Dual coil electromagnet using rectilinear cross-section core...

Details Dual coil electromagnet using rectilinear cross-section core... Dual coil electromagnet using rectilinear cross-section core...

2001-12-03

2004-08-10

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

C606S186000

Reexamination Certificate

active

06774754

ABSTRACT:

BACKGROUND OF THE INVENTION
Dual coil electromagnets are used in tattoo machines and are well known in the art. In particular, the dual coil machines operating on a direct current power supply follow the patents of Wagner, U.S. Pat. No. 768,413 and Waters, U.S. Pat. No. 1,724,812. Both of these machines teach dual coils that are excited by a direct current power supply. This electrical excitation produces a magnetic field that attracts a spring-biased, moving armature bar toward the coils. The motion of the armature bar opens a switch in the electrical circuit causing the current and the magnetic field to decay, thereby allowing the bias spring to return the armature bar to its original position. This closes the switch which completes the circuit again and the process repeats itself. This causes a vibration of the armature bar. This motion is coupled to the tattoo needle, causing it to vibrate axially. The needle can then be used to penetrate the skin and deposit ink, as is well known in the art. The end of each coil opposite the moving armature bar is attached to a connecting bar that is usually also a structural element.


REFERENCES:
patent: 4159659 (1979-07-01), Nightingale
patent: 5054339 (1991-10-01), Yacowitz
patent: 6282987 (2001-09-01), Moniz
patent: 6550356 (2003-04-01), Underwood
patent: 2002/0050884 (2002-05-01), Godoy et al.
patent: 2003/0050657 (2003-03-01), Evans

Affiliated with

Also associated with

Rating

Dual coil electromagnet using rectilinear cross-section core... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual coil electromagnet using rectilinear cross-section core..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual coil electromagnet using rectilinear cross-section core... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3277252