US303809A - Telephone - Google Patents
Telephone Download PDFInfo
- Publication number
- US303809A US303809A US303809DA US303809A US 303809 A US303809 A US 303809A US 303809D A US303809D A US 303809DA US 303809 A US303809 A US 303809A
- Authority
- US
- United States
- Prior art keywords
- coil
- horseshoe
- telephone
- magnet
- bend
- 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
- 210000003414 Extremities Anatomy 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 4
- 238000010276 construction Methods 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 consists of an improved construction el"reeeivingtelephone, as more fully described hereinafter.
- Figure 1 is a vertical section through the ease of my improved. telephonie receiver.
- Fig. 2 is avertcal section ofthe instrument at right angles to that of Fig. l, and Fig. 3 is a section on the line l 2.
- A is the iuelosing-case, which may be of any desired shape, and provided with the usual perforated screw cap, A', forming the earpiece and inclosing the diaphragm B.
- the electro-magnet E is of the horseshoe type, the two polar extremities c e being surrounded bythe same coil D. Between the two legs of the horseshoe. behind the coil D, I wind longitudinally a coil, F, over transverse pinsfj", the two coils being in the same circuit and having their terminals connected to the usual binding-posts, j) p.
- the pin j' I prefer to make of some noir magnetic material; but the pin f is magnetic, or has a magnetic ferrule forming the bend of the horseshoe, which, as usual, is a permanent magnet as well as an electro-magnet.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Toys (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Electromagnets (AREA)
Description
(No Model.)
A. P. CONGDON.
TELEPHONE.
No. 303,809. Patented Aug. 19, 1884.
FGZ
Flai.
IINTTED STATES PATeNT Trice.
ALBERT' F. CONGDON, OF PHILADELPHIA, ASSIGNOR T() VILLIAM KENNY- SON, OF NORRISTOVN, PENNSYLVANIA.
TELEPHONE.
SPECIFICATION forming part of Letters Patent No. 303,809, dated August; 19, 1884,
Application tiled March 5, 1884. (No model.)
To (tu wiz/ont TL may concern.:
e it known. that I, ALBERT F. CoNGDoN, ol' Philadelphia, Pennsylvania, have invented certain Improvements in Telephones, of which the following is a speeilieation.
My invention consists of an improved construction el"reeeivingtelephone, as more fully described hereinafter.
In the accompanying drawings, Figure 1 is a vertical section through the ease of my improved. telephonie receiver. Fig. 2 is avertcal section ofthe instrument at right angles to that of Fig. l, and Fig. 3 is a section on the line l 2.
A is the iuelosing-case, which may be of any desired shape, and provided with the usual perforated screw cap, A', forming the earpiece and inclosing the diaphragm B.
The electro-magnet E is of the horseshoe type, the two polar extremities c e being surrounded bythe same coil D. Between the two legs of the horseshoe. behind the coil D, I wind longitudinally a coil, F, over transverse pinsfj", the two coils being in the same circuit and having their terminals connected to the usual binding-posts, j) p.
The pin j', I prefer to make of some noir magnetic material; but the pin f is magnetic, or has a magnetic ferrule forming the bend of the horseshoe, which, as usual, is a permanent magnet as well as an electro-magnet. The connecting-piece g, into which passes the re4 taining-screw y', Vforms part of the permanent magnet, while the spacingblock h may or may not be of magnetic material, as desired. A
telephonie receiver.constructed as described, an d provided with the coil F,wonn d round the bend of the horseshoe and along the legs, I have found to be much more efiicient and to give better results than without the coil. deed, I have obtained satisfactory results in reproducing speech with the coil F only in eircuit, the coil D being removed; but the use of the two combined is the best.
I claim as my inventionl. The combination of the case and diaphragm of a reeeiving-telephone with a horseshoe-magnet having a coil wound over the bend and longitudinally of the legs of the horseshoe, substantially as set forth.
2. The combination of the ease and dia`- phragm of a receiving-telephone with a horseshoe-magnet having one coil around its polar extremities and another wound over the bend and longitudinally of the legs of the horseshoe, 55
substantially as described.
3. rEhe combination of the ease and diaphragm of a receiving-telephone with a horseshoe-magnet having one coil wound around its polar extremities and another wound over the 6o
Publications (1)
Publication Number | Publication Date |
---|---|
US303809A true US303809A (en) | 1884-08-19 |
Family
ID=2372980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US303809D Expired - Lifetime US303809A (en) | Telephone |
Country Status (1)
Country | Link |
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US (1) | US303809A (en) |
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0
- US US303809D patent/US303809A/en not_active Expired - Lifetime
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