US368596A - Waltee h - Google Patents
Waltee h Download PDFInfo
- Publication number
- US368596A US368596A US368596DA US368596A US 368596 A US368596 A US 368596A US 368596D A US368596D A US 368596DA US 368596 A US368596 A US 368596A
- Authority
- US
- United States
- Prior art keywords
- plates
- resistance
- contact
- lever
- series
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S292/00—Closure fasteners
- Y10S292/20—Window fasteners
Definitions
- My invention consists of a series of metallic plates, preferably of iron or steel, that are placed face to face, so as to rest in contact and give a superficial resistance to the passage of an electric current through the mass.
- I also provide a movable contact device adapted to connect with the plates at any point in the series, so as to make the resistance variable at will.
- Figure 1 is a section of a variable-resistance box on line 1 1 of Fig. 2.
- Fig. 2 is a section on line 2 2 of Fig. 3; and
- Fig. 3 is the same view as Fig. 1,with the resistance-plates all short-circuited.
- E represents a series of thin iron plates, rectangular in shape, and of asize adapted to the quantity of the current passing through. These plates are set on edge in close superficial contact and surrounded by a box, D, of non-conducting non-combustible material, such as soapstone. The sides of the box,
- a metallic jackknife-lever, O is hinged to the bottom of the box at one end, and is connected at its free end to a lever, A, through 3 5 connecting-rod B.
- This lever is raised by lever A from the position shown in Fig. 1 to that shown in Figs. 2 and 3 it comes in contact with the lower edges of the plates E in succession and lifts them slightly from their 0 normal bearing, so that they rest upon it and make electrical connection with it.
- the lever G is connected to one terminal and the end plate of the series to the other terminal of the circuit, so that as the lever 5 passes from one extreme position to the other the plates are gradually brought into or out of the circuit and the resistance varied thereby.
- This resistance is very compact. It cannot be injured by heat, and is easily and rapidly varied to any extent Without sparking at the contact-points.
- I claim-- 1 A variable electrical resistance formed of a series of metallic plates in superficial contact, and a contact device adapted to sweep over the edges of the plates to bring any desired number of them into circuit.
Description
(No Model.)
W. H. KNIGHT.
ELECTRICAL RESISTANCE. No. 368,596. Patented Aug. 23, 1887.
A. o E E I c l v 8858 v E T0 A. I iQw M W) UNITED STATES PATENT OFFICE.
WALTER H. KNIGHT, OF NEW YORK, N. Y.
ELECTRICAL RESISTANCE.
SPECIFICATION forming part of Letters Patent No. 368,596, dated August 23, 1887.
Original application filed March 13, 1886, Serial No. 195,133. Divided and this application filed January 28, 1887. Serial No. 225,824. (N 0 model.)
To all whom it may concern:
Be it known that I, WVALTER H. KNIGHT, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Electrical Resistances, of which'the following is a specification, this application being a division of one filed by me March 13, 1886, and numbered 195,133.
My invention consists of a series of metallic plates, preferably of iron or steel, that are placed face to face, so as to rest in contact and give a superficial resistance to the passage of an electric current through the mass. I also provide a movable contact device adapted to connect with the plates at any point in the series, so as to make the resistance variable at will.
In the accompanying drawings, Figure 1 is a section of a variable-resistance box on line 1 1 of Fig. 2. Fig. 2 is a section on line 2 2 of Fig. 3; and Fig. 3 is the same view as Fig. 1,with the resistance-plates all short-circuited.
In the figures, E represents a series of thin iron plates, rectangular in shape, and of asize adapted to the quantity of the current passing through. These plates are set on edge in close superficial contact and surrounded by a box, D, of non-conducting non-combustible material, such as soapstone. The sides of the box,
as seen in Fig. 2, have narrow pieces on their lower edges, upon which the plates normally rest. A metallic jackknife-lever, O, is hinged to the bottom of the box at one end, and is connected at its free end to a lever, A, through 3 5 connecting-rod B. As this lever is raised by lever A from the position shown in Fig. 1 to that shown in Figs. 2 and 3 it comes in contact with the lower edges of the plates E in succession and lifts them slightly from their 0 normal bearing, so that they rest upon it and make electrical connection with it.
The lever G is connected to one terminal and the end plate of the series to the other terminal of the circuit, so that as the lever 5 passes from one extreme position to the other the plates are gradually brought into or out of the circuit and the resistance varied thereby. This resistance is very compact. It cannot be injured by heat, and is easily and rapidly varied to any extent Without sparking at the contact-points.
I claim-- 1. A variable electrical resistance formed of a series of metallic plates in superficial contact, and a contact device adapted to sweep over the edges of the plates to bring any desired number of them into circuit.
2. In a variable electrical resistance, the combination of the metallic plates E and the 50 manually-operated contact 0, making connection with the edges of the plates.
WALTER H. KNIGHT. lVitnesses:
J OHN J. REID, OSCAR LAPHAM.
Publications (1)
Publication Number | Publication Date |
---|---|
US368596A true US368596A (en) | 1887-08-23 |
Family
ID=2437613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US368596D Expired - Lifetime US368596A (en) | Waltee h |
Country Status (1)
Country | Link |
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US (1) | US368596A (en) |
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0
- US US368596D patent/US368596A/en not_active Expired - Lifetime
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