Abstract: Apparatus for testing metal detecting apparatus employs a test piece of representative metal which is passed through a section of the electromagnetic field of the metal detecting apparatus to record a response signal as if metal has been detected. The testing apparatus comprises the test piece and a housing for the test piece which extends through said section of the electromagnetic field and acts to guide the test piece along its path, said movement of the test piece causing distortion of the electromagnetic field and actuation of the detecting mechanism to give the required signal. Metal detecting apparatus may have the testing apparatus attached thereto or moulded integrally therewith.

Abstract: This invention is concerned with conveying and weighing of unit packages which are desired to be packed in predetermined weights and is particularly concerned with foodstuffs which are required by law or other rules to be sold in stated weight packages.The invention provides for a pair of storage conveyors which receive the foodstuffs from an intermittent source of supply of said foodstuff and which ensure a steady and uniform supply of the units of foodstuff to a weighing locality and which furthermore enable an operator to have a visual indication of the necessary make weight pieces of foodstuff in order to bring the packages up to the predetermined weight.