US421852A - Thermostat - Google Patents
Thermostat Download PDFInfo
- Publication number
- US421852A US421852A US421852DA US421852A US 421852 A US421852 A US 421852A US 421852D A US421852D A US 421852DA US 421852 A US421852 A US 421852A
- Authority
- US
- United States
- Prior art keywords
- pieces
- piece
- circuit
- cylinder
- thermostat
- 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
- 229910000679 solder Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
- H01H37/765—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode
Definitions
- the invention relates to the class of devices in which the application of heat operates an electric circuit for alarm or similar purposes.
- FIG. 1 is an elevation of the device.
- Fig. 2 is a longitudinal section thereof, and
- Fig. 3 a transverse section across the line 3 3 of Fig. 2.
- the instrument consists of two similar end pieces a a, which screw upon the central portion I).
- the end pieces a a are cylinders of metal or a conducting substance, while the central portion b is formed, preferably, of rubber and serves to insulate the two sections a a from each other.
- the screws 8 8 pass through the ends of the cylinder, and upon the enlarged head 3 of each, inside the cylinder, is firmly attached the flat piece of metal h.
- To this piece h another pieceiis attached by a solder which fuses at a low temperature.
- a spring a is coiled within each end of the-instrument, one end of the spring resting against the inner end of the cylinder, and the other end 1), being curved outward, as shown, is hooked into the piece 1'.
- the spring a is compressed and the tendency is to separate the pieces h tion and serves to make a firm connection of the wires w with each end of the device.
- Fixed to each end of the insulating central piece I) are the concave metallic pieces 0, and from each of these end pieces 0 the narrow strips (1 extend to the outside of the cylinder, and are arranged so as to make contact with the end pieces a a when the latter are screwed to their places upon the central piece I), the connection from c at one end of bbeing made with the end piece a, which is on the opposite end of b.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Fuses (AREA)
Description
(NO Mod l.)
No. 421,852. Patented Feb. 18, 1890.
mm 67M. 7 W QM n nun mw mw, WM c4 UNITED STATES PATENT OFFICE.
GEORGE F. BULEN, OF TOMPKINSVILLE, NEW YORK.
T'H ERMOSTAT.
SPECIFICATION forming part of Letters Patent No. 421,852, dated February 18, 1890.
Application filed June 18, 1889. Serial No. 314,687. (No model.)
To all whom it may concern:
Be it known that I, GEORGE F. BULEN, a citizen of the United States, residing in Tompkinsville, in the county of Richmond and State of New York, have invented certain new and useful Improvements in Thermal CilGllli'rOlOSGlS, of which the following is a specification.
The invention relates to the class of devices in which the application of heat operates an electric circuit for alarm or similar purposes.
The invention will be readily understood by inspection of the accompanying drawings, in which- Figure 1 is an elevation of the device. Fig. 2 is a longitudinal section thereof, and Fig. 3 a transverse section across the line 3 3 of Fig. 2.
The instrument consists of two similar end pieces a a, which screw upon the central portion I). The end pieces a a are cylinders of metal or a conducting substance, while the central portion b is formed, preferably, of rubber and serves to insulate the two sections a a from each other. The screws 8 8 pass through the ends of the cylinder, and upon the enlarged head 3 of each, inside the cylinder, is firmly attached the flat piece of metal h. To this piece h another pieceiis attached by a solder which fuses at a low temperature. A spring a is coiled within each end of the-instrument, one end of the spring resting against the inner end of the cylinder, and the other end 1), being curved outward, as shown, is hooked into the piece 1'. In making this connection the spring a is compressed and the tendency is to separate the pieces h tion and serves to make a firm connection of the wires w with each end of the device. Fixed to each end of the insulating central piece I) are the concave metallic pieces 0, and from each of these end pieces 0 the narrow strips (1 extend to the outside of the cylinder, and are arranged so as to make contact with the end pieces a a when the latter are screwed to their places upon the central piece I), the connection from c at one end of bbeing made with the end piece a, which is on the opposite end of b. The instrument being connected in circuit by means of the Wires w, then, in the event of fire occurring near it, causing sufiicient heat to melt the fusible solder which connects the pieces h and i, the springs, one or both of them, will be released, and will cause the ends o to strike against the concave pieces 0, and the circuit is at once established between the two ends of the circuit-closer. Any alarm or other apparatus in the circuit will of course be set in operation.
I claim as my invention The combination of the parts a a and b, the springs u, the conductors passing through I), and the pieces h i, joined by solder fusible at a low temperature.
In testimony whereof I have hereunto subscribed my name this 14m day of June, A. D. 1889.
GEO. F. BULEN.
Witnesses:
DANL. W. EDGECOMB, CAROLINE E. DAvInsoN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US421852A true US421852A (en) | 1890-02-18 |
Family
ID=2490770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US421852D Expired - Lifetime US421852A (en) | Thermostat |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US421852A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2458483A (en) * | 1946-05-17 | 1949-01-04 | Howard E Tatel | Centrifugal safety delay switch |
| US2599441A (en) * | 1947-10-14 | 1952-06-03 | Ekman Olof Ingemar Harald | Thermocontact or fuse for alarm purposes |
-
0
- US US421852D patent/US421852A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2458483A (en) * | 1946-05-17 | 1949-01-04 | Howard E Tatel | Centrifugal safety delay switch |
| US2599441A (en) * | 1947-10-14 | 1952-06-03 | Ekman Olof Ingemar Harald | Thermocontact or fuse for alarm purposes |
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