US1597445A - Protecting device for electric detonators - Google Patents

Protecting device for electric detonators Download PDF

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Publication number
US1597445A
US1597445A US63452A US6345225A US1597445A US 1597445 A US1597445 A US 1597445A US 63452 A US63452 A US 63452A US 6345225 A US6345225 A US 6345225A US 1597445 A US1597445 A US 1597445A
Authority
US
United States
Prior art keywords
wires
lead
clip
detonator
protecting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US63452A
Other languages
English (en)
Inventor
Harry L Grant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Powder Co
Original Assignee
Atlas Powder Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atlas Powder Co filed Critical Atlas Powder Co
Priority to US63452A priority Critical patent/US1597445A/en
Application granted granted Critical
Publication of US1597445A publication Critical patent/US1597445A/en
Priority to GB24666/26A priority patent/GB259945A/en
Priority to FR623262D priority patent/FR623262A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • F42B3/182—Safety initiators resistant to premature firing by static electricity or stray currents having shunting means

Definitions

  • This invention relates to a protecting device for electric detonators of. the character of that shown in my copending application, Serial No. 748,214, filed on Novemher 6, 1924. v
  • the protecting device of the present invention is intended to be applied to the lead in wires of electric detonators and to serve, while in position. to establish a short circuit between the two lead-in wires, so that any stray currents imposed upon the leadin wires, outwardly of the point of application of said device, may not find their way to the detonator and prematurely explode the same.
  • Fig. 1 is a plan view of a detonator having the short circuiting clip of the present invention applied thereto.
  • Fig. 2 is an enlarged perspective view of the short circuiting clip. 7
  • Fig. 3 is a sectional view upon line 3+3 2 of Fig. 2 and Fig. 4 is a rlongitudinal sectional view through the clip, parallelism with one of the lead-in wires.
  • the lead-in wires are insulated, as indicated at 9 and 10. for. some distance from the detonator and the ends of the leadin wires are left bare beyond the point where the insulation terminates, to adapt them for ready' application tothe firing cable, leading from a blasting machine.
  • a metallic clip of plate like form is bent upon itself and clipped into firm engagement with the lead-in wires, said clip lying adjacent the terminal ends of the insulation 9 and 10.
  • the insulation protects the leadin wires from the point of application of theclip body 5 to the detonator and if any stray current be accidentally imposed upon the lead-in wires 6 and 7, outwardly of the 19, 1925.
  • the clip will serve as a short circuiting connection between said wires to prevent the passage of such current to point 8, and to prevent the creation of a difference of potential between the lead wires inwardly of the point of application of the clip.
  • the clip may be formed of any suitable material. though I prefer to employ aluminum. However, lead, tin, zinc, copper, brass upon the wires is assured.
  • the device of the present invention is of utility at all times between the time of manufacture of the detonator and the time when the same is. actually exploded on the job but it is of particular utility when the detonator is being transported and while it is being handled about the work preliminary to the actual firing of'a chargef.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Installation Of Indoor Wiring (AREA)
US63452A 1925-10-19 1925-10-19 Protecting device for electric detonators Expired - Lifetime US1597445A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US63452A US1597445A (en) 1925-10-19 1925-10-19 Protecting device for electric detonators
GB24666/26A GB259945A (enrdf_load_stackoverflow) 1925-10-19 1926-10-05
FR623262D FR623262A (fr) 1925-10-19 1926-10-18 Dispositif de protection pour détonateurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63452A US1597445A (en) 1925-10-19 1925-10-19 Protecting device for electric detonators

Publications (1)

Publication Number Publication Date
US1597445A true US1597445A (en) 1926-08-24

Family

ID=22049281

Family Applications (1)

Application Number Title Priority Date Filing Date
US63452A Expired - Lifetime US1597445A (en) 1925-10-19 1925-10-19 Protecting device for electric detonators

Country Status (3)

Country Link
US (1) US1597445A (enrdf_load_stackoverflow)
FR (1) FR623262A (enrdf_load_stackoverflow)
GB (1) GB259945A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632389A (en) * 1949-09-13 1953-03-24 Atlas Powder Co Electric explosion initiator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632389A (en) * 1949-09-13 1953-03-24 Atlas Powder Co Electric explosion initiator

Also Published As

Publication number Publication date
FR623262A (fr) 1927-06-21
GB259945A (enrdf_load_stackoverflow) 1927-02-10

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