Magnetic wire holding device
AssigneeMcDonnell Douglas Corporation
InventorRobert D. Porter
Life of this patent
Estimating the term…
Abstract
An improved measuring device for determining both major and pitch diameters of screw threads, gears, splines and the like, wherein attractable magnetic members attached to a movable spindle and fixed anvil serve to attract and retain gauging wires in their proper positions. An adjustable screw and spring assembly biases the spindle toward the anvil with a predetermined and readily adjustable pressure.
Claims20
An improved, hand-held measuring device for determining both the major and pitch diameters of screw threads, gears, splines and the like, and comprising:
- an elongated body having a passageway extending along a longitudinal axis thereof;
- said passageway having a front-end portion and a rear-end portion aligned with one another and with said longitudinal axis of said elongated body;
- a spindle slidably disposed within said passageway, with said spindle having a forward end portion extending through and beyond the forward-end portion of said passageway;
- a hollow adjustment screw encircling said spindle and threadedly attached to a portion of said elongated body forming said rear-end portion of said passageway;
- a support assembly comprising a plurality of attached leg portions including a first leg portion attached to said elongated body and a second leg portion having a surface intersecting the longitudinal axis of said body and confronting said forward end of said spindle, forming an opening of sufficient size to position a screw thread therebetween;
- adjustable biasing means disposed within said passageway between said hollow adjustment screw and said forward end portion of said spindle for biasing said spindle through said passageway toward said second leg portion of said support assembly;
- at least one of said confronting surfaces of said second leg portion and said forward end of said spindle including attractable magnetic means having a magnetically attractable end surface facing said opening for attracting and magnetically retaining gauging wires as required for determining the pitch diameter of a screw thread positioned in the opening formed by said confronting surfaces.
An improved measuring device for determining the diameter of screw threads, gears, splines and the like, and comprising:
- an elongated body having a passageway extending along a longitudinal axis thereof:
- a substantially rectangularly-shaped handle grip extending from said body in a transverse direction to said longitudinal axis;
- a spindle slidably disposed within said passageway and having a forward end portion extending beyond a forward end portion of said passageway;
- a substantially U-shaped support assembly attached to said body and having a fixed end portion spaced from and confronting the forward end portion of said spindle;
- a hollow adjustment screw encircling said spindle and threadedly supported in a rear-end portion of said passageway;
- biasing means disposed within said passageway between said hollow adjustment screw and said forward end portion of said spindle for biasing said spindle into contact with said fixed end portion of said support assembly;
- trigger means for retracting said spindle through said passageway against said biasing means, thereby allowing a screw thread, gear or spline to be placed between confronting surfaces of said spindle and fixed end portion of said support assembly;
- and
- an attractable magnetic member mounted on the forward end portion of said spindle and a separate attractable magnetic member mounted on the confronting end portion of said U-shaped support member each engaging and magnetically retaining gauging wires in contact with a screw thread, gear and the like positioned therebetween.
Dependencies are inferred from the claim text.