-
1.发明授权Escapement mechanism and backspace mechanism for a moving paper carriage typewriter having dual pitch capability 失效具有双音调能力的移动纸架打字机的擒纵机构和退格机构
公开(公告)号：US4285605A
公开(公告)日：1981-08-25
申请号：US54059
申请日：1979-07-02
摘要： A mechanism which will function to allow the escapement of the carriage of a typewriter in one of two predetermined escapement pitches and be capable of backspace operation from a single backspace input for both pitches regardless of which escapement pitch is selected. Escapement ratchets for the two selected pitches are combined, together with a backspace ratchet. Each of the escapement ratchets are engageable by an escapement pawl and the engagement of a pawl with a particular ratchet will determine the pitch within which the escapement system will function. A backspace ratchet is combined with the escapement ratchets and fixedly attached thereto to provide the backspace drive. The backspace ratchet is selectably engageable by the backspace pawl for causing rotation in the opposite direction of that normally utilized for escapement. All motion of the escapement ratchets or backspace ratchet is transmitted through a pinion mounted to the ratchet assembly and, in turn, is transmitted to the paper carriage rack.
摘要翻译： 一种机构，其功能是允许打字机的滑架在两个预定的擒纵机构间距中的一个擒纵，并且能够从两个间距的单个后退输入中退回操作，而不管选择哪个擒纵机构。 两个选择的间距的擒纵棘轮与后退棘轮相结合。 每个擒纵轮棘爪都可以通过擒纵爪接合，并且棘爪与特定的棘轮的接合将决定擒纵系统将起作用的间距。 后退棘轮与擒纵机构棘轮组合并固定在其上以提供后退驱动。 后退棘爪可由后退爪选择地接合，用于沿着通常用于擒纵机构的相反方向旋转。 擒纵装置棘爪或后退棘轮的所有运动通过安装到棘轮组件上的小齿轮传递，并且又传递到纸架。
-
公开(公告)号：US4383777A
公开(公告)日：1983-05-17
申请号：US163841
申请日：1980-06-27
CPC分类号： B41J19/70
摘要： A carriage return device utilizing a spring clutch and shock unloader spring is disclosed in conjunction with a cord tension sensing mechanism for detecting the cord tension increases when the paper carriage of a typewriter ceases to move and the carriage return drive mechanism continues to operate. It is desirable to disengage the drive mechanism at that point rather than to cause frictional wear or overloading of the motor pending a predetermined amount of driving time prior to disengagement. Upon the cord tension reaching a preset value, the clutch pawl will disengage the drive clutch and prevent further wear of the clutching arrangement. To prevent premature disengagement of the clutch, a shock unloading pretensioned spring is incorporated in the drive unit to absorb the initial shocks of clutch engagement and the forces experienced during acceleration of the paper carriage.
摘要翻译： 公开了一种利用弹簧离合器和冲击卸载器弹簧的回转装置，其结合帘线张力感测机构，用于当打字机的纸托架停止移动并且托架返回驱动机构继续运行时检测绳索张力增加。 期望在该点处分离驱动机构，而不是在分离之前导致电动机的摩擦磨损或超载等待预定量的行驶时间。 当帘线张力达到预设值时，离合器爪将使驱动离合器脱离，并防止离合装置进一步磨损。 为了防止离合器的过早脱离，在驱动单元中结合有减震预紧力的弹簧，以吸收离合器接合的初始冲击以及在纸架加速期间经受的力。
-
公开(公告)号：US4221489A
公开(公告)日：1980-09-09
申请号：US957942
申请日：1978-11-06
IPC分类号： B41J13/02 , B41J13/036 , B41J13/076
CPC分类号： B41J13/036 , B41J13/076
摘要： A paper feed roll assembly is disclosed which is pivotally mounted on a central point with three degrees of freedom of movement. The feed rolls are engageable with the periphery of the platen. Additionally, the support for the paper feed rolls is deflectable about the central point by a feed roll release member to effect the withdrawal of the feed rolls from the periphery of the platen to enhance paper insertion and removal. The pivot point support provides for freedom of movement in the three necessary degrees of freedom to allow equilization of feed roll force against the platen and for alignment of the feed rolls with the periphery of the platen to insure proper paper feed. The feed roll truck frame, by virtue of its pivotal mounting, may be deflected downward to permit release or insertion of the paper. A deflection means or eccentric bar is disclosed for deflecting the truck member away from the periphery of the platen against the force of the pivot support acting toward the platen.
摘要翻译： 公开了一种供纸辊组件，其被枢转地安装在具有三个运动自由度的中心点上。 进料辊可与压板的周边接合。 此外，供纸辊的支撑件可以通过进给辊释放构件围绕中心点偏转，以使进给辊从压盘的周边退出以增强纸的插入和移除。 枢轴点支撑件提供三个必要自由度的运动自由度，以允许进给辊力相对于压板的等同化，并且用于使进给辊与压板的周边对准以确保适当的进纸。 进料辊车架由于其枢转安装而可能向下偏转以允许纸的释放或插入。 公开了一种偏转装置或偏心杆，用于使卡车构件克服着作用于压板的枢转支撑件的力而远离压板的周边。
-
-
搜索结果
3 条记录 (耗时 0.018 秒)
