ELECTROMAGNETIC VIBRATOR

• US 3,775,625 A
• Filed: 11/06/1972
• Issued: 11/27/1973
• Est. Priority Date: 11/15/1969
• Status: Expired due to Term

• Current Assignee: Eduard Reichert, Gerd Fechner, Leo Brosch
• Original Assignee: Eduard Reichert, Gerd Fechner, Leo Brosch
• Inventors: Brosch, Leo, Fechner, Gerd, Reichert, Eduard
• Primary Examiner(s): Duggan, D. F.
• Application Number:
  US05/303,823
• Time in Patent Office: 386 Days
• Field of Search: 310/17,18,28,29,15,21,22,37,33,27,19 267/161
• US Class Current: 310/19
• CPC Class Codes: H02K 33/02 with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Abstract

An electromagnetic vibrator wherein the armature is coupled to and supported on its associated mass by means of an adjustable coupling arrangement so that the armature and its mass are spaced from one another. A central disc spring element is arranged between the armature and the associated mass to bias these elements away from each other with a force sufficient to prevent relative movement between the armature and its associated mass. One or a plurality of disc springs may be used, and a guide means is generally provided on the mass for positioning the spring or springs. By adjusting the coupling means, and consequently the bias face exerted by the disc spring, the space between the armature and its associated mass is varied which simultaneously varies the operational air gap of the vibrator between the armature and its associated core.

Claims

1. In an electromagnetic vibrator including an armature, the improvement comprising:

a. a mass associated with said armature and spaced therefrom to define an air space therebetween;

b. adjustable means coupling said mass to said armature; and

c. a centrally located disc spring means arranged between said armature and said associated mass and exerting a sufficient force for biasing said armature and associated mass so that, in cooperation with said adjustable coupling means, a desired air space setting is maintained between said armature and said associated mass and said armature and said associated mass move as a unit during vibration of the vibrator, whereby by adjusting said coupling means, said air space and consequently the operational air gap of said vibrator adjacent said armature is adjusted without affecting the vibrating characteristics of the vibrator.

2. An electromagnetic vibrator as defined in claim 1, wherein said disc spring means has at least two oppositely directed and contacting disc springs.

3. An electromagnetic vibrator as defined in claim 2, wherein said disc spring means is a plurality of disc springs arranged in a combination of oppositely directed springs and same directed springs.

4. An electromagnetic vibrator as defined in claim 3, wherein at least two contacting disc springs are arranged in the same direction.

5. An electromagnetic vibrator as defined in claim 4, wherein one of said armature and said associated mass defines a guide means for said spring means.

6. An electromagnetic vibrator as defined in claim 5, wherein said guide means iS a centrally located, cylindrical member protruding from said associated mass.

7. An electromagnetic vibrator as defined in claim 6, further including a recess defined in said armature for receiving said member.

8. An electromagnetic vibrator as defined in claim 5, wherein said guide means is a centrally located, cylindrical recess defined in said associated mass and configured to receive at least one of said disc springs.

9. In an electromagnetic vibrator including a magnetic armature mounted for vibratory movement relative to a magnetic core, and a free mass associated with said armature, the improvement comprising:

an adjustable means for coupling said armature to said mass so that said armature is adjustably displaceable relative to said free mass in the direction of the vibratory movement of the vibrator; and

a centrally located disc spring means arranged between said armature and said free mass for biasing said armature and said free mass apart to provide an air space therebetween, said spring means exerting a sufficient force so that said armature and said associated mass move as a unit during vibration of the vibrator, whereby adjustment of said coupling means varies the position of said armature relative to said mass and thereby the operational air gap of said vibrator between said armature and said core.

10. The electromagnetic vibrator as defined in claim 9 wherein said adjustable coupling means comprises an armature coupling piece which forms part of said mass and which extends parallel to the plane of said armature, and a plurality of bolts extending through openings in said coupling piece and threadingly engaging said armature.