Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
John Richards
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of GB190826938ApublicationCriticalpatent/GB190826938A/en
Length-Measuring Instruments Using Mechanical Means
(AREA)
Abstract
26,938. Richards, J. Dec. 11. Levelling-staves.-In a measuring-rule for the use of miners, surveyors, builders, &c., two or more members a, a', capable of sliding upon one another longitudinally, are secured together by tie-plates b, b<1>, and the member a<1> is provided with a feather c engaging a corresponding groove c<1> formed in the member a. In order to prevent separation of the members by over-sliding when being returned to their closed position, the groove c<1> terminates a short distance from the top of the member a, the extremity of the groove being protected by a small metal plate, while the feather c terminates a short distance from the top of the member a'. The members a, a<1> are clamped in any required position by means of a set-screw e, which passes through the tie-plate b<1> and through a metallic boss in the member a, its point entering the groove c'. A suitable scale may be marked upon the member a.
GB190826938D1908-12-111908-12-11Improvements in Measuring Rules for the use of Miners Surveyors, Builders and the like
ExpiredGB190826938A
(en)