Cleaning of gramophone records

Claim 2

A gramophone pick-up comprising an assembly which comprises a pick-up arm and a pick-up cartridge including a stylus, a first part attached to said assembly, a second part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, a record-cleaning device, carried by said second part, in the form of a brush for engagement with the playing surface of a record whilst it is being played, a third part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, and a record-cleaning device, carried by said third part, in the form of a pad for engagement with the playing surface of a record whilst it is being played, one of said second and third parts having its pivoting limited by a portion thereof abutting a portion of said first part and the other of the second and third parts having its pivoting limited by a portion thereof abutting a portion of said one part, the construction and arrangement of said first, second and third parts being such that said second part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said brush which contacts the record comes vertically below its pivot axis when the pick-up is in use and said third part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said pad which contacts the record comes vertically below its pivot axis when the pick-up is in use.

Claim 3

A pick-up according to claim 1, in which said one part includes a substantially L-shaped portion, one leg of which engages said portion of the first part to limit pivoting of said one part and the other leg of which has one of the record-cleaning devices mounted at its free end, and said other part includes two substantially parallel and substantially L-shaped portions side by side and spaced apart, between which is some of said one part, the other of the record-cleaning devices being mounted on the free ends of an arm of one of these portions and an arm of the other of these portions, the free ends of the other arms of these portions being connected together by a connecting piece which abuts said portion of said one part, which is on said other leg.

Claim 4

A pick-up according to claim 1, in which said one part is said second part.

Claim 5

A pick-up according to claim 1, in which, in use, said brush engages the record at a greater distance from said stylus than does said pad.

Claim 6

A pick-up according to claim 1, in which said second and third parts have a common pivot axis.

Claim 7

A pick-up according to claim 5, in which said one part includes a substantially L-shaped portion, one leg of which engages said portion of the first part to limit pivoting of said one part and the other leg of which has one of the record-cleaning devices mounted at its free end, and said other part includes two substantially parallel and substantially L-shaped portions side by side and spaced apart, between which is some of said one part, the other of the record-cleaning devices being mounted on the free ends of an arm of one of these portions and an arm of the other of these portions, the free ends of the other arms of these portions being connected together by a connecting piece which abuts said portion of said one part, which is on said other leg.

Claim 8

A pick-up according to claim 6, in which said first part includes a pivot pin supported only at its centre, said two portions of said other part defining holes into which project the ends of said pivot pin, and said one part defining a recess where its two legs join in which said pin lies.

Claim 9

An attachment for a gramophone pick-up which comprises an assembly of a pick-up arm and a pick-up cartridge including a stylus, the attachment comprising a first part for attachment to the assembly, a second part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, a record-cleaning device, carried by said second part, in the form of a brush for engagement with the playing surface of a record whilst it is being played, a third part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, and a record-cleaning device, carried by said third part, in the form of a pad for engagement with the playing surface of a record whilst it is being played, one of said second and third parts having its pivoting limited by a portion thereof abutting a portion of said first part and the other of the second and third parts having its pivoting limited by a portion thereof abutting a portion of said one part, the construction and arrangement of said first, second and third parts being such that said second part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said brush which contacts the record comes vertically below its pivot axis when the pick-up is in use and said third part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said pad which contacts the record comes vertically below its pivot axis when the pick-up is in use.

Claim 10

An attachment for a gramophone pick-up which comprises an assembly of a pick-up arm and a pick-up cartridge including a stylus, the attachment comprising a first part for attachment to the assembly, a second part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, a record-cleaning device, carried by said second part, in the form of a brush for engagement with the playing surface of a record whilst it is being played, a third part pivotally connected to said first part with a pivot axis which is substantially horizontal when the pick-up is in use, and a record-cleaning device, carried by said third part, in the form of a pad for engagement with the playing surface of a record whilst it is being played, one of said second and third parts having its pivoting limited by a portion thereof abutting a portion of said first part and the other of the second and third parts having its pivoting limited by a portion thereof abutting a portion of said one part, the construction and arrangement of said first, second and third parts being such that said second part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said brush which contacts the record comes vertically below its pivot axis when the pick-up is in use and said third part can pivot with respect to said first part about its pivot axis but its pivoting is limited in that it is prevented from pivoting so far in one direction that the part of said pad which contacts the record comes vertically below its pivot axis when the pick-up is in use.

Claim 11

An attachment according to claim 8, in which said one part includes a substantially L-shaped portion, one leg of which engages said portion of the first part to limit pivoting of said one part and the other leg of which has one of the record-cleaning devices mounted at its free end and said other part includes two substantially parallel and substantially L-shaped portions side by side and spaced apart, between which is some of said one part, the other of the record-cleaning devices being mounted on the free ends of an arm of one of these portions and an arm of the other of these portions, the free ends of the other arms of these portions being connected together by a connecting piece which abuts said portion of said one part, which is on said other leg.

Claim 12

An attachment according to claim 8, in which said one part is said second part.

Claim 13

An attachment according to claim 8, in which, in use, said brush engages the record at a greater distance from the stylus than does said pad.

Claim 14

An attachment according to claim 8, in which said second and third parts have a common pivot axis.

Claim 15

An attachment according to claim 12, in which said one part includes a substantially L-shaped portion, one leg of which engages said portion of the first part to limit pivoting of said one part and the other leg of which has one of the record-cleaning devices mounted at its free end and said other part includes two substantially parallel and substantially L-shaped portions side by side and spaced apart, between which is some of said one part, the other of the record-cleaning devices being mounted on the free ends of an arm of one of these portions and an arm of the other of these portions, the free ends of the other arms of these portions being connected together by a connecting piece which abuts said portion of said one part, which is on said other leg.

Claim 16

An attachment according to claim 13, in which said first part includes a pivot pin supported only at its centre, said two portions of said other part defining holes into which project the ends of said pivot pin, and said One part defining a recess where its two legs join in which said pin lies.