US1114003A - Magneto. - Google Patents

Description

E. J. KANE.

MAGNETO.

APPLIOATION FILED AUG.25, 1911.

9 L AW m m H 1 L H m h E. J. KANE.

MAGNETO.

APPLIOATION FILED AUG.25, 1911. I

Patented 0ct.20 1914.

2 SHEETS-SHEET 2.

EDMUND JOSEPH KANE, OF CHICAGO, ILLINOIS.

MAGNETO.

Specification of Letters Patent.

Application filed August 25, 1911.

Patented Oct. 20, 1914. Serial No. 615,984.

To all whom it may concern Be it known that I, EDMUND Josnrn KANE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Magnetos, of which the following is a full, clear, and exact specification.

The invention relates to improvementsin magnetos adapted for use with explosive engines.

The object of the invention is to provide an electric igniter mechanism with novel and improved means for firing the charge in the combustion chambers of explosive engines.

A further object of the invention is to simplify and improve the details of construction of electric ignitermechanisms, rendering the same more ellicient and capable of operating with uniform efliciency for 111-, creased periods of time over igniters not embodying the improvements herein described and claimed.

A further object of the invention is to simplify and improve the details of con struction of an electric igniter whereby the operative parts are generally inclosed, presenting a more simple and pleasing appearance, said inclosure serving as a protection to the operative parts.

A further object of the invention is to provide an improved arrangement of the operative parts whereby variation in the se quence of the operation of the various moving parts on account of wear will cause the least possible disturbance to the sustained uniformity and efiiciency of the device.

To attain these ends and to accomplish certain other new and useful objects, the invention consists in the features of novelty hereinafter described and shown in the drawings forming a part of this specification, and finally pointed out more particularly in the appended claims.

In the draWings Figure 1 is a view of a portion of the upper end of the cylinder of an explosive engine of the vertical type shown with the invention applied thereto. Fig. 2 is a view of the igniter detached and showing the front cover plate removed. Fig. 3 is a view of the complete igniter taken at a right angle to the views of Figs. 1 and 2, with a portion of the adjacent armature or inductor operating spring audits supporting arm in section. Fig. 4 is atop plan adapted hammer view of the device with the principal, operative parts in section to disclose their construction. Figs. 5 and 6 are sectional views 1 on lines 5-5 and 6-6 respectively, of Fig. 3. Figs. 7 and 8 are enlarged perspective giews of details of the apparatus hereinafter escri bed. In Fig. 1 of the drawings, the invention is shown applied to an explosive engine of the vertical type, the cylinder of which is indicated by the reference character 10. i

The usual side opening in the cylinder 10 is provided through which is inserted the igence character 11.

Cast integral with the flange portion 11 of the igniter block 11 is a horizontal oiisct or an extension 11", carrying at its outer extremity the inside plate, which is indicated by the reference character 20, the plate being connected thereto by screws 20.

The ignitcr block 11, and the flange portion 11 thereof are provided with openings through which pass the stationary and mov-. able electrodes, the stationary electrode be ing designated by the reference character 14, and the movable electrode by the reference character 15. The stationary electrode 14 is insulated from the igniter block 11, and is provided at its outer extremity with the ignitcr point 16, and at its other extremity is provided with a binding post 17, adapted to receive the conductor 18, which at its other extremity is connected with binding post 19, mounted on inside cover plate 11, and insulated therefrom. The movable electrode 15 is provided at its inner extremity, to extend within the combustion of the cylinder opening, with a arm 21, and an igniterpoint 22, adapted to normally engage the igniter point 16 on the stationary electrode 11. At its other extremity the movable electrode 15 is preferably smnewhat enlarged in diameter, as indicated in Figs. 3, 1 and 5. Near its outer end it receives the coil spring 23, one end of which is secured to the flange member 11, and the other end to the enlarged portion of the movable electrode shaft 15, by the binding screw 24:. This spring normally holds the movable electrode chamber point 22 in engagement with the stationary electrode point 16, through the torsional 'action exerted upon the movable electrode shaft 15. At its outer extremity, the movable electrode shaft 15 is provided with an extension 25, having two surfaces as indicated at 25*, 25, adapted to be engaged by two corresponding surfaces as indicated at 26*, 26 on the hammer arm 26, fixed to the rotor or armature shaft 27.

It will be noted that rotor shaft 27 is mounted to rotate in the same axial line as movable electrode shaft 15, but that both said shafts are entirely disconnected except for such contact as takes place between the cooperating surface 26 on the trip arm 26, and the similar surface 25, on the enlarged end of the, movable electrode shaft 15. The

relation of these cooperating parts is best shown in Fig-,5, in which it will be seen that when the surfaces 25 on the movable electrode and 26 on the trip arm 26 are in contact, the movable electrode arm 21, under the tension of coil spring 23,'will at the same time be rocked to a point where the stationary and movable electrode points 16, 22 will engage each other, as shown by the relation of these parts in Figs. 3, 5 and 6.

By referring to Fig. 5 it will be seen at this.

instant that the cooperating parts 25 and 26 will be positioned so as to have their greatest degree of separation.

In order to adapt the form of ignition device herein shown and described, for use with a battery as well as a magneto it is preferably, although not necessarily, constructed so that the position of the contact points on the electrodes is separated a short distance to prevent the battery from running down. This may be accomplished by so positioning the trip arm 26 carrying the contact surfaces 26 and 26 and the member 25 with the contact surfaces 25 and 26 in relation to their respective shafts which operate the magneto and themovable electrode shaft respectively, so that when the parts are at rest, the tension of the more powerful springs 30, 31 acting on the magneto shaft and the trip arm 26, will bring the contact surfaces 25 and 26 together with suflicient force to overcome the action of the torsion spring 23 on the movable electrode shaft 15 and cause the movable electrode to separate a short distance from the. fixed electrode. \Yhen, however, the engine' causes the magneto'operating mecha; nism to move the trip 26, to separate the contact surfaces 25 26", the tension of springs 30, 31 being relieved, the torsion spring 23 controlling the movable electrode will then be free to bring the electrodes together and hold the points 16 and 22 normally together until the rebound of the magneto upon its release will cause the surface 26 on trip arm 26 to strike forcibly, or with a hammer effect the surface 25, which will separate the the outer ends of branches 34, 35, formed in-*- tegrally with the inside niter casing.

In order to improve the appearance of my igniter, and at the same time inclose as far P ate 20, of the igas possible operative parts, including the" rotor or armature, I prefer to form 'the magnets of the material commonly employed which is relatively hard steel in two U- shaped pieces, indicated by the reference characters 36, 37, and assemble them in order to form a closure as illustrated, particularly in Fig. 2 of the drawings.

The members 36, 37 when assembled'in manner shown in Fig. 2, form four walls of a closure, the closure being completedby the addition of the inside plate 20, already referred to, and an outer plate indicated by the reference character 38, both plates 20 and 38 being secured by a plurality of screws as indicated by the reference character 39, said screws passing through both inside and outside plates and engaging pole pieces 40, 41, of soft iron as commonly used for this purpose, which are secured to the U-shaped magnet pieces 36, 37, by screws as indicated at 42, 43, said screws serving at the same time to bind the U-shaped magnets 36, '37 together. The rotor shaft 27 is journaled in suitable hearings in the inside and outside cover plates 20 and 38. Adjacent the journal opening in the inside cover plate 20 on the interior of the rotor casing, there is formed a housing into which is shrunk a bearing ring 46, provided with a peripheral groove adapted to furnish a seat for antifriction balls 47, there being a ring'48'also provided with a peripheral cooperating groove securely fastened to rotate with shaft 27, by being shrunk thereon or otherwise se cured to the same. A similar anti-friction ball bearing is formed in outer side plate 38, the removable bearing ring being indicated by the reference character 49, the shaft collar by the reference character 50, both being grooved and ball bearings 47 interposed. The outer extremity of rotor shaft 27 is preferably terminated on the inside of the outer cover plate 38, in order to make the interior of the lgniter casing as compiete a closure as possible, and to exclude dirt,.dust and all foreign particles from the interior.

The pole piece 40 is preferably made of a plurality of plates usuall riveted together as at 45, and is preferably bifurcated or branched as shown in Fig. 2. Around one of these branches is wound the usual coil 51. The opposite inner extremities of the pole pieces 40, 41, are shaped in order that the rotor or armature may coiiperate therewith,

as shown also in Fig. 2, the rotor being secured to shaft 27 and being preferably of the regular form, having a hub portion and two opposed extensions, the outer extremi ties of which are expanded, each to extend about ninety degrees around the periphery of the rotor. The hub portion of the rotor is indicated by the reference character 52, the extensions by the reference characters 53, 54, and the expanded outer portions by the reference characters 55, 56. The expanded outer portions 55, 56 of the rotor are in close proximity to the circumferential surfaces at the inner ends of pole pieces 40, 41, but not in actual contact with these pole pieces.

The wire of the coil 51 is secured at one extremityto the binding post 57, where it is grounded to inside cover plate 20. At its other extremity the wire of the coil is secured to binding post 19, before referred to, which is insulated from the inside cover plate 20, and has electrical connection through conductor 18, with. the stationary insulated electrode 14.

The preferred manner of installing and operating the device is illustrated in Fig. 1, the igniter block 11 carrying the movable and stationary electrodes being inserted in the usual firing chamber in the wall of the cylinder of an explosive engine. A suitable connection is made for operating the device from the exhaust valve operating rod of the engine.

In the drawings, the exhaust valve operating rod is indicated by the reference character 57, and is shown as having pivotal connection at its upper extremity, as indi cated at 58, with the exhaust valve rocker arm. A suitable finger 59 is pivoted at 60 to the block 61, which is preferably made in two parts and clamped or otherwise secured to exhaust valve operating rod 57 by bolt 62. The upper extremity of finger 59 is deflected in order to engage and operate the hammer arm 26 through the reciprocations of the rod 57. The plane of reciprocation of the pivoted finger 59 is controlled by means of fixed roller 63 on stationary arm 64, on bracket 65, secured to the cylinder 10 of the engine. In order to hold the igniter operating finger 59 normally against the roller 63, the flat spring 66 is interposed between the finger and the rod 57.

The operation of the device is as follows: As the exhaust valve operating rod 57 is re ciprocated by the movement of the engine tum of the rotor or parts will be in a position shown in Figs.

3 and 5, the surface 26 on the trip arm 26, and the coiiperating surface 25 on the outer extremity of the movable electrode shaft-being in engagement. The effect of the action of finger 59 as the exhaust valve operating rod is lifted will be to separate the surfaces 26 and 25 without aflecting the' relative positions of the electrodes which are normally together. The rocking of the trip arm 26, however, and the rotor shaft 27 will move the rotor and the circumferential portions 55, 56 thereof, which lie close to the pole pieces 40, 41, in relation to said pole pieces and against the tension of tension springs 30, 31. When the exhaust valve operating rod has carried the trip finger 59, a sufficient distance upwardly, the trip arm 26 will become disengaged, and under the action of springs 30, 31 will quickly return the rotor shaft and the rotor to their initial position. This rotation of the rotor or armature will cause a current to be generated in a well known manner, which will ass through the pole pieces and through coil 51, as the lines of magnetic force are shiftedby the rotor or inductor, the electric circuit extending from the coil to the insulated post 19, thence, through conductor wire 18 to the insulated and stationary electrode 14, thence through the contacting igniter points 16, 22, through movable electrode 15 and through wire grounded at binding post 57 to the coil. The rotor or inductor being on its return movement under the actionof springs 30, 31, and a current being induced through the circuit, the trip arm 26 will be returned to normal with considerable force and the momentum of the parts will cause the surface 26 of the trip arm to strike the coiiperating surface 25 on the inner extremity of the movable electrode and rotate the same against the action of spring 23, which will separate igniter point 22 from 16 and cause a spark to pass at this instant through the gap between the points. This separation of the igniter points will be caused by the momeninductor, its shaft and the parts connected therewith under the action of springs 30, 31, as the parts pass beyond their normal position, will cause them ultimately to return to normal and the igniter points 16, 22 to contact, after the spark has passed.

One of the important features of the presentinvention lies in the arrangement of the parts, by which the rotor shaft 27 on which s centered the pivoted trip arm 26, lies in the same axial line as the oscillating electrode shaft 15. Heretofore, the trip arm 2% has usually been pivoted on an axial line removed from the axial line of either of the electrodes. The electrodes are passed through the igniter block and the igniter block serves as the means of secure ment of the device to the engine. Therefore, any movement of the igniter block heretofore. has been imparted to the trip arm 26, and such movement has usually been multiplied because the extreme outer end of the trip arm which contacts with the means for operating the igniter from the engine has been very much ofi center from the i iter block. In the present construction t e trip arm 26 being centered. on the i gniter block, any movement of the igniter block will afiect the relation of the parts only in the slightest degree, and hence reduce to a minimum the liability of variation in the time of spark due to movement of the trip arm.

In order that the invention might be fully understood the details of the preferred embodiment have been described.

It is not desired to be limited to exact constructions shown for'it will be apparent that those skilled in this art may make many modifications, without departing from the purpose and spirit of the invention.

1. In a magneto for explosive engines the combination with a rotor or inductor, of a plurality of magnets secured together and encircling the rotor or inmlctor, opposed pole pieces secured to the said magnets and cooperating with the rotor or inductor, a coil wound around one of the said pole pieces, side plates secured to the magnets and forming therewith a complete closure for the rotor or inductor, a shaft journalcd in said side plates for supporting the said rotor or inductor, and means for imparting an oscillatory movement to the said rotor or inductor shaft by the running of the engine.

2. In a magneto for explosive engines the combination with a rotor or inductor, a plurality of magnets securedvtogether and en circlingthe rotor or inductor, opposed side plates secured to the magnets and forming therewith complete closure for the rotor or inductor, an oscillating shaft journaled in the said side plates for supporting the said rotor or inductor, elastic means for controlling the oscillating movement of the rotor, and an arm on one of the said sideplates for supporting the said elastic means.

3. In a magneto for explosive engines the I combination with a rotor or inductor, of a plurality of magnets, secured together and intense encircling the rotor, or inductor, o posed side plates secured toithe magnets an forming therewith a" complete. closure for the rotor or inductor, a shaft journaled in the said side plates for supporting the said rotor or inductor, a pair of springs adapted to control the movement of the said rotor or inductor shaft and a' pair of opposed arms cast integral with one of said side plates and being adapted to support one end of each of said springs at their outer ex tremities.

at In amagneto for explosive engines the combination with a rotor or inductor, of a plurality of magnets secured together and encircling the rotor or inductor, opposed sideplates secured-to the magnets and forming therewith a complete closure for the rotor or inductor, a shaft journaled in the said side plates for supporting the saidrotor or inductor, opposite pole pieces secured to the said magnets-on the interior of the closure, and means for securing the said side plates to the said pole pieces of the magnets. V i Y 5. in a magneto for explosion engines, the combination with .-a rotor or inductor, of

. a plurality of magnets secured together and encircling the inductor or rotor, said magnets being formed of relatively hardened steel, opposed side pieces secured to the j magnets and forming therewith a complete closure for the rotor or inductor, pole-pieces of relatively soft iron removably secured to the magnets on the interior of the closure,

and a coil secured to one of the pole-pieces.

6. Ina magneto for explosive engines, the combination with an oscillating rotor or inductor, of ashaft therefor, said shaft being adapted to be connected with the oscillating shaft of a movable electrode on the engine whereby the axis of the rotor or inductor shaft will coincide with the axis of the shaft of the said movable electrode, and

means for coupling the rotor or inductor shaft directly with the oscillating shaft of the movable electrode, whereby the movemcnt of the rotor or inductor shaft by the runmng of the engine will impart its move-- ment to the said oscillating shaft of the movable electrode, said coupling means lyin a roximatel within the circumference & I

of both said shafts.

in testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 19th day of August A. D. 1911.

EDMU'ND'JOSEPH KANE. Witnesses A. L. SPRINKLE, NINA J. HALSNE.

five cents each, by addressing the Commissioner 05 ratents,

Washington, :0. c."

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