US344333A - Tele phone-receiver - Google Patents
Tele phone-receiver Download PDFInfo
- Publication number
- US344333A US344333A US344333DA US344333A US 344333 A US344333 A US 344333A US 344333D A US344333D A US 344333DA US 344333 A US344333 A US 344333A
- Authority
- US
- United States
- Prior art keywords
- drum
- receiver
- tele phone
- cores
- core
- 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
- 238000010276 construction Methods 0.000 description 2
- 230000001976 improved effect Effects 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
- 229920001875 Ebonite Polymers 0.000 description 1
- 241000208967 Polygala cruciata Species 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
Definitions
- the object of my invention is to produce a telephone-receiver which will clearly and distinctly reproduce transmitted speech or signals with improved effect.
- Figure l is a view,- partly in section, with the casing removed, of so much of the instrumentas is necessary to illustrate my invention; and Fig. 2 is a similar view.
- A represents a barmagnet, which is to be arranged in the handle of the case of the instrument.
- On the end of this magnet is secured at soft-iron or magnetic pole-piece, B, having upright ends on which ordinary cores and electric bobbins are mounted, the ends being suiiieiently far apart to permit of the arrangement between the cores of a drum, 0, carrying two magnetic vibrating drum-heads, plates, or disks, (1, upon which the cores respectively act.
- the drum 0 may be formed of a metal rim, 0, in the outer edges of which .the vibrating plates or disks (1 are respect ively mounted in any suitable way.
- This drum may be formed with a solid center of hard rubber, vulcanized fiber, wood, or other suitable material, 0, which is slightly narrower than the surrounding metallic band 0, so as to leave vocalizing-chambers between the inner faces of the disks or plates and the sides of the block.
- the entire drum may be secured in place by a scre ⁇ v,f, which screws into thehandle-magnet A and into the solid core or filling e of the drum, as clearly shown in Fig. 1.
- the core a is cut away on each side, as shown at a, so as to form sound-passages which lead from the V0- calizirig-chamber on each side of the drum to a sound-aperture, a, in the periphery of the drum, which is to be arranged opposite the opening in the casin
- the instrument shown in Fig. 2 is of substantially similar construction, except that instead of making the drum with a core or iilling the drum may be hollow, a post, 0, being provided therein for the re ccption of the screw which fastens the drum to the handlemagnet.
- the combination of a magnet, A, apolcpiece secured thereon having two upright portions, a core and bobbin on each end thereof, a drum arranged between said cores, and :1 vibrating plate on each face of the drum in suitable proximity to one of said cores.
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Coils Or Transformers For Communication (AREA)
Description
(No Model.)
wfo. TURNBULL.
TELEPHONE RECEIVER. No. 344,333. Patented June 22, 1886.
rams.
\VILLIAM C. TURNBULL, OF BALTIMORE, MARYLAND.
TELEPHONE-RECEIVER.
SPECIFICATION forming part of Letters Patent No. 344,333, dated June 22, 1886.
Application filed February Q6, 1886. Serial No. 193,318. (No model.)
To all whom it may concern.-
Be it known that I, \VILLIAM O. TURNBULL, of Baltimore. in the State of Maryland, have invented an Improved Telcphone-Receiver, of which the following is a specification.
The object of my invention is to produce a telephone-receiver which will clearly and distinctly reproduce transmitted speech or signals with improved effect.
In the accompanying drawings, Figure l is a view,- partly in section, with the casing removed, of so much of the instrumentas is necessary to illustrate my invention; and Fig. 2 is a similar view.
A represents a barmagnet, which is to be arranged in the handle of the case of the instrument. On the end of this magnet is secured at soft-iron or magnetic pole-piece, B, having upright ends on which ordinary cores and electric bobbins are mounted, the ends being suiiieiently far apart to permit of the arrangement between the cores of a drum, 0, carrying two magnetic vibrating drum-heads, plates, or disks, (1, upon which the cores respectively act. The drum 0 may be formed of a metal rim, 0, in the outer edges of which .the vibrating plates or disks (1 are respect ively mounted in any suitable way. This drum may be formed with a solid center of hard rubber, vulcanized fiber, wood, or other suitable material, 0, which is slightly narrower than the surrounding metallic band 0, so as to leave vocalizing-chambers between the inner faces of the disks or plates and the sides of the block. The entire drum may be secured in place by a scre\v,f, which screws into thehandle-magnet A and into the solid core or filling e of the drum, as clearly shown in Fig. 1.
In this form of instrument the core a is cut away on each side, as shown at a, so as to form sound-passages which lead from the V0- calizirig-chamber on each side of the drum to a sound-aperture, a, in the periphery of the drum, which is to be arranged opposite the opening in the casin The instrument shown in Fig. 2 is of substantially similar construction, except that instead of making the drum with a core or iilling the drum may be hollow, a post, 0, being provided therein for the re ccption of the screw which fastens the drum to the handlemagnet.
I am aware of the patent of \Vaite, No. 298,924, and the patent of Gray, No. 204,029, and I make no claim to the construction shown therein.
I claim as my invention 1. The combination of a magnet, A, apolcpiece secured thereon having two upright portions, a core and bobbin on each end thereof, a drum arranged between said cores, and :1 vibrating plate on each face of the drum in suitable proximity to one of said cores.
2. The combination ofa hollow drum formed of a rim, 0, of metal or other suitable material, a vibrating plate which forms each side thereof, and a coil and core arranged in suitable proximity to eaclrvibrating plate, but not in contact therewith.
In testimony whereof I have hereunto subscribed my name.
VILLIAM G. TURNBULL.
\Vitnesses:
Geo. DIOOAFFRAY, E. O. DAVIDSON.
Publications (1)
Publication Number | Publication Date |
---|---|
US344333A true US344333A (en) | 1886-06-22 |
Family
ID=2413406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US344333D Expired - Lifetime US344333A (en) | Tele phone-receiver |
Country Status (1)
Country | Link |
---|---|
US (1) | US344333A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2634337A (en) * | 1947-12-05 | 1953-04-07 | Reginald B Bland | Combined microphone and receiver for audiphones |
-
0
- US US344333D patent/US344333A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2634337A (en) * | 1947-12-05 | 1953-04-07 | Reginald B Bland | Combined microphone and receiver for audiphones |
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