US1429009A - Electromagnetic contact device - Google Patents

Electromagnetic contact device Download PDF

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US1429009A
US1429009A US26980119A US1429009A US 1429009 A US1429009 A US 1429009A US 26980119 A US26980119 A US 26980119A US 1429009 A US1429009 A US 1429009A
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armature
contact
working
magnet
movement
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Wynne Mary
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Wynne Mary
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00Devices in which sound is produced by striking a resonating body, e.g. bells, chimes, gong
    • G10K1/06Devices in which sound is produced by striking a resonating body, e.g. bells, chimes, gong the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062Devices in which sound is produced by striking a resonating body, e.g. bells, chimes, gong the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
    • G10K1/063Devices in which sound is produced by striking a resonating body, e.g. bells, chimes, gong the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a bell
    • G10K1/064Operating or striking mechanisms therefor

Description

V. C. WYNYE. DECD.
M, WYNNE. Ammasmm'on.
ELEJTROMAGNEHC CONTACT DEVICE,
APPLICATION FILED JAN.6,1919.
Patented Sept. 12, 1922,
INVENTOR. BY W (,6 04
* ATTORNEYf.
Patent ed Sept. 12, 1922.
UNITED STATES PATENT OFFICE.
VALENTINE C. WYNNE, 0F ALBANY, NEW YORK; MARY WYNNE ADLHNISTRATOR OF SAID VALENTINE C.
WYNNE. DECEASED.
ELECTROMAGNETIC CONTACT DEVICE.
Application filed January 6, 1919. Serial No. 269,801.
T 0 all u-bom 2'2 may concern:
Be it known that I. VALENTINE C. VYXNE, a citizen of the nited States, residing at the city of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Electromagnetic Contact Devices, of which the following is a specification.
My invention relates to a new device or combination of parts for making and breaking the operating electrical contacts of electro-magnetically operated apparatus of any type which involves repeated mechanical movements of a vibratory. oscillating, or reciprocating character; and my invention is particularly applicable to large electric bells 0r gongs, and to electrically operated mallets, hammers. pendulums, door-openers, and other apparatus involving repeated similar movements of a soft-iron armature or core actuated by means of electro-magnet-ic force, and in which such movements are arranged to be controlled by the making and breaking of the energizing electric circuit at predetermined positions of such armature or core by means of opposing make-and-break con tacts and not by means of a revolving commutator.
The principal objects of my invention (necessarily.considered in connection with its application to some useful movement,
such as, for instance, to an electric bell, as
shown upon the accompanying drawings) are, first, to allow the operating electrical contacts of the movement concerned to be in proper contact when the movement is at rest and while the external part of the energizing electric circuit is open (as at the push-button, switch. or other controlling device used), so that the working armature of the movement may be ready to respond at once when such break in the external part of the circuit is closed; second, to enable the operating electrical contacts of the movement to remain closed during the forward or attracted movement of the working armature or core, until such time as the armature or core shall have reached a desired and predetermined position not far from the end of its forward movement; and, third, to allow the operating electrical contacts then to open (and thus to release the armature or core from further attraction) and to separate rapidly and clearly, and to remain open until the released armature (now making its return or backward movement) shall have reached a suitable and predetermined distance from its forward position and not far from its normal position of rest. so that the free backward or return movement of such armature or core shall not be impeded by undesired magnetic attraction until it has reached such predetermined position, when the operating contacts again close and the working armature or core is ready for a repetition of its movement in case the external parts of the electric circuit still remain closed. The useful object to be attained by these three features of the operation of my device is to increase the effective pulling distance of, and to give a more sustained and more powerful magnetic pull upon, the working armature or core of the mechanism or apparatus concerned, with a correspond ing increase in the energy of the stroke of the hammer (or other device used for the application of the force of the .workin armature), than is obtainable without the use of my contact device and with the same stated above are attained in the manner hereinafter described. Briefly, my inventlon consists in having one member of the make-and-break or operating contacts of the apparatus concerned mounted upon, or suitably actuated by, the working armature or core of the bell, hammer, or other mechanism or apparatus, in substantially the usual or an equivalent manner; while the other member of the operating contacts is mounted upon a movable supporting member of suitable form (designed or modified to suit the particular conditions of the ap plication concerned), and so arranged that. such movable member is moved in one direction by means of electro-magnetic attraction, and is caused to return to its original position by means of a. spring or by gravity or in other manner to suitthe particular mechanism concerned, and operates in such manner as to give the desired results already described.
In the accompanying drawings, Fig. 1 shows a front elevation of a complete electric bell or gong, with the addition of my device as hereinafter described in detail, with all moving parts in their normal position of rest. Figures 2 and 3 show in detail the essential moving parts of the Same bell and contact device, but in different relative positions. All similar parts shown in the three views are marked with similar reference letters; and in these three figures all parts are shown in project-ed view, except that, for clearness, the working armature member A, is shown in section at and adjacent to the hole H. Fig. 4 shows a side view of the armature A.
It is to be distinctly understood that I am not now concerned with the particular form of the bell or other piece of mechanism to which my invention may be applied, and that my invention is not in any way limited to the particular form of the contact device as shown upon these drawings; and that the particular form of hell movement shown, and the manner in which my invention is applied thereto, as shown, are selected merely for convenience of illustration to indicate one simple and practical form in which the application of my invention can be easily made, and in which form the general action of the contact device covered by my invention can be easily and clearly shown. Incidentally it may be stated,-however, that in the case of large electric bells or any other powerful electro-magnetic movements made up with a similar swinging armature, it would not be satisfactory to mount such working armature upon a vibrating spring member as shown, but it would have to be mounted upon substantial trunnions or pivots, or in other satisfactory manner, in order to maintain its alignment and its proper position at all points of its stroke or movement.
The following is a detail description of .the application of my invention to the electric bell shown upon the accompanying drawings:
In Fig. 1, M and M are the poles of a bipolar electro-magnet. A is the soft-iron working armature, and is shown as mounted upon a flat spring member L fastened to the rigid post K. The armature A has a hole H through it (as indicated also in Fig. A), of ample size to clear the member B in all operating positions, but not so large as unduly to reduce the surface of the armature A exposed to the magnetism of the pole M The armature A is shown as carrying one member D of the operating or make-andbreak contacts, and also the rod R with its hammer-ball W. T and T are the usual binding post. X is a hell or gong. The stiffness of the armature spring L and its form and position are all supposed to be adjustable, so that the position and range of movement of the working armature may be adjusted as desired. The rod B and the ham mer-ball W are supposed to be properly adjusted with regard to the position of the bell and of the armature A, and with regard to the strength of the energizing current, to
give the most effective blows. The magnet poles are supposed to be protected by means of a thin coating of copper or paper, or in other satisfactory manner, to prevent the armature from sticking due to the residual magnetism after the current is broken upon the opening of the operating contacts.
In Fig. 1, B is a small auxiliary armature of soft-iron, shown mounted upon a fiat spring member E, which in turn is held upon the rigid post J. In the form shown, the armature B is held to the spring E by means of lock nuts, and is adjustable to desired position, and is electrically insulated from the spring E by means of fibre or similar washers and by an insulating bushing. The member E also carries the movable contact member C, which is electrically and mechanically clamped to the member E by means of lock nuts, and is adjustable to desired position with regard to the opposin contact member D. The spring member E and the attached small armature B and the movable contact member C are all supposed to be easily adjustable to desired relative positions. The length and stiffness of the supporting member E, and the size and weight of the parts which make up the little armature l8 and the movable contact member C, are all so designed and adjusted, with regard to the working armature A and its at tached rod R and hammer W and its controlling return spring member L, that the natural and controlled vibration periods of such member E, with its attachments, are appzeciably shorter than the natural and magnetically controlled vibration periods of the working armature A, with its attachments.
In Fig. 1, F is a rigid post to which is affixed an adjustable set-screw G (or any equivalent adjustable device), which simply serves the purpose of limiting the backward or return movement of the member E carrying the auxiliary armature B and the movable contact member C, and dampens out any undesirable free vibration of such members. a
The electric circuit of the bell shown is from terminal T to post J, to arm E, to the movable contact member C, thence to the opposing contact member D, then through the working armature A and its supporting arm L to the post K, then around the magnet coils and to the other terminal T The operation of my invention, in connection with the bell movement shown, is as follows: When the parts are in their normal position of rest, as indicated in Fig. 1, the operating contacts C and D are closed, as shown, and, if the external part of the energizing electric circuit is then closed (through a push-button, switch, or other device), the electro magnet cores M and M become energized and they attract the working armature A and the auxiliary armature B. As the auxiliary armature B, with its attached holding arm E and movable contact C, has a decidedly shorter vibration period than that of the heavier working armature A, with its attached parts, there is no tendency for the contact member D to be immediately drawn away from the opposing contactmember C but, instead, the armature B hastens to reach the magnet pole M and thus causes the movable contact member C to be forced tightly against the contact D attached to the more slowly movmg working armature A. The several parts are so adjusted that the auxiliary armature B brings up against the pole M before the working armature A reaches the magnet poles, and when the armature A reaches such position (determined by trial and adjustment) as the strength of the energizing electrlc current and the weights of the connected parts render advisable; so that the further small advance of the heavy working armature A, due to the inertia of the parts, causes the operating contacts C and D to open the circuit and thus deenergizes the magnets M and M after which the released a-rmatures B and A, in turn. begin to return to their backward or rest positions. (The return or backward movements of the working and the auxiliary armatures may be effected by the spring of the supporting arms-as in the case of the bell movement shown-or by independent springs. or by gravity, or by magnetic force. or by any other special means provided, as the nature and size of the mechanical movement concerned may render advisable.) As the vibration period of the auxiliary armature B and the attached movable cont-act member C is shorter than that of the working armature A with the attached contact member D, the contact member D does not overtake and again come into contact with the contact member C until the auxiliary armature B has reached the limit of its backwards motion. or some predetermined position not far therefrom; at which point the operating contacts C and D are again closed, and the working parts are then in position and ready to begin a repetition of the movements provided the external part of the energizing electric circuit is till closed.
Fig. 2 shows the working parts in the position when the auxiliary armature B has come into contact with the end of the magnet core M (or, it might be, against any other suitable adjustable stop provided for such purpose), and the Working armature A has advanced slightly further and has caused the separation of the working contacts C and D, as above described. Fig. 3 shows the same parts, but in the position 7 when the light auxiliary armature B and its attached movable contact member C have finished their return stroke and have substantially come to rest. while the working armature A. with its attached contact member D. has not yet traveled back quite far enough to bring .the contact member D up against theopposing contact member C.
My invention covers all necessary parts required for affording the electrical contact features described. whichbriefiy--consist in (1) making contact at the desired position of the working armature of the mechanism concerned, maintaining the contact firmly during the whole length of travel of the working armature of the mechanism. and (3) quickly and positively breaking the working contacts at the desired position of the working armature. and keeping the contacts separated during substantially the whole or at least during the greater part of the return or backward motion of the armature, and again closing the contacts at substantially the end of the backward movement of the armature.
In the particular bell movement shown on the accompan 'ing drawings, I utilize the same magnet or a part of it) for operating the little auxiliary armature of the contactdevice proper as is used for operating the working mechanism or armature of bell; and for convenience. in this case the auxiliary or contact-device armature is arranged to work through a clearance hole in the main or working armature. These features may advantageously be applied in many cases, where the mechanism involved will lend itself easily to similar construction,- but such features of design are merely incidental and they do not necessarily constitute any part of my invention as herein described; and my invention is by no means limited in application to mechanisms of such form and nature as will readily allow of the use of similar construction for operating the armature of the contact-device. here the design of the mechanism proper makes this preferable. the auxiliary contact-device armature may be so designed and arranged as to be electrically operated by a separate magnet or solenoid. located as conditions of design require, but energized by the same electric circuit as, and usually connected in series with, the main working magnet or coils of the mechanism concerned. In the bell movement shown, the contact-device is so arranged as to cause the make-andbreak working contacts to be kept closed by electro-magnetic attraction (acting upon the small auxiliary armature) during the forward or attracted movement of the Working armature, and the contacts are caused to separate by the action of a spring, but, in some special application of my device, it might be found preferable to let the contact members be kept in contact by means of a suitable follow-up spring during the forward or attracted movement of the working armature and then, at the desired position of such armature, to be instantly separated (and kept separate until the working armature had returned to the position desired) by a suitable magnet acting upon the auxiliary armature properly arranged therefor; in which case the magnet or coil for operating the contact-device armature would be energized by the same electric circuit as used for the working magnets of the mechanism but would usually wound to much higher resistance (so as not to pass enough current to noticeably energize the working magnets) and would be connected in shunt across the break between the working contacts. I still other cases, it might be found desirable to use a combination of both methods, that is to cause the working contacts to be kept in contact, during the forward movement of the working armature of the mechanism concerned, by means of an electro-magnet connected in series with themain working magnets, and then also to be caused to separate by means of another electro-magnet connected across the break between the working contacts. All of such difi'erent cases would simply be modified ap plications of my contact-device as herein particularly shown and described.
it am aware that prior to my invention several expedients, all more or less similar to each other, have been in use, designed to maintain the electrical contact of the makeand-break contacts of electric bells, during the forward movement of the armature, but these have been purely mechanical modifications of the spring members carrying the movable contact members and have not been electro-magnetically operated; and all of such expedients which I have seen have had the disadvantage that they did not remove the contacts sufficiently far apart after the attracted movement ofthe working armature had been finished, but, instead, they allowed the contacts again to close (and to energize the working magnets) long before the working armature had reached its normal backward or rest position and before it had been withdrawn beyond the effective magnetic field of the attracting magnets. I, therefore, do not make any particular claim for the eflicacy of the sustained-contact feature of my device, considered alone, but I claim the-device in its entirety and i its complete operation as hereinabove described.
What I claim as my invention and desire to secure by Letters Patent is 1. In a device for making and breaking the operating contacts of electro-magnetically operated apparatus, the combination of an electro-magnet; two reciprocatory armatures which are acted upon by the electro-magnet during a period in the operation of the device, said armatures being so designed and mounted that they move at relatively different rates of speed; and electric contacts carried by and with the armatures', and adapted to make and break the operating circuit when the armatures are in suitable relative positions.
2. In a device for making and breaking the operating electrical contacts of electro magnetically operated apparatus, the combination of a number of electro-magnets; two independently mounted reciprocatory armatures which are acted upon by the magnet or magnets during periods in the operation of the device, one of said armatures smaller and lighter than the other and so mounted and actuated that it moves in its path towards or away from its controlling magnet in less time than does the other armature; electric contacts carried by and with said armatures; and adjustable means for limiting the movement of the lighter armature and of the contact member carried thereby.
3. In a device for making and breaking the operating electrical contacts of electromagnetically operated apparatus, the combination of an electro-magnet; a main armature with an orifice therethrough; an auxiliary armature mounted to reciprocate in and through said orifice; contact members carried by and with said armatures and so arranged as to make contact and to separate when said armatures reach predetermined respective positions in their paths of travel.
4. In a device for making and breaking the operating electrical contacts of electromagnetically operated apparatus, the combination of an electro-magnet; a main armature arranged to be acted upon by the electro-magnet, and having an orifice therethrough; an auxiliary armature arranged to be acted upon by a part of said electromagnet, and so mounted as to move freely through the orifice in the main armature in approaching and receding from the electromagnet; electrical make-and-break contact members carried by and with the armatures, and so arranged as to make contact, and to separate, when said armatures in their courseof travel reach predetermined positions relative to each other and to the magnet; means for limiting the travel of the auxiliary armature in either direction, adjustable as to its movement away from the electro-magnet; and means of adjustment for the contact member carried by and with said armature.
5. In a device for making and breaking the operating electrical contacts of electromagnetically operated apparatus, the combination of an electro-magnet; two spring members independently mounted; main armature, actuated by said magnet in the operation of the device, mounted on one of said spring members; an auxiliary armature also actuated by the magnet in the operation of the device and mounted on the other spring member; contact members for making and breaking the actuating electric circuit, one of said members being adjustable, carried by and with the spring members; means for arresting the forward movement (that is, toward the magnet) of the auxiliary armature, and an adjustable stop for limiting the backward movement of the spring member carrying said armature; means for adjusting the relative position of the acted-0n end or face of the auxiliary armature with regard to the spring member on which it is mounted, and means for electrically insulating said armature from the said spring member.
In testimony whereof he has afiixed his signature in the presence of two witnesses. VALENTINE C. WYNNE.
Witnesses:
WALTER E. WARD, MINNIE MONTANYE.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435607A (en) * 1942-07-07 1948-02-10 Heyer Ind Inc Overload relay
US2442203A (en) * 1944-10-30 1948-05-25 Autopulse Corp Electromagnetic motor
US2463426A (en) * 1944-10-20 1949-03-01 Faximile Inc Vibratory switch
US2523020A (en) * 1947-01-14 1950-09-19 Gen Electric Magnetic starting system for electric discharge devices
US2686278A (en) * 1949-11-26 1954-08-10 Westinghouse Electric Corp Electromagnetic device
US3748611A (en) * 1972-09-05 1973-07-24 Gen Electric Relay

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435607A (en) * 1942-07-07 1948-02-10 Heyer Ind Inc Overload relay
US2463426A (en) * 1944-10-20 1949-03-01 Faximile Inc Vibratory switch
US2442203A (en) * 1944-10-30 1948-05-25 Autopulse Corp Electromagnetic motor
US2523020A (en) * 1947-01-14 1950-09-19 Gen Electric Magnetic starting system for electric discharge devices
US2686278A (en) * 1949-11-26 1954-08-10 Westinghouse Electric Corp Electromagnetic device
US3748611A (en) * 1972-09-05 1973-07-24 Gen Electric Relay

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