US2048487A - Electromagnetic talking device - Google Patents

Electromagnetic talking device Download PDF

Info

Publication number
US2048487A
US2048487A US9758A US975835A US2048487A US 2048487 A US2048487 A US 2048487A US 9758 A US9758 A US 9758A US 975835 A US975835 A US 975835A US 2048487 A US2048487 A US 2048487A
Authority
US
United States
Prior art keywords
talking
head
wire
electromagnetic
open
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US9758A
Other languages
English (en)
Inventor
Begun Semi
Weiche Walter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2048487A publication Critical patent/US2048487A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive

Definitions

  • the so-called talking heads are known which are made in two parts hinged to each other. It is known also to provide such heads with guide ways which are to hold the sound record carrier, which is a steel wire or tape, in the best position with respect to the magnet cores.
  • the constructions, however, proposed heretofore have the disadvantage that th wire or tape must be threaded into these guide ways.
  • the invention has for its object to so construct the talking head that no such troublesome manipulation shall be necessary.
  • guides are arranged to bring the sound record carrier automatically in the proper position with respect to the magnet cores when the head becomes closed.
  • FIG. 1 is an end view of the talking head, shown as closed
  • Fig. 2 is a similar view to Fig. 1, the talking head shown as open
  • Fig. 3 is a plan to Fig. 2.
  • the talking head consists of two parts I and 2 fixed to each other by a hinge 3.
  • Helical springs 4 act to close the head I, 2 so as to hold the two parts in their operative position.
  • Rigidly attached to the parts I and 2 are guide pieces 5, made of brass, for example.
  • the shape of the pieces 5 will be seen from Fig. 2.
  • the sound record carrier is a steel wire 6.
  • the guide pieces 5 are arcuate at their upper edges and overlap each other in such manner that two adjacent pieces 5, irrespective of the angle to which the talking head is opened, complete one another to form common curved surface 1 for the wire 8 to rest upon.
  • each guide piece 5 has a second curved or arcuate edge 8 so disposed above the surface I as to prevent the wire from jumping out of the head when this closes.
  • the pieces 5 thus are in the nature of grippers, which act to bring the wire in the proper position to the cores 8 of the magnet coils III. In the drawing, two pairs of such grippers are represented. It will be apparent, however, that any suitable number thereof may be provided.
  • the cores 9 are in a well-known manner flush with the grooves ll provided in the parts I, 2 to encompass the wire 6 when the talking head has been closed. Equally, the coils III are flush with the inner surfaces of the parts I, 2.
  • the head If the head is in its closed state, i. e. that shown in Fig. 1, the parts- I and 2 are pressed against each other by the springs 4 which thus tend to hold the talking head closed. With the position represented in Fig. 2 the springs 4 tend to maintain the talking head in its open position. Owing to this arrangement the head can be opened simply by exerting a pressure on the parts I and 2, when the head is fitted with wire 6 in the manner described and then by a second pressure caused to collapse.
  • a talking head for an electromagnetic talking machine comprising relatively movable portions adapted to close around a record wire, supporting surfaces which provide an open receiving support for the wire when said movable portions are open and auxiliary surfaces adapted to constrain the wire into correct talking position during the closure of said movable portions.
  • a talking head for an electromagnetic talking machine comprising two relatively movable hinged portions adapted to close together around a filamentary record carrier and comprising guide pieces shaped so as to provide an open guide for said filamentary record carrier when said movable portions are open and to guide the carrier into correct talking position when said movable portions come together.
  • an electromagnetic talking head having portions adapted to be opened or closed about a record filament, guide pieces shaped to provide a substantially continuous supporting surface for the filament in every position of said portions, said surface being open to receive the filament when said portions are open, and said surface being positioned to support the carrier in correct talking relation to the head when said portions are closed.
  • a talking head for an electromagnetic talking machine comprising relativelymovable portions adapted to close around a record wire in combination with means for elastically maintaining said movable portions in either their open or their closed position, and guide surfaces open when said portions are open, so disposed as to guide said wire into correct talking position during the closure of said portions.
  • An electromagnetic talking head comprising guide parts hinged to one another and adapted to close around a record filament, spring means

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Telephone Set Structure (AREA)
US9758A 1934-03-08 1935-03-07 Electromagnetic talking device Expired - Lifetime US2048487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2048487X 1934-03-08

Publications (1)

Publication Number Publication Date
US2048487A true US2048487A (en) 1936-07-21

Family

ID=7982542

Family Applications (1)

Application Number Title Priority Date Filing Date
US9758A Expired - Lifetime US2048487A (en) 1934-03-08 1935-03-07 Electromagnetic talking device

Country Status (2)

Country Link
US (1) US2048487A (fr)
FR (1) FR786594A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456767A (en) * 1945-11-29 1948-12-21 Armour Res Found Combination of magnetic transducing and erasing heads
US2480742A (en) * 1945-05-30 1949-08-30 Conn Ltd C G Magazine type magnetic recording apparatus
US2656420A (en) * 1945-06-23 1953-10-20 Reuben A Isberg Recorder head
US2708694A (en) * 1946-07-30 1955-05-17 Clevite Corp Hum bucking magnetic record transducing heads
US2867439A (en) * 1954-03-25 1959-01-06 Heurtier & Cie Ets Sound reading device for kinematographic projectors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480742A (en) * 1945-05-30 1949-08-30 Conn Ltd C G Magazine type magnetic recording apparatus
US2656420A (en) * 1945-06-23 1953-10-20 Reuben A Isberg Recorder head
US2456767A (en) * 1945-11-29 1948-12-21 Armour Res Found Combination of magnetic transducing and erasing heads
US2708694A (en) * 1946-07-30 1955-05-17 Clevite Corp Hum bucking magnetic record transducing heads
US2867439A (en) * 1954-03-25 1959-01-06 Heurtier & Cie Ets Sound reading device for kinematographic projectors

Also Published As

Publication number Publication date
FR786594A (fr) 1935-09-05

Similar Documents

Publication Publication Date Title
US2951654A (en) Endless tape cartridge and actuating mechanism
US2048487A (en) Electromagnetic talking device
US2189547A (en) Film reel
US3195825A (en) Recording and reproducing apparatus
US2631859A (en) Phonograph record
AU614559B2 (en) Cassette recording-medium recording and/or reproducing apparatus
US3961763A (en) Device for guiding a magnetic tape in a recording cassette
US2563850A (en) Magnetic tape recorder
US2817516A (en) Sound tape container
US2801811A (en) Tape reel latch
US2551845A (en) Recording head assembly
US1352602A (en) Lid-support for talking-machines
US2385945A (en) Stylus
US2621998A (en) Door opening detector device
US3375990A (en) Reel cover and apparatus for mounting on a reel
US2639867A (en) Tape reel mounting
US3508695A (en) Guide structure for record carrying drum
US1566807A (en) Thread guide
US2234714A (en) Film gate structure
US2852254A (en) Magnetic recorder
US2447999A (en) Portable phonograph
US2532436A (en) Journal box lid
US1311501A (en) Hair-spring and balance mounting.
US3636274A (en) Tape machine head cap removably mountable for wear prevention
US1590040A (en) Lid support