Abstract A record player comprising a record turntable for receiving a record, a motor for driving said record turntable, a pickup for engaging said record, and a pickup arm which supports said pickup, said pickup arm being movable in a first mode backwards and forwards across said record turntable and in a second mode up and down so that said pickup can be moved into and out of engagement with a said record on said record turntable, said movement of said pickup arm in at least one of said first and second modes being effected by electro-mechanical means including an elongate conductive element and means for enabling an electric current to be applied to said conductive element, said conductive element being such that it becomes hot and elongates under the affect of said electric current and cools and contracts when said electric current is discontinued, and said pickup arm being caused to move one way consequent upon said elongation of said conductive element and said pickup arm being caused to move the other way consequent upon said contraction of said conductive element.
Inventors
👤 John Pelham Wren
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 20:12
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
201 words
A record player comprising a record turntable for receiving a record, a motor for driving said record turntable, a pickup for engaging said record, and a pickup arm which supports said pickup, said pickup arm being movable in a first mode backwards and forwards across said record turntable and in a second mode up and down so that said pickup can be moved into and out of engagement with a said record on said record turntable, said movement of said pickup arm in at least one of said first and second modes being effected by electro-mechanical means including an elongate conductive element, connection means for operationally connecting said conductive element with said pickup arm and means for enabling an electric current to be applied to said conductive element, said conductive element being such that it becomes hot and elongates under the effect of said electric current and cools and contracts when said electric current is discontinued, and said pickup arm being caused by said connection means to move one way consequent upon said elongation of said conductive element and said pickup arm being caused by said connection means to move the other way consequent upon said contraction of said conductive element.
Claim 2
Dependent Claim
201 words
A record player comprising a record turntable for receiving a record, a motor for driving said record turntable, a pickup for engaging said record, and a pickup arm which supports said pickup, said pickup arm being movable in a first mode backwards and forwards across said record turntable and in a second mode up and down so that said pickup can be moved into and out of engagement with a said record on said record turntable, said movement of said pickup arm in at least one of said first and second modes being effected by electro-mechanical means including an elongate conductive element, connection means for operationally connecting said conductive element with said pickup arm and means for enabling an electric current to be applied to said conductive element, said conductive element being such that it becomes hot and elongates under the effect of said electric current and cools and contracts when said electric current is discontinued, and said pickup arm being caused by said connection means to move one way consequent upon said elongation of said conductive element and said pickup arm being caused by said connection means to move the other way consequent upon said contraction of said conductive element.
Claim 3
Dependent Claim
75 words
A record player according to claim 1 in which said connection means includes a cylindrical member, and in which said elongate conductive element passes around said cylindrical member, said cylindrical member being caused to rotate one way consequent upon said elongation of said conductive element and said cylindrical member being caused to rotate the other way consequent upon said contraction of said conductive element, and said cylindrical member being operatively connected to said pickup arm.
Claim 4
Dependent Claim
34 words
A record player according to claim 1 in which said connection means includes pivot means, and in which said conductive element acts directly on said pivot means for raising and lowering said pickup arm.