The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1982
Filed:
Oct. 31, 1980
Stafford M Ellis, Sussex, GB;
Elliott Brothers (London) Limited, Chelmsford, GB;
Abstract
According to the present invention a sight unit, for an headgear comprises a mount member adapted to be secured to the headgear, an arm member pivotally connected to the mount member, a collimating sight carried by the arm member, and, a substantially flat display surface a virtual image at infinity of which is to be formed by the collimating sight and in which the arm is pivotal between an operative position at which when the headgear is being worn the sight intercepts the wearer's forward line of sight to the distant scene and a stowed position at which the sight does not intrude into the wearer's field of view to the forward distant scene, and no part of the arm or the sight has a transverse dimension greater than a prescribed human interpupillary distance, wherein the said display surface is secured to the mount member and when the arm is at the operative position the sight defines an optical axis which intercepts the display surface perpendicular thereto.