GB512573A - Spark-timer for internal-combustion percussive hammers - Google Patents

Spark-timer for internal-combustion percussive hammers

Info

Publication number
GB512573A
GB512573A GB7902/38A GB790238A GB512573A GB 512573 A GB512573 A GB 512573A GB 7902/38 A GB7902/38 A GB 7902/38A GB 790238 A GB790238 A GB 790238A GB 512573 A GB512573 A GB 512573A
Authority
GB
United Kingdom
Prior art keywords
spark
timer
internal
ignition
piston
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
Application number
GB7902/38A
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.)
GAS TOOL PATENTS CORP
Original Assignee
GAS TOOL PATENTS CORP
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 GAS TOOL PATENTS CORP filed Critical GAS TOOL PATENTS CORP
Publication of GB512573A publication Critical patent/GB512573A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

512,573. Ignition arrangements for percussive tools. GAS TOOL PATENTS CORPORATION. March 14, 1938, No. 7902. Convention date, April 5, 1937. [Class 7 (iv)] Internal combustion percussive hammers with piston-actuated make-and-break contacts for the primary circuit of the ignition system are provided with means for adjusting the time of commencement and the duration of the ignition period. A spring-pressed plunger 29 presses into a cam in the side of the piston and its end co-operates to form a spark gap with a contact 34 adjustable in the end of the housing 38. Thermostatic means for adjusting its position and the duration of contact may be secured to the outer end of one of the contacts.
GB7902/38A 1937-04-05 1938-03-14 Spark-timer for internal-combustion percussive hammers Expired GB512573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US135185A US2163336A (en) 1937-04-05 1937-04-05 Spark timer for hammers

Publications (1)

Publication Number Publication Date
GB512573A true GB512573A (en) 1939-09-30

Family

ID=22466923

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7902/38A Expired GB512573A (en) 1937-04-05 1938-03-14 Spark-timer for internal-combustion percussive hammers

Country Status (3)

Country Link
US (1) US2163336A (en)
FR (1) FR835550A (en)
GB (1) GB512573A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442284A (en) * 1945-05-12 1948-05-25 Francis N Bard Spark timer for hammers

Also Published As

Publication number Publication date
FR835550A (en) 1938-12-23
US2163336A (en) 1939-06-20

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