US3637986A — Electrical unit having a magnetic switch connecti…

Claim 1

Independent Claim 229 words

An electrical unit comprising: a. a charging appliance adapted to be connected to an electrical power source, said charging appliance having: i. a charging casing for said charging appliance, ii. a first set of terminals on the outer surface of said charging casing, iii. a first electrical circuit element in said charging appliance for connecting said first set of terminals to said power source, and, iv. a magnetic switch in said first electrical circuit element having a first magnetic arrangement thereon for breaking or completing said first electrical circuit element, and b. a moveable power consumer appliance having: i. a consumer casing for said power consumer appliance, ii. a second set of terminals on the outer surface of said consumer casing adapted to engage with said first set of terminals on said charging casing, iii. a second electrical circuit element in said consumer appliance connecting with said second set of terminals, and iv. a second magnetic arrangement in said consumer appliance for acting magnetically with said first magnetic arrangement whereby when said second set of terminals are brought close to said first set of terminals, the magnetic forces between said first and second magnetic arrangements will cause said magnetic switch to close to complete said first circuit element and when sand first and second sets of terminals are brought into contact with each other, to complete and electrical circuit.

Claim 2

Dependent Claim 229 words

An electrical unit comprising: a. a charging appliance adapted to be connected to an electrical power source, said charging appliance having: i. a charging casing for said charging appliance, ii. a first set of terminals on the outer surface of said charging casing, iii. a first electrical circuit element in said charging appliance for connecting said first set of terminals to said power source, and, iv. a magnetic switch in said first electrical circuit element having a first magnetic arrangement thereon for breaking or completing said first electrical circuit element, and b. a moveable power consumer appliance having: i. a consumer casing for said power consumer appliance, ii. a second set of terminals on the outer surface of said consumer casing adapted to engage with said first set of terminals on said charging casing, iii. a second electrical circuit element in said consumer appliance connecting with said second set of terminals, and iv. a second magnetic arrangement in said consumer appliance for acting magnetically with said first magnetic arrangement whereby when said second set of terminals are brought close to said first set of terminals, the magnetic forces between said first and second magnetic arrangements will cause said magnetic switch to close to complete said first circuit element and when sand first and second sets of terminals are brought into contact with each other, to complete and electrical circuit.

Claim 3

Dependent Claim 107 words

An electrical unit according to claim 1 wherein the second magnetic arrangement is a permanent magnet arrangement with fixed north and south poles and wherein the first magnetic arrangement is a permanent magnet arrangement with movable magnetic north and south poles attached to mechanical switch elements of said magnetic switch with the relative disposition of the poles of the two magnetic arrangements arranged such that when the first and second set of terminals are brought close together, the poles on the switch elements are subjected to magnetic forces by the poles in the first magnetic arrangement whereby the switch elements are moved to close said magnetic switch.

Claim 4

Dependent Claim 88 words

An electrical unit according to claim 2 whereby the switch elements comprise two levers each pivotally supported at one end and having a permanent magnet on the other end, switch contacts adapted to be closed when said levers are splayed, and spring means for urging said levers to pivot in a direction to open said switch contacts; the poles of the magnets on said levers being repelled by the poles of the magnets of said second magnetic arrangement when said first and second terminals are moved close together.

Claim 5

Dependent Claim 84 words

An electrical unit according to claim 2, characterized in that the magnetic switch is a rotary switch And in that the two magnetic arrangements are ring magnets having a polarity such that these ring magnets are constrained to adopt a definite position when they approach each other, the switch being switched on in this position, and in that a spring is provided, which biases the ring magnet which is connected to the switch, into a position displaced by 90* from the said constrained position.

Claim 6

Dependent Claim 39 words

An electrical unit according to claim 2, characterized in that the magnetic switch is a push switch and in that the two magnetic arrangements are provided with permanent magnets which repel or attract each other against a spring bias.

Claim 7

Dependent Claim 82 words

An electrical unit according to claim 5, characterized in that the two magnetic arrangements are in the form of permanent magnets such that the opposing surfaces are magnetized as north and south poles over a region such that poles of the same polarity are disposed opposite each other and thereby exert a repulsive force on each other which actuates the push switch and thereby connects the corresponding terminals to the supply only when the electric appliance is in the correct operational position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-01-24	1975-07-26	1976-01-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-01-24	1979-07-26	1980-01-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-01-24	1983-07-26	1984-01-25	$7700.00	Window Closed / Lapsed

Electrical unit having a magnetic switch connecting a cordless electric power appliance to a charging appliance

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