Oct. 29, 1946. _ M, N_ YARDENY I DELAYED ACTION RELAY 2,410,325 ‘ - Original Filed Sept. 20, 1940 8 F1 chi ' O 16 4 ‘—___Z*_, MW 17 i 2; I | 13 '4 4 'l, 5 , /* 6 Q l09’ i' 12 2| 2 l9 I8 5 ——‘——> :- 25 22 MCHEL M YA RDENY INVENTOR Q05; 1” Many ATTORNEY Patented Oct. 29, 1946 ‘2,410,325 UNITED STATES PATENT ‘OFFICE: 2,410,325 DELAYED ACTION RELAY Michel N. Yardeny, New York, N. Y. Original application September 20, 1940, Serial No. 357,660. Divided and this application Sep tember 11, 1943, Serial No. 502,055 2 Claims. - (Cl. 175-372) 2 1 My invention relates to delayed action relays magnet takes an appreciable interval of time, suf and has particular reference to relays in which ?cient for many purposes for which delayed ac tion relays may be used. the movable part of the relay is retarded in its movement. My invention is more fully described in the ac This is divisional application of my United Ul companying speci?cation and drawing in which: Fig. l is a plan view of my relay; States application, Serial No. 357,660, ?led Sep Fig. 2 is a diagram of electric connections of a tember 20, 1940, now Patent No. 2,342,717, granted February 29, 1944. In this application, I disclosed relay with two coils; Fig. 3 is a fractional View on enlarged scale of as a part of my electrical control system, a relay in which the armature or movable part of the 10 the gummy layer. My relay can be built in a variety of shapes and relay moves rapidly toward the magnet part of the relay when it is magnetized, thereby rapidly closing the circuit of a motor by the relay con tacts, but is released slowly when relay is demag . netized, thereby allowing other parts of the con types to suit different requirements, and in Fig. 1 is shown by way of an example a construction which can be used with my invention. The relay 15 consists of an iron core I‘ with two coils or wind trol system to attain stable condition of rest be fore the motor is ?nally deenergized. Such de layed action is particularly important and useful when the motor in the system is stopped by dy ings 2, 3 (although, of course, one coil can be used ordinary quick-acting relay, the delayed action being obtained by the simple expedient of apply the switches l, 22, for instance, 2 I‘ with the main gummy substance to the face of the relay mag net and/or to the face of the relay armature. My relay therefore, acts quickly when magnet is ener gized, but because of high viscosity of the gummy substance, separation of the armature from the 55 tracted to the core I, the layers l8 and I9 joining each other. As a result, current from the battery 25 will ?ow through one of the reversing ?eld if desired), with leads 4, 5, 4', 5’. An armature 6, also of iron, is mounted on a spring ‘I, rigidly supported at 8. An insulation block 9 is fastened namic braking or by other method in which cur 20 to the armature and engages a light spring l0 rent is required to accomplish the stopping. The supported at I l and connected to a lead 12 of an delayed action relay is used in such an arrange electric circuit which is controlled by the relay. Spring I0 is provided with a contact point l3 ment to deenergize the motor after electrical con-~ which engages a similar contact point M on an ditions have been established for stopping the other contact spring l5 supported on a post [6 and motor. In my system, as described in the fore having a lead [1, forming part of the controlled going application, the motor is stopped when the circuit. The contacting surfaces of the core I control device, operated by the motor, reaches a and armature 6 are provided with layers I8, [9 of desired position in which a larger current is sent through the system, and the increased current a viscous non-drying gummy substance, such as is used to trip the relay and, at the same time, to solution of latex in kerosene, vinyl alcohol, emul .ion of latex with protein glue, etc. which mate stop the motor. It is evident that under such rially retards separation of the contacting sur condition it is essential that a certain interval of time should elapse after the relay is deenergized faces. Action of the gummy substance is more to allow the motor to be completely stopped before clearly shown in Fig. 3. The layers l8, l9 adhere the current is shut oil" by the relay. 35 together when the armature B is attracted, and when the core I is demagnetized, the gummy sub The principle itself of delayed action relay is not new but previously known relays of that type stance breaks up into separate strings or ?la ments 2!), gradually becoming thinner until they were of rather complicated construction, involv ?nally break apart. This process of viscous ing the use of dash pots and other mechanical and electrical mechanisms to accomplish delayed 40 stretching of the ?laments consumes a certain action. .. amount of time. The high cost of such relays, as well as their Such delayed action may be needed in a variety relatively large sizes, render them unsuitable for of applications to electric circuits, one of which certain applications in which small and inexpen is illustrated by way of an example inFig. 2. The sive relays are required. With this object in view, 45 relay coils 2, 3 are wound in the opposite direc have developed a delayed action relay which is tions so that the core l is magnetized only when of approximately the same size and cost as an one of the coils 2, 3 is energized by closing one of switch 23 also closed as well as a starting push ing a layer of a non-drying viscous sticky or 50' button 24. The armature 6 then becomes at windings 26, 21, and the motor will rotate in a. corresponding direction. For stopping the motor, 2,410,325 3 the second switch 22 is closed thereby energizing both ?eld windings and stopping the motor by the opposing currents and electromotive forces. As soon as the motor is stopped, however, it may be desirable to disconnect the motor circuit even if the switches are left closed. This is accom plished by the provision of the two opposing relay windings 2 and 3 which demagnetize the relay core I when energized at the same time causing 4 the spirit of the invention, as set forth in the ap pended claims. I claim as my invention: 1. A delayed action relay comprising a sta tionary member and a movable member, one of the members being arranged to be energized for causing mutual attraction between the members while one of the members is energized, a portion of each member being arranged to contact a cor the motor circuit to be disconnected. It is very 10 responding portion of the other member in re sponse to one of the members being energized, and a layer of an adhesive viscous substance ap plied to one of the contacting portions for re tarding separation of the movable member from the stationary member in response to deenergiz important, however, that the motor should be completely stopped by the opposing currents be fore its circuit is interrupted, and the relay, therefore, must be of delayed action type. This purpose is satisfactorily accomplished by the use of the adhesive cement I8, I9, I have found that good results are obtained by using a gummy substance prepared with rubber, preferably latex dissolved in a non-evaporating solvent, such as kerosene. A layer of such a composition lasts under ordinary operating con ditions for over a year, which is quite sufficient ior ordinary purposes, The layer, when it be comes ineflective, can be easily repaired or re newed by the application of fresh composition. I have found that good results are obtained when the thickness of such a layer is from about .010 to about .030 inch. It is understood that my delayed action relay may be further modi?ed without departing from 30 ing the energized member. 2. A delayed action relay comprising a sta tionary electromagnet including a core and a movable armature, means for energizing the elec tromagnet for causing attraction between the ar mature and the core while the electromagnet is energized, the armature being arranged to con tact the core in response to being attracted by the core, and a layer of an adhesive viscous sub stance applied to at least one of the contacting surfaces for retarding separation of the arma ture from the core in response to deenergizing the electromagnet. MICHEL N. YARDENY.