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GB407330A - Improvements in spring hammers - Google Patents

Improvements in spring hammers

Info

Publication number
GB407330A
GB407330A GB1722033A GB1722033A GB407330A GB 407330 A GB407330 A GB 407330A GB 1722033 A GB1722033 A GB 1722033A GB 1722033 A GB1722033 A GB 1722033A GB 407330 A GB407330 A GB 407330A
Authority
GB
United Kingdom
Prior art keywords
ram
crank
tool
box
spring
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
GB1722033A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1722033A priority Critical patent/GB407330A/en
Publication of GB407330A publication Critical patent/GB407330A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/26—Drives for riveting machines; Transmission means therefor operated by rotary drive, e.g. by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

407,330. Spring hammers. MEISSNER, F. E., 36, Avenue de la RochetaillÚe, St.- Etienne, Loire, France. Aug. 2, 1932, No. 17220/33. Divided application. [Class 124.] Spring hammer comprises a box 7 guided by surfaces 9 in the front part 8 of the casing and reciprocated by a crank 5 driven by a flexible shaft through gearing 2, 3. A ram 21 is mounted between springs 18, 19 in the box 7 ; an inwardly turned sleeve 13 on the casing is divided into four bars 24 which pass through the flange of the ram to guide the latter ; beads 29 on the ram minimise friction with the box 7 and exclude dirt. A tool 27 is removably mounted in the sleeve 13. In order to eliminate recoil, the following relation between the elastic and kinematic characteristics of the hammer pasts and the rebound ratio is satisfied, viz.:- where # is the rebound ratio of the ram on the tool, obtained by experiment, r is the radius of the crank, xa is the stroke of the ram between its neutral position at no-load and its position at the moment of impact with the tool, # is the angular velocity of the crank, and # is the angular speed of an imaginary point moving along an imaginary circumference so that its projection on a straight line would have the same vibratory movement as the free end of the spring means. # is equal to #K/m where K is the constant of the elastic system, i.e. the force necessary to move the ram through unit distance against the resistance of the springs, and m being the effective mass of the parts participating in the oscillation. Reference has been directed by the Comptroller to Specification 391,099.
GB1722033A 1932-08-02 1932-08-02 Improvements in spring hammers Expired GB407330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1722033A GB407330A (en) 1932-08-02 1932-08-02 Improvements in spring hammers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1722033A GB407330A (en) 1932-08-02 1932-08-02 Improvements in spring hammers

Publications (1)

Publication Number Publication Date
GB407330A true GB407330A (en) 1934-03-02

Family

ID=10091341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1722033A Expired GB407330A (en) 1932-08-02 1932-08-02 Improvements in spring hammers

Country Status (1)

Country Link
GB (1) GB407330A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047830A1 (en) * 2000-12-11 2002-06-20 Ab Vibrator Aps A device unit for generating a reciprocating driving motion for driving movable machine elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047830A1 (en) * 2000-12-11 2002-06-20 Ab Vibrator Aps A device unit for generating a reciprocating driving motion for driving movable machine elements

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