I would like to know if anyone has looked at the diagram on page 116 and 117.
I don’t suspect that most of those of us who looked at the book have the intention of reading front to back. In my case it might be a long shot to say I would be reading it all, but I did find that even though the book looks to be scanned in, it had allowed me to use the find feature and did do a search for words within the pdf book version.
Searching for spark plug, found an unusual type of sparks plug with what I think has a movable part besides the anode electrical conduction.
On page 116 and 117 what looks like a pictorial diagram of a cylinder marked “A” in the above and “B” in the below diagrams from Figure 101, I want to know more about the function of the spark plug in “B”. (WIPE PLUG)
This seems to have much like a push rod connected to a cam to not loose compression, but continue through the center of the spark plug. It moves back and forth to make and break contact.
This is different that the above spark plug in “A” that is just like today’s modern spark plugs.
The small rod must have to keep the compression from leaking, just like the piston in the cylinder, but I can not quite think with rings to make the seal.
Then how is this done? Stuffing box. Pardon, but thats the details!
Wadds of high temp material? Who Knows?
The Wipe Plug?
Excerpt from Motor Bicycle Building, David A. Mckay Publisher 1906
http://www.archive.org/details/motor...buil00hasliala
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In B there is a wipe plug G, consisting of a
platinum-tipped rod and a platinum-faced spring.
The rod works in an insulated stuffing-box, and
its platinum tip is in contact with the spring
(connected to the cylinder) when the cam H presses
it into the cylinder. When the cam passes the tip
of this rod, a helical spring J pulls it sharply
away from the spring G, and, as the previous
contact of these parts closed the circuit of the
battery through the plain coil D2
, so this pullingaway
action breaks contact and a flashing spark
passes between the two separated parts at G. It
must be noted that this spark only flashes across
the gap between the separated parts at the moment
of separation, or, in other words,
"
at the
IGNITION COILS FOR MOTOR CYCLES. 117
break," but not the
" make "
of the circuit. This
must be taken into consideration when arranging
the timing of the ignition, by adjusting the wiping
cam. In A the sparking begins when the two
springs at F are brought into contact, and continues
whilst they are in contact; but in B there
is only one flash when contact is broken. Sure
ignition is ensured by the use of a compound coil
with trembler attachment, but the timing of the……….
What do you think?
Measure Twice
