US2403087A - Electrical apparatus - Google Patents
Electrical apparatus Download PDFInfo
- Publication number
- US2403087A US2403087A US463979A US46397942A US2403087A US 2403087 A US2403087 A US 2403087A US 463979 A US463979 A US 463979A US 46397942 A US46397942 A US 46397942A US 2403087 A US2403087 A US 2403087A
- Authority
- US
- United States
- Prior art keywords
- spring
- springs
- winding
- armature
- arm
- 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
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/012—Automatic controllers electric details of the transmission means
Definitions
- This invention relates to electrical apparatus and, particularly, to the circuit' controlling devices of regulators of the rheostatic type.
- an elongated armature member responsive to a change in an electric quantity is generally used to actuate the contact members.
- the elongated armature member is pivotally mounted on thin leaf springs of one form or the other in order to provide a substantially floating pivot.
- the Spring pvot for the armature member is of the cross-spring type, that is, two thin leaf springs in the horizontal position and two thin leaf springs in the vertical position to form a frictionless pivot along the line of intersection of the cross springs, it is foundthatinV certain applications, the springs bend or buckle and prevent proper operation of the regulator. This is particularly true in applications where the voltage swings to a high value or where ⁇ thee-regulatorfis subjected" to high impact shocks as in navy applications.
- .It is an object of this invention to provide in a regulator a circuit controlling device capable of withstanding physical shock and having a high degree of sensitivity.
- Another object of this invention is to provide in a regulator a circuit controlling device having Substantially balanced forces for obtaining a high degree of sensitivity in the operation thereof.
- Figure 1 is adiagrammatic view illustratingv circuits and apparatus embodying the teachings of this invention
- Fig. 2 is a front elevational'view of a regulator embodying the teachings of this invention
- Fig. 3 is a graph, the curves of which illustrate certain of the forces applied during a movement of the circuit controlling device
- Fig. 4 is a graph, ⁇ the curves of which also illustrate certain of the forces applied during movement of the circuit controlling device
- Fig. 5 is a graph, the curves of which are representative of the sensitivity of the regulator, y
- a circuit controlling device constructed in accordance with this invention is illustrated as disposed for controlling the voltage of a generator I0.
- the generator I0 is provided with an armature winding I2 connected to supply current to circuit conductors I4 and I6 and a shunt field winding I8.
- the shunt iield winding I8 is connected at one end to the armature winding I2, the other end being connected through an adjustable rheostat 20 and a regulator resistor 22 to the other terminal of the armature l2.
- a rheostat controlling element including a plurality of elongated conducting leaf springs 24 arranged in a stack and so mounted at one endl that their Xed ends are insulated from each other and-connectedby conductors 26 to different points along the resistor 22 is disposed for -controlling the number of sections of the resistor which are connected in circuit with the field winding I8.
- the other endsfof the leafsprings 24 carry cooperating contact members (not shown) and are free to move in one direction, being self-biased in the other direction towards the sloped stop 2B of ⁇ insulating material which functions to separate the springs 24 and contact members carried thereby when seated thereagainst.
- a driving member 30 of insulating material is carried by a movable arm 32 and is so disposed to actuate the Springs 24 into progressive engagement to sequentially shunt the sections of resistor 22.
- the movable arm 32 is pivotally mounted by a plurality of cross springs 34 and 36, two of each being provided on the core structure 38 of an electromagnet 40, the armature 42 of which is carried at the lower end of the arm.
- a'bracke 44 is secured to the arm, spaced vertical surfaces being provided thereon for receiving the uppern ends of the spaced vertical springs 36 and spaced horizontal surfaces are provided for receiving one of the ends of the spaced horizontal springs 34.
- a supporting bracket 46 is secured to the core structure 38, as illustrated in Figs. 1 and 2, a part of the bracket being cut away in Fig. l to illustrate the assembly of the component parts.
- the bracket 46 is also provided with spaced horizontal surfaces for receiving one end of the horizontal springs 34 and spaced vertical surfaces for 3 receiving the lower ends of the vertical springs 36.
- the electromagnet 40 having the core member 38 identified hereinbefore is provided with an energizing winding 48, the armature member 42 carried by the movable arm 32 being disposed for movement in the air gap formed in the core member as the energization of the winding'4 ⁇ 8 changes.
- the armature 42 is preferably tapered as illustrated so that as the armature moves in the air gap of the core member 38 in response to an increase in the energization of the winding 48, the width of the armature from top to bottom Within the air gap will increase to effect an increase in the magnetic pull on the armature.
- a main coil .spring 52 is provided having one end secured to the arm 32 and the other end secured to an adjustable bolt 54.
- the adjustable bolt 54 is carried by a bracket 56 which is secured to the core member 38 as illustrated.
- the cross springs 34 and 36 forming the pivot for the arm 32 are made of, relatively heavy material in order to prevent bending or buckling of the springs, they exert. a force which upsets the balance between the Spring forces and magnetic pull required for sensitive operationv of the apparatus.
- the cross springs ⁇ 34 and 36 have a zero bias on the movable arm 32 for some intermediate point between the limits of movement of the arm for the regulatini; ⁇ limits of travel, as illustrated by the curve ⁇ 58 of Fig. 3, but dependent upon the point at which balance is to be maintained.
- the zero bias point is usually selected to be near the open circuit position of the leafv spring assembly.
- curve 62 is illustrative o! the unbalanced condition resulting from the use of the heavy cross springs 34 and 36. It ls evident that with the heavier cross-spring pivot that the slope of the lcomposite forces of the springs represented by curve 62 is quite steep over theregulating limits of travel.
- an auxiliary elongated leaf spring 64 is secured at one of its ends to one side of the movable arm 32 at its lower end by ⁇ any suitable means, such as the bolt 66 and nuts 68.
- a projecting lug l is also provided at the lower end of the erm 32, 'the bolt 66 projecting through the lug 18, the arm 32, and the spring 64 to maintain them integral.
- the lug 'I3 and Spring j64 are provided ⁇ with a slot 132 and T4, respectively, to fit over the bolt 'I6 which is adjustably mounted on a stop 18.
- the stop 18 is secured to the panel 80, as illustrated in Fig. 2, and is disposed to be engaged by the lug 'I0 to limit the movement of the arm 32 in a clockwise direction, as illustrated in the drawing.
- the force of the spring 64 may be varied, it being noted that when the lug 10 is seated ⁇ against the stop 18 and the spring ⁇ 64 is free from the nut on the bolt I6 that the spring 64 has a zero bias, and that when the spring 64 i's seated against the nut on the bolt 'I6 by a movement of the arm 32 in a counterclockwise direction about the cross-spring pivot that the spring 64 has a maximum bias.
- the spring 64 thus opposes the force of the crossspring pivot over the major part of the travel of the movable arm to the circuit closing position.
- FIG. 4 A representation of the eiect of the spring 64 is made in Fig. 4 in which curve 62 represents the combined force of the leaf springs 24 and the cross springs 34 and 36 as the movable arm pivots to actuate the springs 24 from an open circuit position to a circuit closing position.
- Curve 82 is representative of the force of the auxiliary leaf spring 64 over the same distance of travel
- curve 84 is representative of the combined forces of the springs 24, 34, 36, and 64.
- the resultant curve 84 is not as steep as curve 62 with the result that a greater degree of sensitivity in response to a change in the energization o1' coil or winding 48 is effected.
- the winding 48 of the electromagnet 40 is connected across the generator I0, one terminal of the winding 48 being connected by a conductor 86 through an adjustable resistor 88 and conductor 90 to one side of the armature winding I2, and the other terminal of the winding 48 being connected by conductor 92 through the primary Winding 94 of a stabilizing transformer to conductor I6.
- the winding 94 of the stabilizing transformer is inductively coupled to a winding 96 that is connected across the shunt field winding I8 of the generator.
- the forces of the springs cooperate, giving a resultant curve of changing force over the range of travel of the arm 32, as represented by curve 84 of Fig. 4, whereby the arm 32 is responsive to slight changes in the energization of the winding 48 of electromagnet 4
- 04 of Fig. 5 represents the type of sensitivity response of the circuit controlling device to a chan-ge from the energization of the Winding 48 Where the auxiliary leaf spring member 64 is not present.
- a control device comprising, a plurality of contact members disposed to be actuated in sequence, a member disposed to actuate the contact members, a cross-spring pivot for the actuating member, a biasing means secured to the member to effect a non-linear pull thereon to actuate the member in one direction about its pivot, electroresponsive means disposed to be energized for actuating the member in the opposite direction about its pivot, a stop means disposed adjacent the actuating member to limit the movement thereof in the one or opposite directions, and a spring means carried by the actuating member, the spring means having a free end disposed for movement between the limits of the stop means whereby the spring means is free from bias when actuated the limit in the one direction and engages the stop means when actuated in the oppO- site direction to apply a compensating force to the actuating member to render the actuating member sensitive to a change in the energization of the electro-
- a control device comprising, a plurality of contact members disposed to be actuated in sequence, a member disposed to actuate the contact members, a cross-spring pivot for the actuating member, a biasing means secured to the member to effect a non-linear pull thereon to actuate the member in one direction about its pivot, electro-responsive means disposed to be energized for actuating the member in the opposite direction about its pivot, the cross-spring pivot being disposed to have a zero bias on the actuating member at some intermediate point between the limits of movement in said one and opposite directions, the cross-spring pivot thereby applying a biasing force to oppose movement of the actuating member as it approaches the limit of movement of said member in either of said one or the opposite directions, a stop means disposed adjacent the actuating member to limit the movement thereof in said one or opposite directions, and an elongated leaf spring carried by the actuating member, the leaf spring having a free end disposed
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electromagnets (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA438461A CA438461A (fr) | 1942-10-30 | Appareil electrique | |
| US463979A US2403087A (en) | 1942-10-30 | 1942-10-30 | Electrical apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA438461T | |||
| US463979A US2403087A (en) | 1942-10-30 | 1942-10-30 | Electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2403087A true US2403087A (en) | 1946-07-02 |
Family
ID=52344888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US463979A Expired - Lifetime US2403087A (en) | 1942-10-30 | 1942-10-30 | Electrical apparatus |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2403087A (fr) |
| CA (1) | CA438461A (fr) |
-
0
- CA CA438461A patent/CA438461A/fr not_active Expired
-
1942
- 1942-10-30 US US463979A patent/US2403087A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA438461A (fr) | 1946-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2310138A (en) | Electrical switching apparatus | |
| US2403087A (en) | Electrical apparatus | |
| US2246306A (en) | Regulator | |
| US2246295A (en) | Control system for electrical apparatus | |
| US2241811A (en) | Regulating system | |
| US2383942A (en) | Automatic electrical control means | |
| US1764382A (en) | Regulator system | |
| US2221587A (en) | Voltage regulator | |
| US2390796A (en) | Regulating apparatus | |
| US1915050A (en) | Regulating system | |
| US1259172A (en) | Electric regulator. | |
| US2504909A (en) | Regulator | |
| US2390809A (en) | Circuit-controlling apparatus | |
| US1751225A (en) | Regulator system | |
| US2426035A (en) | Generator voltage regulation | |
| US1445994A (en) | Electeomagnetic device | |
| US2374008A (en) | Regulating system | |
| US2264986A (en) | Regulator | |
| US1326355A (en) | Electric relay. | |
| US2414570A (en) | Regulating system | |
| US2295397A (en) | Regulator | |
| US1135438A (en) | Electrical relay. | |
| US2276651A (en) | Regulating system | |
| US2365541A (en) | Shockproof relay contact | |
| US1962898A (en) | Electroresponsive device |