US518231A - Electric switch - Google Patents
Electric switch Download PDFInfo
- Publication number
- US518231A US518231A US518231DA US518231A US 518231 A US518231 A US 518231A US 518231D A US518231D A US 518231DA US 518231 A US518231 A US 518231A
- Authority
- US
- United States
- Prior art keywords
- box
- switch
- electric switch
- contacts
- circuit
- 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
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/62—Contacts actuated by radial cams
Definitions
- -My invention relates to an electric switch adapted for use in various connections, but
- Fig. 2 is a sectional view through the same.
- B represents a cast iron box of suitable shape, which is normally closed by a coverC secured in place bythumb screws 8 and provided, if desired, with a glass face D.
- an insulating base piece E which may be made of leatheroid or vulcanized fiber, but preferably will be of slate.
- the terminals 19, p which are electrically connected by the fuses f, f 0 to similar plates 19', p to which are attached the local circuit wires 0, d, or in alternating current work the wires leading to the primary of the transformer.
- the main oircuitLwires a, b are attached to 0 the second set of terminals of the switch, seen in Fig.1 at K, K.
- the handle H is formed upon a metal pin or bar M running through the cam and connected with it by a pin t working in a slot t in the cam, and thereby allowing a certain amount of lost motion in order to allow a quick opening-of the circuit at the switch contacts by reason of the resiliency of the contacts themselves, and the action of asupplementary spiral spring W which may be used when desired. Should the fuses become melted the switch is opened, the cover of the box removed and the fuses can then be replaced conveniently and with entire safety.
Landscapes
- Switch Cases, Indication, And Locking (AREA)
- Manufacture Of Switches (AREA)
Description
' A. EKSTROM.
ELECTRIC SWITCH.
Patented Apr. 17, 1894.
WTNEESEE- WASHINGTON, D4 0.
UNITED STATES PATENT OFFICE.
AXEL.EKSTRCM, LYNN, MASSACHUSETTS, ASSIGNOR TO THE THOMSON- HOUSTON ELECTRIC COMPANY, OF CONNECTICUT.
ELECTRIC SWITCH.
SPECIFICATION forming part of Letters Patent No. 518,231, dated April 17, 1894. Application filed December 24, 1890. Serial No. 375,668. (No model.)
To all whom it may concern.-
Be it known that I, AXEL EKsrRoM, a citizen of the United States, residing at Lynn, county of Essex, and State of Massachusetts,
have invented a certain new and useful Improvement in Electric Switches, of which the following is a specification.
-My invention relates to an electric switch adapted for use in various connections, but
designed particularly for alternating current circuits.
It consists of certain details of construction by which the switch contacts are inclosed in a tight box, and the circuit may be quickly broken in such a way as to prevent arcing.
These improvements are illustrated clearly in the accompanying drawings, wherein Figure l is a plan view of the switch and protecting case with the cover removed, and
Fig. 2 is a sectional view through the same.
B represents a cast iron box of suitable shape, which is normally closed by a coverC secured in place bythumb screws 8 and provided, if desired, with a glass face D. In the box is an insulating base piece E which may be made of leatheroid or vulcanized fiber, but preferably will be of slate. Upon this insulating piece are set the terminals 19, p which are electrically connected by the fuses f, f 0 to similar plates 19', p to which are attached the local circuit wires 0, d, or in alternating current work the wires leading to the primary of the transformer. These'local circuit wires, aswell as the main circuit wires a, b 3 5 pass into the box through ports P fitted with insulating gaskets so as to form a tight joint, and guard the wires against becoming electrically connected with the metal of the box. The main oircuitLwires a, b are attached to 0 the second set of terminals of the switch, seen in Fig.1 at K, K. There are two spring contacts Z, Z, one in each limb of the circuit, each of which consists of a number of thin elastic superimposed metal strips, such for.
instance as strips cut from phosphor bronze, or hard drawn copper, and then bent in the manner shown to secure considerable spring action. These contacts are attached at one end to the terminals p, p, and their free ends are adapted to be brought into engagement with the contacts K, K when the local circuit will be closed, as will be readily understood.
To move the switch contacts 1 pivot within the box an insulating cam F which bears against the springs Z, Z, and is thrown back and forth over a dead center by handleH outside the box so that the switch will remain fixed either in its closed or open position.
'The handle H is formed upon a metal pin or bar M running through the cam and connected with it by a pin t working in a slot t in the cam, and thereby allowing a certain amount of lost motion in order to allow a quick opening-of the circuit at the switch contacts by reason of the resiliency of the contacts themselves, and the action of asupplementary spiral spring W which may be used when desired. Should the fuses become melted the switch is opened, the cover of the box removed and the fuses can then be replaced conveniently and with entire safety.
What I claim as new, and desire to secure by Letters Patent, is-
The combination with the closed switch box having the circuit wires led thereinto through insulating gaskets, with the contact springs Z, Z, attached to one set of terminals, and adapted to be thrown into engagement with the second set of terminals,-the cam journaled in the-box,but insulated therefrom, the handle outside the box connected to the cam by a pin and slot connection and a supplement- I ary spring W, assisting in throwing the switch contacts so as to form a quick break of the 5 circuit.
, In witness whereof I have hereto .set my hand this 20th day of December, 1890.
- AXEL EKSTROM.
Witnesses:
JOHN W. GIBBoNEY, M. A. WAKEFIELD.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US518231A true US518231A (en) | 1894-04-17 |
Family
ID=2587032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US518231D Expired - Lifetime US518231A (en) | Electric switch |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US518231A (en) |
-
0
- US US518231D patent/US518231A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US518231A (en) | Electric switch | |
| US992009A (en) | Waterproof switch. | |
| US387732A (en) | Joseph a | |
| US460618A (en) | Electric switch | |
| US1093972A (en) | Wire-connector. | |
| US690364A (en) | Electric switch. | |
| US931911A (en) | Contact device for switches. | |
| US288217A (en) | Contact for electric lamps | |
| US506092A (en) | Electrical switch | |
| US490917A (en) | Switch and safety-fuse | |
| US732201A (en) | Electric controller. | |
| US578643A (en) | Electric cut-out | |
| US1176102A (en) | Means for operating switch mechanism. | |
| US734407A (en) | Circuit-terminal for fuses. | |
| US919473A (en) | Combined switch and cut-out. | |
| US933956A (en) | Electrical switch. | |
| US512774A (en) | Ernest p | |
| US523074A (en) | kestee | |
| US530804A (en) | Genberg | |
| US408678A (en) | Electric switch | |
| US469220A (en) | Island | |
| US765609A (en) | Carbon break-switch. | |
| US599930A (en) | Switch for electric circuits | |
| US698394A (en) | Incandescent-lamp socket. | |
| US877301A (en) | Wall-switch. |