GB1425378A - Protective circuit arrangement for band cutter machines - Google Patents

Protective circuit arrangement for band cutter machines

Info

Publication number
GB1425378A
GB1425378A GB2619573A GB2619573A GB1425378A GB 1425378 A GB1425378 A GB 1425378A GB 2619573 A GB2619573 A GB 2619573A GB 2619573 A GB2619573 A GB 2619573A GB 1425378 A GB1425378 A GB 1425378A
Authority
GB
United Kingdom
Prior art keywords
band
band cutter
motor
june
relay
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
GB2619573A
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.)
RIEDL oHG ADOLF
Original Assignee
RIEDL oHG ADOLF
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 RIEDL oHG ADOLF filed Critical RIEDL oHG ADOLF
Publication of GB1425378A publication Critical patent/GB1425378A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • B26D7/24—Safety devices specially adapted for cutting machines arranged to disable the operating means for the cutting member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

1425378 Machinery safety devices ADOLF RIEDL OHG 1 June 1973 [3 June 1972] 26195/73 Heading F2J [Also in Divisions G1 and H2] A protective arrangement for stopping a motor driven band cutter machine when an operator touches the moving bands which is electrically insulated from the rest of the machine has the band 5 connected as capacitance in a bridge circuit 3 which remains balanced during normal operation and which when unbalanced provides an output signal by which full braking of the band cutter is triggered. The bridge 3 which comprises a resistor R1, potentiometer R2, a capacitor C and the band 5 between contact rollers 12 is connected to the output of an oscillator circuit 2 (of 25 or 65 kHz) and supplies an amplifier circuit 4 feeding a relay R1. The relay R1 may control arrangements for interrupting the motor supply and operating'a brake (Figs. 3 and 4, not shown) or for reversing the motor and operating a brake (Figs. 5 and 6, not shown).
GB2619573A 1972-06-03 1973-06-01 Protective circuit arrangement for band cutter machines Expired GB1425378A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722227184 DE2227184C2 (en) 1972-06-03 1972-06-03 Protective circuit for cutting machines for flexible material to be cut

Publications (1)

Publication Number Publication Date
GB1425378A true GB1425378A (en) 1976-02-18

Family

ID=5846797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2619573A Expired GB1425378A (en) 1972-06-03 1973-06-01 Protective circuit arrangement for band cutter machines

Country Status (5)

Country Link
DE (1) DE2227184C2 (en)
FR (1) FR2187981B1 (en)
GB (1) GB1425378A (en)
IT (1) IT988922B (en)
SE (1) SE383283B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237348A (en) * 1989-10-26 1991-05-01 Townsend Engineering Co Safety device for machinery
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
CN107457835A (en) * 2017-09-12 2017-12-12 安徽理工大学 A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52157588U (en) * 1976-05-25 1977-11-30
DE3934662A1 (en) * 1989-10-18 1991-04-25 Gallenschuetz E Metallbau SAFETY CIRCUIT FOR ELECTRICALLY DRIVEN AND ELECTRICALLY BRAKE OR LOCKABLE FLYING MACHINES OR MACHINE PARTS
DE19501579A1 (en) * 1995-01-20 1996-07-25 Hessabi Iradj Safety device for electrically powered hand tools, in particular jigsaws and circular saws
DE102018215885A1 (en) * 2018-09-19 2020-03-19 Robert Bosch Gmbh Food slicer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829850A (en) * 1971-12-17 1974-08-13 Tyco Laboratories Inc Proximity detector
DE2421558A1 (en) * 1974-05-03 1975-11-13 Standard Elektrik Lorenz Ag RELAY SWITCHING, IN PARTICULAR FOR REMOTE INDICATION SYSTEMS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237348A (en) * 1989-10-26 1991-05-01 Townsend Engineering Co Safety device for machinery
GB2237348B (en) * 1989-10-26 1993-11-03 Townsend Engineering Co A meat skinning maching and method of stopping such
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
CN107457835A (en) * 2017-09-12 2017-12-12 安徽理工大学 A kind of automatically controlled protection bench saw and its control method based on capacitance touch principle

Also Published As

Publication number Publication date
DE2227184B1 (en) 1973-10-25
SE383283B (en) 1976-03-08
FR2187981A1 (en) 1974-01-18
IT988922B (en) 1975-04-30
FR2187981B1 (en) 1978-02-10
DE2227184C2 (en) 1976-08-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee