US1022642A - Low-tension sparking mechanism for gas-engines. - Google Patents

Description

APPLICATION FILED FEBJY, 1909.

Patented M0119, 1912.

/N VENTUR- MAM.

WI TNESSES ff j.. M

inarrnn stares narrar oracion HENRY J. Po-DLESK, or crircnoo, iLLinors.

LO'iV-TEN'SION SPARKING' MECHANISIVLFUR GAS-ENGINES.

I To all whom t may concern.'

Be it known that I, HENRY J. PoDLEsK, a `'citizen of the United States, residing in Chicago, county ofCook, and State of Illinois, have invented new and useful Improvements in Low-Tension Sparking Mechanism for Gas-Engines, of which the following is a clear, full, and exact description.i

The object of the present invention, broadly speaking, is to provide an improved possessing maximum mechanical efficiency, requiring small space and a small port through which the electrodes are introduced into the combustion chamber, and so de signed as' to reduce the cost of manufacture to a minimum.

Other objects and advantages of this invention will appear in the following specification and the accompanying drawings, in which:

Figure 1 is an elevation, partly sectional; Fig. 2 is a side elevation, showing the electrode actuating mechanism; Fig. 3 is another side elevation, showing the sparking or Contact members and the port through which the electrodes are introduced into the combustion chamber; Fig. i is a perspective, showing the packing face of the body or frame.

B is a body or frame, carrying the various parts; F is a machined face between which and asimilar face on the combustion chamber packing is placed to secure an air tight joint; 3 is a round lug secured to B,

preferably made integral with it, and eX- tending laterally from the face F, forms an.

extension of the bearing a, for the movable electrode M, which is shouldered at f, a seat face on extremity oflug 3; m is an arm integral with the electrode M, disposed at right angles thereto and carrying a. contact member, or point, 2, which is arranged. suitably to make contact with a similar contact member on the head 1 of the stationary, insulated electrode, or bolt, S.

8 is a round Counterbore, extending from face F into the body B and terminates in a seat face 9; 1 4 is a round perforation through the body B, coaxial with the counterbore 8; 7 is a sleeve inserted into the counterbore 8, seating on seat 9 thereof, and eX- tending laterally from the face F. The perforation in this sleeve 7 is coaxial with the perforation 14 and preferably of same Specification of Letters Patent.

Application filed February 17, 1%9.

lgatented Apr. 9, 1912. Serial No. 478,355.

l size, so as .to readily receive a bushing 6,

which should be' made of some non combustible insulating material.

insulating washers 5, are placed at each end of the insulatingl tube 6, thus affording complete insulation of the bolt S from the body B.

u is a nut by means of which the bolt S, thesleeve 7, tube 6, and washers 5, are all 'secured together and to the frame B; 10 is construction of said sparking mechanism, 2-

a metal washer protectingthe washer 5, beneath it, from the nut u; the nut .l 1s for securing the circuit wire to S.

rlhe sleeve 7 may be secured into frame byc, this latter being pinned .fast to electrode/,fr

M bypin d; the torsion spring 11, coiledl around sleeve l), has one of its ends engaged on pin y?A and the other on the striker arm "H, the spring acting to normally hold said striker arm H bearing on the pin p, which pin serves as a stop for the striker arm H; the torsion spring 12, coiled around sleeve c, has one of its ends enga ed on the striker arm H and the other en on a pin d, the spring acting to normally hold the projection L, of sleeve c, in Contact `with the striker arm H. The movable electrode M is pinned to the sleeve c in such relation that the Contact points 2 are separated about onesixteenth of an inch when the striker arm H and t-he sleeve c are in normal position, that is, arm H bearing against pin p and the projection 7L in contact with arm H.

The trip rod, or bar, T is so connected to some moving part of the engine that a reciprocating movement is imparted to it, in, operation, at suchperiod that the lip of this trip rod T, will actuate the striker arm H so that the Contact points are brought together and then separated at the proper period for ignition. that as the trip rod T is moved to the right, Fig. 2, the lip t will engage the striker arm It will. be apparent H, moving it to the right, turning the sleeve b clockwise; the movable electrode li/l, re-

-whieh is pinned fast to the electrode M.

`When the arm H has been moved to some such position as shown by the dotted lines, the lipl 15 will trip oit, or disengage the arm H, when this will be impelled back by the two springs ll and l2, and strike a'haminerlike blow to the projection L, thus making a practically instantaneous break .in the current that may be liowing through the con tact points 2, the spark resulting troni this quick break being a most etiieient one 'jor i vniting the combustible charges compressed in the eon'ibustion chamber oi a gas engine. n

It is well known that in the manufacture oit igniter mechanism, of the class herein described, much diieulty is experienced in machining the traine or body so as to secure efficient packing surfaces, seat surfaces -tor the movable electrode, ete., it being necessary, in the constructions now in use, to re sort to numerous and expensive machining operations to obtain goed. results. This especially true in such cases where the port through which these parts or' the body, or frame, carrying the electrodes, and the electrodes themselves are introduced into the combustion chamber, must be inade small, becauseot the small combustion chamber necessary to obtain the proper compression in small engines and further the high compression necessary in all sizes ot engines when alcohol is to be einliloyed as the il'uel. T he i gniter mechanism can, in such eases, be made smaller in size, but. then its component parts become too small to be durable, are easily broken, hence expensive in inaintenai'iee, and expensive to make. By employin@` niy construction,v it is possible to utilize. elec trodes, and hence other parts as well, ot a substantial size, and y t have the port through which the electrodes are inserted into the combustion chamber small size.

As will be appa rent', the body il can be properly machined at. very low cost by eniploying a cliucking turret lathe, prov with'a suitable tuniek which will g body, in the rough, so that the tiene. line. tor bearing; n coincides with center line the. lathe spindle; suitable tools are carried in the turret and in the cross slides to t'ace the packing tace F; the seat face f, to turn the lng 3, to bore and reain the liearing 7i, andto slightly groove or serrato the face if", all these operations in one set-ting. rThe remaiiiing operations are simple and cheap.

I prefer not to thread the sleeve 7 into the body B, but to hold it in by the' elec-- trede, orbolt, S, as shown in Fig. wand oi relatively v using asbestosfpaeking between the sleeve "7 and the seat 9; this not only makes an a'ir tight joint, at low cost, but also affords' 'a flexible or resilient oint upon which the eX- pansion and contraction of the electrode S, due to heating and cooling, is taken up, in-

stead of beingtaken up upon the Washers 5,., which are preferably of mica; the lite y of these washers is much prolonged and their etlieieney is much increased by this, as they are kept tightI at all times, wl'iether the igniter is hot or cold. lt not necessary to insulate the sleeve 7, though this can be done. l

I have described and shown the preferred form of the coi'istruetion in my invention.

l claim:

l. in sparking mechanism for gas engines, the combination of a traine having a packing 'lace and a lug` extending laterally trom said t'aee'and terminating in a seatt'ace, a cylindrical perforation through the lugand the traine and substantially at. right angles to the packing i''ace, a shouldered with the said second perforation, an insulatin;- sleeve erdending` through the perforation ot' said sleeve and through said second perforation. insulating washers at either end of the insulating sleeve, av bolt passino' through said washers and the .insulating sleeve and rigidly clamping said washers and said sleeves to the fraaie. a- Contact member on the end of the boltV extei'iding from the cylindrical sleeve, an arm secured to the end oi the rock shaft extending from the seat tace, and a econd contact. member secured to.said arm and adapted to make' intact with the first said contact member.

lei markingA iiieliai'iisin for gas en- `fine-s, the combination oli a :trame having a 'i ace and `a lng extending laterally ace and terminating in a Fal perforation through a eeuiiterbore at` a .troia the anu extending' from 'ice into the frame, a second pei i ouah the traine eti-axial with and o'l` smaller size than the counterbore, a sleeve extending into the eoimterbore and relatively lone` fr than the depth of the counterhore, a bolt passiig through the Sleeve and said coaxial perforation'and insulatably tred te e hotly, a movable shouli'leret .fatali cylindrical perforation, the sliouldr et the shaft sea ting on the seat tace on the lug, and an arm secured to the shouldered end of the shaft extending-lat.`

orally therefrom and adapted to make con- .tact with the head of said bolt.

3. In sparking mechanism for gas engines, the Combination of a frame having a packing face.; a lug` integral With said frame and extending laterally from and beyond the packing face and terminating in a .seat face, a perforation through the lug and through the frame, a shouldered shaft passing through said perforation and extending beyond the frame, the shoulder seating on the seat face, a sleeve provided with an arm and loosely mounted on said shaft; a stop securedto the frame and adapted to engage the arm of said sleeve; 'a spring connected to said arm and the frame and adapted to normally hold said arm against. said stop; a projection secured to said shaft and adapted to engage with said arm, a second spring adapted to normally hold the projection in engagement with said arm, means for act-uating said arm, a second perforation through the frame at a distance from first said perforation, a counterbore extending from said packing face into the frame and coaxial with and of larger diameter than said second perforation, a cylindrical sleeve Within and. longer than the depth of sha ft and adapted to make contact with that f end of the bolt projecting beyond said sleeve.

4. In sparking mechanism for gas engines, the combination of a frame having a packing face, a lug integral With the frame and extending laterally from said face and terminating in a seat face, a cylindrical perforation through the lug and the frame and/. at right angles to the seat face, a counter! bore at-a distance from the lug and extending from the packing faceinto the frame7 a second perforation through the frame eoaxial with and of relatively smaller size than the counterbore, and a perforated bushing extending and tting into the counterbore and projecting beyond the packing face.

In testimony whereof I have -signed my name to this specification in the presence of two subscribing witnesses.

HENRY J. PODLESAK.

litnesses CARRIE E. JORDAN, .TENNIE L. Fisxn.

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