US1267984A - Igniter. - Google Patents

Description

F. H. DAVENPORT at H. H. MANNING.

IGNITER.

mmcmou mm )UNELL m4. 1 ,267,984. Patented May 28, 1918.

A 2 SHEETS-SHEET 1. 26 27 e8 5 0 z 22 24 F. H. DAVENPORT & H. H. MANNING.

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APPLICATION HLED1UNE22,I9|4- 1 ,267,984, Patented May 28, 1918;.

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ums M Q W/WC further object of the invention is actuated by a backward movement.

UNITED STATES PATENT OFFICE.

FREDERIG H. DAVENPORT AND HOWARD H. MANNING, OF MEADVILLE, PENNSYL- VANIA.

IGNITEB.

Specification of Letters Patent.

Patented May 28, 1918.

Application filed June 22, 1914] Serial No. 846,475.

To all whom it may concern Be it known that we, Fnnmuuoll. DA N- rcnr and l-lownnn ll. MANnmu, citizens of rho United States, residing at Meadvillc, in the county of Crawford and State of Pennsylvai'iin, have invented new and useful Improvements in Igniters, of which the following is a specification.

This invention relates to ignlters and consists in certain improvements in the construetion thereof as will be hereinafter fully described and pointed out in the claims.

One of the objects of the invention is to provide an igniler which is adapted for use both with a generator or storage batteries, and the ordinary dry battery.

7 Another object of the invention is to provide an igniter with an automatic means for advancing the spark with devices for controlling the maximumof the advance, A to provide a simple and efficient means for breaking the circuit to create the spark. A further object is to so form the igniter that it is' not Other objects of the invention together with the details of construction will appear from the description and claims.

The invention is illustrated in the accompanying drawings as follows Figure 1 shows a section on the line 11 in Fig. 2.

Fig. '2 shows a section on the line 2- 2 in Fig. 1.

Fig. 3 shows a plan view of the spark advancing weights and mechanism operating directly in connection therewith.

Fig. 4 is a plan view of the plate fonadjusting the maximum advance of the spark.

, Fig. 5 is s diagram of the igniter with the Wiring.

1 marks the driver. This is connected with the engine so as to rotate synchroiously with the engine. A sleeve 2 is journaled on the driver 1 and carries the head 3 of the ignitcr. The case 4 of the igniter is mounted on the head 3 being preferably so I cured by the spring clips 5 which snap over the lugs 6. The case and head are ordinarily made of insulating material.

*There are two fixed contacts 8 and mounted on the posts '7 and 9 respectively, f t-he posts extending through the head 3. The .movahle contact as shown in the form of a spring '11 is arranged between the fixed contacts 8 and 10 and is spring actuated by thgs spring 22 acting on an extension 11. T .e spring contact 11 is carried by the post 12 fixed on the head 3. The post 12 is connected by a. connection 12 with a, post 12' and a wire 12 leads to the ground 12 usually part of the engine frame. Condensers 19' and are arranged as commonly.

The primary coil 13 is connected by a. wire 14 with the ound or engine by the Wire 52. The other side of the coil 13 extends to a. switch 15, the switch being provided with the posts 16 and 17 connected with the wires 18 and 19 respectively. The wire 18 extends to the post 7 and the wire 19 to the post 9. The wire 18. extends through an ordinary (1 battery 20 while the wire 19'extends throng a generator or storage batte 21.

The spring contact 11 is normally in contact with the contact 10 and it is normally spaced from the contact 8. The mechanism is arranged so that when the igniter is operated the spring contact is momentarily swung out of contact with the post 9 and touches the contact 8 and then springs back. The effect of this is that if the switch 15 is on the' post 16 so that the primary coil is connected through the dry battery the connection is very short thus cconomizin in the battery in the wellknown manner. f, however, the switch 15 is on the post 17 the current is normally through the post 9 and the current is broken only of the igniter.

.We prefer to-utilizq a. hammer mechanism for operating the spring contact, 11, the

hammer bein of sufiicient mass to momentarily move t esprin contact 11 from the post 9 into contact wit 22 by its tension returning the contact 11 immediately to the contact 10. The hammer 92 is pivoted on a pin 23 extending into the base 3. It is subgected to the pull of the spring 22 extendlngfrom the hammer to the projection 11 otl'the spring qontact 11. An operating cam"2 is our-naled onthe driver 1. It is rovide with saw-tooth shaped calms he cam 24: is driven with with each operation t the post 8, the spring the driver and simply moves relatively to the driver to advance the spark.

The cam teeth 25 in their rotation contact the latch 26. The latch 26 is mounted on the hammer 22 by means of the stud 27. The

latch is limited in its movement in one dime.

tion by a pin 28 arranged on the hammer.

swung or rotat A spring 29 holds the latch normally in contact with the pin 28. In the normal opera tion of the device the latch remains fixed with relation to the hannncr and the hammer is lifted by each cam 25 as it passes under the latch and as it off the cam 25 the hammer is released delivering a blow to the spring contact 11 breaking the contact with the post 9 and making a mol'nentarg contact with the post 7. When, however, t e cam is driven in a reverse direction or backward, the latch 26 swings on the pivot 27 and, therefore, the hammer is not lifted and the ignitcr is not operated.

The mechanism for automatically advancing the spark is as follows. Pins 30 extend from the hub of the cam 24. These pins extend through slots 31 in a plate 32. Theplate 32 has the hub 33 fixed on the driver 1 by a pin 34. Centrifugal Weights 35 are pivotally mounted on the plate 32 by means of pins 36. The weights are provided with the lever arms 37 which engage the pins 30. As the weights swing outwardly under the influence of centrifugal force, the arms 37 operating on the pins 31 advancing the spark. The centrifugal element of this governing mechanism is furnished by the resistance to the outward movement of the hammer by the spring 22. This tends to move the cam or to retard the cam and this is opposed to the centrifugal action of the governor weights. The plate 38 is journaled on the driver 1 immediately below the plate 32. It has slots 39 corresponding to the slots 31. A screw 40 extends through a slot 42 in the plate 32 and into an arm 41 on the plate 38. The late 38 can, therefore be ed thus swinging the slots 39 relatively to the slots 31 so as to shorten the effective length of the slots 31. The effect of this is to limit the movement of the cam 24 and thus limit the maximum advance of the spark. This may be adjusted by moving the arm 41 and locked in adjustment by the screw .40.

In order to adapt the device to multiple cylinder engines, we provide the following mechanism :An insulated head 43 is moi1nted on the end of the driver 1. The plate 44 is carried by the head 43. A contact 45 is held in contact with the plate44by a spring 45, this being mounted on the hollow post 46. The distributing contact posts 47 are carried by the case 4. As shown there are four of thcsein the path of the contact 48, the contacts being spring pressed by the springs 49. It will be understood that the head 43 is rotated with the driver 1 carryin the contact 48 into contact with the distributing post 47 and the contact 48 completes the connection through the post 47. The connection is also completed by means of the plate 44 contact 45 through the post 46. The post 46 is connected by a wire 50 with a secondary coil 51. The secondary coil is grounded through the engine by a 'wire 52. The posts 4 are connected by wires 53 with the spark plugs 54 of the cy inders 55,

What we claim as new is y 1. In an igniter for explosive engines, the combination of a driver; a first fixed contact; a second fixed contact; a movable contact arranged between the two fixed contacts and normally inv contact with the first fixed contact; an means actuated by the driver for momentarily moving the movable con tact out of contact with the first fixed contact and into contact with the second fixed contact.

2. In an igniter for explosive en nes, the combination of a driver; a first xed contact; a second fixed contact; a movable contact normally in contact with the first fixed contact; a hammer arranged to operate on the movable contact and to actuate the same by the momentum of the hammer;

and means actuatedby the driver for actuating the hammer.

In an iguiter for explosive engines, the ,combination of a driver;

tact; a. second fixed contact; a spring contact arranged between'the fixed contacts and normally in contact with the first of said fixed contacts; and a hammer driven by the driver arranged to operate upon the spring contact to actuate the spring contact by the momentum of the hammer.

4. In an igniter for explosive engines, the combination of a driver; a fixed contact; a movable contact; a hammer actuati the movable contact by the momentum ifi the hammer; a cam actuated by the driver for operating said hammer; a spring actuating the hammer and resistin the movement 6 the hammer under the in uence of the earn; a centrifugal weight and a. connection tween the centrifugal weight and said cam whereby said cam is advanced by an outward movement of the centrifugal we gin: and theg eutward movement of the centrifugal weigiit is resisted by the retarding eiiect

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