US499646A - Switch - Google Patents

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US499646A
US499646A US499646DA US499646A US 499646 A US499646 A US 499646A US 499646D A US499646D A US 499646DA US 499646 A US499646 A US 499646A
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lever
switch
wire
circuit
contact
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches 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
    • H01H19/001Thumb wheel switches
    • H01H19/003Thumb wheel switches having a pushbutton actuator

Description

(N0 Mod l) a mmm H. 51" I V I'M RUSSELL, Jr.
ITC
Patented June 13,1893.
ATTO Y UNITED STATES PATENT OFFICE.
GEORGE WVILLIAM RUSSELL, JR, OF DENVER, COLORADO.
SWITCH.
SPECIFICATION forming part of Letters Patent No. 499,646, dated June 13, 1893. Application filed April 7 1893. Serial No. 469,488. (No model.)
To all whom it may concern.-
Be it known that I, GEORGE WILLIAM Rus- SELL, J r., a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Circuit-Switches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.
My invention relates to improvements in circuit switches and the object of the improvement is to provideadevice of this class which shall be simple in construction,economical in cost, reliable, durable and efficient in use.
To this end my improved electrical switch consists of the features, arrangements and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings in which is illustrated an embodiment thereof.
In the drawings, Figure l is a front elevation of the device in detail. Fig. 2 is a side elevation of the same. Fig. 3 is a section taken on the line -x-x, Fig. 2. Fig. 4 is an underneath View of the mechanism. Fig. 5 is a diagrammatic view illustrating two switches in circuit.
For the purposes of this specification, I shall assume that the device occupies an upright or vertical position, the top of which is toward the top of the sheet of drawings. This assumption, however, is only for convenience of description, as the operation of the mechanism is equally effective in whatever position it may be placed.
Similar reference characters indicating corresponding parts or elements of the mechanism in the several views, let the numeral 5 designate a suitable supporting plate, to the top of which is attachedadoubl'e hanger composed of two parts 6, to whichis pivoted the lever 7 composed of some material forming good conductor for the electrical current. This rocking lever is operated by means of push buttons 8 which pass through suitable apertures formed in the top of the supporting plate. These buttons are connected with the lever by means of links 9 which are pivoted to the lever at points 12' on either side of its fulcrum 10; the opposite extremities of the links are pivoted to the buttons as shown at 13. The lever 7 is preferably double, its two parts being connected at either extremity as shown at7. At a point on the lever located on a vertical line with its fulcrum when the lever is in a horizontal position, is attached one extremity of a coil-spring 14 which is always under tension. The spring is preferably double as shown in Fig. 2, the connection between its two parts being passed under a pin 15 located between, and connecting the two parts of the lever, the upper extremities of the spring being attached to the top of the su pportin g plate.
To the inner surface of the supporting plate or casing 5 are attached three contacts, 16, 16 and 17, connected with the binding posts 18, 1S and 19, whose extremities project through the casing 5. The contact 17 is centrally located and is always in engagement with the rocking lever, while the two contacts 16 are alternately in engagement therewith.
This switch is specially designed for use in an incandescent lamp circuit and is so illustrated in Fig. 5. When it is desired to control the same lamp or lamps from two distinct and separate points, as from two compartments of a building, the three contacts 16, 16 and 17 are employed as shown in Fig. 5. When, however, it is desired to control the lamp or lamps from but one point, only one of the contacts 16 is essential, as will be readily understood.
The circuit illustrated in Fig. 5 will now be described. Let the numerals 20 and 21 designate the main circuit conductors. From conductor 21 leads a branch wire 22 to the lamp 23, which is connected with the contact 17 of one switch A by means of a wire 24, while the contact 17 of the other switch B is connected with the main conductor 21 by a wire 25. The two contacts 16 farther to the left in the two switches are connected by a wire 26, while the other two contacts 16 are connected by a wire 27. Assuming that the rocking levers are in the position shown in full lines in Fig. 5, the electric current may be said to pass from main cond uctor20 through wire 22 to the lamp, and thence through wire 24 to contact 17 of switch A, and thence through the lever 7 to contact 16, and thence ma, wire 26 to one contact 16 of the switch 13, thence through the rocking lever to contact 17 and to the other main conductor 21 through medium of wire 25. In this case the lamp circuit is closed. Again if the two levers of switches A and B are both in the dotted line position,the path of the current may be said to be from main Wire 20 through branch wire 22 to the lamp, and thence through wire 24: to contact 17 of switch A,through lever 7 to contact l6, and thence through wire 27 to the corresponding contact 16 of switch B, and thence through the lever to contact 17 and to the other main conductor 21 via wire 26. It will thus be seen that when the circuitis closed, the two levers must be in corresponding positions. However, when it is desired to extinguish the lamp it is only necessary to reverse the position of either lever. For instance, if the lever of switch A is in the dotted line position, and the lever of switch B is in the full line position, I find the circuit is broken between lever '7 of switch B and the contact 16 farther to the right. Again, if the lever of switch A is in the full line position and that of switch 13 in the dotted line position, there is a break in the circuit between the lever of switch A and the contact 16 farther to the right of the same switch.
It will be readily seen that if it is desired to control the lamp from but one point, but one switch will be necessary. if I dispense with switch 13, the light may be controlled from switch A alone, and only one wire 26 or 27 will be employed and this wire will lead directly from the corresponding contact 16 to the main circuit wire 21.
Having thus described my invention, what I claim is For instance,
1. In a circuit switch, the combination of a rocking lever suitably su pported, a coil-spring attached to the support at one extremity above the fulcrum of the lever, and at the other extremity to the lever below the fulcrum and three contacts, one of which is always in engagement with the lever, while the other two are alternately in contact, therewith substantially as described.
2. In a circuit switch, the combination of a rocking lever, a coil-spring attached at one extremity to a stationary support above the lever fulcrum, and at the other extremity to the lever at a point below the fulcrum and two contacts, one in continuous engagement with the lever, and the other in disengagement or engagement therewith, according as the circuit is closed or broken, substantially as described.
3. In a circuit switch, the combination with the circuit of a rocking lever, a double coilspring having its extremities attached to a stationary support above the lever fulcrum and its center attached to the lever below the fulcrum, and suitable contacts, substantially as described.
4. In a circuit switch, the combination with the circuit, of a rocking lever, a coil-spring attached at one extremity to a stationary support, and at its opposite extremity to the lever at a point below the fulcrum, the two points of attachment for the spring lying in the same vertical line with the fulcrum of the lever, and suitable contacts, substantially as described.
In testimony whereof I affix my signature in the presence of two witnesses.
, GEORGE WILLIAM RUSSELL, JR. W'itnesses:
J. B. WILLSEA,
CHAS. E. DAWSON.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972664A (en) * 1959-06-08 1961-02-21 Furnas Electric Co Manual motor starter with overload protection
US20030212835A1 (en) * 2002-02-25 2003-11-13 General Electric Company Method and system for external clock to obtain multiple synchronized redundant computers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972664A (en) * 1959-06-08 1961-02-21 Furnas Electric Co Manual motor starter with overload protection
US20030212835A1 (en) * 2002-02-25 2003-11-13 General Electric Company Method and system for external clock to obtain multiple synchronized redundant computers

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