A recording controller of the type receiving an electrical measurement input signal and being arranged to generate a pneumatic output control signal for a pneumatically controlled element. When the controller receives an electrical measuring signal from a process detecting element, the servomotor of a balancing mechanism rotates to establish a balance, causing a measurement pointer to indicate the measured value on a scale, and causing a recording pen to record it on a chart. Any deviation betwe...

A recording sheet comprising a support having thereon a color developer layer capable of reacting with a color former to form a color image, which color developer layer comprises (1) an acidic polymer and (2) an organic carboxylic acid or a metal salt thereof.

A recording material which is produced through the reaction of two kinds of color formers, namely a metallosilane compound and a polyhydroxyphenol. According to the invention, clearly printed, typed or handwritten letters or figures are easily formed on a substrate, with an excellent fastness against light, heat, water, and chemicals, and with an excellent color tone.

A recording sheet which comprises a layer of a color developer which forms a color image upon contact with a color coupler, said layer containing at least one metal compound of an aromatic carboxylic acid and a surface active agent is disclosed.

The recording medium is preferably a drafting film which has been printed with dark ink, and recording is accomplished in the preferred embodiment by selectively removing the ink using a fine stream of abrasive particles. These abrasive particles impinge on the recording medium to produce a record on the medium. The expended abrasive and ink residue is removed by a collection apparatus, including a vacuum manifold and a pressure manifold, which deposits the abrasive and residue in a collection c...

A discharge recording blank comprises a paper backing having a conductive surface formed by a base coating of conductive powdered carbon, and an outer powdered coating formed on the conductive surface. The outer powdered coating consists of nonconductive finely divided powder such as resin powder and/or pigment powder which is selected from white, gray or colored organic or inorganic pigment. The outer powdered coating is removed in localized areas in response to applied electric signals so as t...

A recording material of a polymeric film comprising a polymeric film such as a polyester film and a layer of a bleachable dye such as a triphenylmethane type dye. The dye layer can be bleached with a writing instrument containing a bleaching agent to give a transparent clear drawing. The material is useful for overhead projection to give a clear image that is easy to see.

A recording time clock whose housing has an orifice for insertion of a time card and another orifice in which a punched coding plate may be inserted. A reading device reads the code of perforations in the coding plate and sets a code printing wheel in the printing mechanism of the clock for printing a code symbol simultaneously with the hour and minute on an inserted time card.

A thermograph for automatically recording variations of temperature correlated with the passage of time and characterized by a light weight and durable construction protectively combined with a shipping container which serves as a housing enclosing the instrument while exposing a heat transfer element for quick response and a direct recording of prevailing temperature upon a chart. The instrument is a permanent and reuseable unit that is carried within the expendible shipping container to produc...

A recording stylus comprising a metal blade having a stem portion and a stylus point at one end, a second metal blade adjacent said stem portion and a resilient material between the two metal portions forming an adhesive bond between them.