US1993014A - Cylinder for internal combustion motors - Google Patents

Description

. March 1935. J. J. MASCUCH 1,993,014

CYLINDER FOR INTERNAL COMBUSTION MOTORS Filed June 9, 1932 I N V EN TOR. 0 055 Mmcucfl ATTORNEY s star orgies CYLINDER FGR ZINTERNAL CGDBUSTHQN MQ'EURS Joseph 3 Masciich, Newark, N J.

Application June 9, 1932, Serial No. 616,169

4 Claims. (ill. 123=Jl69- This invention relates to internal combustion of the cylinder of a motor, showing the spark plug and top shielding in elevation or plan;

When an internal combustion engine is oper- Figure 3 is a fragmentary view of a portion of ated certain electrical emanations are released the cylinder taken approximately on line 33 5 from the spark plugs. Where radio receiving of Figure 2, looking in the direction indicated 5 and sending equipmentis used in close proximity by the arrows, but showing the spark plug in to the internal combustion engine the electrical plan; and, emanations from the spark plugs interfere with Fi ure 4 is a fra mentary d ail in nl the operation of the radio equipment. This is Section through the flange of the shielding eleespecially true in aircraft use where the engine ment. 10

and the radio equipment are necessarily located Referring to t d a A designates gene?- in close proximity. In order to prevent such inally the cylinder wall and piston assembly of a terference with the radio equipment it is nec escommon form of internal combustion motor P sary to shield the spark plugs so as to ground Vided with cooling fins B and an opening C to reany electrical emanations which may lie released solve the screw-threaded end of a common form from the spark plugs. of spark plug D. Suitable electrical connections The object of the invention is to provide a means E are ma e to t Sp p D d it is S e ded for perfectly shielding the spark plug so that the on top by a suitable construction F, arranged to electrical emanations are grounded to the cylinder be d i position y a bail This Construceo wall, Where removable fittings are used there tion may be of any w l known form t p Z0 isatendency to leakage through the minute spaces ably Of a COIlStruCtiOn Such as Shown in y oetween the screw-threaded face of the fitting pending applications, serial 431,755, filed and the screw-threaded space of the opening S p m 1930, Serial 550,076, filed into where the spark plug is introduced, July 11, 1931, directed to radio shielding per se.

Therefore, one object of the invention is to Ihe cy i d head W811 A When it is Cast. is 25 provide a shielding element which is integral formed w a projecting W 5, p f a ly i with the wall of the cylinder so as to avoid any and Surrounding the Opening in t e W t0 possibility oi emanations from the spark plug r eiv h p rk pl D. Th outer n f the leaking outwardly from the motor so as to inter- W811 5 is 1 V d Withfin angular flange the so fere with radio receptivity. under face of which is provided with slots 7, which so A further object of the invention to provide m y be s at he tim h cylind r h or w such a shielding which is easy of construction A'is cast. The slots '2 are adapted to receive the and which requires aminimum of machining. hitilri'leitl Div-angular ends 3 0f t b G.

' A further object of the invention is to provide om the foregoing descrip it Will be Seen such an integral shielding element as will cothat the Shielding e em nt formed by the Wall 5 operate with the securing means of known forms be lflrOdllced at the time Of Costing e y of removable shielding for the top of th l der and no machine work or assemblage is necesand which will permit the easy application of the salty. The Shielding F is grounded to J top shielding to the integral shielding element and Outer e 0?? t W ll 5 a d ny ema a s not to retain the same against rotation by reason of the utilized r h xpl i o h l a f y 40 great vibration of the lfi'iOtGi',-Whi0i1 is excepgrounded 0 e motortionally pronounced in aviation engine practice. v thus y described e inventifln,

1 The invention consists of the construct-ion, comwhat is claimed as new and desired to be secured bination and arrangement of parts, as herein ilby Letters Patent is:

lustrated, described and claimed. 1. A radio shield. for spark plugs comprising 45 In the accompanying drawing, forming part the combination of a cylinder head having a cirhereof, is illustrated a form of embodiment of cular well formed thereon to surround a spark the invention, in which drawing similar reference plug, said Well having an inside diameter substancharacters designate corresponding parts, and in tially larger than a spark plug adapted to he reso which: ceived therein, a dielectric cap disposed over the Figure l is a longitudinal section through the well, said cap having formed thereon a dielectric wall of the cylinder of an internal combustion skirt adapted to extend into the well adjacent the motor showing the application of the invention; inner wall of the well and a metallic covering on Figure 2 is a vertical section taken approxithe cap in electrical contact with the well.

mately on line 2-=-2 of Figure 1 through the wall 2. A spark plug radio shield comprising the combination of a cylinder head provided with a spark plug opening, a cylindrical wall formed on said head as an integral part thereof around said spark plug opening, a dielectric cap disposed over the outer end oi said wall, said cap having a circular skirt adapted to surround the terminal end of a spark plug seating in said opening and a metallic covering on said cap in electrical contact with said wall.

' 3. A spark plug radio shield comprising, in combination, a well formed as an integral part of a cylinder and adapted to surround a spark plug and a shielding cap to cover said well and enclose a spark plug, said cap comprising a dielectric body having an axial bare to receive the upper end of a spark plug and a radial bore to tending into the well around a spark plug and 0 having an axial bore to receive the upper end of a spark plug and a radial bore to receive a spark plug conductor, contact means to connect a conductor with a spark plug and a metallic covering grounded to the well.

JOSEPH J. MASCUCH.

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