 2-2 of Fige Figure is a plan view of the stationary member of the switch.

`Figure et is a bottom plan view of the movable member thereof.

Figure is a side view of the movable member.

Figure is a sectional view through the ationary member.

Figures 7 and 8 are diagrammatic views showing the switch in its two positions.

ln these views7 1 indicates the stationary member of the switch which is formed with a central socket 2 in its bottom and with four bottom rec es 3 which extend inwardly from the sides. This member 1 has a flat top which is pr vided with an annular groove 4lwhieli isarranged over the inner ends of the recesses 3 and the bottom of the groove is provided with four flat parts 5 which are separated by conc-ave'd portions 6 formed in the bottom ot' the groove. Terminal ser-ews i' pass through the Hat portions into the recesses 3 and the conductors 8, leading to the radio, telephone or other electrical erolianee fL stened to two of these 1 e mts 9 which are arranged in the recesses and the ground wire and the wire 11 leading 'to the aerial or to a main line are connected with the other two screws by nuts 9, the conductors passing through the outer portions of the recesses.

The movable member 12 of the switch has a depending stem 13 screwed or kotherwise fastened to the member 12 and this stem passes through a hole formed in the top of the stationary member and extends into the socket 2 where it receives a spring 14: which is held on the stem by a locking disk 15 which engages a groove 16 formed in th lower end of the stem. Thus the movable member is yieldingly held on the stationary member and may be rotated thereon. The member 12 is provided with a flange 17 which extends into the groove t of the stationary member and the loweredge of said Flange is formed with the four convex parts 18 for engaging the concaved parts 6 and the four flat parts 19 for engaging the fiat parts 5 of the member 1. Both portions of the switch are formed of non-conducting material and metal plates 20 are fastened to two of the portions 18 and extend over the adjacent flat parts 19. The plates are arranged diametrically opposite each other.

From the foregoing it will be seen that when the member 12 is in one position, one of the metal plates will bridge the terminal screws of the conductors 8 and 11 and the other the terminal screws of the second conductor 8 and the conductor 10, as shown in Figures 7, so that the current will pass to the electrical instrument in the house, but when the member 12 has been given a quarter turn, one plate will bridge the terminal screws of the two conductors 8 and the other plate will bridge the terminal sorews of the conductors 10 and 11 so that the circuit tothe instrument will be broken and the main wire 11 will be electrically connected to the ground wire 10, as shown inFigure 8. Thus there is no danger of lightning entering the house. By making the bottom of the groove and the bottom of the flange 7 as shown7 and by providing the spring 11i, a good electrical connection is provided between the parts as the rictional engagement between the plates 20 and the terminal screws will keep these parts in firm engagement and the turning` movement will keep the parts clean.

1t is thought from the foregoing description that the advantages and .novel Jfeatures of my invention rWill be readily apparent.

I desire it to be understood that I may make Changes 1n the construction and 1n the combination and arrangement of the several parts, provided that such changes fall Within the scope of the appended claim.

What I claim is:-

A switch or' the class described oomprising a stationary part and a movable part, means for yieldingly Connecting the tWo parts together, the stationary part having an annular'groove therein formed With four flat portions in its bottom and four Concaved portions in its bottom which are .placed JOHN F. LAUPER.

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