USRE14646E

USRE14646E - lehman

Info

Publication number: USRE14646E
Authority: US
Inventors: Joseph H. Lehman
Filing date: 1919-02-04
Publication date: 1919-05-13

Description

J. H. LEHMAN.

COMBINATION TIMER, DISTRIBUTEH. AND INDUCTION COIL APPARATUS.

APPLICATIOI IILEU ITB. 4. ISI?.

mvsnroR Bv .Z Z Av1-anniv 71T we l 1. H. LEHMAN. COMBINATION TIMER, DISTRIBUTER, AND INDUCTION COIL APPARATUS.

APPLICATION FILED FEB. 4. ISIS.

Reissued May 13, 1919.

m T N E V m ATTOR N EV primary and secondary windings rrlmry ymy invention 85 magnetized STATES PATENT OFFICE.'

roem or nasii'nouox insicura-nw maaar.

'COIBIIATION mi, DIBTBIIB'UTIB, AND INDQGTION-COL APPARATUS.

llmeiliiatioii ot leiuued Letters Patent. Reissued May 13, 1919.

` Original lo. 1,142,978, dated June 15, 1915, lerid lo. 785,807, iiled December 6, 1918. Application for reissue To all 'whom it may concern.;

Be it known that I, Josiiriry H. LninnN, a citizen of the United States, anda resident 1.0 Induction-Coil A paratus, of which the following is a speci cation.

My invention relates to improvements in electric spark producing apparatus, and is particularly adapted for use as a part of the 15 ignition apparatus for internal combustion en es.

n 'my improved apparatus I employ an induction coil having normally stationary and coniine in the same casing therewith and as a art of the same apparatus, a timer for making and breakin the primary circuit of the coil an a distributor to deliver the current induced in ,the secondary coil to the several spark plugs, or other ignition apparatus. As one novel and important feature of I make the inner or central art of the coil hollow and but slightly arger than a central shaft and mount on that 30 shaft outside of or without the plane of the4 coil, the movable parts of the timer or interrupter and the distributer. As another important feature of my invention I preferably make this shaft of metal capable of being and utilize it as the core of the induction coil. a further important feature of my invention I mount the condenser concentric with the induction coil, preferoutside of the secondary windings and v ablyl wit in the Imain outer casing of the apparatus. As a further important feature I make the central shaft of a tube split or cut lengthwise to prevent eddy currents forming e and containing softl iron wires to better ada tit to serve as Ithe electro-magnetic core of t e coil.

By means of 'comparativel in form, an

my invention, the device is of small diameter and compact the electrical connections between the timer, distributer, coil and condenser are permanently made within the casing of the :apparatus and not subject to derangement, grounding, loosemng by vibration, or incorrect attachment by the workled lem@ 1.910. Serial lo. 275,088.

man making the installation after the coniplate a paratus leaves the factory.

In t e accompanying drawings: I 1i igure 1 is a longitudinal cross section, with parts broken away, of one form of apparatus illustrating an application of my invention, the secondary coils being shown conventionally. l

Fig. 2 1s an end view thereof looking from the right-hand end of Figure 1, the clampy ing` rings being omitted.

ig. 3 is a section on the line 3-3 of Fig. 1, looking from right to left.

Fig. '4 is a section on the line 4 4 of Fig. 1, looking from right to left.

y Fig. is a longitudinal view partly broken away, illustrating the shaft Iextension or center of. the apparatus, and,

Fig. 6 is a cross section of the same on the line 6-6, looking -:from right to left.

In the specific form illustrated in the drawings, the numeral 7 indicates a shaft adaptted to be driven by the engine, which sha may be slotted transversely to receive the key 8, which projects from the head of a n ut 8. This is secured to the shaft extension 9 which serves as a combination electromagnetic core and timer and distributer shaft, by any suitable means, such as a screw 10. The key 8 being free to slide within the transverse cut at the end of the shaft allows for any necessary play when the engine driven shaft 7 and the shaft extension 9 of the apparatus are not in true alinement.v

. 11 and 12 indicate the 'base or support of the apparatus, the upper portions of the same comprising rings 12. The sections 11 and 12 may be drawn together to contract these rings by any suitable means, such as a screw 14. Two of these rings 12a with their corresponding base portions 11 and 12 are preferably employed adjacent to the opposite ends of the apparatus. The apparatus may be suitably fastened down upon the frame of the engine or upon any other support by an suitable means, such as bolts 18 .Interm iate of these rings, another ring 15 may be rigidly secured to the outer tube or casing 16 of the apparatus and this ring may be provided with a suitable projection 17, so as to facilitate the rotation of the apparatus within the bearings formed by the rings 12. This ring 15 may have its ends drawn together so -as to rigidly clamp the tube by'nieaiis of a screw 13.' By means of the projection 17 and the ring l5, the casing of t e device may be rotated at willi to advance or retard the spark as will be pointed' out hereinafter.

The outer covering or casing of the apparatus preferably comprises a cylinder 16 of suitable .insulating material, the rear end of which may -be capped or closed by the head section 19 ofsuitable material which may be secured, in any referred manner and which is provided with a central bore or bearing for the passage of the shaft ex-` tension 9. This shaft, in order that it may also serve as the electro-magnetic core of `the induction coil, comprises a bunch of soft iron wires 20, vsecured in parallel arrangement within ya suitable tube 21, which referably split or provided witha longiv is t'iidinal cut such as 22, to prevent eddy currents.

Upon the outside of the metallic tube 21 is preferably mounted an insulatin tube 23 o f fiber or other suitable materia but the shaftcomprising the wires and the tube 21. is free to rotate within this insulatin tube. Upon the insulating .tube 23 is pre erably wound, the primary coil 24 of the induction coil. Upon the primary coil are s ecured insulating tubes 25--25 upon which are secondary coils 65--66 and encircling these are insulating tubes 26-26. have shown two separate secondary coils arranged end to end with separate inner and outer insulating tubes 25-25, 26-26 .but such sub-dividing o f the secondary coils into sections is not an essential of my invention or construction. The ends of the secondary coils are shown as closed by suitable rings or annular collars 27. Encircling the tubes 26-26 is the condenserl 28, which in turn is encircled 'bythe outer sheath or covering 16. The primary and secondary coils andthe condenser as 'well as the insulation tubes above referred to are all rigidly connected; and carried by this outer sheath, covering,-or shell 16.

The front end of the outer casing 16, that is,.the end opposite to that through which the shaft enters, is closed by an insulating head, disk, or casing section 29 which is also provided with a'central bore or opening through which the end of the shaft extension 9 projects and for which it acts asia bearing. The ring or annular member 30 is suitably secured to the cylinder 16 and encircles the disk 29 and is provided with a cylindrical flange 'projecting beyond this disk. A detachable cap 34 is provided, said cap having a peripheral fiange adapted to be secured to the cylindrical flange of the ring 30. As a suitaJble securing means the ring 30 is shown as cutaway to form three

recesses

31, 32, and 33 and the cap 34 has 5 three projections adapted to enter these reto receivea nut 37.

cesses so that the peripheral wall of the cap may be inserted within the flange of the ringl -3O'and be rotated therein to bring the projections out of registry with the recesses and retain the cap in position.

The tube 21 of the shaft has a vpl'g or head 35 fitted into the end thereof and this lplug or head is provided with an axially extending rod or projection 36 sere-w threaded i Secured on this rod is a cam member 38 for the 'timer or interrupter of the primary circuit and a brush l carrier 39 for the distributer of the current from lthe secondary coil. These two members are secured on'the rod by the nut 37 against the end of the tube 21 or the head 35 ofthe latter -and are held against rotation in respect to the shaft by a suitable key, as forinstan, the pin 35. l

The distributer of the secondar or induced current includes a tube 40 o insulating material projecting from lthe face of the plate or disk'27 and within this tube is a contact brush 42 pressed endwise into opera-V tive position by a .spring 41 within the tube.

The spring itself may serve to carry the current from the secondary coil to the brush 42. The brush carrier 39 which is shown as `being made of insulating material, has secured to the inner or under surface thereof, a collector ring 43 with which the brush 42 is always in engagement so that the collector ring will always vbe electrically. connected to the secondary coil.V Secured to the outer surface of the distributer brush carrier 39 is the distributer brush 44 which is referably a resilient contact' member ellectrically connected to the col ector ring -43 in any Vsuitable manner, as for instance, by a securing screw.

The outer cap 34 has a series'of contact points and corresponding binding posts adapted to be connected with the spark plugs of the engine. VThese yare shown as four in number and designated as k45, 46,

'47, and 48. The four contact points are in provided with a contact point 51 adapted to contact with apoint 52 carried by a resilient arm 53 mounted on a pivot 54. 'The arm is rovided with an extension 55 having an insulated bearing face member 55 adapted to engage with the extended portions of the face o f the cam member 38. A resilient member 57 normally tends to kee the contact points 51, 52 apart and t e circuit broken but as the cam 38 rotates, its engagement with the projecting member '55,

ratus at a binding post 58 which is insulated' from the cap lretaining ring b suitable insulating material, such as 59. is bindingpost 1s suitably connected to the winding y,of the rimary c'oil b connections 60 as shown. fter leaving t e primary coil, the c'irrent p through the wire 61 to the terminal 50thence through the make andv break contact points 51, 52 of the timer or interrilpter, the arm 53, spring 57v and ring 30, `to the opposite bindin post 62 and thence back to the other si e of the battery or other source current.

One of the condenser 28 is connected to the terminal 50 by a conductor ,634 and the othe'rgside of the condenser is connected to the bindingpost 62 by a wire 64v which latter also serve to round the one endl of the secondary coil. us the condenser isconnected' across the break established by the separation of the contacts 51, 52.3.;1'When these `closed, a .current ilowsthrogh the rimary' windings and a current is induced in the secondary windings.y One end 'of this secondary; current isV unded, aspreviously stated, by the wlre 64 which. termi-- nates at the binding post 62, while the Iother end is conected'to the brush 42 b Asi, wire 67 and the sErin'g' 41. The indu current flows thi-bug the separate or windings 65, ,6615i the secondary coil and through the brush 42, collector ring 43, and d1stribuv ter brush' ,;44 to the'` contacts and binding 45 to 48 inclusive, from which bind-V ing sts,l the current is distributed to the spar plugs vwithin the cylinders and back to` roun ,nl

he distributer brush 44 is shown as being spacedbut a short distancefrom the nut 37 which latter is grounded. The'cap 34 has a central window or lassy 49 through which the nut and distri uter brush` are visible. .Should the current to one of the s ark plugs become broken or separated so that the*A spark plug is not in circuit, this fact willgbe readily indicated as the high tension secondary' currentinstead of owing to the terminal of the disconnected or inoperative spark plug will )ump from the distributor brush across the a to the nut 37. By noting this spark an `t e particular el distributer contact or binding post which is in engagement with the' distributer brush 44 at the instant of the spark, the particular spark lug which is out of commission may be re ily determined.

The cam 38 has a definite and predetermined position in respect to the englne crank shaft but the timer or interruptor contacts 51, 52 are mounted on the casing of the-apparatus. By rotating this casing, the spark may be advanced or retarded.` It is tobe un erstood that the screws 14 are not tightened' so tight but what the casing may be rotatedv within the bearing rings 12I but that the screw 13 is tightened so that the casing maybe rotated by the movement of the arm or projection 17. 0f course'it will be understood that various modifications may be made without departing from the spirit of the invention as claimed.

- I claim as my invention: l

.1. The combination with the primary and secondary windings of an induction coil, of a shaft rotatably mounted therein and serv'- ing as the electro-magnetic core of the induction coil and a circuit makin and breaking device for one of said windings andf including a movable part ada ted to be"`op erated by the rotation of sai shaft.

2. .In an ignition mechanism, the combina tion with an induction coil, and a casing therefor, of an interrupter and a distributer within said casing, the stationary inembers of said interruptor and said distributer being secured to said casing and the niovable members ofsaid devices -being rotatable without the plane ,of said coil, and a rotatable shaft within said coil for actuating the movable members of said nterrupter and said distributor. .f i

3. In an ignition mechanism, the combinavtion with an induction coil having a tubular Aopening and a -rotatable shaft extending within which said interrupter and distri uter are mounted outside of the coil, said I casing being rotatable on said shaft to ad vance or retard the spark.

5. In combination with an induction coil havin an electro-magnetic core movable inde n ently of the coils thereof comprising solle iron wireswith'm a metallic tube aving 18 a longitudinal cutaway portion, and a timer at one'end of said coil having lits rotatable member mounted uponsaid core. v

v6. In combination with an induction coil, a rotatable core therefor com rising soft iron wires within a metallicftu having'a longitudinal cut away portion, and a timer.

at one end Vof said coil having 4its rotatable member mounted upon said core, said coil having a central longitudinal passage for said core. i

7. In combination with a .stationary induction coil, `a rotatable core therefor comjrising soft iron wires withinv a metallic tube aving a longitudinal ycut away portion, a timer at one end of said stationary coil hav,-

its rotatable member `mounted upon said core, and a condenser concenrti'ioally mounted outside of the secondary windings of said coil. l

8. In combination with an induction coil, a rotatable core therefor com rising soft iron wires within a metallic tube having a longitudinal vcut away rtion, a circuit breaker in the primary circuit of said coil having a resilient arm maintaining said circuit normally open and means in combination with said rotatable core for closing said circuit through said resilient arm.

9. In combination with a stationary induction coil, a rotatable core therefor comprising soft iron wires within a.' metallic tube having a longitudinal cut aw circuit of said portion, a circuit breaker in the prima stationary coil having a resi ient arm maintaining said circuit normally open, means in combination with said rotatable core for closing said circuit through said resilient arm, and means for causing said resilient arm to open said circuit when it fails to act by itsown resiliency.

10. In combination with a stationar induction coil, a rotatable axially dispo central member therefor, a circuit breaker in the primary circuit of said stationary coil having a resilient arm maintaining said circuit normally o en, .means in combination withsaid rotata le member for closing said circuit through said resilientarm, and means for causing said resilient arm to open said circuit when it fails to act by its ownresilienc 11. ln an ignition mechanism, an induction coil including primary and secondary windings, a metallic shaft extending therethrough and projecting beyond the end of the coil, a casing for said coil including a peripheral wall, an end wall at one en d of the coil through which said shaft projects, and a removable cover spaced from andl substantially parallel to said end wall, a timer `winding includin ary coil, including an annular series of terminals on said cover, a rotatable member betweensaid Vend wall and said cover, a brush cari'ied by said member for distributing 'cooperation with said terminals, and'ine'ans fo;` connectin said brush and the secondary a brush and a collector ring, one, carried y said end wall and connected to said secondary coil and the other carried by said second mentioned rotatable, membery and connected to said first mentioned brush. y

12. In an ignition mechanism, an induction coil includin primary and secondary windings, a meta lic shaft co-axialtherewith, a casing having a section encircling said coil, a transversedisk through which said shaft projects'and a removable cover spaced from and substantially parallel to said disk, a timer for the primary coil including a pair of relatively movable contacts carried by said disk and a rotatable member carried by 'said shaft 4adjacent to the outer side of said disk, a distributer for the secondary coil including an annular series of terminals on said cover, a rotatable-member on said shaft between said first mentioned rotatable member and said cover, a brush carried by said secondV mentioned member for distributing coperation with said terminals, a contact ring on the under side of said second mentioned rotatable member and connected to said brush, a brush guide projecting through said disk, and a'brush therein connected to said secondary winding and engaging with saidring.

13. In an ignition mechanism, an induction coil includin primary and secondary windings, a meta lic shaft co-axial therewith, a casing having a section encircling said coil, a transverse disk through which said shaft projects and a removable cover spaced from and substantially parallel to said disk and a distributor for'the secondary coil including an annular series of terminals on said cover, ra rotatable member on said shaft between said disk and said cover, a brush carried by said rotatable member for dis- I tributing coperation with said terminals, a contact ring on said rotatable member and JOSEPH H. LEHMAN.