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:
Mar. 02, 1976
Filed:
Sep. 17, 1974
Marvin Menzin, Lexington, MA (US);
Hugh A Robinson, Wenham, MA (US);
Peters and Company, Inc., Dorchester, MA (US);
Abstract
Self-leveling dispenser of the type having an elongated lever which serves to balance the spring and platform, with a member being adjustable along the lever for altering the ratio of effective moment arms to change the effective spring rating of the dispenser. An adjustment feature comprises felxible strands connected to opposite sides of the adjustable member. By means of a pulley surface, both strands leave the lever at the pivot point and proceed to a take-up pay-out device, shown as a dentent-controlled reel. For avoiding working against the spring during adjustment the lever concavely curves about the line of action of a tension spring acting upon the lever. In combination of these features the strands are guided by longitudinally convex surfaces of the curved member. The platform and spring loads are shown to act in one diagonal direction of a rectangular frame with the frame braced by a tension member extending in the opposite diagonal direction.