Vibratory stone polisher

Claim 2

Vibratory polishing apparatus comprising: a base, a rigid arm pivotally mounted on the base, electromagnetic means for reciprocally and pivotally displacing the arm relative to the base, a support bracket pivotally connected at one side to the base and at the other side to the arm to be reciprocally displaced thereby through a substantially vertical path upon pivotal displacement of said rigid arm, a polishing barrel having a non-flat interior surface and being attachable to the support bracket to be displaced therewith, and spring means for mechanically bilaterally resisting the displacement of the arm.

Claim 3

Apparatus as defined in claim 1 wherein the spring means includes means for selectively varying the spring resistance thereof for tuning the amplitude of displacement of the arm.

Claim 4

Apparatus as defined in claim 2 wherein the arm comprises a series of laminations and the electromagnetic means comprises a coil having a laminated core which is spaced from the arm by means of an air gap.

Claim 5

Apparatus as defined in claim 3 wherein the spring means comprises a threaded shaft secured to the base and extending through an aperture in the arm and a pair of springs disposed on the shaft and engaging opposite sides of the arm.

Claim 6

Apparatus as defined in claim 1 wherein the support bracket is generally arcuate and is pivotally connected to the resilient standard which in turn is connected to the base, the barrel being generally cylindrical in configuration and disposed on said bracket with the cylindrical axis thereof perpendicular to the arm and to the direction of displacement thereof and having an opening in the top thereof.

Claim 7

Apparatus as defined in claim 5 wherein the barrel has inwardly tapering end walls spaced apart along said cylindrical axis.

Claim 8

Vibratory polishing apparatus comprising: a base, a barrel support bracket, and a cylindrical polishing barrel removably secured to the bracket, a spring standard connected between one side of the bracket and the base for resilient support of the bracket and barrel relative to the base, a rigid arm of low magnetic reluctance material mounted for substantially vertical reciprocal pivotal displacement relative to the base, means pivotally securing the free end of the rigid arm to the other side of the bracket such that pivotal displacement of said arm results in vibratory displacement of the barrel substantially perpendicular to the cylindrical axis of the barrel, bidirectional spring means connected between the base and the rigid arm for resiliently resisting displacement thereof, means for adjusting the spring force of the bidirectional spring means for controlling the amplitude of vibratory displacement of the barrel, and electromagnetic motor means for causing intermittent pivotal displacement of said rigid arm relative to the base.

Claim 9

Vibratory polishing apparatus comprising: a base, a barrel support bracket, and a cylindrical polishing barrel removably secured to the bracket, a spring standard connected between one side of the bracket and the base for resilient support of the bracket and barrel relative to the base, a rigid arm of low magnetic reluctance material mounted for substantially vertical reciprocal pivotal displacement relative to the base, means pivotally securing the free end of the rigid arm to the other side of the bracket such that pivotal displacement of said arm results in vibratory displacement of the barrel substantially perpendicular to the cylindrical axis of the barrel, bidirectional spring means connected between the base and the rigid arm for resiliently resisting displacement thereof, means for adjusting the spring force of the bidirectional spring means for controlling the amplitude of vibratory displacement of the barrel, and electromagnetic motor means for causing intermittent pivotal displacement of said rigid arm relative to the base.