US1259529A - Ignition system. - Google Patents

Description

L. LANGNER.

IGNlTiON SYSTEM.

APPLICAHON HLED SEPT. 22, 1913.

L259,5Q& Patented Mar. 19,1918.

' from the battery at increase the efficiency brating spark LAWRENCE LANGNER, OF NEW YORK,

.. ASSIGNOB TO THE DAYTON ENGINEERING LABORATORIES COMPANY, A CORPOBATIQN 0F GHID.

IGNITION SYSTEM.

To all whom it may concern:

Be it known that I, LAwRnn on Lax-oxen, a subject of the King of England, residing at New York city county of New York. and-State of New York, have invented certain new and useful Improvements inlgnition Systems, of which the following is a full, clear, and exact description.

This invention relates to improvements in ignition systems for engines, and more particularly to combined ignition and starting systems for the internal combustion engines of automobiles or the like.

. It is a well known fact that magneto ignit-ion systems present desirable features of advantage, in that the intensity of the sparking increases with increased engine speeds. On the other hand, the engine can not be started so satisfactorily with magneto ignition as with vibrating spark battery ignition.

Qne of the objects of my invention is to permit of starting eifieiently with magneto ignition. Another object is to accomplish this without altering the construction. of magnetos as placed upon the market to-day by magneto manufacturers.

The universal adoption of self-starting devices for automobiles has caused some controversy as to desirable cranking speeds. Starting device manufacturers making start.- ing devices, which crank at high speeds, claim that there is an advantage in doing so, owing to the possibility of cranking with magneto ignition. However, excessively powerful starting motors are required for this purpose. and the heavy current taken the moment of starting is liable to damage the battery. Manufacturers of starting devices which crank at lower speeds claim that they car use a smaller starting device with consequent advantages in economy. efficiency and saving in space, the engine being started upon \ibattery ignition.

Afurther object of the present invention is to arrange whereby a starting device. cranking the engine at low speeds, will be able to start the engine upon magneto.

A further object of the invention is to of magneto ignition. enerally and articularly in the case where uel heavier tl ian gasolene is employed.

An additional object of the invention is Specification of Letters Patent.

Patented Mar. 19", 1918-.

Application filed September 22, 1913. Serial. No. 750,968.

to prevent the permanent magnets of mag neto ignition machines from losing their magnetism.

In accordance with my invention. l pro vide electrical means for increasing the sparking strength (if-magneto ignition inachines, and I do this by leading current from a battery or other source of electricity into the magneto. In one embodiment of my invention, I provide the permanent magnet of the magneto machine with one or more electromagnetic windings, through which the battery current flows, thereby increasing the intensity of the magnetic flux of the machine. In some cases. I. do not interfere with the construction of magnetos as placed upon the market. but provide an electromagnet attachment which. serves the same purpose.

some preferred cmbodii'nents of the invention are illustrated in the accompanying drawings, in. which Figures '1. 2 and are diagrams of different electrical systems, while Figs. 4. and 6,.illustrate three forms of electro-niagnetic attachments in end illustration, parts being shown in section.

Referring to Fig. 1. the dynamo l charges the battery 2, to which is connected the winding 3 of the magneto attachment 4.

' he winding 3 can be cut-out of circuit by opening the switch 5.

Fig. 2, shows the invention applied to the well known Delco system of starting and lighting, described in the application of Charles Franklin Kettering, 721,237, filed september 19, 1.912. lV-hen the starting device acts as a motor to start the engine, the contact 5 is moved to the dotted line position 7. Current then flows from battery 2 through lead 8. motor armature winding 9, series field 10, bar 11. contact (3. bar 12 and lead 13 back to battery.

It will be noted that the contact plate 6 is an L-shapcd construction, such that when moved to the dotted line position shown in Fig. 2, the lower part of the plate bridges across the insulating portion shown between the plate 11 and the terminal 11. To this terminal ll. is connected the lead wire 11". which connects with the magneto winding 3. By this means. not only does the current come from one side of the battery through the starting motor for the starting opera- Serial K0.

tion, when the contact plate is shifted to the right in Fig. 6, but also a portion of this current, dividing at the point 11, goes through the magneto winding 3 and back to the battery. This increases the intensity of the magneto sparking at the moment of starting, so that if desired, the starting device can crank on magneto with a low cranking speed.

On returning the contact plate 6 to the full line position of Fig. 1, the starting motor is now acting as a generator, and no further current passes through the magneto winding 3, because the contact is broken by the shifting of the plate 6 to the left in Fig. 2. But, if desired, current can be sent into the winding 3 while the engine is running, by closingthe switch'lfi.

17 is the generator armature winding, and 18 is the shunt field winding of the Delco motor-generator, the construction of which is generally well known, and is described in the Kettering application just above referred to. I

Fig. 3 shows my invention applied to a two unit equipment comprising a separate dynamo and motor. Upon closing the switches 19, current flows from the battery 2 charged by the dynamo 1, into the motor 20 and winding 3. When the engine is running and the switches 19 are opened, the magneto may still be energized, if desired, by closing the switch 30.

In case it is not desirable to alter the construction of the magneto machine, I may provide electro-magnetic attachments adapted to be fitted upon the magneto, so that where a starting device is fitted on an engine equipped with the usual magneto, this same magneto may be employed for the purposes oi my invention.

In Fig. 4, which shows a magneto of the well known Bosch type, I have shown an attachment in the form of a frame or strap 21, prcieraljily of magnetic material, Which is adapted to fit over the permanent magnets of the machine. This strap is bent around, at each side thereof, to form a housing 93 for a soft iron core 24, and around this core and housing is arranged the winding 3. The terminals 25 serve for screwing the attachment on to the magneto.

In Fig. 5 the attachment is in form of a non-magnetic brass strap 21 tied together at the upper end, and bent to provide a housing For the electro-magnet which is maintained in said housing by means of pins 26 extending from the core 27 through holes in I ho housing.

instead of providing a separate core. I may form the strap of soft iron and bend it :ls shown in Fig. (3 to form the core.

The increased sparking effect of magneto ignition system in accordance with the invention, is particularly valuable con.-

eas es ncction with the use of heavy fuels for internal combustion engines. As shown in Fig. $5, the intensity of the spark can be varied at Kill in accordance with the fuel being used, by means of the rheostat 32.

The advantages of using this invention, whether for hand or mechanical starting, or for running conditions, will be apparent to those skilled in the art. Other modifications may be made without departing from the generic scope of my invention.

It will be understood that in the claims which follow I use the term high tension magneto ignition machine to mean a machine in which the high tension sparking impulses are actually generated in the machine itself, and not by means of a coil external to themachine, as in low tension ignition machines. By magneto ignition ma chine Imean a machine in which the magnetic field is normally derived from a perinanent electric magnet.

What I claim is:

1. In an ignition system, the combination with a magneto, of a supplementary electromagnetic device for said magneto; an cngine starting device; and means for simultaneously causing the operation of said starting device ind energizing said electromagnetic device.

2. In an ignition system, the combination with a magneto, capable of supplying sparks eliicient for starting when driven at high speed, and a starting device adapted to drive said magneto at low speed; and means for increasing the sparking efficiency of the magneto.

3. In an ignition system, the combination with a magneto, of supplemental means for augmenting the normal sparking efficiency oi the magneto, and selective means for utilizing the normal magneto, or the normal plus said supplemental means.

4. In an ignition system, the con iljiination with a magneto, of current supply independent of said magneto; an elcc'iro-magnetic device associated. with the magnetic field of the magneto and controlled by said. independent current supply; ant. means for opening and closing said circuit so as to temporarily increase the strength of the field of said magneto and thus increase the strength of the current. produced thereby.

In an ignition system for explosive engines, the combination with a magneto, of: a starter for the engine; coils around the magnet of said magneto; a current supply indcpendent of said magneto; and means for connecting and disconnecting said current supply to said coils to tcnnJoi-arily increase the magnetic field oi said magneto when the starter is operated.

b. an ignition syslem tor explosive cirgines, the coml'iiiiation with a nmgnolo: of coils associated with the i'ield of said may note; a source of electric currentnnd a motor in circuit therewith; and means for connecting said motor and current source in circuit with said coils, so as to increase the tor for starting said engine, a source of cur rent supply for said motor, coils associated with the fields of-said magneto, and means for connecting said coils and said motor simultaneously to said source of supply, as and for the purpose specified.

In testimony whereof I aflix my signature in the presence of two subscribing Witnesses.

M. LAWSON DYER, THOMAS J. BYRNn.

Copies oi this patent may be obtained fer five cents each, by addressing the Gommissloner e)? Patents,

' Washington, D. C.

Images