公开(公告)号：US4139754A

公开(公告)日：1979-02-13

申请号：US732976

申请日：1976-10-18

申请人： William H. Hofferberth

发明人： William H. Hofferberth

IPC分类号： H01H11/06 ,  H01H50/54 ,  H01H67/02

CPC分类号： H01H11/06 ,  H01H50/546

摘要： A stationary contact of an electromagnetic contactor having an insulating contact mounting plate is part of a contact combination that includes a contact arm, a retainer and a fastening screw for electrically and mechanically securing the contact combination to a terminal of the contactor. The contact is mounted on the forward end of the arm and the retainer, constructed of spring sheet material, engages the rear of the arm. The front of the arm and the retainer cooperate to form a recess which receives and grips a formation of the mounting plate.

摘要翻译： 具有绝缘触点安装板的电磁接触器的固定触头是接触组合的一部分，其包括接触臂，保持器和紧固螺钉，用于将接触组合电气和机械地固定到接触器的端子。 接触件安装在臂的前端，并且由弹簧片材料构成的保持器接合臂的后部。 臂和保持器的前部协作以形成容纳和夹持安装板的形状的凹部。

公开(公告)号：US4488133A

公开(公告)日：1984-12-11

申请号：US479366

申请日：1983-03-28

申请人： David P. McClellan ,  Gerald R. Duble ,  William H. Hofferberth

发明人： David P. McClellan ,  Gerald R. Duble ,  William H. Hofferberth

IPC分类号： H01H73/02 ,  H01H77/10 ,  H01H61/02

CPC分类号： H01H77/104

摘要： A so-called blow-off type current limiting circuit breaker is constructed with a contact pressure spring that also holds the contact arm in open contact position when the contacts are blown open by electrodynamic forces. A multi-section cam means transmits contact opening and closing forces produced by a spring powered overcenter toggle type operating mechanism to the movable contact arm. A follower on the latter is biased into engagement with the cam means by the contact pressure spring. The cam means is so constructed that during contact blow-off the movable contact arm requires relatively little motion to move overcenter in the opening direction. One section of the cam means is constructed so that when the contact arm moves overcenter in the opening direction during contact blowoff, speed of the contact arm is controlled to an extent that contact rebound does not become a problem. Another section of the cam means is constructed so that with the line of action of the contact pressure spring extending lengthwise of the contact arm, a strong component of force is developed transverse to the length of the contact arm to urge the contacts into butt-type engagement.

摘要翻译： 所谓的吹出式限流断路器由接触压力弹簧构成，当触头被电动力打开时，接触压力弹簧也将接触臂保持在开放接触位置。 多段凸轮装置将由弹簧供电的中心肘型操作机构产生的接触开启和关闭力传递到可动接触臂。 后者的跟随器被接触压力弹簧偏置成与凸轮装置接合。 凸轮装置的构造使得在接触吹扫期间，可移动接触臂需要相对较小的运动以在打开方向上移动中心。 凸轮装置的一部分被构造成使得当接触臂在接触吹扫期间沿打开方向移动超中心时，接触臂的速度被控制到接触回弹不会成为问题的程度。 凸轮装置的另一部分被构造成使得随着接触压力弹簧的作用线沿接触臂的纵向延伸，强力的分力横向于接触臂的长度产生，以将接触件推向对接型 订婚。