Cast bell motor drive system and method
AssigneeSchulmerich Carillons, Inc.
InventorRichard E. Mattern
Life of this patent
Estimating the term…
Abstract
A motor drive system and method for driving a cast bell or similar object, comprising a motor and cam switches driven by the motor which operate relays in accordance with a duration angle and a start angle respectively, the circuit of the drive system supplying power to normally provide drive energy to the bell when it is swinging through the duration angle, and to provide power to the bell following system initiation as long as the bell is within the start angle. The start angle is set to be greater than the duration angle so as to optimize steady state power delivery while ensuring power delivery at the time of initial system energization.
Claims10
An electric drive system for driving a bell or like object, the system having an electric motor operatively connected to said bell for supplying drive energy and a circuit for controlling said motor,
- duration means operatively connected to said motor for defining a motor drive duration angle through which said motor drives said bell and duration switch means connected in said circuit for switching power to said motor as long as it is within said duration angle,
- direction means operatively connected to said motor for sensing the direction of bell movement and direction switch means connected in said circuit for switching electric energy to drive said bell in the sensed direction,
- start means operatively connected to said motor for starting said motor, said start means having start angle means for defining a start angle greater than said duration angle, and
- said start means further having start switching means connected in said circuit for switching power to said motor only when said drive system is initially energized and said bell is within said start angle.
A method of controlling the electric drive of a bell, said method having improved means for ensuring the startup of said bell drive, comprising,
- defining a duration angle corresponding to the swing of said bell, and normally driving said bell only when it is positioned within said duration angle,
- defining a start angle greater than said duration angle, and at startup applying energy to said motor as long as said bell is within said start angle, and thereafter applying energy to said motor only when said bell is within said duration angle.
Dependencies are inferred from the claim text.