US1321710A

US1321710A - Spark-plug.

Info

Publication number: US1321710A
Application number: US28862019A
Authority: US
Inventors: Governor L Brewer
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-04-08
Filing date: 1919-04-08
Publication date: 1919-11-11
Anticipated expiration: 1936-11-11

Description

G. L`. BREWER.'l

' SPARK RLUG. APPLICATION FILED APR. 8..'1QI9. v 11,321,710. Patented Nov. 11,1919.

.l1 llllllllll V- tion throughfthe'spark. plugi; and Fig. 3 is it and the lower tubular. part of the sleeve.

To all-whmm 'of which thefollowing-is a speeification.

'base .2 projridgdfwit -by an inclinedshouler', and having upper end.

very thin.. Tlie'bottom end 8 of the sleeveis -beveled or inclined in' the reverse cylindrical, and it has -a cylindrical cover or MICHIGAN.

i'sranir-PLUG.

y. L. i -.tery or source of electricity. This bar elec; -Be it knwnthatffl, GOVE'RNR ""trode extends crosswise .under the end o 1 a citzen'off theUnited State'sfresiding at the glower electrode member 21, and'its mid Kent ,CityJnthe'` county of Kent.' and State dlepart is curved upwardly so as to forman of Michigan, havev invented certain new'. "ignition spark gap ,withthe end of the lower '6 0 and useful Improvements in Spark-Plugs, ,electrode member 21.' The spark-is fanshaped d is localized at' the middle part of Th'isinvention`re1ates '-to -sparkplugsfori-thecrossbar by this'construction.

'use -in 'connectionfwith' internal cmbustion nup'per plug 26 of insulatingmaterial i engines and other purposes; it'consists ls .prov1ded, and' has a circumferential 6 inzthe.novelfconstructiom and combination r 7grto'ine'27 atits middle'part. The' plug 26 of-th'e partshgregnafter fully dscribed and, 1s 1nserteil in the upper end portion ofthe claimed. Y .r1 6, and the top portion of the sleeve Inthe dra irigs, Eigure 1 is-a side view g iscjrlmped-gr bent into engagement with the. ofthe spark gplug. Eig. v2 is a. vertical sec-j grr 1i"ove 27- so asto hold the plug '26 in fplace.

upper plug 26'has ashoulder 23' at its a ian view of the same, from below.'` gflo'wer end."and a projection 29. A A.short he sparkfplug h sie tubi'ilaij.supportingY "sight tu'be 3010i glass or other transparent iff screwthreadedfporfmaterial is vinserted in the sleeve between tion' 3 for i cojncfting ittoth'e'- cylinder Ao f fthe-two 'plugs beforethe upper plug; is se- "le" the en'gine or etlfer object'to whichit is to: .ured in place, and is held in place between be attached; The 'upperfpaxft @f the base the shoulders'lf) and 28. The projections has. a chamber 4:* connectd' to the tubular^v 2 0 and 29 projectY a little into the'end por- '.,tions of this-siglit tube. By crimping or 'bending thethm upper end of the sleeve -80 the glass sighttube can'be secured in posi-,

A tubular sl'eeve` 6 is provided and has a tlon' without breaking it. Sight tubes arev screwthreaded lower end portion 7 which is' easlly -broken when-secured between screwscrewed into the upper part of the base; vthreaded portions. i The upper end portiom of 'this sleeve is tapered externally -so that its top edge is aninternally screwtheadedportion at its or is 'otherwise secured into the upper plug 26 so as `to be adjustable longitudinally in it, .and its lower' end-.=. forms a spark g'p'with -the .upper end of the lower electrode member .z 21. Sight openings 33 are formed onoppo- 90 site sides of the sleeve opposite this sparkgap so that the working of' the .devicemmb' l, bevisible. The upper end portion'. of'fthe" electrode member 32 projects from the'upper. .plug. 26, and is providedl with'a lock nut Q5 the collar'12 and the sleeve and the shoulder 34 and a clamping nut .35 for the wire L36' respectively, and the upper washer has a; which conducts the electricity to. the'i'ifgei? downwardly projecting flange 16 Whichjv fdffvd:The. 0tl1 e rele :tric,wileift overlaps the cylindrical part of the collar. .l nested with tli .base of the plug in th" usual The upper end portion 417 of the plug is 'direction to the shoulder 5 bnthe base.

A main plug 10 of insulatingmaterial 1s arranged in the base and sleeve;and 'it has an enlargement or. collar 12 which is aI-, ranged .in the chamber 4 between the end o f the sleeve land the shoulder on 'the

baser Washers

14 and 15 are 'interposed between or shield 18 of asbestos interposed between made of asbestos, or are lined with asbes t The upper end portion ofthe plughas a shoulder 19 and a` projection 20.v

The lower`electrode membe 21 is secured centrally in the plug 10 with'its ends projecting therefrom.' A bar 'electrode 24 is secured to the bottom end of the base, and is connected to one pole of any approved batsure inthe lower cylinder, and prevent.. the-12'4 An upper electrode member 32 is screwed f85 way to form acircuit through the device. 10 The washers '14.'and 15 are preferably" Theymake gas tight joints against the pres'f main plug lfrom getting chipped and brolen. '105. .The asbestos cylinder 18 also preserves the secured thereto', a, cylndrcul' liner of asbes-A tos in the lower part of the sleeve, a mai 4 plug'of. lnsulatmg material'secured between the buse and sleeve with its upperend pro- 5 jecting through the said liner, an upper plug ofinsulting material seured in the upper v end of the sleeve, and electrodes carried by the two said plugsl and forming araux-ilimjy spark gap. 'f *Y In testimony whereof I have axed my ,10'

signature. A

v GOVERNOR L. BREWER.