US1500089A - Circuit breaker - Google Patents

Description

"July 1 1924. 1,500,089

E. B. NOWOSIELSKI CIRCUIT BREAKER Filed April 29 1919 INVENTUR EON/7K0 5. NUNUSIELE/l BY W297 Patented July 1, 1924.

UNITED STATES PATENT OFFICE.

EDWARD B. NOWOSIELSKI, OE BIiOOMl IE-LD, NEW JERSEY, ASSIGNOR TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY.

CIRCUIT BREAKER;

Application filed April 29,

To all whom it may concern Be it known that I, EDWARD B. NOWOSIEL- SKI, a citizen of the United States, residing at Bloomfield, in the county of Essex and 6 State of New Jersey, have invented certain new and useful Improvements in a Circuit Breaker, of whichthe following is a specification.

This invention relates to atype of circuit breaker'to be used particularly in connection with an ignition apparatus that is used on an internal combustion engine. In the past few years the rotative speed of such engines has been gradually increased until the problem of designing a circuit breaker for the ignition circuit has become a serious one. 'lVhere a large number of cylinders have to be fired in rapid rotation, such as on an airplane engine of the 8', 12 or 16 cylinder type, the circuit breaker has to act very rapidly if satisfactory results are to be obtained.

It is the principal object of my invention to provide a circuit breaker which will operate exceedingly fast and consequently deliver from the ignition coil a maximum effect at the spark plugs of the engine cylinders.

Another object of my invention is to provide a circuit breaker which is very sim le, easy and cheap to manufacture and one t iat requires very little attention in operation.

Other and further objects will be apparent to one skilled in the art'after a study of the attached specification taken in connection with the accompanying drawings, wherein, Figure 1 is an end view of an ignition generator showing my circuit breaker in operative position thereon.

Figure 2 is a;view similar. to Figure 1 of the circuit breaker but with the parts in open circuit position.

Figure 3 is a plan. view-of, the movable member of the circuitbreaker.

Figure 4 is a side elevation of one of th sections shown in Figure 3. 3 Figure 5-is, anelevationof theothersection which cooperates with the section shown in Figure '4.-

1 Figure 6v is a sectionalview of, the bearing carrying the. sections. shown in Figures 4 andj5. Figure 7 is a view of acam used for:- an irregular firing engine, that isone firing at irregular intervals.

Referring now to the details, whereinlike 1919. SeriaLNo. 293,433.

numbers refer to corresponding parts in the various views, 1 illustrates a magneto having a distributer block 2 adapted for firing an eight cylinder engine. A cam 3 carried on the driving shaft of the magneto is adapted for regular order of firing or every 90 degrees. Mounted on the end of'the ignition generator 1 is a cam holder 4 in which is set an oil wick 5 for lubricatingthe cam 3. Mounted on the holder 4 but insulated therefromis a contact block 6 carrying an adjustablecontact 7. A bearing 8 having a hollow portion9 is carried on a stud suitably attached to the holder 4. The bearing 8 is adapted to carry a certain quantity of lubricant which works its way out of the hole 10. Bearing 8 is held on the stud by a spring 11 fitting over the knob 12. The movable mem ber of the breaker is made up of two sections 13 and 14. The section 13 is shown in elevation in, Figure 5 and preferably consists of one metal piece bent over in a manner clearly indicated in Figures 3 and 5, a con tact 15 being carried near the extremity of the section 13. Section 14 is preferably made up of asingle metal piece having arms or extensions 16 that lie between the sides of the section 13 and extend over the bottom portion thereof. The opposite end of the section 14 carries a bumper 17 which, in the form shown, is of the roller type but which may be made up in any other suitable manner. Around the central part of the section 14 is a spring 18 which in assembled position is indicated in Figure This spring l8-serves to normally hold the section 14 in the position shown in Figure 1 and acts to make. this section follow very rapidly the contour of the cam used whether it be of the type shown in Figure 1 or that shown in Figure 7. A resilient member, preferably in the form of a spring 19, is carried by the holder 4 in such a position that it is in line with the contacts 15 and 7 when the section 13 is assembled as shown in Figures 1 and 2.

In the operation of, my circuit breaker, it will be. noted that the two sections have certainindependent movements one from the other. The spring. 19 serves to hold thecsection13, normally in such position that, the contacts? and 15 are securely closed thereby producing-a good contact and itwill be apparent that the tension of thisspring hold,- ingthe contacts closed is not conveyed under this condition to the section 14 asin the usual practice which relieves the wear on the bumper as well as on the cam and therefore there is less work to be performed by the cam acting on the bumper and the sprlng 18 is made in such a manner as to give just sufticient action to the section 14 as will make it rapidly follow the cam. It will be noted that the arms or extensions 16 when the breaker points are closedare spaced away, as indicated at 20, from the bottom of the section 13 so that the section 14 when it is operated on by the earn 3 is started in movement before the section 13 is moved and at the time the projecting arms'16 strike the section 13, section 14 has accelerated to its maximum velocity and in eiiect gives the section 13 a hammer blow thereby separatingthecontacts very rapidly. After the engaging nose of the cam leaves the bumper 1,7 the spring 18, as above explained, causes the section 14 to follow the cam and the initial start is given by the spring 19 assisting the spring The holder 4 is so constructed at the point 21 that most of the flat portion of the section 13 will engage the holder along the line 21 for the greater part ofthe length of the section 13 thereby providing a stop for the section 13 of large area which feature is advantageous. Since the spring 19' is preferably placed at the extremity of the section 13 it has large leverage thereon and therefore a relatively light spring maybe used which gives an easier and quicker spring action than the spring ordinarih used in circuit breakers used for this work. A breaker constructed in two sections, such as mine reduces the inertia of the moving parts and the contacts do not rebound when the breaker is operated at high speeds and consequently a maximum spark results at the engine cylinders. V r r It will-be apparent that the circuit breaker may be used in other arrangements and that the details of the various parts may be varied without departing from the spirit of my. invention or the scope of the appended claims.

Having thus described my invention, what I claim is V 1. In a circuit breaker, a stationary member carrying a contact, a movable member carrying a cooperating contact,said movable member being in two sections arranged in tandem, one of saidsections carrying said cooperating contact and the other a bumper, means for normally holding said contacts together, a cam for acting on said bumper to operate the section carrying said bumper and operative means connecting the two sections so that-the actuation of the one by saidcam causes the actuation of the other for. the purpose described. a V

2. Ina circuit breaker, a stationary member carrying a contact, a movable member carrying a cooperating contact, said movable tioned section for engaging the first, section to transmit motion from the cam thereto.

3. In a circuit breaker, a statlonary member carrying a contact, a movable member carr in a coo eratin contact said movable member being in two sections arranged in tandem, each section having a certain movement independent of the other, oneot said sections carrying said cooperating contact and the other a bumper, resilient means for normally holding the section carrying the cooperating contact in such a position that said contacts are together, said second section having an extension overlapping the first sec;- tion but normally arcuately spaced away from it, a cam for acting on the bumper to operate the section carryingit, to cause said extension to suddenly engage with thefirst section to open said contacts.

4. In a circuit breaker, a stationary member carrying a contact, a movable member carrying .a cooperating contact, saidmoyable member being in two sections pivoted on a common center, one of said sections carrying said cooperating contact and the other a bumper, a cam for acting on said bumper to move the sections carrying it and operative means connecting the two sections so that the actuation of the one by said cam causes the actuation of the other for the purpose described. V

5. In a circuit breaker, a stationary member carrying a contact, a movable member carrying a cooperating contact, said movable member being in two sections pivoted on a common center, one of said sections carrying said cooperating contact and having resilient means associated therewith to normally hold said contacts together, the other of said sections carrying a bumperand having an extension overlapping the first section, resilient means for holding the second section normally in such a position that the extension is arcuately spaced away from the first section and a cam for acting on the bumper to move its section and said extension to cause rapid opening of said contacts. I f

6. In a high speed circuit breaker, a relatively stationary member carrying a contact, I

carried by one section near its extremity and a resilient member acting on this section snbstantlally opposite said contact to man:

ually hold the contacts in closed position, the other of said sections having an extension at one end and carrying a bumper at the other, a resilient member for normally holding the said section in such position that said extension is elevated above the first section and a cam for acting on the bumper whereby the said extension is caused to strike the first section a hammer blow to quickly open said contacts as described.

7 In a high speed circuit breaker, a relatively stationary member carrying a contact, a movable member consisting of two sectional portions capable of independent movements but pivoted on a common center bearing, independent resilient means for actuating each section in a given direction, a cam for operating one or" said sections in opposition to one of said resilient means, a contact for cooperation with the first mentioned contact but carried by the other of said sections and actuating means on the cam operated section for operating the contact carrying section in opposition to the other of said resilient means for the purpose described.

8. In a high speed circuit breaker, a relatively stationary member carrying a contact, a movable member consisting of two sectional portions capable of independent movements but pivoted on a common center bearing, independent resilient means for actuating each section in a given direction, a cam for operating one of said sections in opposition to one of said resilient means, a contact for cooperation with the first mentioned contact butcarried by the other of said sections said resilient means for operating said contact carrying section being disposed in alignment with both said contacts while the resilient means for the cam operated section is supported on said common center bearing and actuating means on the cam operated section for operating the contact carrying section in-opposition to the resilient means associated therewith.

9. In a high speed circuit breaker, a relatively stationary member carrying a contact, a movable member consisting of two sectional portions capable of independent movements, a rotating cam for operating one of said sections, a spring for causing this section to follow the contour of the cam in its rotation, a contact for cooperation with the first mentioned contact but carried by the other of said sections and a spiral spring other of said sections carrying a contact for cooperating with the stationary contact, a spring for holding said contacts normally closed and for returning said sections to closed position after being acted on by the first section and a stop for the second section extending adjacent thereto for considerable of its length.

11. In a circuit breaker, a relatively stationary member carrying a contact, a compound movable member carrying a co-operating contact, said compound movable member being constructed in two parts, each capable of movement independent of the other, means acting on one of said parts to cause it to move the other of said parts to separate the contacts and a spring mounted in and acting in alignment with said contacts to bring the part of the compound member to a position to close the contacts together after they have been separated.

In witness whereof, I afiix my signature.

EDWARD B. NOIVOSIELSKI.

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