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公开(公告)号：US3604300A
公开(公告)日：1971-09-14
申请号：US3604300D
申请日：1969-06-24
Applicant: CUTLER HAMMER INC
Inventor： ALLISON ARTHUR F , SALZBRENNER SIEGFRIED R
CPC classification number: B26D5/26 , Y10T83/159 , Y10T83/859
Abstract: Digital systems for controlling continuously rotating, variablespeed cutoff knives to provide precise control of the lengths of sheets cut from high-speed moving corrugated boards or webs. A main motor acts through a clutch to drive a double-facer that forms and advances a continuous strip of corrugated board. A slitter slits the board at the middle to form two strips. A top knife cuts one of the strips into sheets and a bottom knife cuts the other strip into sheets. The main motor drives a mechanical variable speed (Reeves) drive and a cyclic mechanism for each knife. Each knife is provided with a frequency based control system that acts through an associated correction motor to adjust its Reeves drive closely to control the cutoff length to a selected value. For this purpose, a web rider generates a reference pulse for each one-sixteenth inch of board. A tachometer generator provides 1,600 feedback pulses each revolution of the knife, a portion of which may be preselected at thumb wheel switches to select the desired length of sheets. The frequency based control system responds to the frequency and phase of preselected feedback pulses and the reference pulses to provide a knife speed correction signal and a position or phase correction signal for precise control of the correction motor at any time that there is error. The system is preset by first switching from the web rider pulse generator to a preset pulse generator operated from the main motor to adjust the system close to the desired cutoff length before any board is run to prevent waste. A second set of thumb switches affords presetting of the sheet length for the next order while the system is running preparatory to switchover. A presettable sheet counter automatically displays the number of sheets remaining to be cut and stops the system when the selected number of sheets has been cut or may be used to start operation of an automatic order changer. An add-on counter allows selection of an additional number of sheets to be cut while the system is operating. A sheet length readout displays the actual cut length of alternate sheets within a hundredth of an inch. A footage counter displays the total length of board used on an order in 10 foot increments.
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公开(公告)号：US3918574A
公开(公告)日：1975-11-11
申请号：US51245574
申请日：1974-10-07
Applicant: CUTLER HAMMER INC
Inventor： ALLISON ARTHUR F
CPC classification number: B65G23/36
Abstract: A multiple D.C. motor drive for wire and other belt type of conveyors is disclosed. D.C. permanent magnet motors with their armatures electrically connected in series to an adjustable voltage power supply are used. The armatures of the motors are directly connected to the conveyor roller or pulley drive shaft at spaced points along the conveyor run. A preferred form for such motors and a simple driving and mounting arrangement therefor are also disclosed.
Abstract translation: 公开了用于电线和其他带式输送机的多直流电机驱动器。 使用其电枢与可调电压电源串联电连接的直流永磁电动机。 马达的电枢沿输送机运行的间隔点直接连接到输送辊或皮带轮驱动轴上。 还公开了这种电动机的优选形式及其简单的驱动和安装装置。
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公开(公告)号：US3681624A
公开(公告)日：1972-08-01
申请号：US3681624D
申请日：1970-12-17
Applicant: CUTLER HAMMER INC
Inventor： ALLISON ARTHUR F , GREENING DONALD J , MOLLGAARD ANTON N
CPC classification number: H03K3/351
Abstract: A negative resistance circuit such as a pulse-forming or relaxation oscillator circuit employing a unijunction transistor as the negative resistance element and adapted for firing an SCR or the like. The tendency of the negative resistance element to fail to recover to non-conducting condition after it has been triggered into conduction, due to a low valley current characteristic, is overcome by an improved recovery circuit that uses the interbase current to reduce the input current.
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公开(公告)号：US3675104A
公开(公告)日：1972-07-04
申请号：US3675104D
申请日：1970-12-17
Applicant: CUTLER HAMMER INC
Inventor： ALLISON ARTHUR F , GREENING DONALD J , MOLLGAARD ANTON N
CPC classification number: H02P7/293 , Y10S388/917 , Y10S388/934
Abstract: A single-phase full-wave regenerative SCR (silicon controlled rectifier) drive having a series and shunt, T-network, reactor configuration, minimum firing of both forward and regenerative SCR''s, and current feedback regulation. The reactor configuration along with the controlled minimum firing angle assures continuous current through the motor armature over substantially the entire load range except for the low 10 to 20 percent whereas normally continuous current occurred only in about the upper half of the load range. This allows the current regulator to be designated for continuous current rather than discontinuous current, having higher gain, and affording better control. By continuous current, heating also is reduced.
Abstract translation: 具有串联和分流，T网络，电抗器配置的单相全波再生SCR（可控硅整流器）驱动器，正向和再生SCR的最小点火以及电流反馈调节。 电抗器配置以及受控的最小触发角确保了连续电流通过电机电枢在基本上整个负载范围内，除了低10至20％之间，而正常连续电流只发生在负载范围的上半部分左右。 这允许将电流调节器指定为连续电流而不是不连续电流，具有较高的增益，并提供更好的控制。 通过连续电流，加热也减少。
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