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US 4,788,676 AGranted
Record player
OwnerJames T. Dennisinventor
Life of this patent
Estimating the term…
Abstract
An improved automatic record player utilizes an integrally formed cam on the underside of the turntable in conjunction with a velocity trip mechanism to raise the tone arm from the record and move it up and over onto the rest post in one revolution of the turntable. An improved tone arm mount utilizes an integrally formed tone arm support shaft and trip finger assembly that is mounted from the underside of the base.
Claims25
A record player comprising:
- a base;
- a tone arm;
- a tone arm supporting member on said base, said supporting member having an upwardly extending bearing member and at least one aperture defined therein adjacent said bearing member;
- a tone arm shaft having at least one ear member extending axially from one end thereof, said tone arm shaft being concentrically disposed with respect to said supporting member with said ear member extending upwardly from beneath said base and through the aperture defined in said supporting member, said tone arm having an end that receives said ear member;
- and
- means engaging said ear member and said the arm for supporting said tone arm and said tone arm shaft on said bearing member.
3 more elements
A record player comprising:
- a base;
- a turntable rotatably mounted on said base, said turntable having a cam member disposed on the lower surface thereof;
- a tone arm mounted on said base;
- a rest position beyond said turntable;
- means for rotating said turntable;
- an end of record trip mechanism;
- cam follower means disposed beneath said turntable, said cam follower means normally being out of engagement with the cam member on the turntable;
- means responsive to said end of record trip mechanism for urging said cam follower means into engagement with said cam member;
- means for maintaining said cam follower means in engagement with said cam member for substantially a single revolution of said turntable, said cam follower means being moved out of engagement thereafter;
- and
- means interconnecting said cam follower means and said tone arm for moving the tone arm to the rest post during the substantially single revolution of the turntable that the cam follower means is in engagement with said cam membere said cam having a profile such that more than one-half of a revolution of the turntable is required to move the tone arm to the rest post.
8 more elements
A record player comprising:
- a base;
- a turntable rotatably mounted on said base, said turntable having a cam member on the lower surface thereof;
- a tone arm mounted on said base;
- a rest position beyond said turntable;
- means for rotating said turntable;
- an end of record trip mechanism;
- cam follower means disposed beneath said turntable, said cam follower means normally being out of engagement with the cam member on the turntable;
- means responsive to said end of record trip mechanism for urging said cam follower means into engagement with said cam member;
- means for maintaining said cam follower means in engagement with said cam member for substantially a single revolution of said turntable, said cam follower means being moved out of engagement thereafter;
- and
- means interconnecting said cam follower means and said tone arm for moving the tone arm to the rest post during the substantially single revolution of the turntable that the cam follower means is in engagement with said cam member, wherein said cam member is integrally molded to said turntable.
8 more elements
A record player comprising:
- a base;
- a turntable rotatably mounted on said base, said turntable having a cam member on the lower surface thereof;
- a tone arm mounted on said base;
- a rest position beyond said turntable;
- means for rotating said turntable;
- an end of record trip mechanism;
- cam follower means disposed beneath said turntable, said cam follower means normally being out of engagement with the cam member on the turntable;
- means responsive to said end of record trip mechanism for urging said cam follower means into engagement with said cam member;
- means for maintaining said cam follower means in engagement with said cam member for substantially a single revolution of said turntable, said cam follower means being moved out of engagement thereafter;
- and
- means interconnecting said cam follower means and said tone arm for moving the tone arm to the rest post during the substantially single revolution of the turntable that the cam follower means is in engagement with said cam member, wherein said cam includes a wall extending downwardly from the lower surface of said turntable, said wall being eccentrically disposed about the center of rotation of said turntable and having an inner and an outer surface and a gap therein, said cam follower means being positioned in a predetermined area within said wall when not in engagement with said cam member, said urging means being operative to move said cam follower means through said gap to cause the outer surface of said wall to engage said cam follower means, said cam follower means being operative to return to the predetermined area through said gap after the substantially single revolution of said turntable.
8 more elements
A record player comprising;
- a base;
- a tone arm;
- a tone arm supporting member on said base, said supporting member having an upwardly extending bearing member and a pair of apertures defined therein adjacent said bearing member;
- a tone arm shaft having a pair of opposed ear members extending axially from one end thereof, each of said ear members having an aperture defined therein, said tone arm shaft being disposed in a coaxial relationship with respect to said supporting member with said ear members extending upwardly from beneath said base and through the apertures defined in said supporting member, said tone arm having an end that receives said ear members, said receiving end having a pair of apertures in alignment with the apertures in said ear members;
- and
- a pin member extending through the apertures in said ear members and said tone arm and resting on said bearing member.
3 more elements
Dependencies are inferred from the claim text.