US3215864A - Switch controlled circuit for energizing an electric load for no more than a single cycle - Google Patents

Switch controlled circuit for energizing an electric load for no more than a single cycle Download PDF

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Publication number
US3215864A
US3215864A US416670A US41667064A US3215864A US 3215864 A US3215864 A US 3215864A US 416670 A US416670 A US 416670A US 41667064 A US41667064 A US 41667064A US 3215864 A US3215864 A US 3215864A
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United States
Prior art keywords
circuit
alternating current
current potential
tool
winding
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US416670A
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English (en)
Inventor
Richard H Doyle
Le Roy N Hermann
Joseph S Naber
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Black and Decker Inc
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Duo Fast Corp
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Filing date
Publication date
Priority to NL287218D priority Critical patent/NL287218A/xx
Priority to NL137795D priority patent/NL137795C/xx
Priority to BE626414A priority patent/BE626414A/xx
Priority claimed from US161727A external-priority patent/US3179866A/en
Priority to GB28337/64A priority patent/GB1008414A/en
Priority to FR919540A priority patent/FR1343241A/fr
Priority to GB48335/62A priority patent/GB1008412A/en
Priority to DEF38650A priority patent/DE1175352B/de
Priority to US416670A priority patent/US3215864A/en
Application filed by Duo Fast Corp filed Critical Duo Fast Corp
Application granted granted Critical
Publication of US3215864A publication Critical patent/US3215864A/en
Priority to SE13369/66A priority patent/SE305849B/xx
Assigned to BLACK & DECKER, INC. reassignment BLACK & DECKER, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DUO-FAST CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Definitions

  • This invention relates to a portable tool and, more particularly, to a self-contained tool in which all of the components for controlling the electrical operation of the tool are carried on the tool.
  • This application is a division of the copending application of Richard H. Doyle et al., Serial No. 161,727, filed December 22, 1961.
  • One common expedient used in designing portable tools is to provide a device in which the work is performed in a series of power strokes so that the power required in any given one of the operations is greatly reduced.
  • This approach is embodied in the use of rotating or reciprocating pneumatic and electric motors to apply increments of energy over an extended period of time.
  • some of the types of operations performed by the tools described above are such that they should be completed in a single power stroke.
  • it is much more desirable to drive a staple or nail and to punch an opening in a single operation rather than to apply repeated blows to the crown or head of the staple, nail or punch element.
  • the use of electrically operated tools over the extended periods of time required by repetitive power stroke operation presents the substantial problem of dissipating the heat due to the losses in the tool so as to keep the temperature of the tool low enough for manual use.
  • An electrically operated tool of the single power stroke type would have the advantage that electric power is almost universally available and can be used as an energy Patented Nov. 2, 1965 ice source at a nominal cost.
  • One approach to providing an electrically operated tool having a single power stroke is to use a rotating electric motor to compress a spring that is subsequently released to drive the work engaging portion of the tool.
  • the springs are subject to fatigue and the weight of the motor and linkage for stressing and releasing the spring often makes the tool unwieldly for manual operation.
  • the driving force for actuating the tool is derived from an electromagnetically induced field acting on a magnetic member forming a part of the drive mechanism.
  • one object of the present invention is to provide a new and improved electrically operated portable tool.
  • Another object is to provide a portable tool including new and improved means for supplying electrical energy thereto.
  • a further object is to provide an electrically operated tool that is self-contained so as to be capable of easymanual operation.
  • Another object is to provide a selfcontained and electrically operated portable tool which does not require energy storing means and which is capable of delivering a large amount of output power.
  • Another object is to provide a portable tool of the single power stroke type including control means: for supplying all the necessary operating energy during no more than a single cycle of an alternating current potential.
  • Another object is to provide a tool including a control circuit actuated by manually operable switch means for supplying operating energy to the tool for no more than a single cycle of an alternating current potential.
  • Another object is to provide a control or operating circuit for a tool in which a manually actuated switch selects a single cycle or less of alternating current energy for operating the tool.
  • one embodiment of the invention comprises an electrically operated stapler or tacker comprising a portable, lightweight housing having a chamber in which an operating winding is disposed.
  • a work engaging element such as a driver blade, is provided with a magnetic portion disposed adjacent the operating winding.
  • the portable tool is connected to a source of commercially available alternating current potential by a flexible cable and includes a control circuit carried completely on or within the housing and connected between the cable and the winding.
  • This control circuit includes a manually actuated switch means carried on the housing that is eifective, when actuated, to select the first complete half cycle of the alternating current potential following the time at which the switch is actuated for energizing the winding to operate the tacker or stapler.
  • the control circuit includes a controlled conduction device, such as a gated silicon rectifier, connected in series with the operating winding and an alternating current potential source.
  • the gate or control electrode of the controlled conduction device is selectively connected to a source of gating current under the control of the manually actuated switch through a second controlled conduction means.
  • This second controlled conduction means is placed in a conductive state to place the gated rectifier in a conductive condition at the beginning of and for only the first positive-going half cycle of the alternating current potential that occurs following the manual actuation of the switch means.
  • the operating winding is energized from the power source for only a part of a cycle of the input alternating current potential and is provided with an operating current of relatively large amplitude to deliver a large amount of power to the workpiece.
  • the need for energy storing components, such as capacitors is obviated with the result that all of the control components can be carried on the tool to provide a self-contained portable tool. Because of the extremely short duration that the operating winding is energized, the problem of excessive heating of the tool is obviated.
  • PEG. 1 is an elevational view in partial section of a portable tool embodying the present invention.
  • FIG. 2 is a circuit diagram of the controlled energy supply circuit included in the tool.
  • FIG. 1 of the drawing therein is shown a portable and electrically operated stapler or nailer, indicated generally as 10, which embodies the present invention.
  • the tacker includes a non-magnetic housing 12 having a vertically extending forward head portion 12a defining a chamber 14 and a rearwardly extending hollow handle portion 12b defining a cavity or chamber 16.
  • An operating winding 18 having a low resistance is disposed in the lower end of the chamber 14 and includes an axially extending opening 20 in which is received the lower end of a magnetic plunger or core 22.
  • a fastener driving blade 24 is secured to the lower end of the magnetic plunger 22 and is adapted to engage and drive a fastener, such as a staple or nail, supplied by a magazine assembly indicated generally as 26.
  • a tension spring 28 connected between the core 22 and the housing 12 resiliently returns the core 22 and the connected driver blade 24 to a normal position at the end of a cycle of operation.
  • a flexible cable 30 is connected between a conventional source of 60 cycle alternating current potential and a control circuit, indicated generally as 32, that is carried on the tool 10 and disposed within the chamber 16 in the hollow handle 12b.
  • the control circuit 32 is connected to the winding 18 and to a manually actuated switch 34 which is also disposed within the chamber 16 and which is actuated by a pivotally mounted trigger 36.
  • the control circuit 32 selects the first complete and properly polarized half cycle of the alternating current potential supplied over the cable 30 following the actuation of the switch means 34 and connects the winding 18 to the alternating current potential during this half cycle so that a relatively heavy current flows through the winding 18 for the duration of this half cycle.
  • the duration of the current flow through the winding 18 will be extended beyond a half cycle in some applications because of the inductance of the winding 18.
  • the energization of the winding 18 by this pulse of high energy and short duration produces a flux field that acts on the magnetic core 22 to drive the blade 24 downwardly to engage and set a fastener.
  • the construction shown in FIG. 1 is similar to that of the electrically operated tacker shown and described in detail in the contemporaneously filed application of Richard H. Doyle et al., Serial No. 161,651, now United States Patent No. 3,141,171, which application is assigned to the same assignee as the present application.
  • This construction has been modified to permit the control circuit 32 to be mounted directly on the housing 12 of the tacker 10 so as to provide a completely self-contained tool 10 that is both portable and capable of supplying adequate power to perform a fastener driving operation.
  • the control circuit 32 can be formed in any desired physical form, but preferably is formed on a suitable supporting means and then potted in one of the many well known compositions therefor.
  • the upper wall of the handle portion 12b is provided with a removable closure element or plate 38 that is normally secured in position by removable fasteners (not shown) to close an opening 40.
  • the control circuit 32 can be removed through the opening 40 and a replacement circuit inserted therein. This replacement of the control circuit 32 is facilitated by using detachable electrical connectors to interconnect the circuit 32 with the other components of the portable tool 10.
  • control circuit 32 is provided with a plurality of connectors or terminals 42 connected to the components in the circuit.
  • the housing 12 for the tool 10 and the housing for the switch means 34 are provided with a plurality of electrical connectors 44 that are insulated from electric contact with the housing 12.
  • the two terminals 42 at the right end (FIG. 1) of the control circuit 32 engage two connectors 44 connected to the cable 30 to provide means for energizing the circuit 32.
  • the two connectors 44 on the switch 34 engage two terminals 42 at the left end of the circuit 32 to connect the switch means 34 with the control circuit 32, and the remaining two terminals 42 on the circuit 32 engage a pair of connectors 44 connected to a cable 46 to connect the control circuit 32 with the winding 18.
  • FIG. 2 of the drawing illustrates the details of one control circuit 32 that can be used to control the operation of the tool 10 or the energization of the winding 18.
  • the circuit 32 controls the conductivity of a controlled conduction device, such as a gated silicon rectifier 60, to connect the winding 18 in series with the alternating current supplied over the conductors of the cable 30 for only the first positive-going half cycle of the input voltage occurring following the manual actuation of the switch means 34.
  • a rheostat 62 connected in series with one of the conductors of the cable 30 limits the current that can flow through the winding 18, and, thus, controls the energy supplied to the tool 10 during the half cycle in which the gated rectifier is in a conduction condition.
  • the rheostat 62 can be mounted on the handle portion 12b of the housing 12 (FIG. 1) and includes a manually actuated dial or knob 64 for adjusting the setting of the rheostat 62. This rheostat is connected in series between one of the electrical connectors 44 and one of the conductors of the cable 30.
  • the charge on the capacitors 74 and 77 discharges slightly through the shunting resistor 76 and the collector-emitter circuit of a transistor 78 that is biased just above its cutoif point. However, whenever the charge on the capacitors 74 and 77 drops below the desired value, these capacitors are recharged through the diode 72 during the next following positive-going half cycle of the input voltage.
  • a differentiating network including a capacitor 80 and a resistance element 82 are connected across the resistance element 70.
  • the leading and trailing edges of the positive-going and basically square wave generated across the resistance element 70 during the positive-going cycles of input potential are differentiated to provide positive-going and negative-going pulses, respectively, which are coupled directly to the base electrode of the transistor 78.
  • the positive-going pulses corresponding to the leading edges of the square wave occurring at the beginning of each positive-going halt cycle of the input alternating current signal increase conduction through the transistor 78.
  • This transistor operates as an emitter follower with current amplification so that each positive-going input pulse applied to its base provides a corresponding positive-going output pulse across an emitter resistor 84-.
  • This positive-going output pulse tends to drive a gate current through the gate electrode of a controlled conduction device, such as a gated silicon rectifier 86, the anode of which is connected to the capacitors 74 and 77.
  • a controlled conduction device such as a gated silicon rectifier 86, the anode of which is connected to the capacitors 74 and 77.
  • the cathode of the rectifier 86 is connected to an open circuit at a pair of normally open contacts 345 included in the switch means 34.
  • the rectifier 86 normally cannot be placed in a conductive state.
  • the control circuit 32 remains in this condition until the swtich means 34 is operated.
  • the trigger 36 is actuated to operate the switching means 34.
  • the operation of the switching means 34 closes the normally open contacts 34b and opens the normally closed contacts 34a.
  • the opening of the contacts 34a interrupts the charging path for the capacitor 77 and disconnects the collector electrode of the transistor 78 and the anode of the controlled rectifier 36 from all potential sources except that provided by the charged capacitor 77.
  • the closure of the contacts 34b connects the cathode of the controlled rectifier 86 to the control electrode of the gated rectifier 60.
  • the gated rectifier 86 is not placed in a conductive condition at this time unless the alternating current potential supplied by the cable 30 is at the beginning of a positive-going halt cycle. This is true because an input signal is not provided at the base electrode of the transistor 78 at any other time.
  • the differentiating network including the capacitor 80 and the resistance element 32 supplies a positive-going pulse to the base of the transistor '78 so that this transistor is placed in a heavily conducting condition producing a positivegoing potential drop across the emitter resistance element 84.
  • the drop across the resistance element 84 places the gate electrode of the controlled rectifier 86 at a positive potential relative to its cathode and places the gated rectifier 86 in a conductive condition so that the capacitor 77 now discharges through the conductive transistor 78 and the gated rectifier 36 into the gate or control electrode of the gated rectifier 60 through the closed contacts 3412.
  • the rectifier 60 At the end of the positive half cycle, the rectifier 60 lacks a proper potential across its cathode-anode circuit, and the rectifier 60 is restored to a nonconductive condition. If the switch means 34 remains in an operating condition at the beginning of the next positive-going half cycle of the applied alternating current potential, a positive-going pulse is again applied to the base of the transister 78. This positive-going pulse is not effective to initiate another period of conduction through the gated rectifier 60 because the charge on the capacitor 77 has been depleted and the components 78 and 86 lack collector and anode potential.
  • any further conduction through the gated rectifier 86 is prevented by opening the circuit to its cathode at the contacts 34b, and the charging circuit for the capacitor 77 is established at the closed contacts 34a so that this capacitor is charged from the capacitor 74- and the alternating current potential supply.
  • the control circuit 32 is conditioned for another cycle of operation.
  • control circuit 32 makes possible the portable tool 10 which is electrically operated and which is completely self-contained in requiring a connection to only a conventional source of alternating current potential.
  • the gated rectifier 60 can be placed in a conductive condition for only one positive-going half cycle of the input signal following each manual actuation of the switch means 34, excessive heating of the winding 18 and the tool 10 is avoided while providing adequate power to drive the blade 24.
  • control circuit 32 can be fabricated with components of many different values and types in ac cordance with the desired circuit application, one control circuit 32 using the following listed components supplied the Winding 18 with an operating current of between 40 and 120 peak amperes persisting for a duration of around 8% milliseconds.
  • Resistor 66 10K Resistor 66 10K.
  • Diode 68 Sarkes-Tarzian 2P4. Resistor 7t 10K.
  • Diode 72 Sarkes-Tarzian 2P4.
  • Capacitor 74 100 ,ufd.
  • Resistor 76 2.2K.
  • Transistor 78 2N1304 or 2N2l3.
  • Capacitor 80 0.1 ,ufd.
  • Resistor 82 22K is Resistor 82 22K.
  • Resistor 84 2.2K.
  • a control circuit for a portable tool winding means for operating said tool, an alternating current potential source, a unidirectional controlled conduction means having a control electrode, circuit means connecting said winding means and said controlled conduction means in series with said potential source, switch means operable at random times relative to the cycles of said alternating current potential, and control means controlled by said switch means for applying a signal to said control electrode to place said controlled conduction means in a conductive state during the first properly poled half cycle of said alternating current potential occurring after the operation of said switch means, said control means including means for preventing the application of a signal to the control electrode after said first 7 cycle and until the switch means is released and reoperated.
  • a control circuit for a portable tool an alternating current potential source, load means, a controlled conduction device connected in series with said potential source and said load means, said device having a control electrode, control means for applying a control signal to said control electrode to place said controlled conduction device in a conductive condition to connect said load means to said potential source, manually operable switching means operable at random times relative to the cycles of the alternating current potential, and a control circuit connected to said control means and said switching means and operable in response to the actuation of said switching means to control said control means to place said controlled conduction device in a conductive state for a portion of only the cycle of the alternating current potential following the operation of said switching means.
  • a control circuit for a portable tool an alternating current potential source, a winding, a first controlled conduction device connected in series with said winding and said potential source, said first controlled conduction device having a control electrode, a second controlled conduction device connected to said control electrode for controlling the conduction of said first controlled conduction device, energy storing means connected to said second controlled conduction device for storing a quantity of electrical energy sufficient to maintain said second device in conductive condition for less than one cycle of said alternating current potential, means for supplying an operating signal to said second device at the beginning of each cycle of said alternating current potential, charging means energized by the potential source, and manual switch means operable at random times relative to the cycles of the alternating current potential for connecting and disconnecting the energy storing means and the charging means.
  • a control circuit for a portable tool an alternating current potential source, a winding, a first unidirectional controlled conduction device connected in series With said winding and said potential source, said first controlled conduction device having a control electrode, a second unidirectional controlled conduction device operable to supply a signal at the beginning of each cycle of the alternating current potential capable of placing said first device in a conductive state, switching means operable at random times relative to the alternating current potential, and circuit means including said switching means and responsive to operation of the switching means for rendering said second controlled conduction device effective to supply said signal to the control electrode of said first controlled conduction device, said circuit means being operable following the operation of said switching means to prevent the application of additional signals to said control electrode until the switching means has been released and reoperated.
  • a controlled energy supplying circuit comprising load means, an alternating current potential source, a controlled conduction means having a control electrode, circuit means connecting said load means and said controlled conduction means in series with said potential source, capacitive means operative between substantially discharged and charged energy states to provide a current flow for controlling the development of a conduction initiating signal for the control electrode, and switching means for preparing circuit means for changing the energy state of the capacitive means to control the development of the conduction initiating signal for said control electrode to place said controlled conduction means in a conductive state for no more than one cycle of the alternating current potential, said switching means including first switch means manually operable at random times relative to the alternating current when the controlled conduction means is to be rendered conductive and second signal responsive switch means supplied with a signal for each cycle of said alternating current potential.
  • said second switch means includes a controlled conduction means having a control element, and which includes a network for coupling the alternating current potential source to said control element.
  • a circuit for supplying a single energizing signal to a load from an alternating current potential source comprising a gated rectifier having a cathode, an anode, and a gate electrode; circuit means connecting the potential source in series with the winding and the cathode-anode circuit of the gated rectifier; and a control network for supplying a single firing signal to the gate electrode, said control network including a controlled conduction device including a control electrode, means energized by the alternating current potential source for supplying the control electrode with a firing signal once during each cycle of the alternating current potential, a capacitor operable between discharged and charged states under the control of the controlled conduction device, and manually operable switch means operable to an actuated condition at random times relative to the cycles of the alternating current potential and operable to control the controlled conduction device and the capacitor to supply a single firing signal to the gate electrode at the first full cycle of the alternating current potential occurring after the operation of the manually operable switch means, the change in the state of the capacitor preventing
  • the manually operable switch means includes a first pair of normally closed contacts and a second pair of normally open contacts, the second contact being closed when the switch means is operated to an actuated state to render the controlled conduction device and the capacitor eflFective to deliver the firing signal to the gate electrode and to change the state of the capacitor, the first pair of contacts being closed when the switch means is released to restore the capacitor to its normal state.
  • a control circuit for supplying a single pulse of energy from an alternating current potential source to a winding comprising a rectifier unit having a gate electrode, circuit means connecting the winding in series with the potential source through the rectifier unit, a capacitor adapted to be placed at two different energy levels by charging and discharging currents, a manually actuated switch means operable to an actuated state at random times relative to the cycles of the alternating current potential and normally in a released state, a first circuit completed by the switch means in its released state placing the capacitor in a normal one of its two energy states, a controlled conduction device having a control electrode, means energized by the potential source for supplying a firing signal to the control electrode during each cycle of the alternating current potential source, and second circuit means completed by the switch means in its actuated state for placing the controlled conduction device and the capacitor in a circuit for placing the capacitor in the other one of its energy states when a firing signal is next applied to the control electrode of the controlled conduction device, the transition of the capacitor between its normal and other energy
  • a control circuit for supplying a single pulse of energy from an alternating current potential source to a winding comprising a gated rectifier unit having gate, cathode, and anode electrodes; circuit means connecting the winding in series with the potential source through cathode-anode path of the rectifier unit; a capacitor adapted to be placed at two different energy levels by charging and discharging currents; a manually actuated switch means operable to an actuated state at random times relative to the cycles of the alternating current potential and normally in a released state; a first circuit completed by the switch means in its released state placing the capacitor in a normal one of its two energy states; and a second circuit controlled by the switch means in its actuated state for coupling the capacitor in the gate-cathode path of the gated rectifier unit for placing the capacitor in the other one of its energy states, the transition of the capacitor between its normal and other energy state providing a single firing signal to the gate electrode to place the gated rectifier unit in conduction during the properly poled half cycle of the
  • a manually controlled circuit for supplying a single pulse of energy to a load from an alternating current potential source comprising a controlled unidirectional conduction means having a control electrode, circuit means connecting the load and said controlled conduction means in series with the potential source, a signal generating circuit coupled to the control electrode for supplying a single conduction initiating signal to the control electrode during only a single cycle of the alternating current potential, signal responsive switch means in the signal generating circuit for controlling the application of the conduction initiating signal to the control electrode and supplied with an enabling signal from the alternating current potential source during the portion of each cycle of the alternating current potential in which the potential is of a polarity to permit conduction through the unidirectional conduction means, capacitive means in the signal generating circuit operable between substantially charged and discharged energy states, manual switch means in the signal generating circuit operable from a normal.
  • circuit means in the signal generating circuit controlled by the manual switch means in its actuated position for changing tht normal energy state of the capacitive means and for rendering the signal responsive switch means effective to deliver a single conduction initiating signal to the control electrode when the cyclically recurring enabling signal is received, said circuit means maintaining the capacitive means in its changed energy state as long as the manual switch means is held in its actuated position to prevent the generation of further conduction initiating signals, and means in the signal generating circuit rendered efiective by placing the manual switch means in the normal position for returning the capacitive means to its normal energy state.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
US416670A 1961-12-22 1964-11-10 Switch controlled circuit for energizing an electric load for no more than a single cycle Expired - Lifetime US3215864A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE626414A BE626414A (xx) 1961-12-22
NL287218D NL287218A (xx) 1961-12-22
NL137795D NL137795C (xx) 1961-12-22
GB28337/64A GB1008414A (en) 1961-12-22 1962-12-21 A load controlling circuit
FR919540A FR1343241A (fr) 1961-12-22 1962-12-21 Outil portatif électrique notamment pour clouer, agrafer ou analogue et circuit de commande pour de tels outils
GB48335/62A GB1008412A (en) 1961-12-22 1962-12-21 Electrically operated tool
DEF38650A DE1175352B (de) 1961-12-22 1962-12-22 Tragbares Schlagwerkzeug
US416670A US3215864A (en) 1961-12-22 1964-11-10 Switch controlled circuit for energizing an electric load for no more than a single cycle
SE13369/66A SE305849B (xx) 1961-12-22 1966-10-04

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US161727A US3179866A (en) 1961-12-22 1961-12-22 Electromagnetically operated tool
US416670A US3215864A (en) 1961-12-22 1964-11-10 Switch controlled circuit for energizing an electric load for no more than a single cycle

Publications (1)

Publication Number Publication Date
US3215864A true US3215864A (en) 1965-11-02

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US416670A Expired - Lifetime US3215864A (en) 1961-12-22 1964-11-10 Switch controlled circuit for energizing an electric load for no more than a single cycle

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US (1) US3215864A (xx)
BE (1) BE626414A (xx)
DE (1) DE1175352B (xx)
FR (1) FR1343241A (xx)
GB (2) GB1008414A (xx)
NL (2) NL287218A (xx)
SE (1) SE305849B (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321692A (en) * 1963-09-26 1967-05-23 All American Eng Co Self-regulated battery charger
US3364318A (en) * 1965-08-20 1968-01-16 Babcock & Wilcox Co Environment-proof limit switch
US3375428A (en) * 1964-02-04 1968-03-26 Lorain Prod Corp Regulated rectifier circuit
US3418559A (en) * 1964-03-11 1968-12-24 Lorain Prod Corp Apparatus and method for gating the scr's in an inverter, and standby power-supply and battery-charging system incorporating the same
US3715605A (en) * 1972-04-12 1973-02-06 J Naber Control circuit for single stroke electrical tools
US3971969A (en) * 1974-10-02 1976-07-27 Swingline, Inc. Electrically operated stapling device
US4183453A (en) * 1977-04-10 1980-01-15 Swingline, Inc. Electronically operated portable fastener driving tool
US4293088A (en) * 1979-10-12 1981-10-06 Swingline Inc. Electronically operated portable fastener driving tool
US4305541A (en) * 1979-10-01 1981-12-15 Swingline Inc. Electronically operated portable nail gun
US4349143A (en) * 1980-05-12 1982-09-14 Parker Manufacturing Co. Electric stapler and driver assembly therefor
US4449161A (en) * 1982-07-16 1984-05-15 The Black & Decker Manufacturing Company One shot firing circuit for power tools
US4500936A (en) * 1983-08-09 1985-02-19 Textron, Inc. Fastener driving device having a three stage firing circuit
US4500938A (en) * 1983-02-16 1985-02-19 Textron, Inc. Fastener driving device
US5894398A (en) * 1995-04-18 1999-04-13 Square D Company Solenoid operated remote resetting device with a protective activation circuit
EP2321096A2 (en) * 2008-08-08 2011-05-18 Black & Decker, Inc. Multistage solenoid fastening tool with decreased energy consumption and increased driving force
CN102284942A (zh) * 2010-06-15 2011-12-21 喜利得股份公司 击入设备
WO2013091983A3 (de) * 2011-12-23 2013-09-26 Hilti Aktiengesellschaft Eintreibvorrichtung
EP2607023A3 (de) * 2011-12-23 2014-04-30 HILTI Aktiengesellschaft Eintreibvorrichtung
USRE45897E1 (en) 2008-04-14 2016-02-23 Stanley Black & Decker, Inc. Battery management system for a cordless tool

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101411C2 (de) * 1981-01-17 1984-06-20 Esco Metallwaren, Martin Hühnken, 2072 Bargteheide Schaltungsanordnung für ein elektrisches Eintreibgerät
DE3131350A1 (de) * 1981-08-07 1983-02-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltung zur phasenanschnittsteuerung eines thyristors oder triacs, insbesondere fuer den betrieb von elektromagnetischen vibrationsantrieben
SE456957B (sv) * 1984-04-16 1988-11-14 Electro Matic Staplers Inc Avtryckarstroemstaellarkrets i ett elektriskt handverktyg
GB201011008D0 (en) 2010-06-30 2010-08-18 Davy Process Techn Ltd Process and system
GB201102476D0 (en) 2011-02-11 2011-03-30 Davy Process Techn Ltd Process
US9893384B2 (en) 2014-05-18 2018-02-13 Black & Decker Inc. Transport system for convertible battery pack
CN113472027A (zh) 2014-05-18 2021-10-01 百得有限公司 电动工具系统
WO2018119256A1 (en) 2016-12-23 2018-06-28 Black & Decker Inc. Cordless power tool system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902641C (de) * 1951-07-24 1954-01-25 Albert Sohr Dipl Ing Elektromagnetischer Schwingantrieb
DE1133022B (de) * 1957-07-27 1962-07-12 Elemag Anstalt Schaltungsanordnung zur Speisung mindestens einer Magnetspule eines elektromagnetischen Schlaggeraetes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321692A (en) * 1963-09-26 1967-05-23 All American Eng Co Self-regulated battery charger
US3375428A (en) * 1964-02-04 1968-03-26 Lorain Prod Corp Regulated rectifier circuit
US3418559A (en) * 1964-03-11 1968-12-24 Lorain Prod Corp Apparatus and method for gating the scr's in an inverter, and standby power-supply and battery-charging system incorporating the same
US3364318A (en) * 1965-08-20 1968-01-16 Babcock & Wilcox Co Environment-proof limit switch
US3715605A (en) * 1972-04-12 1973-02-06 J Naber Control circuit for single stroke electrical tools
US3971969A (en) * 1974-10-02 1976-07-27 Swingline, Inc. Electrically operated stapling device
US4183453A (en) * 1977-04-10 1980-01-15 Swingline, Inc. Electronically operated portable fastener driving tool
US4305541A (en) * 1979-10-01 1981-12-15 Swingline Inc. Electronically operated portable nail gun
US4293088A (en) * 1979-10-12 1981-10-06 Swingline Inc. Electronically operated portable fastener driving tool
US4349143A (en) * 1980-05-12 1982-09-14 Parker Manufacturing Co. Electric stapler and driver assembly therefor
US4449161A (en) * 1982-07-16 1984-05-15 The Black & Decker Manufacturing Company One shot firing circuit for power tools
US4500938A (en) * 1983-02-16 1985-02-19 Textron, Inc. Fastener driving device
US4500936A (en) * 1983-08-09 1985-02-19 Textron, Inc. Fastener driving device having a three stage firing circuit
US5894398A (en) * 1995-04-18 1999-04-13 Square D Company Solenoid operated remote resetting device with a protective activation circuit
US6060797A (en) * 1995-04-18 2000-05-09 Square D Company Solenoid operated remote resetting device with a protective activation circuit
USRE45897E1 (en) 2008-04-14 2016-02-23 Stanley Black & Decker, Inc. Battery management system for a cordless tool
EP2321096A2 (en) * 2008-08-08 2011-05-18 Black & Decker, Inc. Multistage solenoid fastening tool with decreased energy consumption and increased driving force
EP2321096A4 (en) * 2008-08-08 2013-09-18 Black & Decker Inc MULTI-STAGE SOLENOID FIXING TOOL HAVING REDUCED POWER CONSUMPTION AND INCREASED STACKING FORCE
US8978953B2 (en) 2010-06-15 2015-03-17 Hilti Aktiengesellschaft Driving device
CN102284942A (zh) * 2010-06-15 2011-12-21 喜利得股份公司 击入设备
EP2397270A3 (de) * 2010-06-15 2013-12-25 HILTI Aktiengesellschaft Eintreibvorrichtung
CN102284942B (zh) * 2010-06-15 2016-09-14 喜利得股份公司 击入设备
WO2013091983A3 (de) * 2011-12-23 2013-09-26 Hilti Aktiengesellschaft Eintreibvorrichtung
CN104010742A (zh) * 2011-12-23 2014-08-27 喜利得股份公司 推入装置
EP2607023A3 (de) * 2011-12-23 2014-04-30 HILTI Aktiengesellschaft Eintreibvorrichtung
CN104010742B (zh) * 2011-12-23 2017-06-23 喜利得股份公司 推入装置

Also Published As

Publication number Publication date
BE626414A (xx)
FR1343241A (fr) 1963-11-15
NL137795C (xx)
SE305849B (xx) 1968-11-11
DE1175352B (de) 1964-08-06
NL287218A (xx)
GB1008414A (en) 1965-10-27
GB1008412A (en) 1965-10-27

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