GALVANO-MAGNETRO EFFECT APPARATUS

• US 3,736,441 A
• Filed: 05/10/1972
• Issued: 05/29/1973
• Est. Priority Date: 05/12/1971
• Status: Expired due to Term

• Current Assignee: Masai Kuroyanagi, Noburu Masuda
• Original Assignee: Masai Kuroyanagi, Noburu Masuda
• Inventors: Masuda, Noburu, Kuroyanagi, Masai
• Primary Examiner(s): Albritton, C. L.
• Application Number:
  US05/252,090
• Time in Patent Office: 384 Days
• Field of Search: 338/32 340/365,174HA,174PM,174EB 178/17C,17R 335/205 235/145,146 179/9K 197/98 307/149
• US Class Current: 307/149
• CPC Class Codes: H03K 17/97 using a magnetic movable element
• CPC Class Codes: H03K 17/972 having a plurality of control members, e.g. keyboard

Abstract

A galvano-magnetro effect apparatus, wherein a plural number of gaps are formed in a direction at a right angle to the direction of a magnetic flux flowing in a looped magnetic path, galvanomagnetro effect devices are fixedly provided in said gaps, magnetic pieces which move in a direction at a right angle to the direction of the magnetic flux are provided in said gaps and said galvano-magnetro effect devices are selectively operated by actuating said magnetic pieces with a selecting means.

Claims

1. A galvano-magnetro effect apparatus comprised of a. a magnetic path having at least two gaps which are formed to intersect at a right angle to the direction of magnetic flux, b. at least one galvano-magnetro effect device being provided at the internal surface of a yoke end of the magnetic path forming each gap, c. a magnetic piece which is inserted into each gap so that it cAn be moved in a direction intersecting at a right angle to the direction of magnetic flux and varies the density of magnetic flux applied to said device by its movement, d. a resetting means which usually keeps each corresponding magnetic piece at its home position, e. operating levers which are respectively attached to said magnetic pieces and are arranged so that they are partly parallel each other, f. select bars in a number at least one larger than the number of operating levers which are arranged to overlap at a right angle to parallel-positioned parts of said operating levers and are usually prevented from being caused by said resetting means to depress the operating levers, g. selecting means which are respectively provided at least ones of said select bars and operating levers and selectively actuate at least one operating lever against the force of the resetting means for said select bars, and h. detection circuits which are provided respectively for said gaps and detect individually the actions of the devices provided in the gaps, wherein said magnetic pieces are moved against the resetting means by movement of said operating levers and selection of select bars by said selecting means is different.

2. A galvano-magnetro effect apparatus according to claim 1, wherein a group of select bars is comprised of at least two select bars which alternatively select one operating lever and one select bar which selects a plural number of operating levers in combinations.

3. A galvano-magnetro effect apparatus according to claim 1, wherein a group of select bars is comprised of at least two select bars which select a plural number of operating levers in different combinations and two select bars which alternatively select one operating lever.

4. A galvano-magnetro effect apparatus according to claim 1, wherein a group of select bars is comprised of at least four select bars which select a plural number of operating levers in different combinations.

5. A galvano-magnetro effect apparatus according to claim 1, wherein a selecting means is formed by a pushing edge which is divided by at least one notch provided at the select bar so that it is opposed to an operating lever which is not selected.

6. A galvano-magnetro effect apparatus according to claim 1, wherein a selecting means is formed by a projected part of a select bar which is opposed to an operating lever to be selected.

7. A galvano-magnetro effect apparatus according to claim 6, wherein said projected part of the select bar is threaded and fitted into the select bar.

8. A galvano-magnetro effect apparatus according to claim 1, wherein said magnetic path is comprised of one magnet positioned at the center, a pair of fixed yokes which are respectively attached to both ends of the magnet in T shape and at least one pair of independent yokes which are arranged between free ends of a pair of fixed yokes.

9. A galvano-magnetro effect apparatus according to claim 1, wherein said magnetic pieces move in the gaps only.

10. A galvano-magnetro effect apparatus according to claim 1, wherein a pair of galvano-magnetro effect devices are respectively arranged at vertical two positions in each gap and a large magnetic flux is alternatively applied to the devices according to movement of the magnetic piece.

11. A galvano-magnetro effect apparatus according to claim 1, wherein a pair of magnetic paths are formed so that the gaps are opposed each other and each pair of opposed magnetic pieces inserted respectively into the gaps of a pair of magnetic paths are respectively attached to both ends of one operating lever.

12. A galvano-magnetro effect device according to claim 11, wherein a pair of opposed magnetic pieces respectively attached to both ends of one operating lever are alternately opposed to a pair of the devices in accordance with movement of the operating levers.