US1810024A - Relay circuit - Google Patents

Description

June 16, 1931.

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Z-'Shutl-Shoet 2 1 lllll l l l l l l l l l l uuvvv AAAAA /NVENraR FE CI MAT/45s TRNEY Patented June 16, 1931 ROBERT- C. MATHES, OF WYOMING, LABORATORIES, INCORPORATED, YORK RELAY CIRCUIT Application led June 6, 1929.A Serial No. 368,895.

This invention relates to accelerating and delay action devices and more particularly to relay arrangementsv suitable for controlling signal operated devices in signaling systems such for example, as voice operated control circuits. y

The main object of the invention is to provide a circuit arrangement which will operate quickly and hold for a suicient time after it operates to insure proper operation of the circuit with which it is to be employed.

One of the features of this invention consists in the method employed to secure `rapid operation without contact chatter when the relay is employed in connection with signal operated volume control circuits.

A relay having a plurality of windings is employed in conjunction with a single source of potential and resistances `and condensers. Two condensers are employed, each of which is in series with a winding of the relay. When an impulse, as for example, from the output of a voice operated detector circuit, is-transmitted through the operating winding, the armature is movedvfrom its normal position and the normally closed contact'opens. This causes one of the condensers to discharge through one ofthe accelerating windings referred to and assists in completely operating the relay. When the armature makes contact with the normally open Contact, a second condenser charges through the other aecelerating winding on the relay which holds the armature rigidly against this contact,

thereby preventing contact chattering. When this holding current approaches zero amplitude and the current through the operating winding approaches Vzero amplitude, mechanical or electricalbias maybe used to break the armature from the normally open contact. The second condenser discharges through the accelerating winding associated therewith and assists vthe armature to return to its normal position. When the armature makes with the normallyclosed contact, the condenser first referred to charges through the accelerating winding associated therewith and produces a holding force similar to that obtained when the armature makes contact with the normally open contact. When.

.ments shown in Figs. 1

no mechanical or electrical bias is used to make one contact the normally closed contact, the arrangement functions to accelerate and make more positive the normal functions of a polar relay.

The invention will be better understood by referring to the following detailed description and accompanying drawings, wherein Figs. verse embodiments of the invention, and Figs. l--A and 2-A illustrate the same embodiand 2 respectively, showing the relays in schematic form to facilitate understanding the description of the invention.

Referring to F igs.` 1 and 1-A, the polar relay 1 comprises a yoke 2, a permanent magnet 4 associated with the yoke, windingsI 3, 5 and 6 and an armature 7, which armatureis arranged to swing between contacts 9 and 10. The armature 7 is held in the position shown, away fromV -the yoke leg 19, by biasing means 8.

Coil 3 is connected tothe input circuit 11. One end of winding is connected to contact 9. The other end of Winding 5 is connected to one end of condenser 12, the other end of which `condenser is connected through a resistance 13 to a source of potential 14. One

end of winding 6 is connected to contact 10. The other end of winding 6 is connected to one end of a. condenser 15, the other end of which condenser is connectedthrough a resistance 16 to the side of the source of potential 14 to which resistance 13 is connected. A resistance 17 is connected, in parallel with the series connection of the winding 5, condenser 12 and resistance 13, from contact 9 to the side of the'source of potential 14 to .which resistances 13 and 16 are connected. A resistance 18 is connected, inparallel with the series connection of the winding 6, conv denser 15 and resistance 16, from contact l() to the side of the source of potential 14 to which ` resistances 13, 16 and 17 are connected. The opposite side of the potential source 14 is connected to the armature 7.

The operation of this system is as follows: `When an impulse, as for example, from the output of a. voice-operated detector cir- 1 and 2 are circuit diagrams of di-,

NEWJERSEY, ASSIGNOR TO BELL TELEPHONE OF NEW YORK, N. Y., A CORPORATION NEW (I il cuit (not shown) is transmitted from the input circuit ll through winding the armature 7 is moved from its normal position shown, thereby breaking the connection between armature 7 and contact 9. Then the connection between armature 7 and contact E) is broken condenser l2 discharges through resistances l?) and 17 and winding 5, thereby aiding the current through Winding il in moving the armature toward the yoke leg L9.

Vfhen the arinaftlnfe 7 makes connection with contact l0 the condenser l5 is charge/l up through the circuit from the source o'l' potential le, resistance 1G, condenser l5, Winding G, contact Yl0 and arma-ture 7 to the other side oi the source oit potential M, thercby tending to hold the armature 7 rigidly in its operated position Without contact chatte-.'ng taking); place between the armature 7 and contact l0.

Then the operating current through Winding` irl approaches zero amplitude and the condenser l2 has discharged and the condenser l5 has charged, the biasing means 8, causes the armature 7 to move away 'from the yoke leg` l), thereby movin armature 7 away Y troni contact 10. As soon as armature 7 disconnects .from contact 10, the condenser .l5 discl'iargcs through resistances 1G and '1S and winding (3, thereby aiding the biasing means in moving the armature 7 to its nonoperated r normal position.

soon as armature 7 makes connection with Contact 9, condenser l).- is charged up through the circuit from the source o'l" potential let, resistance 13, condenser lf2, Winding 5, contact 9, and armature 7 to the other side oi the source ot potential lil, thereby tending to hold the armature 7 rigidly in its nor mal position without contact chattering taking place between armature 7 and Contact 9.

A'tter condenser l5 has discharged and condenser 12 has charged, the system is ready to again operate in responso to an impulse transmitted through Winding 3.

Referring to Figs. 2 and QMA, the polar relay 5l comprises a yoke a permanent magnet 5st associated With the yoke, Wind ings 53, and 56 and an arn'iature 57, vwhich arnniture `is arranged to swing between contacts 59 and GO. 'lhe armature 57 is held in the position shown, away from the yoke leg (39, by biasing` means finding is connected. to the input circuit (il. @ne cnd of Winding is connected to the contact 59. The other end ot winding 55 is connected. to one end of condenser 62 and the other end of which condenser is connected through. a resistance G3 to one side oi" a source oi potential (St. One end o'l1V winding 5G is connected to contact G0. The other end of winding 5G is connected to one end oit condenser G5, the other end ot which condenser is connected through a resistance (En to the side of' the source of potential (ist to which resistance 63 is connected. A resistance 67 is connected, in parallel with the series connection of the winding 55, condenser 62, resistance 63 and source of potential 64, from contact 59 to the side of the source of potential (54 opposite that to which the resistances G3 and (i6 are connected. A resistance 68 is connected, in parallel with the series connection of the Wiiiding 5G, condenser 65, resistance G6 and source ot potential (34, from contact 6() to the junction of the resistance 67 and the source ol': potential (S4. The armature 57 is connected to the unction of resistances G3 and 66 and the source of potential 611;.

The operation of this system is as follows: When an impulse, as for example, from the output of a voice-operated detector circuit (not shown) is transmitted from the input circuit 61 through Winding 53, the armature 57 is moved from its normal position shown toward yoke leg 69, thereby breaking the connection between armature 57 and contact 59. When the connection between ari'iiature 57 and contact 59 is broken, condenser (52 charges through resistances (33 and (S7 and winding 5V thereby aiding the operating current through Winding 53l in moving the armature 57 toward yoke leg G9.

lVhen armature 57 makes connection With contact GO the condenser G5 discharges through the circuit from condenser (35, resistance GG, armature 57, contact (i0, andn'imb ing 56 to the opposite side of condenser (l5, thereby tending to hold the armature 57 rigidly in itsI operated position without contact chattering taking place between armature 57 and contact G0.

Then the operating current througl'i winding 53 approaches Zero amplitude and the. condenser 62 has charged and the condenser has discharged, the biasing means 58 causes the armature 57 to more away troni the yoke leg 69, thereby disconnecting armature 57 from contact 60. As soon as armature 57 disconnects from contact G0 the condenser (55 charges up through resistances (36 and (SFS and Winding 5G, thereby aiding the biasing means in returning the armature 57 to its normal position.

As soon as the arii'iature 57 makes connection with the contact 59, the condenser 32 discharges through the circuit including the resistance G3, armature 57, contact :Wand Winding 55, thereby tending to hold the armature 57 rigidly in its normal position without chattering taking place between a ature 57 and contact 59.

After condenser G5 has charged and rondenser 62 has discharged, the system is again ready to operate in response to an impulse transmitted through Winding 58.

It is within the invention to omit the bia ing means referred to in the detailed do scription of the construction and operation having a pair of contacts, an armature arranged to swing between said contacts, an

operating winding and accelerating wind-` ings, a source of potential, a capacitance and a resistance connected in series across each of said accelerating windings, connections from said resistances to said contacts, other connections from said resistances to said source of potential, a connection 'from said armature to said source of potential, said connection arranged in a manner such that th charging and the discharging of said condensers accelerates the movement of said relay armature from either of said contacts to the other of said contacts and hold said armature against said other contact for a predetermined period of time.

Q. A polar relay comprising an armature, a pair of contacts between which said armature is arranged to swing, an operating winding, an electric accelerating circuit associated with said armature and the normally closed contact, another electrical accelerating circuit associated with said armature and the normally open contact, said electrical accelerating circuits comprising accelerating relay windings, capacitances, resistances said contacts, said armature and a source of potential.

3. A polar relay comprising an armature, a pair of contacts between which said armature is arranged to swing, an operating winding, an electric accelerating circuit associated .with said armature and the normally closed contact, another electrical accelerating circuit associated with said armature and the normally open contact, said iirst-mentioned electrical accelerating circuit comprising an accelerating relay winding one end of which is electrically connected to said normally closed contact and the other ond of which is electrically connected through a condenser and a resistance to a source of potential, another resistance electrically connected from said normally closed Contact to one terminal of said source of potential and a connection from said. source of potential to said armature, said secondv contact to one terminal of said source of potential.

4. A polar relay circuit, including a relay having a pair of contacts, an armature arranged to swing between said contacts, an operating winding, accelerating windings with associated capacitances, resistances and a source of potential, connections from said contacts and said armature to said accelerating windings and their associated capacitances, resistances, and source of potential, so arranged that the opening of either contact initiates a change in the charge of one of said. capacitances through the accelerating winding associated therewith, thereby accelerating and positively carrying said armature to the other of said contacts, and the closing of either contact initiates a change in the charge of one of said capacitances through the accelerating winding associated therewith, thereby holding said armaturemore firmly to said closed contact.

5. A polar relay circuit, including a relay having a pair of contacts, an armature arranged to swing between said contacts, an operating winding, accelerating windings with associated capacitances, resistances and a source of potential, connections from said contacts and said armature to said accelerating windings and their associated capaci'- tances, resistances, and source of potential, so arranged that the opening of either contact initiates a change in the charge of one of said capacitances through the accelerating winding associated therewith, thereby accelerating and positively carrying said armature to the otherl of said contacts, and the closing of either contact initiates a change in the charge of one of said capacitances through the accelerating winding associated therewith, thereby holding said armature more firmly to said closed contact for a predetermined period of time.

6. In a relay circuit, a relay having separate windings, each in circuit with a condenser, a moving armature controlled by said windings, and means under control of said armature for alternatively and individually charging said condensers and discharging them through the respective windings, each winding on the charge of its associated condenser influencing said armature in one direction and upon the discharge of its associated condenser influencing the armature in the opposite direction.

In witness whereof, I hereunto subscribe my name this 3 day of June, 1929.

ROBERT C. MATHES.

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