US4369579A — Device for drawing a pattern on a support, partic…

Claim 1

Independent Claim 235 words

Device for drawing a pattern or design on a support, comprising a pencil holder fast with a magnetic piece sliding on a plate and moved, through said plate, by a first magnet, characterized in that said device comprises: a box, generally parallelepipedic in form, with an upper wall composed of non-magnetic material, in this box: a carriage movable along the X- and Y-axes relatively to the plane of the upper wall of the box, control means for displacing the carriage along the X- and Y-axes, a first magnet mounted on the carriage, one of its magnetic poles, called first pole, facing the upper wall of the box, a pencil-holder adapted to rest on the outer face of said upper wall of the box, this pencil-holder comprising: (a) a guide for receiving and holding at least laterally a pencil with the axis thereof not parallel to the plane of said upper wall and with the active tip of the pencil in contact with a drawing support resting on the upper wall of the box, (b) a second ring magnet adapted to cooperate with the first magnet, its pole opposite that of said first pole facing downwards, the opening of the second magnet being placed opposite the guide so as to surround the end of the pencil, and (c) at least one sliding member by which the pencil holder is adapted to slide on said drawing support.

Claim 2

Dependent Claim 235 words

Device for drawing a pattern or design on a support, comprising a pencil holder fast with a magnetic piece sliding on a plate and moved, through said plate, by a first magnet, characterized in that said device comprises: a box, generally parallelepipedic in form, with an upper wall composed of non-magnetic material, in this box: a carriage movable along the X- and Y-axes relatively to the plane of the upper wall of the box, control means for displacing the carriage along the X- and Y-axes, a first magnet mounted on the carriage, one of its magnetic poles, called first pole, facing the upper wall of the box, a pencil-holder adapted to rest on the outer face of said upper wall of the box, this pencil-holder comprising: (a) a guide for receiving and holding at least laterally a pencil with the axis thereof not parallel to the plane of said upper wall and with the active tip of the pencil in contact with a drawing support resting on the upper wall of the box, (b) a second ring magnet adapted to cooperate with the first magnet, its pole opposite that of said first pole facing downwards, the opening of the second magnet being placed opposite the guide so as to surround the end of the pencil, and (c) at least one sliding member by which the pencil holder is adapted to slide on said drawing support.

Claim 3

Dependent Claim 31 words

The device of claim 1, wherein the upper wall of the box is translucent and a source of light of reduced dimensions is placed on the carriage opposite this upper wall.

Claim 4

Dependent Claim 31 words

The device of claim 2, wherein said source of light is an electric lamp whose electric current supply is controlled by a manoeuvring member placed on the outside of the box.

Claim 5

Dependent Claim 75 words

The device of claim 1, wherein the guide further comprises stop means on which the pencil may rest by counter-stop means, said guide being mounted on a body of the pencil-holder, via an elastic member allowing a downward movement of said guide with respect to said body, by application of a force, the latter resting on the upper wall of the box via the sliding member and the second magnet is mounted on said guide.

Claim 6

Dependent Claim 30 words

The device of claim 1, wherein the guide is designed to allow the pencil to slide in the direction of its axis when this pencil is received in said guide.

Claim 7

Dependent Claim 24 words

The device of claim 1, wherein the first magnet is ring-shaped and the source of light is placed opposite the opening of this magnet.

Claim 8

Dependent Claim 25 words

The device of claim 1, wherein the opening of the second ring magnet is placed opposite the guide so as to surround the axis thereof.

Claim 9

Dependent Claim 19 words

The device of claim 1, wherein at least the upper wall of the box is made of plastics material.

Claim 10

Dependent Claim 180 words

The device of claim 1, wherein the means for controlling the displacement of the carriage along the X- and Y-axes comprise: a first endless screw pivoting in bearings in the box, this screw being oriented along one of the directions (X and Y) and cooperating with a nut fast with an intermediate carriage mounted to move in the box in this latter direction, a first motor for driving this first endless screw, a second endless screw oriented in the other direction and pivoting in bearings in the intermediate carriage, a second motor for driving this second endless screw, the latter cooperating with a nut fast with the carriage bearing the first magnet, each of said motors being of the D.C. type with two directions of motion and being connected to a source of electric current via an electrical connection on which is interposed a reversing switch particular to said motor, each reversing switch comprising two contactors, the closed position of each of these contactors corresponding to the supply of the motor in question with a current in a corresponding direction.

Claim 11

Dependent Claim 77 words

The device of claim 9, wherein the contactors are of the open type at rest and they are distributed spatially along a closed curve so that the two contactors associated with the same motor are placed opposite each other, and a manoeuvring member placed inside this closed curve may move in the direction of each of said contactors to act on an element for controlling this contactor with a view to placing the latter in closed position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-01-24	1986-07-26	1987-01-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-01-24	1990-07-26	1991-01-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-01-24	1994-07-26	1995-01-25	$7700.00	Window Closed / Lapsed

Device for drawing a pattern on a support, particularly for use as a toy

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