Electrical ignition apparatus

Claim 2

The invention as defined in claim 1, wherein said wire is formed in the nature of a helix.

Claim 3

Electrical ignition apparatus comprising: first and second spaced electrical conductors; an insulator block fixed around both of said conductors holding them in fixed and insulated positions relative to each other, said conductors both having portions projecting beyond one side of said means; a resistance wire ignitor having first and second ends conductively bonded to said first and second conductor projecting portions, respectively, said wire having an electrical resistivity substantially larger than that of either of said conductors; and a wind shield mounted on said block in a position extending around said ignitor, said shield having at least one opening therein to allow a combustible fuel to pass therethrough to a position contiguous to said ignitor, said block having approximately parallel opposite flat faces, said shield having a body and two leaf spring projections snap fit on said faces, respectively, said leaf spring projections being fixed relative to said body.

Claim 4

The invention as defined in claim 4, wherein said leaf spring projections are substantially flat, each of said faces having a boss on each side forming a channel, each channel having a taper and decreasing in width toward said ignitor, said leaf spring projections being positioned in said channels, respectively, said leaf spring projections having a taper to mate with its corresponding channel, said shield body portion being positioned contiguous to said bosses when said leaf spring projections are located contiguous to Said bosses so as to trap said shield on said block.

Claim 5

The invention as defined in claim 5, wherein said leaf spring projections fit contiguous to said block faces when said leaf spring projections are unstressed.

Claim 6

The invention as defined in claim 6, wherein said leaf spring projections are integral with said shield body.

Claim 7

The invention as defined in claim 7, wherein said shield body and said leaf spring projections are made of a single sheet metal stamping.

Claim 8

The invention as defined in claim 8, wherein said block has a mounting hole extending completely therethrough, each of said leaf spring projections having a hole therethrough positioned in alignment with said block hole.

Claim 9

Electrical ignition apparatus comprising: first and second spaced electrical conductors; means holding both of said conductors respectively in substantially fixed and insulated positions relative to each other and in substantially fixed positions relative to said means, each of said conductors having a portion projecting from said means; and an ignitor including a resistance wire having first and second ends conductively bonded at first and second respective points to said first and second conductor projecting portions, respectively, said wire being brittle and subject to breakage when it is subjected to moderate to low shock or other loads, said wire being made of a material having an electrical resistivity substantially larger than that of the material of which said conductors are made, at least the said portion of said first conductor having a part that has a cross section small enough, is made of a material, and has a yield point such that said wire will not exceed its rupture strength, i.e. will not break, when said first conductor is subjected to a shock load having a component normal thereto of a magnitude sufficiently large to cause a predetermined inelastic strain to be produced in the said part of the portion of said first conductor and to cause the part of the portion of said first conductor to exceed its elastic limit, i.e. to take a permanent plastic deformation of said predetermined magnitude, to take a permanent set, and to fail to recover its original shape, the energy absorbed by the part of said portion of said first conductor in exceeding its elastic limit reducing the energy transmitted to said wire via said first conductor and reducing the load upon said wire.

Claim 10

The invention as defined in claim 10, wherein said first and second conductor portions are longitudinal in shape, said means having a flat side, both of said conductor portions projecting from the same said flat side of said means in respective directions parallel to each other, the said second conductor portion having a part the same as that of said first conductor portion, said parts being spaced the same distance from the said flat side of said means, said parts including respective necked down pieces of the respective conductor portions of which said parts are respectively integral, said first and second conductor portions projecting the same distance from said means flat side, both of said parts being dead soft.

Claim 11

The invention as defined in claim 10, wherein the said portion of the said second conductor has a part similar to the part of the portion of said first conductor.

Claim 12

The invention as defined in claim 12, wherein said parts include respective necked down pieces of the respective conductor portions of which said parts are respectively integral.

Claim 13

The invention as defined in claim 13, wherein said first conductor has an approximately straight first partial length from the part of said first conductor portion to the said first point, said second conductor having an approximately straight second partial length from the part of said second conductor portion to the said second point; said first and second partial lengths being approximately parallel.

Claim 14

The invention as defined in claim 14, wherein both of said parts are respectively made of dead soft materials.

Claim 15

The invention as defined in claim 12, wherein said first conductor has an approximately straight first partial length from the part of said first conductor portion to the said first point, said second conductor having an approximately straight second partial length from the part of said second conductor portion to the said second point; said first and second partial lengths being approximately parallel.

Claim 16

The invention as defined in claim 16, wherein both of said parts are respectively made of dead soft materials.

Claim 17

The invention as defined in claim 12, wherein both of said parts are respectively made of dead soft materials.

Claim 18

The invention as defined in claim 18, wherein said parts include respective necked down pieces of the respective conductor portions of which said parts are respectively integral.

Claim 19

The invention as defined in claim 10, wherein the said part of said first conductor portion includes a necked down piece of said first conductor integral therewith.

Claim 20

The invention as defined in claim 20, wherein the said part of said first conductor portion is made of a dead soft material.

Claim 21

The invention as defined in claim 10, wherein the said part of said first conductor portion is made of a dead soft material.