Emhart Industries, Inc.

Emhart Glass Machinery Investments Inc.

Emhart Zurich S.a.

Rene Keller

Steven G Merz

Carl W Schmitt

A piston rod of a piston and cylinder device has an axial bore through which a fixed non-ferromagnetic monitoring member extends, and a detection insert of ferromagnetic materially extending generally axially of the monitoring member. A magnetic circuit is created through a base of the cylinder, a sidewall, the piston and the detection insert, and movement of the piston is detected by a Hall sensor which detects a change of flux in the magnetic circuit.

Plunger mechanism with a Hall sensor movement detection device for a

The inspection apparatus comprises scanning means and processing means operative to produce a lean signal which indicates how much an article moving on a conveyor leans from the vertical. Comparing means is operative to compare the lean signal with a first preselected standard and a second preselected standard which is lower than the first preselected standard. If the first standard is exceeded, the article is rejected by first rejecting means and, if the second standard is exceeded the article may be rejected by second rejecting means downstream of the first after further information has been obtained about the article from inspection devices, or the second standard may be used to provide an indication of a trend towards leaning.

Inspection apparatus for inspecting articles moving on a conveyor

In the closing action of the mould, pulses are produced which represent the movement of a mould portion in the closing action. The number of pulses produced between a fixed position and the mould closed position is counted and compared with the greatest number of pulses previously counted for the corresponding movement. If the two numbers differ by a predetermined number, a stop signal is produced which presents further closing actions of the mould.

Apparatus for monitoring the closing action of a mould of a glassware

The positions of movable side portions (12,14) of a mould are monitored to determine whether the side portions reach their mould-closed condition. Ultrasonic radiation is transmitted from a first source (22) so that it is reflected by a first of the mould portions (12) to a first detector. Ultrasonic radiation is also transmitted from a second source (24) so that it is transmitted from the second mould portion (14) to a second detector. A signal is produced which is indicative of the time taken by the radiation to travel from the first source to the first detector plus the time taken by the radiation to travel from the second source to the second detector and the signal is compared with a standard representing the expected time for the radiation travel when the side portions are in their closed condition.

Method of monitoring the position of two movable side portions of a

Gobs of molten glass are sensed as they pass along a path (12) which leads to a mold arrangement (10) of a glassware forming machine. Ultrasonic radiation is transmitted towards a point on the path so that the radiation is reflected by the gob to a detector (30). One or more parameters of the radiation detected are compared with an equal number of expected parameters for the radiation and a signal indicating the presence of a gob is produced if the or each parameter is consistent with its equivalent expected parameter.

Method of sensing gobs of molten glass

The method is for monitoring the movement of a member which is moved along a path which has a vertical component and an arcuate component about a vertical axis. The movement is brought about by a piston movable in a cylinder and having a piston rod projecting therefrom on which the member is mounted. A cam which engages a cam track is mounted on the piston rod or a further piston rod of the piston and acts to cause the arcuate movement. The method comprises mounting a proximity detector on the cam track to sense the piston rod, connecting the proximity detector to a contactless connector so that signals are passed from the mechanism to a transmitter of the connector mounted on the machine frame, and comparing signals received by the transmitter with signals indicating the stage reached in the cycle of operation.

Method of monitoring the movement of a member in a glassware forming

The identification of a mold in which a vessel made from an optically transparent material has been molded. The vessel is provided with a plurality of marks disposed about a path on the wall of the vessel. There is a first set of marks disposed above the path and a second set disposed below the path. One of the first or second sets contains code marks for providing an indication of the mold and the other set contains timing marks suitable for the sequential reading of the code marks. The marks are illuminated by a light path as the vessel is moved and the diffraction or reflection of the light caused by the marks is evaluated. Time impulses are generated in response to the evaluation of the timing marks for sequential reading of the code marks.

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Zurich, Switzerland

Rene Keller