US2127898A

US2127898A - Low voltage fence charger

Info

Publication number: US2127898A
Application number: US62708A
Authority: US
Inventors: Homer E Webster
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-02-06
Filing date: 1936-02-06
Publication date: 1938-08-23
Anticipated expiration: 1955-08-23

Description

H. E. WEBSTER 2,127,898

LOW VOLTAGE FENCE CHARGER Filed Feb. 6, 1936 2 Sheets-Sheet l awe/whom Ham r E. @661 a 2 I i v Wicca/14:41:;

Aug. 23, 1938. H. E. WEBSTER LOW VOLTAGE FENCE CHARGER Filed Feb. 6, 1936 2 Sheets-Sheet 2 fer.

W Homer L. M65

Patented Aug. 23, 1938 I UNITEDVSTATES PATENT OFFICE LOW VOLTAGE FENCE CHARGER Homer E. Webster, Nelllsvllle, Wis. Application February a, 1936, Serial No. 62,708

2 Claims.

This invention relates to a low voltage fence charger, and it aims to provide a novel construction adapted tointermittently charge a cattle fence with electricity say from 100 to 150 volts for a period of about 1/1000 of a second once in every revolution of a rotating circuit breaker, or about once in every second.

A prime object is to secure the maximum effect of keeping cattle from fences by an electric shock with the minimum amount of current. It has been found that one instant of electric shock is about as efiective as a periodic series of smaller ones, or even a continuous charge, and of course is far safer.

While the machine uses an electrically operated rotor in the present embodiment, any approved type of apparatus to produce the above effect may be used.

It is further aimed to provide a novel means whereby a secondary voltage and current may be regulated at will, as well as the speed of the rotor.

The more specific objects and advantages will in part be pointed out and otherwise become apparent from a consideration of the description following, taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:-

Figure 1 is a view of the apparatus in front elevation, with a closure or front of the casing in open position;

Figure 2 is a vertical sectional view taken substantially on the line 2-2 of Figure 1;

Figure 3 is a fragmentary vertical sectional view taken on the plane of line 3-3 of Figure Figure 4 is a diametric section taken on the line 4-4 of Figure 1;

Figure 5 is a cross section taken on the line 5-5 of Figure l; and

Figure 6 is a view of the part in electrical diagram.

Referring specifically to the drawings, wherein like reference characters designate like or similar parts, all of the elements are carried by and for-the most part mounted within a suitable casing in having a door or closure il hinged thereto as at H. The specific connection of the various elements orparts will best be seen from the diagram of Figure 6. 50 Within the casing ill a suitable block H, of insulation, in combination with straps l4 and bolts I5, mount main coil laminations 16, such laminations, for instance, being of iron. An intermediate bracket or strap i1 bolted as at II to the 'casing, has a vertical post i! on which a rotor 20 is journaled, ball bearing means 2| preferably being interposed between the rotor and post and the rotor being removably secured in place by means of a nut 22 threaded to the post. The rotor 20 preferably consists of lamlnations of cast 5 iron, and it will be noted that the ends of the laminations 10 extend upwardly at opposite terminals and are disposed adjacent the periphery of the rotor.

Electric current is adapted to be supplied from 10 any suitable source, as, for instance, a 6-volt storage battery as shown at 23, one terminal of which is connected to ground as at 24, and the other terminal of which is connected to a conductor 25 with a primary induction coil 28, with which a 15 secondary induction coil 21 coacts.

Coils

26 and 21 are wound about the laminations It. Means hereinafter described provides a normally open circuit through coil 26 and a constantly closed circuit through coil 21. A fuse 28 may be pro- 20 vided in the conductor 25.

A conductor 29 leads from the secondary windv ing 21 and is grounded to the machine at 30, and the machine is grounded to the earth. A conductor 34 leads from the primary winding 26 to 25 a resilient contact 33. Coacting with the contact 33 and normally disengaged therefrom is a resilient contact 35. A conductor 32, connected to both contacts is grounded to the machine at 36, and includes a condenser 32. 0

Leading from the secondary winding 21 is a conductor 38 to a transformer 39 from the lower voltage side of which a conductor 40 leads to the fence, as later described, having a resistor 4| therein and a lamp 42 therein, grounded as at 5 43. From the higher voltage side of the transformer 39, which is grounded as at 44, a conductor 45 leads through a lamp 46, grounded as at 41. Both of said

lamps

42 and 46 are of the neon glow type, the lamp 42 being a secondary volt- 40 age indicator, and the lamp 46 being a secondary current indicator.

The metallic wire of a fence, such as a cattle fence, to be charged, as suggested at 48, is connected directly or by an intermediate conductor 45 49 to a binding post 50 carried by the casing in.

The conductor 45 may essentially comprise an L-shaped metallic frame 5| to which a bolt 52 connects the

aforesaid contacts

33 and 35, properly insulated as at 53 and normally out of con- 50 tact. Outward movement of one of said contacts is limited by a block of insulation 54 carried by the frame ii when the other contact tends to spring away from such contact that is adjustable to vary the distance or space between the contact 55 adjacent end of the frame the cattle fence 48 [about once in every to which end it Jls engaged by a disc ll slidably and adjustably positioned on a bolt l extending from block I and held in adjusted position by a nut 51 on the bolt.

One oi said contacts carries a projection ll thereon which is adapted to be engaged by a metallic shoe ll, once during each revolution of the rotor 20. Such contacts 59 may be tilted or moved to any desired angle with respect to the rotor, as it is fastened to place removably and adjustabiy by the bolt 60. By the tilting or angularity of the shoe 58, the amount of secondary voltage current may be regulated.

' The frame ll may be shifted or adjusted to the shifting or adjustment of a bolt 6i, which passes through a hole in the frame II and an elongated slot 02 in the wall of the casing l0, and which bolt engages, by screw threads, screw threads of discs or nuts 03, on opposite sides of such wall, to rigidly hold the screw in diiferent adjusted positions. An expansive coil spring 64 surrounds the bolt between the innermost disc 63 and the frame I I, a nut 0' being soldered to the frame II, and hence through the turning i may be moved inwardly or outwardly to vary the distance between the contacts I3 and 35, thereby facilitating their justment.

From a practical standpoint, the rotor is .adapted to rotate at about-i0 to revolutions per minute, for example. It is adapted to charge with about to volts for a period of about 1/1000 of a second. which charge occurs once in each revolution, which is second. From the closing of the circuit through the lamp 4!, the glowing thereof will indicate the secondary voltage, that is, the voltage applied on the fence, while, when the circuit is closed through the lamp 46, which is the secondary current indicator lamp, the

. glow thereof will indicate how much current is leaving the machine for the fence.

The primary or circuit through coil 28 is open except when shoe 59 holds resilient contacts I! and I! together, thus allowing the current in such primary circuit to build up a magnetic field in the of the screw II, the

core ll. But when the resilient contacts ll and II are released, the sudden breaking of the pricondenser 32, insecondary coil 21,

latter bolt engaging tact, and a nut threaded on the latter bolt operable against the disc to adjust the position thereof. I

2. A device of the class described having a casing, a rotor therein, circuit closing contacts,

means to close said contacts through the oper-- ation of the rotor, a frame in said casing anchored at one end and mounting said contacts, a bolt extending loosely through the casing having screw-threaded connection with the frame operable to adjust the position of the frame to vary the spacing of the contacts, an expansive coil spring on the bolt engaging the casing and the frame, a block overlapping one of the contacts, a bolt on the frame on which the block is mounted extending beyond the block, a disc slidable on the latter bolt engaging a free end of the other contact, a nut threaded on the later bolt operable against the disc to adjust the position thereof, a shoe on said rotor, means to secure the shoe at different angles to the rotor, and a projection on one of the contacts engageable by the shoe.

HOMER E, WEBSTER.