MINIATURE VIBRATOR

• US 3,558,939 A
• Filed: 09/02/1969
• Issued: 01/26/1971
• Est. Priority Date: 09/02/1969
• Status: Expired due to Term

• Current Assignee: Kenneth N. Olson
• Original Assignee: Kenneth N. Olson
• Inventors: Olson, Kenneth N.
• Application Number:
  US04/854,677
• Time in Patent Office: 511 Days
• US Class Current: 310/15
• CPC Class Codes: G01D 5/08 Reducing the effects of friction, e.g. by applying vibrations

Abstract

For inducing antifriction vibrations in precision instruments, a miniature electromagnetic vibrator is provided which includes a cylindrical side housing of magnetic material having an upper peripheral edge providing an annular percussion surface. A core of magnetic material is press-fit within the side housing and has a wire coil circularly disposed about a portion thereof. A cupshaped top housing is threaded upon the upper end of the side housing. An armature has a disc-shaped striker portion disposed within the top housing, the striker portion having a diameter sufficient to span the percussion surface, and has a shank portion extending upwardly from the striker through an opening in the top housing. The shank is normally held in an elevated position by a spring to provide a clearance distance between the striker and percussion surface.

D R A W I N G

Claims

1. A vibrator comprising a stator, an armature, structure providing a magnetic flux path intercepting the armature when the stator is energized, and means mounting the armature for reciprocating movement relative to the stator for effecting intermittent force producing impact of a striker against a percussion surface, characterized in that the structure providing the magnetic flux path includes an elongated cylindrical base for housing the stator and having a bottom end adapted for connection with the mechanism to be vibrated and an annular top edge region providing an annular percussion surface, and that the means mounting the armature includes a generally cup-shaped member in axially adjustable nutlike connection with the top region of the base whereby the clearance distance between the striker and percussion surface can be adjusted.

2. A vibrator according to claim 1 wherein said cup-shaped member includes a top face having a central opening therein, and further characterized in that said armature is of generally pedestal shape having a disc portion disposed internally of said member and a shank portion extending through said Opening, said shank being spring mounted to said end face whereby said disc portion is normally urged against said top face, said disc portion being of a diameter sufficient to span said annular percussion surface.

3. A vibrator comprising a stator, an armature, structure providing a magnetic flux path intercepting the armature when the stator is energized, and means mounting the armature for reciprocating movement relative to the stator for effecting intermittent force producing impact between the armature and a percussion surface, said structure including an elongated cylindrical base of magnetic material and a pedestal-shaped core of magnetic material, said base having a threaded bottom end portion for boltlike connection with a mechanism to be vibrated and having a top edge region defining said percussion surface, said core having a first diameter portion disposed in internally press-fit engagement with the base adjacent the bottom end portion thereof and having reduced diameter portion extending upwardly from said first diameter portion and terminating below the plane defined by the top edge of the base to define an internal annular pocket within the base for receiving the stator, said means including a generally cup-shaped member in axially-adjustable nutlike connection with the base at the top edge region thereof.

4. A vibrator according to claim 3, wherein the base, the first diameter portion of the core, and the cup-shaped member respectively comprise the vibrator housing side, bottom and top walls.