US296676A - Half to e - Google Patents
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- Publication number
- US296676A US296676A US296676DA US296676A US 296676 A US296676 A US 296676A US 296676D A US296676D A US 296676DA US 296676 A US296676 A US 296676A
- Authority
- US
- United States
- Prior art keywords
- gelatine
- diaphragm
- contact
- block
- hardened
- 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
- 229920000159 gelatin Polymers 0.000 description 34
- 235000019322 gelatine Nutrition 0.000 description 34
- 239000001828 Gelatine Substances 0.000 description 32
- 210000000188 Diaphragm Anatomy 0.000 description 24
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- KRVSOGSZCMJSLX-UHFFFAOYSA-L Chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N D-Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N D-sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 229960004793 Sucrose Drugs 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 235000001727 glucose Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- -1 parchment Substances 0.000 description 2
- 230000001702 transmitter Effects 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N β-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Definitions
- My invention has reference to telephonetransmittcrs; and it consists in a flexible dia phragm, preferably of hardened gelatine, provided with a contact-point, and combined with a contact-block of prepared gelatine, and in details of construction fully set forth in the following specification and shown in the ac- I 5 companying drawing, which forms part thereof.
- the object of my invention is to provide a transmitting-telephone with an extremelysensitive contact mechanism and diaphragm, whereby the tension of the current may be more efi'ectually varied and articulation be more perfect.
- A is the frame.
- a conical conducting-piece 0, preferably of copper, the point of which extends from the diaphragm B.
- D is a block or piece of gelatine, preferably what is known as high-temperature gela-
- the hardened gelatine diaphragm may be prepared by.
- This 'gclatine block D is secured upon the vertical metal support E, connected by wire 13 to one pole of the primary wire of the usual induction-coil, G.
- wire'F connects the other pole of the primary wire with the contact-piece C.
- H is the local battery
- I is the line through the secondary wire of the inductioncoil.
- both the contacts C and D may be made of gelatinc.
- the operation is as follows:
- the diaphragm B is vibrated in accordance with the articulation. This causes the conical point C to enter more or less into the soft gelatine block D, causing varying amounts of surface to come into contact with the gelatine, and also varying its distance from the metal support E, thereby varying the resistance in the local circuit. Owing to the peculiar properties of gelatine when in this condition, the varying resistance is greatly amplified over that when carbon contacts are used, thus producing more clear and louder articulations in the receiver than is possible with carbon transmitters.
- a case, J may be placed around the gelatine contact to preserve it from too sudden variations in the temperature of the atmosphere, dust, &c.
- a tclephonetransmitter having a con tact-block made of gelatine prepared with glyccrine or its described equivalent, substantially as described.
- a telephone-transmitter provided with a diaphragm made of gelatine, substantially as described.
- gelatine diaphragm B prepared gelatine block D, substantially as described, metal support 10 E, and case J.
Description
(No Model.)
S. GHADWIGK. TELEPHONBIRANSMITTER.
,676. Patented A r. 8, 1884.
u. PC1605. PmlvLilhnmpMr. wiihlflg mc.
mien.
ArnNr SAGER- GHADW'IGK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGXOB OF ONE- HALF TO E. V. MAQHETTE, OF SAME PLACE.
TELEPHONE-TRANSMITTER.
SPECIFICATION forming part of Letters Patent No. 296,676, dated April 8. 1884.
Application filed June 9, 1883. (No model.)
To all whom it may concern:
Be'it known that I, SAGER CHADWICK, of the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have in- 5 vented an Improvement in Telephone-Transmitters, of which the following is a specification.
My invention has reference to telephonetransmittcrs; and it consists in a flexible dia phragm, preferably of hardened gelatine, provided with a contact-point, and combined with a contact-block of prepared gelatine, and in details of construction fully set forth in the following specification and shown in the ac- I 5 companying drawing, which forms part thereof.
The object of my invention is to provide a transmitting-telephone with an extremelysensitive contact mechanism and diaphragm, whereby the tension of the current may be more efi'ectually varied and articulation be more perfect.
In the drawing is shown a sectional elevation of my improved telephone-transmitter.
A is the frame.
B is the diaphragm, which may be made of metal, parchment, gelatine, preferably hardened, or any flexible material. Gelatine, being the most sensitive, is preferred.
dissolving gelatin e and treating it with ch romic acid or any of the chromates, and exposing the preparation, after being run into thin sheets, to light. Any desired thickness may thus be had, and to make the diaphragm more sensitive it maybe placed upon the transmitterframe while still somewhat moist or pliable, and, after being clamped thereon, allowed to dry, when it becomes extremelytight. Parchment, being nothing more than one form of gelatine, may be treated with chromic acid or the chromates and hardened in the same mannor as above specified; hence my invention also comprehends hardened parchment under the term hardened gelatine.
To the center of the diaphragm I secure a conical conducting-piece, 0, preferably of copper, the point of which extends from the diaphragm B.
D is a block or piece of gelatine, preferably what is known as high-temperature gela- The hardened gelatine diaphragm may be prepared by.
tine, and which is a hard quality of same mixed with glycerine, molasses, glucose, canesugar, or their equivalent, to form what is substantially similar to printers rollers, the glycerine therein keeping it in a moist condition, and while moist it is a comparatively good conductor of electricity. This 'gclatine block D is secured upon the vertical metal support E, connected by wire 13 to one pole of the primary wire of the usual induction-coil, G. The
wire'F connects the other pole of the primary wire with the contact-piece C.
H is the local battery, and I is the line through the secondary wire of the inductioncoil. If desired, both the contacts C and D may be made of gelatinc.
The operation is as follows: The diaphragm B is vibrated in accordance with the articulation. This causes the conical point C to enter more or less into the soft gelatine block D, causing varying amounts of surface to come into contact with the gelatine, and also varying its distance from the metal support E, thereby varying the resistance in the local circuit. Owing to the peculiar properties of gelatine when in this condition, the varying resistance is greatly amplified over that when carbon contacts are used, thus producing more clear and louder articulations in the receiver than is possible with carbon transmitters.
If desired, a case, J, may be placed around the gelatine contact to preserve it from too sudden variations in the temperature of the atmosphere, dust, &c.
I do not limit myself to the exact construction shown, as it may be modified without departing from my invention.
Having now described myinvention, what I claim as new, and desire to secure by Letters Patent, is-- l. A tclephonetransmitter having a con tact-block made of gelatine prepared with glyccrine or its described equivalent, substantially as described.
2. The combination of diaphragm B, coni- 5 cal contact 0, gelatinous composition block D, substantially as described, and metal support E, substantially as and for the purpose specified.
3. The combination of diaphragm B, conical contact 0, gelatinous composition block D, substantially as described, metal support E, and case J, substantially as and for the purpose specified.
4. A telephone-transmitter provided with a diaphragm made of gelatine, substantially as described.
5. The combination of gelatine diaphragm B, oontactpoint 0, prepared gelatine block D, substantially as described, metal support 10 E, and case J.
In testimony of which invention I hereunto set my hand.
SAGER CHADWVIGK.
Witnesses:
R. M. HUNTER, FRANCIS S. BROWN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US296676A true US296676A (en) | 1884-04-08 |
Family
ID=2365862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US296676D Expired - Lifetime US296676A (en) | Half to e |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US296676A (en) |
-
0
- US US296676D patent/US296676A/en not_active Expired - Lifetime
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