US968635A - Timer for gas-engines. - Google Patents

Description

BLM. ASLAKSON. TIMER FOR GAS ENGINES,

' APPLICATION IILED `0321214, w07. 968,635, d Patented Aug. 30, 1910.

3 SHEETS-*SHEET 1.

mlmmllmamwww B. M. ASLAKSON. TIMER FOR GAS ENGINES.

APPLICATION FILED 001214, 1907.

Patented .Aug. 30,1916.

s SHEETS-slum INVENTURI BY 1??!r l. AUQRN,

WITNESSES;

B. ASLAKSON.

TIMER FOR GAS ENGINES.

APPLICATION FILED oo'r.14, 1907.

Patented A11 g;30,'1910.

3 SHEETS-SHBBT a.

Wl-TN ESSES siurrnn M.4 AsLAKsoN, or SALEM, onto.-

- Tri/inn non Gas-ENGINES.

. T0012 (whom-it concern: A

Be it known that LBAXTER M. AsLA'KsoN,

a citizenof-the :United States,'and resident of Salenni-n-the countyof'Columbiana and State vof-.Ohio, have invented certain newand useful Improvements in Timers for Gas- Engines, of which the following is a specification."". V My invention relates to the electrical distributionof current by means of a timer, and the object'of my invention is to provide 'an improved device of this character which .may be governed automatically to 'advance- .or retard the'sparking inthe cylinder of a gas engine, and'also to provide means'whereby the several contacts may be independently adjusted. i

. My invention further comprehends the details of construction hereinafter set forth and claimed. I

Referring to the drawings which form.

part of this's'peciiication, Figure 1discloses -a .timer located on an engine adjacent to .the 'cylinder and controlled by a governor driven by the engine, and also shows the spark coil and wiring plan. F ig.' 2, is a vertical sectional view through the timer and supporting means. 3,-is a side'view with the cover removed, and one of the .terminals shown in section.

A, indicates the casing of the timer, which Ainthis case is provided with 'a hollow-shank A', on Whichis mounted a. collar B, movable relative toV said shank, and being divided at .B to form a clamp to hold it tightv in any A desired adjustmenton said shank, .so that the ernor C, by means of rod D.

E, indicates a section of the engine frame, to Which is bolted a. casting F, the exterior surface of which is cylindrical in form to serve as abearing for shank A. v- Extending longitudinally through the center of casting F, is a shaft G, having at one end means G', through the instrumentality of which shaft G, may be rotated on its axis. Mounted on the opposite end of shaft G, isA a disk g, on which is mounted a disk of insulating material H, such as hard rubber. Fastened to disk H, and inlaidl ,therein so that its outer surface will be flush with the surface of the said disk, is a metal strip I, which extends across the center of said disk, and one end of which is bent at a right angle to' form a latter and casing may be moved by the gov- Contact for the carbon brushes J. The strip I is secured to disk H by rivets K--K limitation med october 14, 1907. seria-1 N.,39'7,4.1o.f

specifiaao of Letters Patent. Patented Aug. 30, 1.9140.

L, indicates -a cylindrical carbon brush whichis held in a metal brush holder M, which 1s identical in structure with the holders for the brushes J, and interchangeable therewith. .The brush holder holding brush.

L, is insulated from the casing A by non- 'con'ducting Washers N and 'N, which -are clamped to' the casing by a nut O and. lock nut'O.

posts, and Pf indicate lock nuts therefor.

. P- P are metal washers which are secured I on the brush holder M, and serve as binding The springs Q, abut the ends of the brushes at one end-and screw plugs R at theiropposite. ends to effect 4propercontact between the brushes and the rotating switch I.l The casing plate A2 is removable and is secured to the main ,portion ofthe casing by screws 'which enter the holes a-a respect1vely,-in ears radially within the casing' atthe front edge thereof.. .The brush holders which hold the brushes J and are located on the rounded peripheryof the casing A,.are provided withins'u ating washers vS and' S: respectively which conform to the curvature of the casing and extend acrossian opening therein indica-ted by a. This opening -permits the on the casing relative to eachother to effect lthe relative advancement or retardation of the sparking'in'- the cylinders of the engine. The casing A .is normally filled with grease or a heavy oil to lubricate'the switch and parts.

positive side of the circuit will be from battery T', coil -T2- and along Wire T to the binding post of the brush L of the timer, and

continued 'by Wire T3, from the binding post of one of the brushes J, tothe device V which operates to create a lspark wit-hin the cylinder. The current is grounded in the engine,l by Wire T4 T5.

The letter -U- idicates the spark plug, which is connected with' the device -V-.'

It will be readily appreciated from the foregoing vthat the shaft G, rotated through its connection with the revolving part of the engine correspondingly rotates the disk H, which causes the circuit to be periodically established through the medium of the strip I and brushes J and L coacting therewith, the

establishment of the circuit through the switch and brushes eecting the spark formation Within the cylinder, as well under-` In operating with a low tension spark, thebrush holders tobe'independently adjusted speed of the governor above .the normal, the governor C, will operate to -raise the rod D, and eifect such partial turning of the casing A, relative to the disk H, as will result in a retardation of the spark formation. Similarly. the lowering of said rod due to a decreased speed will be to advance the time of sparking, the general eiiect being to maintain a high economy in the use of fueldue to the following: The reason for the governor control ot' the ignition as used on stationary engines running at a constant speed is as follows: W'ith a maximum load, I use a maximum strength of mixture and a maximum volume at the same time,l .also maximum compression. `lVhen" these three things occur-to-Wit: maximum volume, strength of mixture and compression, the flame in the combustion chamberpropagates fastest,hence the spark should be delayed or come rather late. On the other hand assuming that the load has dropped entirely ofil the engine so that it runs merely on the friction load, the mixture has become automatically as weak as possible consistent with its capability of being ignited. The volume admitted has been decreased due toI the throttling by thegovernor, with the also consequent diminution of the compression. IVith a low Vcompression the fiamepropagates slower and it is therefore necessary to give the gases more time to burn, hence requiring an earlier ignition which the, governor automatically takes 'care of.

Obviously', by loosening the collar B, on t-he arbor or sleeve A,.said collar will rotate on said arbor under the varying action .of the governor withoutoccasioning any variation in the timing of the spark formation.

Having thus described my invention, what I claim as new and desire to secure `by Letters Patent, is-

l. In a device of the character described, the combination with an oscillatively supported circular casing, a switch Within said casing, designed for rotation by an `engme and for constant connection at one side ot a circuit; a brush peripherally carried by said casing and circumferentially adjustable rel-Y ative to the same, said brush being for 1n.

termittent contact with the switch, an en` gine governor, and means for connecting the casing with the engine governor, whereby the latter can turn the casing to vary the timing of its'brush contact with the switch.

2. In a device of the character described, the combination with an oscillatively supported circular casing, a switch Within said casing, designed for rotation by an engine and for constant connection at one side of a circuit, brushes peripherally carried by said casing and circumferentially adjust-able relative to the sameand to each other, said brushes being tu' intermittent contact with the switch, ,an engine governor, and means for connecting the casing with the engine governor, whereby the'latter can turn the casing to vary the -timing of the contact of the brushes with the Switch.

In a device of the character described, the combination lwith an oscillatively supported circular casing, a switch within said casing designed for rotation by an engine and for constant connection at one side of'a circuit, an insulated brush holder peripherally carried by said casing and circumfer- 'entially adjustable relative to the same, a

brush yieldingly supported Within said brush holder and adapted for intermittent contact.. with the switch, an engine governor, and means for connecting the. casing with the engine governor, 4whereby thc latter can turn the casing to vary' the'timing of its -brush Contact with the switch.

`l. A timer for gas engines coniprising a disk formed from insulating material, and rotatably mounted on the frame of an enginel and having a shaft provided at one endwith an extension; a rotary member mounted on the said engine and rotated by the same, having suitable means for engaging the said 'extension in loose Contact therewith; contacting brushes, a metallic contact strip mounted on said disk to form a-iush surface in the path of said contact brushes and extending to'the center of said disk; a casing *rotatably mounted to inclose said disk and to niove. concentrically with said disk; an electric contact mounted in said casing to resten the metallic strip carried by said disk and in thel center of said disk: electric contacts mounted in the perip'her of saidv casing to bear on the Said disk at a point removed from the center and in the path of the said strip on said disk, said contacts be- -ing imlepemlently movable around the periphery of said casing: a collar mounted on .said casing. and adapted to be shifted thereon circumferentially and havingr means for being connected with the governor lof the engine to be moved thereby, and a governor adapted to operate .said timer.

Signed at Salem in the county of Columd biana and State of Ohio, this eighth day of (etober A. D. 1907.

BAXTER M. ASLKSO.

W'itnesses:

Fnaxi; M. Asi-inni', IV. G. HARD.

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