Internal vibrator supplied with current from a transformer

Details Internal vibrator supplied with current from a transformer Internal vibrator supplied with current from a transformer

1993-12-30

2000-07-04

Enad, Elvin

Electrical generator or motor structure

Dynamoelectric

Rotary

310 47, 310 48, 310 50, 310 68D, H02K 1100

Patent

active

060843276

ABSTRACT:
An internal vibrator for compacting concrete and having a vibrator housing in which is disposed an eccentric mass and an electric motor for driving the eccentric mass. The electric motor is supplied via a power supply cord with electric current having a frequency that is greater than line frequency. The vibrator comprises a switch for controlling the electric motor, and also includes a transformer for supplying to the electric motor the electric current having the frequency that is greater than line frequency. The switch and the transformer are combined in a common housing to form a miniaturized built-in unit on the power supply cord.

REFERENCES:
patent: 2116708 (1938-05-01), Niekamp
patent: 2478701 (1949-08-01), Maginniss
patent: 2924730 (1960-02-01), Spitler
patent: 2940326 (1960-06-01), Meyer
patent: 2945970 (1960-07-01), Nordegren
patent: 3202402 (1965-08-01), Giertz-Hedstrom
patent: 3529190 (1970-09-01), Fontaine
patent: 3601368 (1971-08-01), Uebel
patent: 3782693 (1974-01-01), Strohbeck
patent: 3784168 (1974-01-01), Schneider et al.

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