US3466014A - Switching actuator for a concrete vibrating tool - Google Patents

Switching actuator for a concrete vibrating tool Download PDF

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Publication number
US3466014A
US3466014A US597728A US3466014DA US3466014A US 3466014 A US3466014 A US 3466014A US 597728 A US597728 A US 597728A US 3466014D A US3466014D A US 3466014DA US 3466014 A US3466014 A US 3466014A
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United States
Prior art keywords
tool
switch
hose
concrete
concrete vibrating
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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
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US597728A
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English (en)
Inventor
Anton Pottgens
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Individual
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Individual
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/20—Switches having at least one liquid contact operated by tilting contact-liquid container
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08—Internal vibrators, e.g. needle vibrators

Definitions

  • Known concrete vibrating tools generally comprise a relatively long flexible tube or hose which also encases an electrical cable supplying power for the motor which drives the tool.
  • the concrete vibrating tool is connected to one end of this hose, and an electrical switch is provided at the other end of the hose to provide an electrical connection between the motor within the tool and an external power source.
  • at least two operators must be employed; one to operate the tool itself, and another to operate the electrical on-off switch.
  • the switch is located within the hose of the tool and is actuated by an actuating member which is also mounted in the hose, and which operates when the hose is placed in a reclining position, to thereby actuate the drive motor of the tool.
  • the actuating of the motor depends essentially on the inclined position of the hose.
  • a mercury switch is provided within the hose, wherein the mercury forms the actuating member.
  • the mercury within the switch is brought into contact with the stationary contacts of the switch, to actuate the motor and the tool.
  • the hollow chamber in which the mercury is disposed may be arranged in the form of a conical chamber having its wider portion disposed in the opposite direction of the tool. This wider portion of the conical chamber receives the mercury during the inoperative position of the tool.
  • FIG. 1 is a schematic view of a prior art concrete vibrating tool
  • FIG. 2 is a schematic view of a concrete vibrating tool according to this invention.
  • FIG. 3 is an enlarged sectional view of a switch in accordance with the invention.
  • a conventional concrete vibrating tool which comprises a cylindrical housing 1 in which a conventional electric motor 2 is disposed.
  • a flywheel 3 is mounted on a shaft 14 of motor 2 and a flexible tubing or hose 4, which serves as a handle, is secured to housing 1.
  • Hose 4 also serves as a casing for a cable 7.
  • an electric switch 5 is provided which connects cable 7 to a conventional threephase power source (not shown).
  • the distance between the concrete vibrating tool and the switch is generally 15 to 20 feet, so that usually two operators are required, one for handling the tool and the other for actuating and turning 015? the switch.
  • FIG. 2 illustrates a concrete vibrating device in accordance with the present invention. Elements shown in FIG, 2, similar to those shown in FIG. 1, are identified by the same reference characters as indicated in FIG. 1.
  • on-ofi switch 6 is located in the portion of the hose 4 which is nearest the tool housing 1. In other words, the switch 6 is located at the portion of the concrete vibrator tool which would be gripped by the operator during the operation of the tool. Switch 6 is completely enclosed by the hose 4, so that it is completely protected from dampness, dirt or other adverse external factors which would tend to damage the switch. Furthermore, since switch 6 is located within hose 4, it cannot become tangled within the iron casing, should the vibrating tool be inserted into a pillar.
  • FIG. 3 is an enlarged section view of the switch 6 in accordance with the invention.
  • a three-phase power cable 7 is embedded in hose 4 and connected to a suitable AC. power source (not shown).
  • Two conductors 15, 16 of cable 7 are permanently connected to phase conductors 8 by means of conductors 17 and 18 respectively, which are in turn connected to motor 2.
  • Two other conductors 19, 20 of cable 7 terminate at a pair of contacts 9 which extend into a conically shaped hollow chamber 10 formed within a switch housing 11.
  • Conductor 20 is also connected by means of a conductor 21 with a phase conductor 12 which leads to motor 2. As can be seen in FIG.
  • the conical hollow chamber 10 expands in the direction of the power source so that the wider end of the conical chamber is away from the housing 1, A quantity of mercury 13 is placed within hollow chamber 10. Due to the gravitational force exerted on mercury 13, the mercury will always stay in the deepest location of hollow chamber 10 when hose 4 is in the horizontal position shown in FIG. 3. Whenever hose 4 is lifted away from its horizontal position, that is, when the concrete vibrating tool is inserted into the concrete, the mercury 13 will move under the force of gravity to engage contacts 9 to complete the electric circuit between the power source and electric motor 2. In this manner motor 2 is automatically actuated.
  • the mercury 13 will flow back into hollow chamber 10, as shown in FIG. 3, to automatically interrupt the circuit between the power source and motor 2.
  • the hollow chamber 10 prefferably cylindrical instead of conical.
  • the cylindrical chamber would be provided with a suitably located annular recess for receiving the mercury 13 when the tool is in the horizontal or reclining position.
  • switches which would operate on the inclined position of hose 4 during the operating of the tool in the manner described above.
  • switches which are provided with a movable ball, a gliding contact pin, or the like may be utilized for this purpose.
  • a concrete vibrating means for use by a single operator comprising:
  • a conventional vibrating tool having a cylindrical housing, with an electrical motor disposed therein for driving a flywheel,
  • an electrical switch actuating means comprising a conically shaped hollow chamber contained within said hose portion, a set of contacts disposed within said hollow chamber, said contacts being directed away from the wider portion of said concially shaped hollow chamber, and a quantity of mercury arranged for liquid movement within said chamber for closing across said contacts, said quantity being stored in said Wire portion and remote of said contacts when the axis of said chamber is in a substantialy horizontal position, said switch means being positioned at a location remote from said vibrating tool and forming a connection between said motor and said electrical power source in response to the inclination of said hose portion containing said switch actuating means.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Measuring Volume Flow (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
US597728A 1965-12-06 1966-11-29 Switching actuator for a concrete vibrating tool Expired - Lifetime US3466014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP26352U DE1936231U (de) 1965-12-06 1965-12-06 Betonruettelflasche.

Publications (1)

Publication Number Publication Date
US3466014A true US3466014A (en) 1969-09-09

Family

ID=7370435

Family Applications (1)

Application Number Title Priority Date Filing Date
US597728A Expired - Lifetime US3466014A (en) 1965-12-06 1966-11-29 Switching actuator for a concrete vibrating tool

Country Status (4)

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US (1) US3466014A (en:Method)
CH (1) CH441099A (en:Method)
DE (1) DE1936231U (en:Method)
NL (1) NL6616047A (en:Method)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895197A (en) * 1974-02-19 1975-07-15 Sam Mizrahi Conducting fluid type inertia switch
US3903744A (en) * 1973-07-18 1975-09-09 Robert A Cone Electronic thermometer
US6619832B1 (en) * 1999-03-24 2003-09-16 Wacker Construction Equipment Ag Poker vibrator with frequency converter
US20040144188A1 (en) * 2001-05-17 2004-07-29 Michael Steffen Internal vibrator for concrete compacting
US20080012165A1 (en) * 1999-03-23 2008-01-17 Wacker Construction Equipment Ag Internal Vibrator with a Measuring System

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2007014114A (es) 2005-05-10 2008-03-14 Intermune Inc Derivados de piridona para modular el sistema de proteina cinasa activada por estres.
CN102099036B (zh) 2008-06-03 2015-05-27 英特芒尼公司 用于治疗炎性疾患和纤维化疾患的化合物和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1804017A (en) * 1926-05-01 1931-05-05 Gen Electric Vapor Lamp Co Mercury switch
US2093419A (en) * 1936-06-01 1937-09-21 Morris Goldstone Automatic switch for vacuum cleaners

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1804017A (en) * 1926-05-01 1931-05-05 Gen Electric Vapor Lamp Co Mercury switch
US2093419A (en) * 1936-06-01 1937-09-21 Morris Goldstone Automatic switch for vacuum cleaners

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903744A (en) * 1973-07-18 1975-09-09 Robert A Cone Electronic thermometer
US3895197A (en) * 1974-02-19 1975-07-15 Sam Mizrahi Conducting fluid type inertia switch
US20080012165A1 (en) * 1999-03-23 2008-01-17 Wacker Construction Equipment Ag Internal Vibrator with a Measuring System
US6619832B1 (en) * 1999-03-24 2003-09-16 Wacker Construction Equipment Ag Poker vibrator with frequency converter
US20030198123A1 (en) * 1999-03-24 2003-10-23 Wacker Construction Equipment Ag Poker vibrator with frequency transformer
US6733169B2 (en) * 1999-03-24 2004-05-11 Wacker Construction Equipment Ag Poker vibrator with frequency transformer
US20040144188A1 (en) * 2001-05-17 2004-07-29 Michael Steffen Internal vibrator for concrete compacting

Also Published As

Publication number Publication date
DE1936231U (de) 1966-04-07
CH441099A (de) 1967-07-31
NL6616047A (en:Method) 1967-06-07

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