Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – For magnetizing or demagnetizing
Reexamination Certificate
2000-05-19
2001-10-30
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
For magnetizing or demagnetizing
C081S451000
Reexamination Certificate
active
06310532
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to devices or apparatus's which are specifically used for magnetizing or demagnetizing ferromagnetic objects, such as tools. However, the present invention more particularly pertains to such a device that may be used for multiple purposes and can accept different sized objects. Also the device may include a tubular shaped container for containment of small specialty items, such as those typically used by jewelers, or the like.
BACKGROUND OF THE INVENTION
Within the known prior art, many attempts have been made to provide a device which may be used for magnetizing or demagnetizing ferrous members, such as screwdrivers, or the like. However, each have inherent disadvantages which the present invention addresses and overcomes in a manner heretofore not taught. For example, U.S. Pat. No. 5,055,813 entitled “MAGNETIZATION/DEMAGNETIZATION DEVICE”, teaches a portable device which may be used for tools, etc. But this device is very limited, as it provides a single opening which will only accept a standard, or smaller sized screwdriver, and therefore is not functional for other types of tools.
Other examples include U.S. Pat. No. 3,467,926, entitled “COMBINED MAGNETIZER AND DEMAGNETIZER” and U.S. Pat. No. 3,662,303 entitled “INSTANT MAGNETIZER AND DEMAGNETIZER”, which again are only functional for a standard, or smaller sized screwdrivers.
Each of the above devices are functional for use with screwdrivers and are advantageous because they are portable and compact. Unfortunately they are not electric, and are therefore very weak, thus a user must repeatedly engage the magnetizing or demagnetizing process every few days. This is both time consuming and most irritating for the user and further interferes with productivity, which can be costly.
Other types of demagnetizing devices include U.S. Pat. No. 4,158,873 entitled “DEMAGNETIZING METHODS AND APPARATUS” and U.S. Pat. No. 4,829,397 entitled “APPARATUS FOR DEMAGNETIZING PARTS”. These two references are strictly used for demagnetizing, they are much too complicated and include parts which the present invention eliminates. Also these devices will not allow a user to insert an object which is to be demagnetized into and throughout the receptacle of the device.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a multipurpose magnetizer/demagnetizer that overcomes the known disadvantages associated within the prior art.
Another object of the present invention is to provide a multipurpose magnetizer/demagnetizer which is very powerful, durable, of simple construction, and is economical to manufacture and affordably priced for the consumer.
Still another object of the present invention is to provide a multipurpose magnetizer/demagnetizer which is not limited to use with a specific tool, such as a screwdriver or the like, and can accept elongated objects irrespective to a any specific length. This is a very important object as some specialty tools, such as screwdrivers that include removably interchangeable tips, also have a large bulging permanent magnet built inside of the shaft which will not fit into the receptacles typically provided within the prior art.
Also another object of the present invention is to provide a multipurpose magnetizer/demagnetizer which is normally referred to as a bench-top and is powered by typical voltage, such as 110-120 volts AC.
Yet another object of the present invention is to provide a multipurpose magnetizer/demagnetizer which includes various safety features.
Still another object of the present invention is to provide a multipurpose magnetizer/demagnetizer that includes at least one on/off switch which totally disconnects the device 100% from the power source when not in use, at least one magnetize/demagnetize switch, and at least one indicator light.
A further object of the present invention is to provide a multipurpose magnetizer/demagnetizer that allows the user to either fully or only partially magnetize or demagnetize an object of choice, according to the user's individual needs.
Yet another object of the present invention is to provide a multipurpose magnetizer/demagnetizer having an elongated circular receptacle that will accept an accessory item such as a non-conducting tubular shaped container. With the container being used for containment of small parts, such as watch parts, which require demagnetizing periodically, or the like.
Also an object of the present invention is to provide a multipurpose magnetizer/demagnetizer which may include an accessory item such as a metal strip, or a separate tubular member which is used to indicate magnetism strength of the tool, and thus notifies the user when the tool needs to be re-magnetized.
Still another object of the present invention is to provide a multipurpose magnetizer/demagnetizer that is very simple to use and is of durable construction.
A further object of the present invention is to provide a multipurpose magnetizer/demagnetizer which when a tool has been magnetized, the tool will remain in the treated condition a longer period of time than when subjected to treatment by the known prior art. For example, a tool when subjected to a typical non-electric magnetizer/demagnetizer will remain in the magnetized condition for approximately 3 days. While a tool when subjected to treatment by the present invention will remain in the magnetized condition for approximately 3 months, as long as the tool is not subjected to extraordinary impacts or heat, and this is very advantageous.
REFERENCES:
patent: 1849085 (1932-03-01), Haskins
patent: 3772686 (1973-11-01), Chadron
patent: 3922687 (1975-11-01), Trimble et al.
patent: 4716796 (1988-01-01), Corona et al.
patent: 5055813 (1991-10-01), Johnson
Alderson Neil R.
Henry Gregory L.
Santa Cruz Cathy D.
LandOfFree
Multipurpose magnetizer/demagnetizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multipurpose magnetizer/demagnetizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multipurpose magnetizer/demagnetizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2610544