US1978162A - Timer for internal combustion engines - Google Patents

Description

Oct. 23, 1934. J. F. MARTIN 1,978,152

TIMER FOR INTERNAL COMBUSTION ENGINES Filed Oct. 7, 1933 2 Sheets-Sheet 1 INVENTOR To/u; E 2 /8/77 ATTORNEY.

Oct-23, 1934. J F MARTW 1,978,162

TIMER FOR INTERNAL COMBUSTION ENGINES Filed Oct. 1933 2 Sheets-Sheet. 2

I BY g 13 57 ATTORNEY.

Patented Oct. 23, 1934 a i UNITED STATES PATENT OFFICE TIMER FOR INTERNAL COIIBUSTION ENGINES John F. Martin, Springfield, Mass assilnor to United American Bosch Corporation, Springfield, Mass., a corporation of New York Application October 7, 1933, Serial No. 692,593

6 Claims. (Cl. 123-148) My invention relates to timers for the ignition a conductor strip 12 embedded in a cap 13 for circuits of internal combustion engines. the casing and leading to a central brush 14 An object of this invention is to provide a timer onthe inside of this cap. This terminal 14 enwith a housing enclosing a low tension circuit gages a spring conductor 15 on the rotor 6, which 5 breaker and a distributor, and a cover for an igniis also of insulation and this rotor carries thereon tion coil secured on the casing; the entire cona brush orterminal 16. A rivet 17 embedded in struction being compact and simple, easy to asthe arm 18 of the rotor secures the conductor 15 semble and attach to the engine for which it is in contact with the brush 16 and aflixes both to intended, and inexpensive to produce. the rotor 6. Of course the cap 13 is of insulation.

10 The objects and advantages of the invention are The molded top ofinsulation 11 has a recess 19 set forth in the ensuing description, but I reserve, opening through its lower face, and the end of of course, the right to,make changes in details the conductor 4 is exposed at the bottom of this that do not depart from the spirit of the invention recess to be engaged by a spring-pressed brush or exceed the scope and meaning of the broad 20, ina socket embedded in the cap 13 and secured 15 terms in which the claims are expressed. to one end of the conductor 12.

rm the drawings: At 21 are shown fixed high tension terminals rig. 1 is an axial section through a timer accarried by the distributor casing 5 through which cording to my invention; the circuit is closed in turn by the brush 16. Figure 2 is a transverse section through a part These terminals extend through the casing 5 from 20 thereof showing the circuit breaker; the inside to the outside; being hollow at their Fig. 3 is a front view; outer ends and enclosed in hollow projections 22 Fig. 4 is a top view thereof; and on the casing 5 to receive the ends of the high Figs. 5 and 6 show details. tension terminals leading to the spark plugs.

The numeral 1 indicates a metal housing for The shaft 9 with driving key 10 carries a gov- 25 the timer of suitable material on the top of which ernor comprising a loose plate 23 and a fixed plate is a cover 2 containing the primary and secondary 24 between the breaker plate and the closed end windings of a high tension ignition coil, one termiof the housing. Attached to the plate 23 are govnal of the primary of this coil being connected ernor weights25 pivotally mounted on pins 26 to a suitable source of electrical energy associcarried by the plate 23. These governor weights 30 ated with the engine, and the other extremity of carry pins 27 which engage slots 28 of suitable the primary being connected to a terminal 3 by shape in the plate 24. The cam 8 is rigid with which it is joined to the interrupter or circuit the shiftable plate 23 so that when the speed inbreaker of the timer in the housing 1. Of the creases the cam is advanced with respect to the secondary coil, oneend will b grounded in the shaft 9.

35 usual way, and the other end will be joined to a The cover 2 is secured in place by screws 29 brush or suitable terminal 4 adjacent the base of passing through openings in the lower part 30 of the cover 2 to enable high tension current to be the cover 2 and top 11 into engagement with conducted to the distributor of the timer. The threaded bores in the top of the housing 1. Becasing of the distributor is shown at 5. This castween the cover 2 and the top 11 is a packing ring 40 ing 5 as well as the cover 2 will be preferably of 31 and the upper face of the top 11 is counterbored some suitable insulating material, and inside of slightly to receive a rim 32 on the cover 2. the casing 5 is the rotor 6 of the timer. The sup- The top of the housing 1 has an extension 33 on porting plate for the circuit breaker is shown at which the molded element 11 rests and the top 7 in the housing 1 and it has a pair of contacts, of the housing has an opening 34 to give passage 45 one fixed and the other movable; the latter to be to the terminal 3. The front end of the housing 1 actuated by a cam 8 on a shaft 9 in the housing is open but receives a disk 35 which fits against 1 so as to open the circuit of the timer at each aninside shoulder 36. The rim of the casing 5 instant of ignition. The shaft 9 is mounted in enters this end of the housing and abuts the disk 2. suitable bearing in the bottom or rear wall of 35. This disk has a keyway 37 in its periphery 50 the in 1 and is adapted to be onnected by which engages a projection 38 in the housing and means of a tongue 10 at its Outer end an D the casing 5 has a projection 39 which also enters ating shaft of the engine to rotate the cam 8 and this keyway and enables the casing 5 to be fitted rotor 6. The high tension terminal4is embedded to the housing 1 in central position with the in a molded top 11 between the housing 1 and the sockets 22 at each side of the timer. The sup- 55 bottom of the coil cover 2. It is connected with porting plate 7 for the interrupter fits against a shoulder 40 between the governor and the disk 35 and has an opening to give clearance to the cam 8. This plate 7 is held against the shoulder 40 by a spring ring 41 which is received in an inside groove in the housing 1.

The plate 7 has secured to the face thereof by one or more rivets a piece of insulation 42. At 43 is an interrupter lever preferably of metal having a contact at one end and mounted between its ends on a pivot stud 44 afllxed to the plate '7. Adjacent the other end is the usual rubbing block to be engaged by the earn 8 and at 45 is a spring which 'is affixed to said other extremity of the lever 43 and to the insulation 42, the lower end of the terminal 3 being connected to this spring. A terminal on the end of the lever 43 engages a fixed terminal 46. Preferably the lever 43 is insulated from its pivot stud 44 and the fixed terminal 46 is grounded on the plate 'I. Then the primary circuit is opened whenever the cam 8 moves the lever 43 to disengage its contact from the contact 46.

At the side of the housing 1 adjacent the plate 7 is an opening 47 which is closed by a curved strip of metal 48 on the outside of the housing. One end of this strip passes through an opening 49 and engages the inner face of the housing and the other end is made fast by a screw 50. When the screw 50 is taken out, the opening 47 can be uncovered for inspection and repair of the circuit breaker.

The housing 1 has at the closed end thereof a flange 51 with openings for mounting screws. The molded top 11 has a socket 52 to receive a condenser 53 and at 54 is a conductor united to the insulated pole of the condenser to be properly connected to the same terminal of the primary winding that leads to the circuit breaker and thus bridge the breaker contacts. The molded top 11 has a projection 55 in which is located the recess 19 and the cap 13 may have a thickened portion 56 in which the strip 12 is embedded. At 57 are spring clips pivoted to the sides of the housing 1 in position to engage the cap 13 and hold this cap in place.

The lower end of the supporting plate 7 may have a notch therein to receive the inturned end of an adjuster plate 58 which passes through an opening 59 in the bottom of the housing 1. This element 58 holds the plate 7 in a position of fine adjustment. It is punched to provide a pivot 60 which fits into an opening 61 to enable the inturned end of this element 58 to be turned somewhat in the recess 59 and it is held fast by means of a screw 62. This screw passes through an enlarged opening in the element 58 so that the element can be moved sidewise with respect to this screw 62 and locked in desired position. Said opening is indicated at 63 in the form of a slot in the element 58 and the inturned end of this element engaging the timer plate is indicated at 64.

The coil 65 in the cover 2 comprises primary and secondary windings with insulating pieces 66 at the ends and a central laminated core consisting of strips of magnetic material 67. This core is substantially parallel to the top 11. At its ends the strips are bent laterally towards each side of the coil against the insulating pieces 66.

At 68 is an insulating tube which may rest on the top 11 and support the core and coil. The inside of the cover 2 may have a shoulder 69 which engages the outer ends of the core, and holds the coil between it and the tube 68. The insulation pieces 66 of course are perforated to let the ends of the laminations of core 67 go through them before bending.

Having described the invention what is claimed is:

1. A timer comprising a housing, a top of molded insulation on the housing, a coil on said top, a cover for the coil, a distributor casing mounted on the housing, a cap for said casing, embedded conductors in the top and the cap to convey current from the coil to the distributor casing, said top having a recess, and the cap having a projection to enter said recess, the ends of said conductors being in engagement within said recess.

2. A timer comprising a housing, a circuit breaker plate within the housing, an adjuster element on said housing, said element being pivoted to the exterior of the housing, said housing having an opening through which an end of the element projects, the circuit breaker plate having a recess receiving said end, said element having a transverse slot therein between said end and the pivot point and a fastening bolt engaging the housing and passing through said slot. 3. A timer comprising a housing, a circuit breaker plate therein, and an adjusting element pivotally mounted on the housing to maintain the plate in desired position, said element having a pivot punched therefrom and an overturned end to engage said plate, and a transverse slot therein to give passage to a fastening bolt.

4. A timer comprising a housing, a shaft having a bearing in one end of the housing, circuit breaking means encircling said shaft, a distributor casing at the opposite end of the housing, a bearing disk in the housing between the distributor casing and the circuit breaking means, said disk having a key-way, a projection carried by the housing to engage the key-way and a projection on the distributor casing to enter said key-way.

5. A timer comprising a housing, a molded insulating top on the housing, a coil on the top, a distributor casing on the housing, said casing having a projection to enter a key-way carried by a part of the housing, to hold the casing in proper position, a cap for the casing, circuit breaking means in the housing, and enclosed connections leading from the coil to the circuit breaking means and the distributor casing, said connections comprising conductors embedded in the top and cap.

6. A timer comprising a housing, a top of molded insulation on said housing, a coil on said top, a distributor casing, a hollow projection extending laterally from said top and having a downwardly opening recess, a conductor embedded in said top having an exposed part within said projection, and conducting means projecting into contact .with said exposed portion and connected to said distributor.

JOHN F. MARTIN.

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