公开(公告)号：US3724248A

公开(公告)日：1973-04-03

申请号：US3724248D

申请日：1971-10-07

Applicant: CONTROLS CO OF AMERICA

Inventor： OBERMANN G

IPC: F16H29/02 ,  G05B19/06 ,  G05G21/00 ,  H01H43/10 ,  F16H29/00

CPC classification number: H01H43/102 ,  F16H29/02 ,  Y10T74/1518 ,  Y10T74/1529 ,  Y10T74/1555 ,  Y10T74/2133

Abstract: The outer ratchet wheel is a part of the timing cam drum of a step-by-step type of interval timer. The outer ratchet is advanced by means of a pawl which is reciprocated as the slow rise fast drop cam rotates to retract the pawl one tooth and advance the pawl with a snap action until the pawl abuts a stop member, at which time the retaining pawl engages the same tooth to hold the cam in place. At certain intervals or positions on the outer ratchet the teeth are missing thereby allowing the drive pawl (and then the retaining pawl) to ''''reach inside'''' and engage a time delay ratchet which is then advanced inside the outer ratchet a number of steps until the inner ratchet engages the inside of the outer ratchet and starts driving the outer ratchet until the drive pawl and retaining pawl are back onto the outside ratchet, at which time the inside ratchet is released and returned to its original point by the spring bias. This allows what would normally be a short interval on the outer ratchet to be ''''stretched'''' to provide a long interval without consuming too many steps of the timing cam.

Abstract translation: 外棘轮是逐步式间隔计时器的正时凸轮鼓的一部分。 外部棘轮通过棘爪前进，棘爪随着缓慢升高的快速下降凸轮旋转而往复运动，以使棘爪缩回一个齿，并以卡扣动作推进棘爪，直到棘爪抵靠止动构件，此时保持爪接合 相同的牙齿将凸轮固定到位。 在外部棘轮上的某些间隔或位置处，齿缺失，从而允许驱动爪（然后保持爪）“到达内部”并且接合时间延迟的棘轮，然后在外棘轮内进行多个步骤，直到 内棘轮接合外棘轮的内部并开始驱动外棘轮，直到驱动棘爪和保持爪回到外棘轮上，此时内棘爪被释放并通过弹簧偏压返回到其原始点。 这允许外部棘轮上通常是短暂的间隔被“拉伸”以提供长的间隔而不消耗定时凸轮的太多台阶。

公开(公告)号：US3752944A

公开(公告)日：1973-08-14

申请号：US3752944D

申请日：1971-11-01

Applicant: CONTROLS CO OF AMERICA

Inventor： WILLIGMAN J ,  CARTIER R ,  OBERMANN G

IPC: H01H43/10 ,  G05B19/06 ,  H01H19/63 ,  H01H43/02 ,  H01H3/42

CPC classification number: H01H43/026 ,  H01H19/63

Abstract: The timer has switches including upper and lower passive blades and an active blade therebetween. The distal end of the lower passive blade has depending spacers which straddle the cam upon which the follower on the distal end of the active blade rides. The spacers reference the lower passive blade off the hub of the drum type program cam. The lower passive blade is provided with a rest or stop for the upper passive blade limiting downward movement of that blade. With precision molding, both passive blades are accurately referenced from the cam hub and the location of the follower which actuates the active blade is precisely located. Accuracy of switching is increased without increased precision in manufacture. Use of two cam tracks permits simultaneous actuation of the active and ''''passive'''' blades to effect faster switching. It is possible to provide a ''''makemake'''' arrangement instead of the double throw arrangement.

Abstract translation: 定时器具有包括上和下被动叶片和其间的有效叶片的开关。 下部被动叶片的远端具有悬挂在凸轮上的固定间隔件，活动叶片的远端上的从动件骑在该凸轮上。 隔离片将下部被动叶片从鼓式程序凸轮的轮毂上引导。 下部被动叶片设置有用于上部被动叶片的休息或停止，从而限制该叶片的向下运动。 通过精密成型，两个被动叶片都从凸轮毂精确地参考，驱动活动叶片的随动件的位置精确定位。 切换精度提高而不增加制造精度。 使用两个凸轮轨道允许同时激活主动和“被动”叶片以实现更快的切换。 可以提供“make-make”而不是双掷装置。

公开(公告)号：US3722304A

公开(公告)日：1973-03-27

申请号：US3722304D

申请日：1971-10-01

Applicant: CONTROLS CO OF AMERICA

Inventor： OBERMANN G

IPC: H01H43/10 ,  G05G1/00

CPC classification number: H01H43/102 ,  Y10T74/1503 ,  Y10T74/2133 ,  Y10T74/2136 ,  Y10T74/2138

Abstract: The continuously driven drive disc carries a drive pawl and a retracting lever on the same pivot. The pawl is biased against the lever by a compressed spring. The lever is held in retractive position by a tension spring. The lever includes a cam which engages a tab (projecting from the timer end plate) to move the lever to an inactive position against the bias of the tension spring while the drive pawl is restrained from following by reason of engagement of a depending finger with a second tab. Continued rotation of the disc clears the finger from the second tab allowing the compressed spring to drive the pawl into engagement with the internal teeth on the timer cam drum thus driving the drum until the lever clears its tab and is retracted by the second (tension) spring. As the lever is retracted it picks up the pawl and retracts the pawl and the drive step is completed. The drive is more economical than the usual stored energy step drive but is more expensive than a creep-type drive. It makes possible variations in steps (degrees and frequency) and even continuous (rapid) drive.

Abstract translation: 连续驱动的驱动盘在相同的枢轴上携带驱动爪和缩回杆。 棘爪通过压缩弹簧偏压到杠杆上。 杠杆通过拉伸弹簧保持在回缩位置。 杠杆包括凸轮，该凸轮接合突出部（从定时器端板突出），以克服拉伸弹簧的偏压将杠杆移动到非活动位置，同时驱动爪由于悬挂手指与 第二个选项卡。 盘的继续旋转使第二舌片从第二舌片上移开，使得压缩的弹簧能够将棘爪驱动与定时器凸轮鼓上的内齿接合，从而驱动滚筒，直到杠杆清除其舌片并被第二（张力）缩回） 弹簧。 当杠杆缩回时，拾取棘爪并缩回棘爪，驱动步骤完成。 该驱动器比通常储存的能量步进驱动器更经济，但比蠕变式驱动器更昂贵。 它使步进（度和频率）甚至连续（快速）驱动变得可能。

公开(公告)号：US3823280A

公开(公告)日：1974-07-09

申请号：US40996173

申请日：1973-10-26

Applicant: CONTROLS CO OF AMERICA

Inventor： OBERMANN G ,  ENGER M ,  MISIK M

IPC: H01H43/10 ,  G04C23/16 ,  H01H43/02

CPC classification number: H01H43/022 ,  G04C23/16 ,  H01H43/026 ,  H01H2011/062

Abstract: The motor subassembly is mounted in the housing with the motor leads dressed between the motor case and the housing and connected to the motor terminal and to a switch blade terminal and does not require grounding. The gear case somewhat divides the motor case to retain the coil while the motor case cover cooperates with the gear case to enclose and journal the gearing with the drive pinion projecting therebetween to drive the gear on the perimeter of the timing cam. The timing cam is journaled on the bushing extruded from the motor cover and in the aperture in the housing cover with the gear cluster extension projecting into and visible in the cam hub to afford visual verification of motor operation. The three switch blades are accurately located in the housing by tabs engaging locating cavities and the pivoted yoke has pads which space the two outside blades from each other. During the time between defrost cycles the No. 1 blade rides on the cam with the No. 2 blade engaging the No. 1 blade. When the No. 1 blade drops off the cam drop, the No. 3 blade engages the No. 2 blade and remains so engaged until the No. 2 blade drops off the cam. The tangential distance between the ends of blades No. 1 and No. 2 determines the duration of the cycle in combination with the rotational speed of the cam. All components are trapped by the assembly of the cover to the housing which is accomplished without fasteners. The great reduction in parts while completely enclosing the product results in a quiet, low cost, accurate timer which is easily serviced in the field by way of easy verification of operation.