US1349870A - Motor - Google Patents

Description

e a full disclosure. 1

with gear 3.

PATENT. OFFICE.

,I'osEBfi'BIJuR, or New an, N. Y., AssIGnoR, .BYMESNE assiemqinnrs, T0 BIJua ,mo'ron arrniancn COMPANY, A .coar'oaa'rron or nnnmiraar.

' ELEC RICA 's'rAa'rINGflarreRArUsQ To all whom it may concern: w

- Be it known that I, J osnPH' BIJUR; a citizen of the United States, and residing at New York, -in the county'ofNew York'and State of New York, have invented a new and Improved Electrical Starting Apparatus, of which the following specification is This invention relates to dynamo-electric machinery "and more particularly to 'such machinery as used in 'connection withfithe starting of internal combustion engines. One of the objects thereof is to provide practical, inexpensive and positivelyacting 15 apparatus of the'abovenature in which-certaindesired characteristics are given to' the action of the dynamo. V p

" Other obj ects will be in part obviousfrom the annexed drawings and in part indicated in'conne'ction therewith by the following analysis 'of this invention; I

This invention accordingly consists in the features of construction, combinations of parts," and in; the unique relations of the members and in the relative proportioning and disposition thereof; all as more completly"outlinedherein I To enable others skille'd'in' the art so fully to comprehend" the underlying features thereof that they may embody the same by "the numerous 'modifications'in structure and relation contemplated by this invention,

drawings depicting a preferred form have been annexed as a part of thisdisclosure, and in suchdrawings, like characters of reference denote corresponding parts throughoutallthe views, of which Figure 1 1s a sectional elevation of-- a I dynamo with related parts. 40

Fig.' 2. is a diagrammatic plan of electrical connections.

Fig. 3 is an end view of a switch member. Referring now to Fig. 1 of the drawings, there is'diagrammatically shown at 1 the fly wheel of an internal combustion engine 2, this .wheel being provided with a gear 3. Mounted adjacent the fly wheel is a dynamo, preferably an electric motor, the armature shaft 4 of which is provided with a pinion 5, adapted upon being moved endwise, as hereinafter described, to come into mesh It may here be noted that terms of the nature of gear are used in a broad sense to indicate any power trans- Speeification of was ilatent f atented Au '17, 1920.

apmnnfinma november 21', 1914. 'Seriai'No. 373,264.

mitting'connection whether of the frictional or.positive:type. i I

l [he armature 6- of the 'dynamo isno'rmally out of registry with the field magnet -7- andis provided with an-=elongated commutator 8 adapted to slide in operative relation to the brushes as the armature moves endwise.

The construction and-action "of the parts [bored out 'as' indicated at "9' to receive a spring 10 which' abuts againsta'post 11 in the dynamo head-12 'and'tends to throw the armature intothe normal position shown.

insulated therefrom, is a switch member best shown in FigI'B of the drawings. This member comprises a'connecting bar 18 at each end of which is a curved contact portion 19 adapted to coact with a mating contact member '20 in embracing the stationary contact posts hereinafter described. Members19 and 20'are preferably urged toward one another by connecting pins 21 and springs22. i

Mounted upon an innerhead. of the dynamo casing 2 3.and'insulated therefrom at 24 is a contact post 25 presenting a continuous contacting surface o'fsubstantiall'y tubular form. Likewise mounted upon this head, diametrically opposite, and insulated therefromat 26 is a similar post comprising the contacts 27 and 28 insulated one from another at 29, the. length of the insulating member 29 being less than the effective length of the'corresponding contact 19; it

being understood that these contact posts are embraced by the switch member shown in Fig. 3.

positioned at the neutral and' ele'ce trically connected in pairs, as shown in Fig.

2 of the drawings. Brushes 3 1 are in electrical connection by suitable conductors" with the contact member 28 and an auxiliary the pulling of the field magnets, the switch members 19 which normally bridge the contacts-215 and- 27 are moved-steadily toward the right in Fig. 1 of the drawings, until they firstlconnect contact 25= withcontacts 27 and 28 and thereafter, upoafurther movement, connect contact 25 with contact 28 only.

Referring now for. the electrical connections to Fig. 2 of the drawings, thcreis in,- dicatedht 34 a storage battery, the circuit of which leads first through a'spring-retracted switch 35 which may be ;controlled by a foot pedal ofanautomobile, From, this point'the circuit leads to the contact 25, and continues through contact 27am], resistance 33 to the auxiliary brush 32. Passing through thearmature from this displaced brush, the current traverses brushes- 30, the series field 36 of the motor, and returns to the battery.-. The winding-37 of the electromagnet on the dynamo head is bridged across the battery, as shown. A The action of theabove apparatus may be outlined as follows a Upon switch 35 being closed the current passes through the above circuit to. brush 32 "and returns to the battery through brushes 30 and field 36. The displaced position of brush 32 results in a marked inefiiciency of action of the armature windings due to causes outlined in my co-pending ap. plication above referred to. This action, in conjunction with the effect of resistance 33, results in a feeble torque or turning moment of the armature as the latter is drawn into registry with the field magnets and the gears 5 and 3 into mesh. During this move ment, however, the .upper contact 19, when it reaches contact 28 leads current to brushes 31 and 32 in parallel and upon leaving contact 27 it leads current to brushes 31 only which, being properly positioned, give-the dynamo its full torque for starting the en.- gine 2. Upon the engine being started and speeding up with an attendant increase in counter'electromotive force of the dynamo, the pull of the field magnets is weakened and spring 9 throws the gears out. of mesh. If switch 35 has meanwhile been opened, the collar 14 follows the armature returning the switch member 18 to normal position. If, however, switch 35 is held closed, the magnet 15 prevents the return of collar 14: until, the. circuit through the magnet is broken.v It is to be particularly noted that 1,349,870 BEST AVAILABLE coP "action, and thus a an 'inteiriipt'ed torque-as well as the chance of burning-the contacts isavoided, is also to be noted that the fr'equent sliding movements of the switch contacts tend to maintain them in a condition" of high electrical efficiency L lt will thus be that there is provided simple apparatus for attaining the objects of this inventiorn-; -,.1.- .1 1 e .As many changes. might be made. in, the ove constnucticmam asimeey apparently difierent embodiments might, be. made .of

his i vention; wi ho t departing rom, (the scope thereof, it is intendedahat, all teatures n ib dhi ow in t eaccbm en r ing drawings shall be interpreted-gas ;illus tr tireandnot n a. li t ng, a ise m l e pec v ly c rr ct d with sa brushes, 3 Source of. @ur smtamsmb r 9 1 wi w h sa ur aptsurr et @I' Q tact member adapted to, make sliding, contact withsaid first contacts and move from one. to the other; thereof; said contact, mom;-

ber vbeing electrical lyconnected. with said first member, and means zadaptedftogmoye said contact member! as the. motor started. 2. In apparatus. of the. classdescribed, in

combination, an electric motor provided with a brush upon the neutral point of its commutator, ,a brush circumferentially. offset from itsneutral points, a. .pairfof contacts respectively connected with said brushes, a source of current, amember connected with said,;s ource of current, a contact member adaptedto makesliding contact with saidfirst'contacts and move from one to the other thereof, said contact'memher. being electrically connected: with said first member, and meansadapted'to move said c0ntact;member as the motor is started, said contact ,member being shaped to connectthe twofirst con aCtS one: with another ringit m veme t r oi t th other thereof; ;f V l 3. Inapparatus of the class described, in combination, an internal combustion engine, a dynamo providedwith an-endWise slidable armature normally out of registry with its field magnets,-gearing positioned, between, said engine, and said dynamo adapted toform a, power transmittingconnection therebetween as said armature slides, a

brush upon the commutator of said dynamo substantially at a neutral point, a brush upon said commutator angularly offset from its neutral points, a source of current, a contact connected with said second brush, a contact connected with said first brush, a slidable contact member connected with said source of current and normally engaging said first contact, and means adapted as said armature slides to move said slidable member into engagement with said second contact.

4:. In apparatus of the class described, in

combination, an internal combustion engine,

a dynamo provided with an endwise slidable armature normally out of registry with 7 its field magnets, gearing positioned between said engine and said dynamo adapted to form a power transmitting connection therebetween as said armature slides, a brush upon said commutator angularly ofiset from its neutral points, a source of current, a stationary member adapted to be connected with said source or current, a second stationary contact member having contacts respectively connected with said second and said first brushes, a sliding bridge connecting my name, as attested by the two subscribing witnesses.

JOSEPH BIJUR.

Witnesses: y g

M. J. COOPER, R. S. Burn. 1

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