US1389242A - Thermic telephone-transmitter - Google Patents
Thermic telephone-transmitter Download PDFInfo
- Publication number
- US1389242A US1389242A US81235A US8123516A US1389242A US 1389242 A US1389242 A US 1389242A US 81235 A US81235 A US 81235A US 8123516 A US8123516 A US 8123516A US 1389242 A US1389242 A US 1389242A
- Authority
- US
- United States
- Prior art keywords
- transmitter
- box
- heating conductors
- sounding box
- thermic
- 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
- 239000004020 conductor Substances 0.000 description 28
- 238000010438 heat treatment Methods 0.000 description 22
- 238000010276 construction Methods 0.000 description 3
- 101000635799 Homo sapiens Run domain Beclin-1-interacting and cysteine-rich domain-containing protein Proteins 0.000 description 1
- 102100030852 Run domain Beclin-1-interacting and cysteine-rich domain-containing protein Human genes 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010255 response to auditory stimulus Effects 0.000 description 1
- 230000001702 transmitter Effects 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
Definitions
- Our invention relates to improvements in thermic telephones, and its object is to provide a transmitting instrument which, as compared with the contact microphones hitherto in use, has the advantages of being able to stand greater quantities of energy, and of lasting for an almost unlimited time.
- Two constructions of the thermic transmitter are illustrated by way of example in I the accompanying drawing, Figures 1 and 2 showing the respective constructions in I vertical section.
- the transmitter illustrated in Fig; 1 comprises two cup-like bodies 1 and 2 connected together to form a sounding box andsecured by screws 3 and 1 to a bolt 5.
- the bolt 5 also serves for securing the support 6 of the heating conductors 7, which may be of any suitable form and connected in any suitable manner.
- the free edges of the bodies 1 and 2 are arranged so as to leave an annular slot 10 between them. Through the said slot 10, and through openings 11 provided in the body 1, the sound can penetrate from the outside into the sounding box formed by the bodies 1 and 2, and act on the heating conductors '7 in said box.
- the heating conductors which may be in series, parallel or mixed connection, are connected to the current conductors or line wires 12, 13.
- a closed casing might be provided for the heating conductors, and a portion of the wall of said casing might be in the form of a diaphragm for transmitting the sound.
- a construction might be as shown in Fig. 2, wherethe parts 2, 3,4, 5, 6, 7, 8, 9, 12, and l3'are exactly the same as in Fig.
- the member 1 of the casing or box is not spaced at the edge from the member or cup 2, neither is such member 1 perforated, but it is made to form a closed box with the member 2, and is made of flexible material to constitute a diaphragm which will vibrate in response to sound waves and thus admit or transmit such sound waves to the interior of the transmit ter box, so that they will impinge upon the heating conductors 7.
- said sounding box being formed of two cupshaped bodies, means for securing together said cup-shaped bodies, said means being adapted to carry thesupport for said heating conductors.
- a sounding box in a thermic telephone transmitter, 01 a sounding box,heating conductors in said sounding box, a support for said heating conductors in said sounding box, means for supplying current to said heating conductors, and means for admitting sound into said sounding box, said sounding box being formed of two cupshaped bodies, a bolt for securing together said cup-shaped bodies, insulating sleeves on said bolt adapted to engage on either side the support for said heating conductors, and means for exerting axial pressure on said cup-shaped bodies, said insulating sleeves and said support.
- a sound transmitter comprising a box constructed to admit sound waves to its interior, a conductor located within said box and exposed to the impinging action of the sound waves, andadapted to have its resistance fluctuate as the sound waves impinge upon it, and line wires for supplying electric current to said conductor.
- V 9. 1i thermic telephone transmitter comprising a casing permeable to sound waves, thermic conductors located in said casing and exposed and responsive to said sound waves for altering the current flow therein, and means for connecting said vconduetors with an electric line circuit.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Catching Or Destruction (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Building Environments (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE191505838X | 1915-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1389242A true US1389242A (en) | 1921-08-30 |
Family
ID=32668494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US81235A Expired - Lifetime US1389242A (en) | 1915-02-11 | 1916-02-29 | Thermic telephone-transmitter |
Country Status (5)
Country | Link |
---|---|
US (1) | US1389242A (fr) |
AT (1) | AT76294B (fr) |
DK (1) | DK21413C (fr) |
FR (1) | FR480858A (fr) |
GB (2) | GB191505838A (fr) |
-
0
- DK DK21413D patent/DK21413C/da active
-
1915
- 1915-04-19 GB GB191505838D patent/GB191505838A/en not_active Expired
- 1915-04-19 GB GB191505837D patent/GB191505837A/en not_active Expired
-
1916
- 1916-01-24 AT AT76294D patent/AT76294B/de active
- 1916-02-04 FR FR480858A patent/FR480858A/fr not_active Expired
- 1916-02-29 US US81235A patent/US1389242A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AT76294B (de) | 1919-04-25 |
GB191505838A (en) | 1916-04-19 |
DK21413C (da) | 1916-08-07 |
GB191505837A (en) | 1916-04-19 |
FR480858A (fr) | 1916-10-04 |
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