US2185950A - Electric contact device - Google Patents

Description

Jan. 2, 1940. H. c. ROSE 2,185,950

- ELECTRIC CONTACT DEVICE Filed Feb. 5, 1938 H. mm

Patented Jan. 2, 1940 ELECTRIC CONTACT DEVICE Harm C. Rose, Franklin, Nebr. Application February 3, 1938, Serial No. 188,580 3 1 Claim.

This invention relates to a charging device particularly useful for energizing the wires or parts of metallic fences so that livestock endeavoring to pass through the same will receive a stinging shock and thus be thwarted in the effort.

It is particularly aimed to provide an exceedingly simple and relatively inexpensive structure essentially comprising a transformer, relay, and

a means to delay the engagement of the contacts in order to minimize the amount of electricity used.

= The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawing illustrating an operative embodiment.

In said drawing:

Figure 1 is a view showing the invention in electrical diagram;

Figure 2 is a side elevation of the invention;

and

Figure 3 is a detail horizontal section taken on the line 3-3 of Figure 2.

Referring specifically to the drawing where- 25 in like reference characters designate like or similar parts, a unit or casing is provided at I which encloses a transformer H. This transformer has a primary winding I2, a secondary winding I3, and a core I4.

30 At one end of the casing, a pair of fingers or bars I5 and I6 are disposed. These fingers I5 and I6 are of conducting metal and somewhat resilient. Finger I5 is connected to the casing II] by a metallic connection at IT and the finger 35 I6 is connected to the casing by a metallic connection at I8. A bracket I9 of U-shape, is con?- nected at its terminals to the casing Ill and surrounds the fingers I5 and I6 and screw threaded to the bracket is a tensioning screw 20 for said 40 fingers.

The free end of the finger I6 is laterally offset as at 2I. Finger I5 has an offset branch 22 of I the same material as the finger I8 which is disposed substantially parallel to the offset por- 45 tion 2|. Said parts H and 22 have contacts 23 and 24 thereon. The tension of the fingers I6 and I5 is to normally urge the contacts 23 and 24 into engagement so as to establish an electric circuit from a source of electric energy 50 25, for instance a storage battery, primary battery, generator or the like having conductors 26 and 21. the former connected to one terminal of the primary coil I2 and the latter connected to the connection H. The other terminal of the 5 primary winding I2 is connected at 23 to the connection l8.

The secondary winding or coil I3 is grounded at one terminal as at 29 and its other terminal 30 is connected in any suitable manner to the fence wire or the equivalent as suggested at 3L, Normally the contacts 23 and 24, under the urgency of the finger I5, seek engagement. Such engagement closes the electrical circuit which energizes the core I4 and the latter thereupon attracts finger I5 accordingly disengaging the contacts 23 and 24. When the circuit is broken through such disengagement, the core will release the finger I5 which will again move into position closing the contacts 23 and 24. Thus the circuit is alternately closed and opened and current is supplied to the fence wire 3I or the equivalent in order to transmit a shock to cattle contacting the same, to thwart any efforts to pass through the fence.

In order to delay the closing of the contacts 23 and 24, following attraction of the finger I5 by the core I4, a somewhat lighter or more resilient finger or spring 32, than the finger or spring I5, is connected to the latter at 33, and provided with a weight 34 at its upper end. The spring 32 preferably is disposed on the opposite side of the finger I5 to the branch 22, and curves upwardly and away from the finger l5. This spring 32 and weight 34 will sway back farther on the back stroke of the finger I5, that is when the latter is attracted by the core I4, than on the other stroke, thereby making a very quick contact of elements 23 and 24 on the forward movement.

Various changes may be resorted to provided they fall within the spirit and scope of the invention. I 35 I claim as my invention: Switch means having a relatively long upstanding contact member adapted to be vibrated, a branch on said contact member extending at an angle away from the contact member midway of its ends, means to anchor the lower end of said contact member, a second Contact, both of said contacts being conductors of electricity, said second contact extending in the same general direction as the first contact and having an outwardly offset portion coacting with the contact member, means to anchor the lower end of the second contact, guide means for the contacts surrounding them intermediate their anchored ends and said offset portion, means on 5 the guide means. operable against the second mentioned contact to adjust the postion thereof, and a weighted spring arm extending from the first mentioned contact adjacent the upper end thereof.

HARM C. ROSE.

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