公开(公告)号：US4979321A

公开(公告)日：1990-12-25

申请号：US468893

申请日：1990-01-23

Applicant: Peter J. Hall

Inventor： Peter J. Hall

IPC: A01G23/04

CPC classification number: A01G23/046

Abstract: An excavator for excavating a tree and forming a root ball consisting of an excavator scoop having a plurality of segments mounted for movement with respect to one another between a nested position in which the segments are nested one within another and a deployed position in which the segments are extended fron one another and cooperate with one another to form a bowl-shaped scoop. A drive mechanism is provided which serves to drive the segments from the nested position to the deployed position, such that when the nested segments are located adjacent a tree and then driven to the deployed position the segments will pass under the tree to evacavate the tree and form a root ball within the deployed scoop. The excavator is mounted on a crane which is in turn mounted on a truck. The crane serves to manipulate the excavator between a ground contacting position and a load transporting position. In this load transporting position a tree is supported with its root ball in the scoop and its trunk and branches extending toward the back end of the truck.

Abstract translation: 一种挖掘机，用于挖掘一棵树，并形成一个由具有多个分段的挖掘机铲斗组成的根球，所述挖掘机铲斗被安装成相对于彼此移动的嵌套位置之间，所述嵌套位置在所述嵌套位置中，所述嵌套位置中的所述段被嵌套在另一个中，所述展开位置中， 彼此延伸并相互配合，形成一个碗状的勺子。 提供了驱动机构，其用于将段从嵌套位置驱动到展开位置，使得当嵌套段位于树附近并且然后被驱动到展开位置时，段将在树下方通过以抽出树，并且 在部署的勺子内形成根球。 挖掘机安装在起重机上，起重机依次安装在卡车上。 起重机用于在地面接触位置和负载传送位置之间操纵挖掘机。 在这个负载运输位置，树根被支撑在勺子中，其根部的球，其躯干和分支延伸到卡车的后端。

公开(公告)号：USD260998S

公开(公告)日：1981-09-29

申请号：US49231

申请日：1979-06-18

Applicant: Peter J. Hall

Designer： Peter J. Hall

公开(公告)号：US4245898A

公开(公告)日：1981-01-20

申请号：US835956

申请日：1977-09-23

Applicant: Peter J. Hall

Inventor： Peter J. Hall

IPC: G03B21/11 ,  G03B23/08

CPC classification number: G03B21/116

Abstract: A microfiche reader according to the present invention includes a housing consisting of a hood portion and a base portion, a screen located within the hood portion and visible through the front end of the hood, a combined microfiche carriage and index holder, a lens assembly and a projection system. The combined microfiche carriage and index holder serves to accurately locate the microfiche with respect to the index grid. By reason of the fact that there is no relative movement between the index grid and the microfiche in use, it is always possible to accurately locate the microfiche with respect to the projection system by reference to the index grid. The index grid is illuminated by an index illuminating lens carried by the housing. The illuminating lens is located in a fixed relationship with respect to the projection path which again contributes to the facility with which the microfiche may be accurately located in the projection path. The lens assembly includes a support plate mounted above the microfiche carriage and a slide member mounted in the support plate and a pair of lens members mounted in the slide members so that either one may be located in the projection path as required. The projection system includes a demountable modular unit which may be easily mounted in and removed from the housing. A prefocussed lamp is mounted on the modular unit and the position of the prefocussed lamp with respect to the modular unit may be adjusted so as to vary the length of the illuminating path between the prefocussed lamp and the condenser means whereby the optical system may be adjusted to accommodate objective lenses having different characteristics. The projection system consists of a prefocussed lamp which projects a beam of light onto a cold mirror which reflects the beam of light through an optical condenser which in turn directs the beam of light through the micromirror is mounted in the housing and reflects the beam of light emitted from the objective lens to a viewing screen mounted in the housing. The viewing screen consists of a unitary body of molded plastics material having an image receiving surface formed with a concave spherical curvature. The image receiving surface may be plated with a suitable coating to form an image reflecting coating thereon.