US1807708A - rohlemann - Google Patents

rohlemann Download PDF

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Publication number
US1807708A
US1807708A US41449929A US1807708A US 1807708 A US1807708 A US 1807708A US 41449929 A US41449929 A US 41449929A US 1807708 A US1807708 A US 1807708A
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United States
Prior art keywords
potential
condensers
condenser
charging
time
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English (en)
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/06—Electric fuzes with time delay by electric circuitry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C17/00—Fuze-setting apparatus
    • F42C17/04—Fuze-setting apparatus for electric fuzes

Definitions

  • This invention relates to a process of and means'fortiming electric fuses having two oppositely connected condensers to furnish the ignition current.
  • the present invention accomplishes the same result by varying the charging potentials of the two condensers relatively to each other.
  • the invention provides, in electrical time igniting devices, which comprise two condensers connected in opposition and provided with means for mutual variation of the voltage of their charging energy, for adjusting the different times 0 ignition by varyingsthe charging voltage of the two condensers relatively to one another.
  • electrical time igniting devices which comprise two condensers connected in opposition and provided with means for mutual variation of the voltage of their charging energy, for adjusting the different times 0 ignition by varyingsthe charging voltage of the two condensers relatively to one another.
  • said current source being capable of simultaneously delivering two difierent voltages which are variable with respect to one another and of feeding a respective one of said volt-ages to each of the condensers respectively to charge the' same.
  • the new process and device present the advantages that all the required time periods can be provided for with a relatively low potential difference.
  • a charging potential difference of about 1000 volts, a maximum of only about 200 volts is suflicient with my invention, and this not only simplifies the battery or other source of current but also the structure and the insulation of the condensers 50 in general.
  • the charging apparatus for the two condensers is arranged to furnish two potential differences simultaneously, one at least of which is adjustable.
  • Figure l of the drawings shows the dlagram of connections of an electrical time ignitor together with the source ofcurrent belonging thereto;
  • Figs. 2 to 4 are diagrams showing curves I between potential and time, i.-'e.', the relation between the discharges of the two condensers for difierent time periods; in Fig. 2, the
  • the charging potential of the other condenser 3 is varied; and in Fig. 4, the charging potentials of both condensers are varied simultaneously.
  • FIG. 1 A is'the fuse and B the charging apparatus.
  • the two condensers e and f are connected in opposition to each other through a spark gap g, such as a tube containing a rare gas which allows the current to flow only at a potential of a predetermined minimum value, and an ignition medium h,
  • the condenser f is also shunted by a constant high resistance.
  • the chargingapparatus B is provided with three terminals I0 I0 and it and furnishes a constant potential between 70 and k the potential between 70 and k is variable, relah tively to the constant potential of I0 and k within such maximum and minimum limits that the difference of potential between 70 and I0 and between 70 and k always lies below the potential difference necessary to break down the spark gap g.
  • the constant potential difference between J0 and k serves to charge one of the ignition while the variable potential difkg and k is applied to the condenser 7, which is shunted by the resistance i.
  • the line R represents the; discharge of the condenser c after it is charged to the concondensers e,
  • the combined adjusting method obviates this disadvantage, by varying the charging potential of both condensers.
  • the charging apparatus B, Fig. 1 is then arranged to furnish a variable potential both between the terminals and h and between the terminals 70 and k .
  • Thetcondenser .f, Fig. 1 which discharges through the resistance z', is charged for a certain interval for short time periods with a potential Viz and for the remaining time periods with the potential V
  • This higher potential V then furnishes a sufliciently rapid discharge for the longer time periods, so that asatisfactory accuracy of the actual ignition time period is obtained.
  • the further adjustment within this restricted time period is then obtained by varying the charging potential of the second condenser e, so that the time period 2? is obtained with potential V and time period it, with potential V
  • the condenser f, shunted by the resistance 5 is first charged with the greater potential V and then the further adjustment is obtained by varying the second chargin potential, so thatthe time period t results rom potential V and time period t, from potential V8 I claim as my invention 1.
  • An electrical time ignition device com prising an electrical ignitingmeans, a spark gap, two condensers, a circuit connecting said condensers in oppositionto one another, and also including, in series therewith, the ignit ing means and the spark gap, a high resistance shunted across the terminals of one of said condensers, and a source of electricity capable of simultaneously delivering two different voltages, Variable with respect to one another, and connections whereby said voltages may be temporarily applied to the respective condensers to charge the same.
  • a method of adjusting the time of ignition of electric fuses which consists in charging two condensers to different voltages dependent upon the ignition time desired, maintaining one of the condensers at substantially itsfull charging voltage, partially discharging the other condenser at a rate determined by a constant resistance across its terminals, opposing the voltages of the two condensers to one another, and applying theprogressively sively increasing difierence of the said voltages to produce a discharge through a gap having a definite minimum break down voltage and through the fuse, in series with one another, causing said discharge to ignite the electric fuse at a definite time.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Elimination Of Static Electricity (AREA)
US41449929 1929-06-15 1929-12-16 rohlemann Expired - Lifetime US1807708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER78418D DE492222C (de) 1929-06-15 1929-06-15 Verfahren und Vorrichtung zur Tempierung elektrischer Zeitzuender mit zwei gegeneinandergeschalteten Kondensatoren als Zuendstromtraeger

Publications (1)

Publication Number Publication Date
US1807708A true US1807708A (en) 1931-06-02

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ID=7415788

Family Applications (1)

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US41449929 Expired - Lifetime US1807708A (en) 1929-06-15 1929-12-16 rohlemann

Country Status (7)

Country Link
US (1) US1807708A (enrdf_load_stackoverflow)
CH (1) CH145480A (enrdf_load_stackoverflow)
DE (1) DE492222C (enrdf_load_stackoverflow)
DK (1) DK44082C (enrdf_load_stackoverflow)
FR (1) FR692679A (enrdf_load_stackoverflow)
GB (1) GB335474A (enrdf_load_stackoverflow)
NL (1) NL27642C (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465351A (en) * 1943-03-26 1949-03-29 Standard Telephones Cables Ltd Projectile timing
US2514434A (en) * 1941-07-24 1950-07-11 Stephen L Windes Electrical detonator
US2545474A (en) * 1943-08-12 1951-03-20 Jerome J Kurland Delayed detonating means for projectiles
US2950400A (en) * 1942-03-30 1960-08-23 Itt Protective circuit for radio repeater
US3340811A (en) * 1966-05-20 1967-09-12 Avco Corp Piezoelectric delayed squib initiator
US3732823A (en) * 1967-07-06 1973-05-15 Bolkow Gmbh Electrical igniter or fuse
US3850100A (en) * 1943-08-28 1974-11-26 Us Navy Mine firing control system
US4033266A (en) * 1975-01-31 1977-07-05 General Electric Company Electrical fuze with selectable modes of operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961583A (en) * 1957-07-05 1960-11-22 Femco Inc Detonator circuit for permissive explosion shot firer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514434A (en) * 1941-07-24 1950-07-11 Stephen L Windes Electrical detonator
US2950400A (en) * 1942-03-30 1960-08-23 Itt Protective circuit for radio repeater
US2465351A (en) * 1943-03-26 1949-03-29 Standard Telephones Cables Ltd Projectile timing
US2545474A (en) * 1943-08-12 1951-03-20 Jerome J Kurland Delayed detonating means for projectiles
US3850100A (en) * 1943-08-28 1974-11-26 Us Navy Mine firing control system
US3340811A (en) * 1966-05-20 1967-09-12 Avco Corp Piezoelectric delayed squib initiator
US3732823A (en) * 1967-07-06 1973-05-15 Bolkow Gmbh Electrical igniter or fuse
US4033266A (en) * 1975-01-31 1977-07-05 General Electric Company Electrical fuze with selectable modes of operation

Also Published As

Publication number Publication date
GB335474A (en) 1930-09-25
FR692679A (fr) 1930-11-08
DE492222C (de) 1930-02-21
CH145480A (de) 1931-02-28
DK44082C (da) 1931-05-04
NL27642C (enrdf_load_stackoverflow) 1932-09-15

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