Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
An electromagnetic solenoid comprising: a yoke having a hollow cylinder, an electromagnetic coil wound around said cylinder and connectable to a power source, a plunger slidably inserted in said cylinder and rendered movable in said cylinder upon energization of said coil, said plunger and cylinder each having a confronting surface which is faced by a confronting surface of the other of said plunger and cylinder during sliding movement of the plunger, the confronting surface of at least one of said plunger and cylinder having a plurality of separated grooves formed therein each extending in a direction perpendicular to the direction of sliding movement and separated along said direction of sliding movement, and a highly viscous braking substance positioned in said grooves for reducing the speed of movement of said plunger in said cylinder.
Claim 2
Dependent Claim
133 words
An electromagnetic solenoid comprising: a yoke having a hollow cylinder, an electromagnetic coil wound around said cylinder and connectable to a power source, a plunger slidably inserted in said cylinder and rendered movable in said cylinder upon energization of said coil, said plunger and cylinder each having a confronting surface which is faced by a confronting surface of the other of said plunger and cylinder during sliding movement of the plunger, the confronting surface of at least one of said plunger and cylinder having a plurality of separated grooves formed therein each extending in a direction perpendicular to the direction of sliding movement and separated along said direction of sliding movement, and a highly viscous braking substance positioned in said grooves for reducing the speed of movement of said plunger in said cylinder.
Claim 3
Dependent Claim
32 words
An electromagnetic solenoid according to claim 1, in which said space comprises a plurality of grooves formed on the inner circumference of said cylinder, and said plunger has a smooth continuous circumference.
Claim 4
Dependent Claim
27 words
An electromagnetic solenoid according to claim 1, in which spring means engages said plunger to reduce the movement speed of the plunger when the solenoid is energized.
Claim 5
Dependent Claim
31 words
An electromagnetic solenoid according to claim 2, in which said braking substance is selected from silicon oil and silicon grease having a viscosity of 200,000 -1,000,000 cs measured at 25° C.
Claim 6
Dependent Claim
30 words
An electromagnetic solenoid according to claim 2, in which said braking substance is selected from silicon oil and silicon grease having a viscosity of 200,000-1,000,000 cs measured at 25° C.
Claim 7
Dependent Claim
51 words
An electromagnetic solenoid according to claim 3, in which said spring means comprises two spring members, one of which exerts its spring force throughout the movement of the plunger and the other exerts its spring force when the plunger approaches the end of its movement toward the bottom of said cylinder.
Claim 8
Dependent Claim
40 words
An electromagnetic solenoid according to claim 6, in which said plunger has a needle-like rod extending through the bottom of said cylinder, and said rod has attached thereto stopper means in the portion protruding beyond the bottom of the cylinder.
Claim 9
Dependent Claim
57 words
A lifter for a tone arm of a record player having an electromagnetic solenoid of claim 1, in which said plunger has a coupling member secured thereto and an end of this coupling member away from said solenoid is in contact with the tone arm, whereby the tone arm is movable with the movement of said plunger.
Claim 10
Dependent Claim
25 words
A driving apparatus having an electromagnetic solenoid of claim 1 and arranged to move an object by the movement of the plunger of said solenoid.
Claim 11
Dependent Claim
28 words
An electromagnetic solenoid according to claim 1, in which said electromagnetic coil has a time constant circuit between said coil and a power source connectable to said coil.