公开(公告)号：US3829211A

公开(公告)日：1974-08-13

申请号：US33688473

申请日：1973-02-28

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: G03B27/58

CPC classification number: G03B27/582

Abstract: An easel construction for use in a darkroom and a method of using it which enables multiple exposures to be made on a single sheet of photographic paper in a series of simplified steps, the easel construction comprising a base, a plurality of interchangeable covers adapted to overlie one surface of the base and a lid or similar securing means for maintaining the covers in place over the base. A focusing target surface having delineated surface areas corresponding to the areas of the covers is formed on a second outer surface of the base. Prior to exposing areas of the photographic paper, the image to be printed is properly focused on a target surface area and the lense aperture adjusted, the easel is inverted and one or more corresponding areas of photographic paper retained on the opposite side are exposed after removal of an appropriate cover. The covers are uniquely configured to avoid double exposures and facilitate the desired print sizes and after complete exposure the entire sheet of sensitive paper is removed, chemically processed, and if desired, cut to form a plurality of individual prints.

公开(公告)号：US3806471A

公开(公告)日：1974-04-23

申请号：US72479168

申请日：1968-04-29

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: G01L1/20 ,  H01B1/22 ,  H01C10/10 ,  H01H1/029 ,  H01B1/06 ,  H01C9/06

CPC classification number: H01B1/22 ,  G01L1/20 ,  H01C10/106 ,  H01H1/029

Abstract: MATERIALS AND SENSING ELEMENTS HAVING CONTROLLED CHANGES OF RESISTANCE VALUES IN RESPONSE TO PRESSURE ARE PROVIDED BY VOLUMETRICALLY DISPERSING CONDUCTIVE OR PARTIALLY CONDUCTIVE PARTICULATES OF AT LEAST ONE TYPE THROUGHOUT A PREDETERMINED VOLUME. THE PARTICULATE MASS IS FINTIELY BUT MINUTELY COMPRESSIBLE IN AT LEAST ONE DIMENSION, BUT CONFINED IN OTHER DIMENSIONS WITHIN AN ENCOMPASSING STRUCTURE OR BY A BINDER OR MATRIX. THE PARTICLE DISPERSION IS SUCH THAT WITHOUT APPLIED PRESSURE THE ELEMENT, TYPICALLY FORMED IN A RELATIVELY THIN STRATUM, HAS A COMPOSITE RESISTANCE, VALUE DETERMINED BY MULTIPLE CURRENG FLOW PATHS, AND THIS VALUE MAY BE SO HIGH AS TO RENDER THE MATERIAL ESSENTIALY NONCONDUCTIVE. APPLIED OR INCREASED PRESSURE COMPACTS THE PARTICLES SUCH AS TO INCREASE THE NUMBER OF CURRENT FLOW PATHS. INCREASE TO CONTACT AREA BETWEEN PARTICLES AND THEREOFORE THE ARE OF THE CURENT FLOW PATHS, AND ALSO INCREASE INTERNAL STRAINS, WHILE DECREASING THE INTER-PARTICLE CONTACT RESIDENCE AND THE FLOW PATH LENGTHS, ALL THESE FACTORS CONCURRENTLY ACTING TO DECREASE THE RESISTANCE OF THE ELEMENT. THE COMPRESSION AND MOVEMENT ARE VERY LIMITED IN EXTENT, AND THE CURRENT FLOW IS CHANGED IN ESSENTIALLY SOLID STATE FASHION, WITHOUT ARCING OR CROSS-OVER. PARTICULATES, BINDERS AND BUFFERING POWDERS ARE DISCLOSED THAT ARE SUBJECT TO MINIMUM HYSTERESIS EFFECTS AND WEAR. THE RATE OF RESISTANCE CHANGE OF PRESSURE, AND THE RANGE OF RESISTANCE VALUES ARE CONTROLLED AND SELECTED BY VARIATION OF A NUMBER OF FACTORS, INCLUDING THE PROPERTIES AND RATIOS OF THE MATERIALS USED, THE THICKNESS OF THE ELEMENT, THE AREA UNDER COMPRESSION, THE APPLIED VOLTAGE AND THE CONFIGURATION AND SPACING OF COUPLED ELECTRODES.

公开(公告)号：US3751839A

公开(公告)日：1973-08-14

申请号：US3751839D

申请日：1971-12-27

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: B42D1/08 ,  B42F5/00 ,  G09F1/10

CPC classification number: B42D1/08 ,  B42F5/00 ,  Y10S428/90

Abstract: A picture album structure having a plurality of pages, a pair of flat, square, picture carriers with rectangular picture viewing windows related to each page, an orienting and holding means to selectively orient and releasably hold the carriers on the pages with the major axes of the carrier windows on central horizontal or vertical axes of the pages. The orienting and holding means comprising elements on the pages with four like portions on right angularly related axes relative to and spaced equal distances radially of the central axes of the pages and elements of similar configuration and arrangement on the carriers, the elements on the pages or on the carriers being magnetic elements and the other of said elements being ferrous whereby the magnetic and ferrous elements align and hold the carriers on the pages when the carriers are arranged adjacent thereto.

Abstract translation: 具有多个页面的图片相册结构，一对具有与每页相关的矩形图片查看窗口的平面，正方形的图片载体，定向和保持装置，用于选择性地定向和可释放地将载体保持在页面上， 载体窗口在页面的中心水平或垂直轴上。 定向和保持装置包括在页面上的元件，其具有相对于页面的中心轴线的径向相对于并且间隔相等的距离的四个相似部分，并且在载体上具有类似的配置和布置，页面上的元件或 在所述载体上是磁性元件，并且所述元件中的另一个是亚铁，由此当所述载体与所述载体相邻布置时，所述磁性元素和亚铁元件将载体对准并保持在页面上。

公开(公告)号：US3741609A

公开(公告)日：1973-06-26

申请号：US3741609D

申请日：1971-06-29

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: E21C25/30

CPC classification number: E21C25/30

Abstract: A cutter bar for a mineral cutting machine such as a coal cutter which bar is provided with a tapered body portion formed from a pair of oppositely facing elongated support channel members of Ushaped cross section secured and spaced apart in back toward back relationship by a plurality of spacer blocks rigidly secured therebetween and guideways formed of paired, channel-forming, one piece guide members of Z cross section having respective leg portions inserted in the support channels to form guideways of Ushaped cross section for a cutter chain having a link with leg portions to be inserted in the guideways and gibs on the ends of said leg portions to be received in gib raceways formed in the inside surfaces of the guide members adjacent to the bottom surfaces of the guideways.

Abstract translation: 一种用于矿物切割机的切割杆，例如煤切割机，该杆设有锥形主体部分，该锥形主体部分由U形横截面的一对相对的细长支撑通道构件形成，U形横截面通过一个 多个间隔块刚性地固定在它们之间，并且由成对的通道形成的导槽形成，Z形横截面的一个导向构件具有插入在支撑通道中的各个脚部分，以形成具有连接件的切割链的U形横截面的导轨 其中腿部被插入导轨中，并且所述腿部的端部上的扶手被容纳在形成在与导轨的底面相邻的引导构件的内表面中的立柱滚道中。

公开(公告)号：US3837180A

公开(公告)日：1974-09-24

申请号：US27343372

申请日：1972-07-20

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: F16D3/38 ,  F16D3/26

CPC classification number: F16D3/38

Abstract: An angular coupling made up of three main parts - a pair of end pieces having loops interlocked in mutually transverse positions, and a double reverse-turn continuous center piece forming linear elements respectively positioned in the concave corners formed by the interlocked loops, whereby the loops and linear pieces together form a circumferentially continuous series of interengaging elements through which the torque is transmitted.

Abstract translation: 由三个主要部件组成的角度联轴器 - 一对具有相互横向位置互锁的回转件，以及形成分别定位在由互锁环形成的凹形拐角中的线性元件的双反向转弯连续中心件，由此环 并且线性件一起形成周向连续的一系列相互接合的元件，扭矩通过该相互作用元件传递。

公开(公告)号：US3748045A

公开(公告)日：1973-07-24

申请号：US3748045D

申请日：1971-04-19

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: G01J3/52

CPC classification number: G01J3/52

Abstract: A color comparator providing, in a single device, an expedient and accurate combination of filter media arranged in a generally planar relationship to provide a three dimensional effect portraying the interrelationship of the filter media. The comparator includes neutral density material for providing substantially uniform white light transmission over the entire comparator area and means to facilitate assembly.

Abstract translation: 一种颜色比较器，其在单个装置中提供以大致平面关系布置的过滤介质的方便和精确的组合，以提供描绘过滤介质的相互关系的三维效果。 比较器包括用于在整个比较器区域上提供基本上均匀的白光透射的中性密度材料和便于组装的装置。

公开(公告)号：US3790870A

公开(公告)日：1974-02-05

申请号：US3790870D

申请日：1971-03-11

Applicant: MITCHELL R

Inventor： MITCHELL R

IPC: H01L29/84 ,  H01L3/00 ,  H01L5/00

CPC classification number: H01L29/84

Abstract: A new class of bi-stable solid state switching devices, designated Force Switchable Diodes or FSD''s, are provided by copper/cuprous oxide rectifying or ''''blocking'''' junction devices, exemplified in elemental form by a copper substrate, a contacting thin cuprous oxide layer and the interface between them, such devices are arranged to avalanche from a blocking state to an essentially conducting state on the application of force when under a related voltage, and avalanche back to a blocking state on the removal of at least a portion of that force. The transition between the states is sharp, predictable and free of arcing effects. A single copper/cuprous oxide junction provides unidirectional switching, and an assembly comprising a set of copper/cuprous oxide/copper junctions provides bi-directional switching or polarity insensitivity. De-switching does not require a reduction of applied voltage, nor does switching require an increase in applied voltage. Force Switchable Diodes, however, provide an inverse relationship between switching force and voltage, and a positive relationship between switching force and thickness of the cuprous oxide layer. The invention provides for both discrete switches and integrated matrix switching arrays, and further comprises mechanical and electrochemical methods of forming blocking junctions.

Abstract translation: 一种新型的双稳态固态开关器件，指定为可切换二极管或FSD，由铜/氧化亚铜整流或“阻塞”接点器件提供，以铜基片，接触薄氧化亚铜层和 它们之间的接口，这样的装置被布置成在相关电压下施加力时从阻塞状态雪崩到基本上导通的状态，并且在去除该力的至少一部分时雪崩回到阻挡状态。 州之间的过渡是尖锐的，可预测的，没有电弧效应。 单个铜/氧化亚铜结提供单向切换，并且包括一组铜/氧化亚铜/铜结的组件提供双向切换或极性不敏感。 去开关不需要降低施加的电压，开关也不需要施加电压的增加。 然而，力可切换二极管提供开关力和电压之间的反比关系，以及氧化亚铜层的切换力和厚度之间的正相关关系。 本发明提供了离散开关和集成矩阵开关阵列，并且还包括形成阻挡结的机械和电化学方法。