John H. Macneill (Total 74 Patents Found)

A pay telephone station having a lower housing coin chute (14) which is provided with a coin fraud prevention unit (10) in the form of a thin base (15) arranged in a slot (11) of a coin channel cover plate (12). The base (15) is provided with a pawl (23) having a tooth (24) with a chamfered face ( b 25) which is biased...
A locking pin for retaining a body on a drilled shaft or stud has a first straight section the end of which passes through the aperture in the stud. Opposite the aforesaid end the straight section terminates in a long sweeping 270° section that straightens out into a leg of a U-shaped section having two legs lying ast...
A matrix printer having electrically energizable circular coils spaced along and wound around a cylindrical center pole, styli wires of different lengths which are attached to the coils and extend substantially parallel to the center pole, permanent magnets, and pole members for providing paths for the magnetic lines o...
A retainer member uses a simply curved surface to engage the yoke-receiver handset juncture. The retainer member includes a top portion which matches the handset receiver circuitry and includes end portions that engage the substantially circular receiver portion of the handset to provide a further distribution of appli...
A pay telephone station having a lower housing coin chute (14) which is provided with a coin fraud prevention unit (10) in the form of a thin base (15) arranged in a slot (11) of a coin channel cover plate (12). The base (15) is provided with a pawl (23) having a tooth (24) with a chamfered face (25) which is biased in...