Electromagnetic vibrator

• US 3,312,841 A
• Filed: 10/22/1963
• Issued: 04/04/1967
• Est. Priority Date: 10/22/1963
• Status: Expired due to Term

• Current Assignee: Shinobu Makino
• Original Assignee: Shinobu Makino
• Inventors: SHINOBU MAKINO
• Application Number:
  US04/318,046
• Time in Patent Office: 1,260 Days
• US Class Current: 310/15
• CPC Class Codes: H02K 33/04 wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation

Claims

6. IN AN ELECTRICAL VIBRATOR:

A BASE;

A FIRST CYLINDER EXTENDING SUBSTANTIALLY PERPENDICULARLY FROM SAID BASE;

AN ELECTROMAGNET HAVING A CORE EXTENDING IN A DIRECTION SUBSTANTIALLY PARALLEL TO SAID FIRST CYLINDER;

AND ARMATURE, SAID ARMATURE BEING SPACED FROM SAID ELECTROMAGNET CORE BY A PREDETERMINED DISTANCE;

AND A HOLDING FRAME TO SUPPORT DAID ARMATURE AND INCLUDING A SECOND CYLINDER ARRANGED SUBSTANTIALLY PARALLEL TO SAID FIRST CYLINDER AND BEING OF A DIAMETER DIFFERENT FROM THAT OF THE FIRST CYLINDER, SAID CYLINDERS FITTING, WITH CLEARANCE, ONE WITHIN THE OTHER, AND A RING-SHAPED RESILIENT BODY LOCATED IN THE CLEARANCE BETWEEN SAID CYLINDERS AND BEING ADHESIVELY SECURED THERETO, SAID HOLDING FRAME BEING SUPPORTED IN A FREELY HANGING POSITION BY SAID RESILIENT BODY, WITH THE LATTER STRESSED EXCLUSIVELY BY THE WEIGHT OF SAID HOLDING FRAME AND SAID ARMATURE SUPPORTED THEREBY.