Battery charger assembly

• US 4,447,785 A
• Filed: 03/30/1982
• Issued: 05/08/1984
• Est. Priority Date: 03/30/1982
• Status: Expired due to Term

• Current Assignee: Bruce R. Wright
• Original Assignee: Bruce R. Wright
• Inventors: Wright, Bruce R.
• Primary Examiner(s): Shoop, William M.
• Assistant Examiner(s): Ault, Anita M.
• Application Number:
  US06/363,452
• Time in Patent Office: 770 Days
• Field of Search: 320/2, 320/3, 320/4, 320/5, 320/6, 320/8, 320/25, 320/48, 320/53, 320/57, 320/59, 340/636
• US Class Current: 320/105
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/0034 using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y10S 320/20 Polarity

Abstract

A battery charger assembly for charging a battery includes a battery charger power supply having a positive output and a negative output for providing a rectified DC voltage output. A negative cable is connected to the negative output and a positive cable is connected to the positive output with clamps being connected to each of the cables. A polarity indicator including a test contact, a first indicator for indicating a first polarity connection and a second indicator for indicating a second opposite polarity connection is electrically connected to one of the cables. The first and second indicators are connected for indicating if the battery charger voltage output is greater than the voltage of the battery. An electrical connection is provided between the positive and negative cables for actuating the indicators.

Claims

1. A battery charger assembly for charging a battery with two terminals comprising:

(a) a battery charger power supply having a positive output and negative output for providing a rectified DC voltage output and including a transformer and at least one rectifier diode,

(b) a continuous negative cable connected to the negative output,

(c) a continuous positive cable connection to the positive output,

(d) a pair of clamps, one clamp being connected to each of the cables, and

(e) polarity indicating means connected to one of the clamps, the polarity indicating means including;

3. A battery charger assembly as defined in claim 1, in which:

(f) the first and second indicators are connected for indicating if the battery charger voltage output is greater than the voltage of the battery.

4. A battery charger assembly as defined in claim 1, in which:

(f) a resistor connected across the power supply output provides an electrical connection between the positive and negative cables.

5. A battery charger assembly as defined in claim 1, in which:

(f) a resistor connected in parallel with the rectifier diode for providing an electrical connection between the positive and negative cables.

6. A battery charger assembly as defined in claim 1, in which:

(f) the rectifier diode is a selenium rectifier, the selenium rectifier providing an electrical connection between the positive and negative cables.

7. A battery charger assembly as defined in claim 1, in which:

(f) the polarity indicating means is carried by and electrically connected to one of the clamps,

(g) said one clamp includes opposed side jaw contacts, the cable associated with said one clamp being electrically connected to one of the jaw contacts,

(h) the polarity indicating means is electrically connected to the other jaw contact, and

(i) the jaw contacts electrically engage when the clamp is closed to electrically connect the polarity indicating means to the said cable.

8. A battery charger assembly as defined in claim 1, in which:

(f) the first indicator is a green LED, and

(g) the second indicator is a red LED.

9. A battery charger assembly as defined in claim 5, in which:

(g) the first indicator is a green LED, and

(h) the second indicator is a red LED.

2. a test contact for contacting a terminal of the battery,a first indicator serially connected between the test contact and said one of said clamps for indicating a first polarity connection, anda second indicator serially connected between the test contact and said one of said clamps for indicating a second opposite polarity condition, whereby when said test contact is brought into contact with said terminal of the battery and the other of said clamps is connected to the other terminal of the battery, an electrical circuit between the battery terminals will be completed through the battery charger assembly, said electrical circuit including said test contact, said first or second indicator, said one of said clamps, one of said cables, the other of said cables, and said other clamp.