US409736A - Telephone receiving-instrument - Google Patents
Telephone receiving-instrument Download PDFInfo
- Publication number
- US409736A US409736A US409736DA US409736A US 409736 A US409736 A US 409736A US 409736D A US409736D A US 409736DA US 409736 A US409736 A US 409736A
- Authority
- US
- United States
- Prior art keywords
- instrument
- telephone receiving
- bar
- telephone
- magnet
- 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
Links
- 229910000760 Hardened steel Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Definitions
- My invention relates to the construct-ion of a diaphragm and magnet of a receiving-im strument.
- Figure l is a longitudinal section
- Fig. 2 a cross-section on line 2 2 of Fig. l, of an instrument Containing my invention.
- A is a ease of substantially the ordinary form.
- B is the coil or helix.
- C are the binding-posts for connecting the instrument to line-Wires.
- D is the bar or magnet upon the end of which the eoil B is placed.
- the bar D is made of three pieees, the outer ones E being of hardened steel and the inner one F of soft steel or soft iron.
- This softiron central piece is longer than the others, and its end is drawn out, as at G, to a size and form sufficient to extend from the back end of the bar forward through the case to the front again, Where it is flattened so as to form thel diaphragm I.
- this return-piece is corrugated, as shown in Fig. l, so as to permit the adjustment of the diaphragm and magnet with reference to each other Without straining any of the parts.
- a button J of brass or other suitable material, to receive the screw K by which the adj ustment is effected.
- the diaphragm forms one pole ot the magnet., the other pole being the end of the bar adjacent to the diaphrag m I claiml.
- a magnet having the coil upon one end and having its other end flattened to form the diaphragn'l, With the corrugated portion II, substantially as set forth.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
(No Model.) R DUNGER TELEPHONE RECEIVING INSTRUMENT.
'Patented Aug. 27, 1889.
-....l HH! kan?,
Ny PETERS, Phoxc-Lnlwynpher, wauhingmn, n. c.
UNITED STATES PATENT OFFICE".
ROBERT DUNGER, OF CHICAGO, ILLINOIS.
TELEPHONE RECEIVING-INSTRUMENT.
SPECIFICATION forming part of Letters Patent No. 409,736, dated August 27, 1889.
Application led January 15, 1889. Serial No. 296,442. (No model.)
To @ZZ whom, it may concern:
Be it known that I, ROBERT DUNGER, of Chicago, Illinois, have invented certain new and useful Improvements in Telephone Receiving-Instruments, of which the following is a speeilieation;
My invention relates to the construct-ion of a diaphragm and magnet of a receiving-im strument.
In the accompanying drawings, Figure l is a longitudinal section, and Fig. 2 a cross-section on line 2 2 of Fig. l, of an instrument Containing my invention.
A is a ease of substantially the ordinary form.
B is the coil or helix.
C are the binding-posts for connecting the instrument to line-Wires.
D is the bar or magnet upon the end of which the eoil B is placed.
In the instrument shown in the drawings the bar D is made of three pieees, the outer ones E being of hardened steel and the inner one F of soft steel or soft iron. This softiron central piece is longer than the others, and its end is drawn out, as at G, to a size and form sufficient to extend from the back end of the bar forward through the case to the front again, Where it is flattened so as to form thel diaphragm I. At H this return-pieceis corrugated, as shown in Fig. l, so as to permit the adjustment of the diaphragm and magnet with reference to each other Without straining any of the parts. To the back end of the bar is secured a button J, of brass or other suitable material, to receive the screw K by which the adj ustment is effected.
By this construct-ion the diaphragm forms one pole ot the magnet., the other pole being the end of the bar adjacent to the diaphrag m I claiml. In a telephone-receiver,a magnet having the coil upon one end and having its other end flattened to form the diaphragn'l, With the corrugated portion II, substantially as set forth.
2. In a telephone, the combination of the hardened-steel portions E, the soft-metal poi'- tion F, the return-bar G, having its end flattened into the diaphragm I, and the corrugated portion I'I, substantially as set forth.
ROBERT DUNGER.
Titnessesz WM. S. BATES, ANDREW J. EGHERT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US409736A true US409736A (en) | 1889-08-27 |
Family
ID=2478671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US409736D Expired - Lifetime US409736A (en) | Telephone receiving-instrument |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US409736A (en) |
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0
- US US409736D patent/US409736A/en not_active Expired - Lifetime
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