公开(公告)号：US3227999A

公开(公告)日：1966-01-04

申请号：US20275662

申请日：1962-06-15

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W

IPC: H03M13/43 ,  H04L1/00

CPC classification number: H04L1/0059 ,  H03M13/43

公开(公告)号：US2745984A

公开(公告)日：1956-05-15

申请号：US27832352

申请日：1952-03-25

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W ,  WALKER LAURENCE R

IPC: H01J25/36

CPC classification number: H01J25/36

公开(公告)号：US3535473A

公开(公告)日：1970-10-20

申请号：US3535473D

申请日：1966-10-31

Applicant: BELL TELEPHONE LABOR INC

Inventor： FLANAGAN JAMES L ,  HAGELBARGER DAVID W

IPC: H04B3/23 ,  H04B3/20

CPC classification number: H04B3/238

公开(公告)号：US3417208A

公开(公告)日：1968-12-17

申请号：US50312165

申请日：1965-10-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W

IPC: H04M1/23

CPC classification number: H04M1/23

公开(公告)号：US3052413A

公开(公告)日：1962-09-04

申请号：US79877359

申请日：1959-03-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W

IPC: G06F7/38

CPC classification number: G06F7/388

公开(公告)号：US3675240A

公开(公告)日：1972-07-04

申请号：US3675240D

申请日：1969-12-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： ANDERSON ROBERT V ,  HAGELBARGER DAVID W

IPC: H03K17/972

CPC classification number: H03K17/972

Abstract: A magnetic keyboard and associated encoding circuitry are described. A permanent magnet on each of the keys of the keyboard alters the switching characteristics of a ferrite core associated with that key when the key is depressed. Logic circuitry is provided which determines when the addresses of depressed keys are to be entered in an output shift register and which addresses are to be transmitted. A unique lockout feature prevents both the transmission of address information from the output shift register if more than one key is depressed and the inadvertent retransmission of the address of a core already transmitted.

Abstract translation: 描述了磁性键盘和相关联的编码电路。 当键被按下时，键盘的每个键上的永磁体改变与该键相关联的铁氧体磁心的切换特性。 提供了逻辑电路，其确定何时将输入按键的地址输入到输出移位寄存器以及哪些地址将被发送。 独特的锁定功能可以防止输出移位寄存器的地址信息传输，如果按下多个键，并且已经发送了一个内核地址的意外重发。

公开(公告)号：US3461298A

公开(公告)日：1969-08-12

申请号：US5522666

申请日：1966-05-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W ,  HERRIOTT DONALD R

IPC: G01N21/59 ,  G06K7/10 ,  H01J23/30 ,  G01N21/30 ,  G11B7/08

CPC classification number: G06K7/10831 ,  G01N21/5911 ,  H01J23/30

公开(公告)号：US3242470A

公开(公告)日：1966-03-22

申请号：US21827162

申请日：1962-08-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W ,  HALL WILLIAM G ,  MALTHANCR WILLIAM A

IPC: G06F17/30

CPC classification number: G06F17/30955 ,  Y10S707/99931

公开(公告)号：US2958568A

公开(公告)日：1960-11-01

申请号：US56188856

申请日：1956-01-27

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W

IPC: B41J3/50 ,  B41J3/51

CPC classification number: B41J3/50 ,  B41J3/51

公开(公告)号：US3552004A

公开(公告)日：1971-01-05

申请号：US3552004D

申请日：1968-03-13

Applicant: BELL TELEPHONE LABOR INC

Inventor： HAGELBARGER DAVID W ,  KUBIK PETER S

IPC: H05K1/16 ,  H05K3/40 ,  H05K3/42 ,  H05K3/00

CPC classification number: H05K3/4038 ,  H05K1/165 ,  H05K3/42 ,  H05K2201/09118 ,  H05K2201/097 ,  H05K2203/0108 ,  H05K2203/0338 ,  Y10T29/49069 ,  Y10T29/49155 ,  Y10T29/4981

Abstract: METHODS FOR MAKING APERTURED MONOCONDUCTIVE COMPONENT BOARDS ARE DESCRIBED. IN PARTICULAR, THE METHODS ARE DIRECTED TO FORMING CONDUCTIVE PATHS THROUGH SUCH BOARDS BY BATCH FABRICATION TECHNIQUES ACCORDING TO WHICH A CONDUCTIVE MATERIAL IS READILY APPLIED TO THE INSIDES OF THE APERTURES.