公开(公告)号：US08806952B1

公开(公告)日：2014-08-19

申请号：US13549513

申请日：2012-07-15

Applicant: David Ewing Glass

Inventor： David Ewing Glass

IPC: G01N3/08

CPC classification number: G01L5/103 ,  A63B61/02 ,  A63B2071/0694 ,  A63B2102/02 ,  A63B2102/04 ,  A63B2102/16 ,  A63B2220/51 ,  A63B2243/0095

Abstract: In one aspect, an apparatus for measuring a tension force on a net cord of a sports net is disclosed. The apparatus may include a housing configured to connect to a static post. The apparatus may also include a slidable member and attachment members. The attachment members may be configured to engage a portion of the net cord. A resilient member inside the housing may be connected to the slidable member, and an indicator member may be connected to the slidable member within the housing. The slidable member may be configured to move within the housing in response to and by a distance proportional to an amount of tension force on the net cord. The indicator member may be connected to the slidable member such that a portion of the indicator member may be exposed through a slotted opening defined in the housing.

Abstract translation: 一方面，公开了一种用于测量运动网的网线上的张力的装置。 该装置可以包括被配置为连接到静态柱的壳体。 该装置还可以包括可滑动构件和附接构件。 附接构件可以构造成接合网线的一部分。 壳体内的弹性构件可以连接到可滑动构件，并且指示构件可以连接到壳体内的可滑动构件。 可滑动构件可以被配置为响应于与网线上的张力的量成比例的距离在壳体内移动。 指示器构件可以连接到可滑动构件，使得指示构件的一部分可以通过限定在壳体中的开槽开口露出。

公开(公告)号：US20190060737A1

公开(公告)日：2019-02-28

申请号：US15691709

申请日：2017-08-30

Applicant: David Ewing Glass

Inventor： David Ewing Glass

IPC: A63C17/14 ,  B60T1/14

Abstract: According to one aspect, an apparatus for reducing the speed or acceleration of motion of a skateboard and its user is disclosed. According to one embodiment, the apparatus includes one or more friction elements that are removably affixed to a substantially flat resilient member at a location near the first end of the resilient member typically proximate to the rear wheel mounting truck; the resilient member is then affixed by fasteners upon its opposite and second end to the underneath face of the platform of the skateboard, typically proximate to or forward of the center of the platform. The apparatus also includes a substantially rigid linkage that penetrates the skateboard platform and is affixed to near the first end of the resilient member for the purpose of interfacing the first end of the resilient member selectively to one foot of a user of the skateboard, such that when the user desires to reduce the speed or acceleration of the skateboard the user applies to the linkage a force substantially normal to the skateboard platform and therefore the resilient member. The force applied to the resilient member causes the friction element or elements to contact the riding surface, creating by the contact of the friction element or elements with the riding surface a frictional force that is transmitted to the skateboard platform via the fixation of the second end of the resilient member to the skateboard, opposingly counteracting the velocity or acceleration of the skateboard and user, thereby slowing the motion. The frictional force is modulated by the variable force applied to the apparatus by the user.