公开(公告)号：US3338002A

公开(公告)日：1967-08-29

申请号：US42186664

申请日：1964-12-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： ERICSSON JAMES W ,  PRESCOTT ROBERT E

IPC: E04H1/14

CPC classification number: E04H1/14

公开(公告)号：US3676607A

公开(公告)日：1972-07-11

申请号：US3676607D

申请日：1969-11-25

Applicant: BELL TELEPHONE LABOR INC

Inventor： NASH DONALD H ,  NENNINGER THEODORE P ,  PRESCOTT ROBERT E

IPC: H01H13/702 ,  H01H13/703 ,  H01H13/785 ,  H04M1/23 ,  H04M1/50

CPC classification number: H01H13/785 ,  H01H13/702 ,  H01H13/703 ,  H01H2201/024 ,  H01H2201/032 ,  H01H2203/02 ,  H01H2203/05 ,  H01H2211/028 ,  H01H2217/01 ,  H01H2223/034 ,  H01H2229/026 ,  H01H2229/034 ,  H01H2229/036 ,  H01H2231/022 ,  H01H2239/006 ,  H01H2239/026 ,  H04M1/23

Abstract: This disclosure describes a telephone station dial having a compliant membrane supporting an array of pushbuttons. A conductive region on the membrane beneath each button contacts, on depression, printed circuit paths associated with two trigger circuits that in turn connect to a specific pair of multifrequency oscillator inputs. The trigger circuits comprise field effect transistors which provide a specified, unvarying output signal in response to the impedance change, either resistive or capacitive.

公开(公告)号：US3564164A

公开(公告)日：1971-02-16

申请号：US3564164D

申请日：1968-01-25

Applicant: BELL TELEPHONE LABOR INC

Inventor： PRESCOTT ROBERT E

IPC: H04M1/02 ,  B29C49/00 ,  B29C51/00 ,  H04M1/03

CPC classification number: H04M1/03 ,  B29C49/00 ,  B29C51/00 ,  B29L2031/3431 ,  B29L2031/3437

Abstract: The packaging of a telephone handset or base is simplified and assembly costs reduced by using a flowable adhesive hardening substance as an interior fill. The substance, such as polyurethane foam, retains all components in desired position, firmly bonds the mating shells together so that no other fastening is needed, and with the plastic shells forms a composite structure providing the required strength, rigidity, and protection against tampering and mechanical shock.

公开(公告)号：US3116365A

公开(公告)日：1963-12-31

申请号：US16017061

申请日：1961-12-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： PRESCOTT ROBERT E

IPC: H04N7/14

CPC classification number: H04N7/142

公开(公告)号：US3075280A

公开(公告)日：1963-01-29

申请号：US84729059

申请日：1959-10-19

Applicant: BELL TELEPHONE LABOR INC

Inventor： JACK ROBERT F ,  PRESCOTT ROBERT E ,  WHITE PHILIP R

IPC: H05K3/10 ,  H05K3/20

CPC classification number: H05K3/207 ,  H05K3/102 ,  H05K3/20 ,  H05K2201/09118 ,  H05K2203/0113 ,  H05K2203/1131 ,  Y10T29/49158 ,  Y10T29/49163 ,  Y10T428/1209 ,  Y10T428/12396

公开(公告)号：US2538621A

公开(公告)日：1951-01-16

申请号：US58988445

申请日：1945-04-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： HOPKINS HARRIS F ,  PRESCOTT ROBERT E

IPC: H04R9/04

CPC classification number: H04R9/045

公开(公告)号：US3457376A

公开(公告)日：1969-07-22

申请号：US3457376D

申请日：1965-11-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： KREISEL RALPH R ,  MATTKE CHARLES F ,  PRESCOTT ROBERT E

IPC: H04M1/05

CPC classification number: H04M1/05

公开(公告)号：US3377080A

公开(公告)日：1968-04-09

申请号：US42703065

申请日：1965-01-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： BARTLEY KEITH D ,  PRESCOTT ROBERT E

IPC: E04H1/14

CPC classification number: E04H1/14

公开(公告)号：US3300917A

公开(公告)日：1967-01-31

申请号：US40646864

申请日：1964-10-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： BARTLEY KEITH D ,  PRESCOTT ROBERT E

IPC: A47B19/04

CPC classification number: A47B19/04

公开(公告)号：US3290429A

公开(公告)日：1966-12-06

申请号：US38727564

申请日：1964-08-04

Applicant: BELL TELEPHONE LABOR INC

Inventor： PRESCOTT ROBERT E ,  WILDER LESLIE N

IPC: H01B7/04 ,  H01B7/18 ,  H04M1/15

CPC classification number: H04M1/15 ,  H01B7/04 ,  H01B7/181