Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2000-06-19
2001-12-25
Mullins, Burton S. (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S07500D, C310S078000, C070S189000
Reexamination Certificate
active
06333574
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a system for powering a self powered lock while providing pulse signals to control the entry of the combination into the lock electronics.
BACKGROUND OF THE INVENTION
Self powered locks have been known for some time. The self powered locks have been of two general types. A first type has been where the power is provided by movement of a member such as a knob or handle which causes generation of power and the entry of the combination by either a key or card carrying a code. The generation of power is separate from the code entry device.
The other type of such self powered lock is exemplified by the lock disclosed in U.S. Pat. No. 5,061,923 issued to Miller et al. In this type lock the same mechanism is used for generation of power for the lock and for the creation of the electronic pulses.
The Miller et al. lock has a permanently engaged drive from a dial to a stepper motor which outputs voltage pulses in both directions of rotations and provides the same pulses to the microprocessor for purposes of entering the combination into the lock or controlling the functions of the lock.
OBJECTS OF THE INVENTION
The object of the invention is to provide an improved powering and combination entry mechanism and drive for an electronic lock.
Another object of the invention is the separation of the power generation function from the data entry or combination function of an electronic lock while maintaining a single operator engagable member.
A further object of the invention is the separation of the power generation function from the data entry function of the electronic lock while requiring only a single motion, dialing.
SUMMARY OF THE INVENTION
An electronic lock is disclosed which has a dial which is rotatable in a first direction to provide power for lock operation. The dial also may be used to enter the combination to open the lock. When the dial is rotated in a clock-wise direction the generator is driven through a one-way clutch such as a sprag clutch or a ball and spider plate clutch. Rotation in the counter clock-wise direction will disengage the clutch and disconnect the drive of the generator.
The rotation of the dial in a counter clock-wise direction not only disengages the clutch driving the generator but also engages a one way clutch which connects to and drives a second stepper motor or pulse generator. The pulse generator is typically a small stepper motor which, due to reduced power generation requirements, does not require a large volume and which may be more easily driven by the operator while providing reliable pulse output. The smaller forces necessary to drive the pulse generator allows finer control of the input of the combination to open the lock and ease of operation.
REFERENCES:
patent: 3733861 (1973-05-01), Lester
patent: 4311331 (1982-01-01), Lutz
patent: 4437552 (1984-03-01), Toyama
patent: 5056633 (1991-10-01), Noel
patent: 5493882 (1996-02-01), Jasper
Clark Thomas R.
Dawson Gerald L.
Redden James P.
Arent Fox Kintner & Plotkin & Kahn, PLLC
Hill Rustan J.
Kaba Mas Corporation
Mullins Burton S.
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