US1273871A

US1273871A - Engine starting system.

Info

Publication number: US1273871A
Application number: US81410A
Authority: US
Inventors: Charles F Kettering; William A Chryst
Original assignee: Dayton Engineering Laboratories Co
Current assignee: Dayton Engineering Laboratories Co
Priority date: 1913-09-13
Filing date: 1916-03-01
Publication date: 1918-07-30
Anticipated expiration: 1935-07-30

Description

C. F. KETTERING L W, A. CHRYST.

ENGINE STARTING SYSTEM.

APPLICATION FILED MAR. 1. 191B.

1 ,273,87 1 Patented July 30, 1918.

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CHARLES F. KETTERING AND WILLIAM A. CHRYST, OF DAYTON, OHIO, ASSIGNORS T0 THE DAYTON ENGINEERING LABORATORIES. COMPANY, A CORPORATION 0F OHIO.

ENGINE STARTING SYSTEM,

Specification of Letters Patent.

Patented July 30, 1918.

Original application filed September 13, 1813, Serial No. 789,641. Divided and this application filed March 1,

` 1916'. Serial No. 81,410.

To all whom t may concern:

Be it known'that we, CHARLES F. Knr'rn'u- ING and l/VILLIAM A. CHRYs'r, citizens lof the United States of America, residing at Dayton, county of Montgomery, and State of O hio, have invented certain new and useful Improvements in Engine Starting Systems, of which the following is a full, clear, and exact description.

This invention relates to a system of devices adapted to be combined with combustion or explosion engines, for supplying power to start an engine, and the engine when thus started, may be arranged to store up power for similar future starting operations, and other purposes. i

Among the objects of the present invention is to provide an electric machine of simplified construction, which may be manufactured at lowcost and easily combined with the engine' upon which it is to be installed. Y

In carrying out theobjects of the present invention, an electric machine is provided, which is so mounted upon the .apparatus with which the machineis combined, that a non-magnetic portion of the apparatus serves asa base for the electric machine to which the pole pieces are directly attached in a rigid manner without providing the apparatus with any special mounting for the machine, and also eliminating the separate non-magnetic base usually placed intermediate the electric machine and the apparatus to which the machine is attached.

The structure may be further simplified by mounting the commutator brushes of the electric machine upon a single element, which, when assembled in position, not only maintains the commutator brushes in correct position, but valso functions as a cover for the end housing ofthe electric machine.

The present application is a division of our co-pen'ding'v application, Serial No. 789,641, filed September 13, 1913 for engine starting system, Patent No. 1,250,188, dated Dec. 18, 1917.

Further objectsv and advantages of the present invention will be yapparent from the following specification, reference being had to the accompanying drawings, wherein a preferred form of the present invention is set forth.

vReferring to the drawings:

Figure 1 is a top plan view of the chassis of an automobile, including the engine and the electric machine which forms a part of the present invention.

Fig. 2 is a fragmentary detail view in section of an engine having an electric machine included in the present invention installed thereon.

Fig. 3 is a detail sectional view of the electric machine applied to an engine having a nonemagnetic crank case or portion.

Referring to the drawings and more especially to Figs. 1 to 3 inclusive, the numeral 2O designates the side frames of the chassis, while the numeral 21indicates the engine, provided with a flywheel 22, having gear teeth 28 cut'in its periphery.

The type of chassis and engine construction shown in the present instance is similar to that manufactured and placed on the market by the Buick Motor Car Company.

The dynamo electric machine is designated by the numeral 24, and is adapted to be driven as a generator, during thenormal operation of the'engine, by means of the timing gears 25, which transmit motion to the generator through the shaft 2G, as is clearly shown in Fig. 1.

The location and larrangement of the dynamo electric machine is` similar in certain respects to thatdescribed. illustratedl and claimed in the copending applications of Charles F. Kettering, Serial No. 621,512, filed April 17, 1911; Serial No. 721,237, filed September 19, 1912; and that of Charles F. Kettering and lVilliam A. Chryst, Serial No. 778,934, iilcd July 14, 1913; and U. S. patent to Charles F. Kettering, No. 1,150,523, dated August 17, 1915.

In certain types of automobiles, such as for instance in automobiles of the Buick type, the assembly of the chassis and the associated mechanisms, such as the engine, is such that an extremely limited space is provided for the installation of systems of the present type.

In the type of engine used in automobiles of the above mentioned type, the crank case or certain parts of the engine frame is constructed of non-magnetic material, such as aluminum or its equivalent.

In order to economize in space and also to make use of the non-magnetic crank case or frame of the engine, the electric machine included in the present invention is so installed on the engine that the non-magnetic portion of the engine frame will form the base of the electric machine. This arrange ment not only tends to economize in space, but also tends to eliminate certain of the elements which have heretofore been necessary in electric machines of the type set forth.

The electric machine, as will be clearly seen from Fig. 3, comprises a frame having side portions 27 and 28, connected together at their upper ends by means of the transverse bar or block 29, which is connected by any Vsuitable fastening means 30. This bar forms a support for the iield coil 31, which in the present invention contains both the generator and motor field windings.

The lower end of the side portion 27 terminates in an enlargement which constitutes one ofthe pole pieces of the machine, while the side portion 28 also has an enlarged portion which constitutes the opposite pole piece. The lower free ends of the side portions 27 and 28 are provided with lugs 27a and 28L respectively, having bearing surfaces at an angle to one another', which cooperate with similarly disposed surfaces of a corner portion of the engine crank case and serve to locate the engine crank case and serve to locate the frame in two directions with respect to the crank case and the flywheel 22. By thus locating the frame, the gearing carried by the electric machine 24C is correctly'alined'with the engine ywheel gear 23. The frame of the machine 24E is located in the third direction, longitudinally of the crank case by means of bolts 27b and 281. passing the

lugs

27 a and 28a.

It will be noted that the lugs 27 a and 28 are located on the same side of a plane'passing through the center line of armature and perpendicular to the center line of bar 29, constituting the field core; and that the pole pieces are obliquely disposed with respect to said plane. This arrangement permits the armature to be brought as close as possible to the crank case; and therefore the space at the side of the engine necessary for the electric machine 24' is reduced to a minimum. The presence of the non-magnetic crank case in close proximity to the armature will not affect the ield in which the armature is Vmounted for movement.

Any suitable arrangement may be made for inclosing the top of the machine, as by the cover 32. Y

lNhile the form of mechanism herein frame of magnetic material comprising an `intermediate portion which constitutes a core for the eld winding, and side portions which terminate in pole pieces between which the armature is mounted; lugs extending in different planes from the pole pieces and adapted to mount the frame astraddle a corner portion of a non-magnetic support with the lowest point of the armature located below the plane of the top of the support.

2. In an electric machine, the combination with an armature and field windings; of a frame of magnetic material comprising an intermediate portion which constitutes a core for the eld winding, and side portions which terminate in pole pieces between which the armature is located, the side portions extending on either side of a plane passing through the center line of the armature perpendicular to the center of the core, the pole pieces being arranged diametrically opposite with respect to the armature and obliquely with respect to the said plane, and the pole pieces being provided with lugs spaced apart and located wholly on one side of the aforesaid'plane, and adapted to secure the frame upon the corner portion of a non-magnetic support with the armature in close proximity to the support.

3. In an electric machine, the combination with an armature and eld windings; of a frame of magnetic material supporting theV field windings and the armature, said frame having portions thereof spaced apart to provide a gap there-between and provided with lugs having surfaces at an angle with one another and adaptedl to coperate with corresponding surfaces formed on a support of non-magnetic material and to locate the frame in twodirections with respect-to the support with a portion of the support located in the gap.

t. In an electric machine, the combination with an armature; of a frame of magnetic material supporting the armature; said frame having attaching bearing surfaces extending therefrom in different planes and adapted to locate the frame upon the top and side of a support with the armature 1n close proximity to the support and with the lowest point of the armature located below the plane of the top of the support.

5. In an electric machine, the combination with an armature; of a frame of magnetic material in relation to which the armature is mounted for movement, said frame having tures in the presence of two subscribing witprovlslons adapting 1t to support the Inanesses.

chine upon a, corner portion of a support CHARLES F. KETTERING. with the support in close proximity to the /VILLIAM A. OHRYST. 5 armature and occupying e gap between cer- Witnesses;

tain portions of the said frame. J, W. MGDONALD,

In testimony whereof we aiiix our signa- O. D. MowRY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C.