US150566A - Improvement in thermostats and thermostatic alarms - Google Patents
Improvement in thermostats and thermostatic alarms Download PDFInfo
- Publication number
- US150566A US150566A US150566DA US150566A US 150566 A US150566 A US 150566A US 150566D A US150566D A US 150566DA US 150566 A US150566 A US 150566A
- Authority
- US
- United States
- Prior art keywords
- thermostats
- thermostatic
- alarms
- rubber
- expansion
- 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
- 229920001971 elastomer Polymers 0.000 description 22
- 239000005060 rubber Substances 0.000 description 22
- 239000002184 metal Substances 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000007787 solid Substances 0.000 description 18
- 210000001699 lower leg Anatomy 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 240000002027 Ficus elastica Species 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc 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
Definitions
- My invention relates to that class of thermostats wherein the expansion of a body caused by heat is utilized to give an automatic indication or alarm whenever the heat shall rise'to some determinate degree; and it consists, primarily, in constructing the thermal bars so that they shall act directly on alarm or indicating devices by lineal expansion; and, further, in making the thermal bar of india-rubber or some other equivalent nonmetalic solid element, the term solid bein gused in contradistinetion to liquid; and, further,
- Figure l is a plan view of a device embodying my invention
- Fig. 2 an end view of O and the index pointer
- A is the thermal or expansive bar, having the screw-thread extremity a taking into the screw-thread bracket or support (1 projecting from the base D thereof.
- the smooth prolongation b capable of sliding easily through the support or bracket 0 of the base piece E, the outer end of b passing through c and retaining the lever c, pivoted as shown.
- the outer end of this lever 12 takes under the short arm r of a bent lever, Upon the end of the long arm of lever 0 is a stop, 0, bent upward- 1y at right angles, holding a trigger or detent, g, in the position shown.
- a spring, h the lever f is caused to normally assume the posi tion shown in full lines in Fig. 1, while, by spring 19, the trigger g is caused to take ,the position shown in dotted lines whenever the stop 0 is withdrawn from it.
- this index may be varied; for instance, the degree may be marked on the bar and an index-finger attached to the base, and vice versa.
- Fig. 4 shows one plan of doing this, wherein the lever f, pivoted with a pointer, sweeps over the graduated scale S, indicating the temperature.
- levers may be arranged on the same or different pivots, to be acted on by the same thermal bars, one to re lease the mechanism and the other to mark the temperature.
- the thermal bars I use are made of solid or hollow cylinders, arranged to act directly by lineal expansion. I find this form preferable to those formed of metals having different rates of expansion, and acting by a curving consequent on such different degrees of expansion. These bars may be of one metal, or several metals may be used, the sections being joined end to end, as in Fi 4, where A may be copper, or zinc, or rubber, as hereafter set forth, or one section, y, maybe one metal, and 2 another, or y or 2 rubber, and the other a metal.
- Fig. 1 the thermal bar is shown solid. Where a very quick result is desired I prefer to make them hollow, with apertures bored through, as shown in Fig. 3, allowing the heat full play upon both the interior and exterior of the bar.
- These forms are used with either the rubber or metal, or the combined rubber and metal or the compound metal forms.
- FIG. 5 Another method of using rubber in this con nection is shown in Fig. 5, in which 1" and a. are strips of any suitable metal and rubber, firmly riveted or otherwise fastened together, and attached to an insulating-block, I), c being a contact-point having dial or index at (2,
- a thermostat having its expansible or heat-indicatin g portion, or a part thereof, made of rubber or other non-metallic solid, substantially as set forth.
- a thermostat having its cxpansible or heat-indicating part made of a bar or tube, acting directly by lineal expansion on the alarm or indicating apparatus, substantially as set forth.
- thermostat having its cxpansible or heat-indicating portion, or part thereof, made of rubber or other non-nictallic solid with an electrical circuit, substantiall y as set forth.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Thermally Actuated Switches (AREA)
Description
2 Sheets-Sheet 1.
1. H. GUEST. Thermostats and Thermostatic-Alarms.
Patented May 5.1874.
WITNESSES? I INVENTUFL 2 Sheets--Sheet 2.
.I. H. GUEST. Thermostats and Thermostatic-Alarms.
Patented May 5,1874.
I N VE NTU FL I I t l WITNESSES:
f, pivoted as shown.
UNITED STATES PATENT OFFICE.
JOHN H. GUEST, OF BROOKLYN, NEIV YORK.
IMPROVEMENT IN THERMOSTATS AND THERMOSTATIC ALARMS.
Specification forming part of Letters Patent No. 150,566, dated May 5,1874; application filed March 14, 1874.
To all whom it may concern:
Be it known that I, J OIIN II. GUEST, of the city of Brooklyn, Kings county, State of New York, have invented certain new and useful Improvements in Thermostats and ThermostaticAlarms, of which the following is a specilication:
My invention relates to that class of thermostats wherein the expansion of a body caused by heat is utilized to give an automatic indication or alarm whenever the heat shall rise'to some determinate degree; and it consists, primarily, in constructing the thermal bars so that they shall act directly on alarm or indicating devices by lineal expansion; and, further, in making the thermal bar of india-rubber or some other equivalent nonmetalic solid element, the term solid bein gused in contradistinetion to liquid; and, further,
in the devices and combinations more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part of this specification.
In the drawings, Figure l is a plan view of a device embodying my invention; Fig. 2, an end view of O and the index pointer; and Fig.
a modification of the thermal bar A.
A is the thermal or expansive bar, having the screw-thread extremity a taking into the screw-thread bracket or support (1 projecting from the base D thereof. At its other end is the smooth prolongation b, capable of sliding easily through the support or bracket 0 of the base piece E, the outer end of b passing through c and retaining the lever c, pivoted as shown. The outer end of this lever 12 takes under the short arm r of a bent lever, Upon the end of the long arm of lever 0 is a stop, 0, bent upward- 1y at right angles, holding a trigger or detent, g, in the position shown. By a spring, h, the lever f is caused to normally assume the posi tion shown in full lines in Fig. 1, while, by spring 19, the trigger g is caused to take ,the position shown in dotted lines whenever the stop 0 is withdrawn from it.
From this description the operation of the thermal bar upon the trigger g is easily seenviz., that whenever lineal expansion takes place in the thermal bar A, its upper end being rigidly fixed to D by the scr'ewthreaded shank a and support d, such expansion acts directly springs form the terminals of a battery-circuit, as represented by the wires P N, in which circuit is placed any suitable electric apparatus.
As all these methods of application are within the skill of any one versed in the art, I have not herein elaborated them, nor do I confine myself to them in the practical application of my invention.
Upon the end of the thermal bar is fixed a graduated dial or disk, 0; and upon the end of any suitable base, 13, upon which the parts are secured, is fixed a pivot, 0. Upon revolving O the thermal bar A is revolved, and by means of the screw-threaded shank a the end I) is forced farther in or partially withdrawn through b, thus taking a greater or less degree of expansion to operate the levers e and f. The graduations are marked on O, so that by turning it till any particular graduation is under index 0, the apparatus is set to go oii' when the temperature of the air surrounding the apparatus reaches such degree.
It is evident that the form of this index may be varied; for instance, the degree may be marked on the bar and an index-finger attached to the base, and vice versa.
I propose to use this thermostat also as a thermometer, either separately or in connection with the alarm-giving devices shown in Fig. 1. Fig. 4 shows one plan of doing this, wherein the lever f, pivoted with a pointer, sweeps over the graduated scale S, indicating the temperature.
It is evident that two levers may be arranged on the same or different pivots, to be acted on by the same thermal bars, one to re lease the mechanism and the other to mark the temperature.
The thermal bars I use are made of solid or hollow cylinders, arranged to act directly by lineal expansion. I find this form preferable to those formed of metals having different rates of expansion, and acting by a curving consequent on such different degrees of expansion. These bars may be of one metal, or several metals may be used, the sections being joined end to end, as in Fi 4, where A may be copper, or zinc, or rubber, as hereafter set forth, or one section, y, maybe one metal, and 2 another, or y or 2 rubber, and the other a metal.
I have discovered that excellent results may be obtained by the use of rubber or other nonmetallic solid in this connection. I find rubber to be very susceptible to changes in temperature, and that its rate of expansion and contraction for the same degrees is constant, no matter how often used. These are points of great utility, and I believe I am the first to ever utilize this class of solids for thermostatic alarms, it having been hitherto considered that metallic substances were indispensable therefor.
In Fig. 1 the thermal bar is shown solid. Where a very quick result is desired I prefer to make them hollow, with apertures bored through, as shown in Fig. 3, allowing the heat full play upon both the interior and exterior of the bar. These forms are used with either the rubber or metal, or the combined rubber and metal or the compound metal forms.
Another method of using rubber in this con nection is shown in Fig. 5, in which 1" and a. are strips of any suitable metal and rubber, firmly riveted or otherwise fastened together, and attached to an insulating-block, I), c being a contact-point having dial or index at (2,
(1 being the pointer fastened to base. This shows the thermostat arranged for an open circuit, the terminals of the battery-circuit. being represented by the wires 1 and N for a closed circuit. The contact and dial screw and terminals are arranged as shown by c" c and N in dotted lines.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-
1. A thermostat having its expansible or heat-indicatin g portion, or a part thereof, made of rubber or other non-metallic solid, substantially as set forth.
2. A thermostat having its cxpansible or heat-indicating part made of a bar or tube, acting directly by lineal expansion on the alarm or indicating apparatus, substantially as set forth.
3. The combination of a thermostat, having its cxpansible or heat-indicating portion, or part thereof, made of rubber or other non-nictallic solid with an electrical circuit, substantiall y as set forth.
4. The combination of a thermostat having its expansible portion, or part thereof, made of rubber or other non-metallic solid, with devices indicating the temperature, substantial 1y as set forth.
5. The combination, with a detent or circuitcontrolling device, of a thermostat composed of a bar or tube of one homogenous metal, acting directly thereon by lineal expansion, substantially as set forth.
J. H. GUEST.
Witnesses:
J. Fisx, T. U. (loNNoLLY.
Publications (1)
Publication Number | Publication Date |
---|---|
US150566A true US150566A (en) | 1874-05-05 |
Family
ID=2219979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US150566D Expired - Lifetime US150566A (en) | Improvement in thermostats and thermostatic alarms |
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US (1) | US150566A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3002386A (en) * | 1957-10-29 | 1961-10-03 | Texas Instruments Inc | Thermostats |
US3117449A (en) * | 1962-01-22 | 1964-01-14 | G V Controls Inc | Thermally responsive element |
US4823861A (en) * | 1988-09-06 | 1989-04-25 | The Babcock & Wilcox Company | Fire detection device for regenerative air heater |
-
0
- US US150566D patent/US150566A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3002386A (en) * | 1957-10-29 | 1961-10-03 | Texas Instruments Inc | Thermostats |
US3117449A (en) * | 1962-01-22 | 1964-01-14 | G V Controls Inc | Thermally responsive element |
US4823861A (en) * | 1988-09-06 | 1989-04-25 | The Babcock & Wilcox Company | Fire detection device for regenerative air heater |
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