US3708046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically controlled brake
Assignee: Individual
•
Filing: 1970-09-23
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Granted: 1973-01-02
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Expires: 1990-09-23
Abstract
Abstract In this electrically controlled brake mechanism, a brake shoe, which normally gravitates to a braking position in engagement with a pulley wheel, so as to hold the wheel against turning when electrical power is turned off, or in the event of electrical power failure, is pivotally connected at its mid-point to one end of a link guided to move endwise tangentially relative to the circumference of the pulley wheel so that the brake shoe is retracted and allows free turning of the pulley wheel when the power is turned on, the link being operatively connected at its other end with the plunger of an electrical solenoid that is energized only when the main control switch is turned on for either forward or reverse operation of the drive motor. The motor circuit is not completed, however, until a servo-switch, that is normally in open circuit position, is thrown to closed circuit position by plunger operation of the aforesaid link. Thus, the motor does not start until a split second after the brake is released, which saves wear and tear on both the motor and the brake shoe. The combined weight of the link, the plunger, and the brake shoe assure good braking action, especially in view of the efficient angle of the downward substantially tangential travel of the shoe relative to the wheel to braking position. The compactness of the mechanism usually permits installation on the free side of a belt-driven pulley wheel.
Inventors
- 👤 H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
B; B66; B66D; B66D5/00; F; F16; F16D; F16D49/00; B66D2700/00; B66D2700/03; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
198 words
In an electrically controlled brake mechanism the combination with a drive pulley and a driven pulley wheel drivingly connecTed by a belt, and an electric motor connected for transmitting drive to the drive pulley, of a brake shoe disposed in braking relationship to the pulley wheel on the free side thereof relative to the belt, an electrical solenoid having a plunger that is operatively connected with the brake shoe to gravitate and move the shoe in one direction to braking position with power off and the solenoid deenergized but move the shoe oppositely to retracted position relative to the pulley wheel when the solenoid is energized with power on, means whereby the shoe upon application of the brake moves downwardly with the plunger on a line substantially tangent to the pulley wheel for a binding action in the application of the brake, the combined weight of the plunger and shoe applying the brake, a main switch for connecting said motor to a source of electric current supply, and a normally open servo-switch electrically connected with the solenoid and main switch and source of electric current supply and mechanically operable to closed position by solenoid operation of the plunger.
Claim 2
Dependent Claim
198 words
In an electrically controlled brake mechanism the combination with a drive pulley and a driven pulley wheel drivingly connecTed by a belt, and an electric motor connected for transmitting drive to the drive pulley, of a brake shoe disposed in braking relationship to the pulley wheel on the free side thereof relative to the belt, an electrical solenoid having a plunger that is operatively connected with the brake shoe to gravitate and move the shoe in one direction to braking position with power off and the solenoid deenergized but move the shoe oppositely to retracted position relative to the pulley wheel when the solenoid is energized with power on, means whereby the shoe upon application of the brake moves downwardly with the plunger on a line substantially tangent to the pulley wheel for a binding action in the application of the brake, the combined weight of the plunger and shoe applying the brake, a main switch for connecting said motor to a source of electric current supply, and a normally open servo-switch electrically connected with the solenoid and main switch and source of electric current supply and mechanically operable to closed position by solenoid operation of the plunger.
Claim 3
Dependent Claim
93 words
The combination as set forth in claim 1 including a link that is movable on a line parallel to a tangent relative to the circumference of said pulley wheel said link being operatively connected for reciprocation at one end to said plunger and connected at its other end to said brake shoe and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 4
Dependent Claim
105 words
The combination as set forth in claim 1 including a link that is movable on a line parallel to a tangent relative to the circumference of said pulley wheel and inclined relative to a vertical outwardly with respect to said wheel, said link being operatively connected for reciprocation at one end to said plunger and connected at its other end to said brake shoe, and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 5
Dependent Claim
118 words
The combination as set forth in claim 1 including a link that is movable on a line parallel to a tangent relative to the circumference of said pulley wheel, said link being operatively connected for reciprocation at one end to said plunger and connected at its other end to said brake shoe, and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned, the servo-switch being so disposed relative to one of said links for operation thereof to closed position in the retracting movement of the brake shoe.
Claim 6
Dependent Claim
107 words
The combination as set forth in claim 1 including a link that is movable on a line parallel to a tangent relative to the circumference of said pulley wheel, said link being operatively connected for regiprocation at one end to said plunger and pivotally connected at its other end to the mid-point of said brake shoe, and a second link pivotally connected at one end to the shoe and last named end of said first mentioned link at their pivotal connection with one another and pivoted at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 7
Dependent Claim
136 words
The combination as set forth in claim 1 including a link that is movable on a line parallel to a tangent relative to the circumference of said pulley wheel, said link being operatively connected for reciprocation at one end to said plunger and pivotally connected at its other end to the mid-point of said brake shoe, and a second link pivotally connected at one end to the shoe and last named end of said first mentioned link at their pivotal connection with one another and pivoted at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned, the servo-switch being so disposed rElative to the movable outer end of said second link for operation thereof to closed position in the retracting movement of the brake shoe.
Claim 8
Dependent Claim
54 words
The combination as set forth in claim 1 wherein said electric motor is reversible and the main switch is so connected electrically with the motor, servo-switch and solenoid that in either on position of the main switch the solenoid is energized to cause the plunger to retract the brake shoe and close the servo-switch.
Claim 9
Dependent Claim
140 words
In combination with a driven wheel and an electric motor connected to transmit drive to said wheel, an elongated brake shoe movable substantially endwise into and out of braking relationship to said wheel, the movement into braking position being by gravity, an electrical solenoid having a plunger that is operatively connected with the brake shoe to gravitate and move with the shoe by gravity to braking position with power off and the solenoid deenergized but move the shoe substantially endwise to retracted position relative to the wheel when the solenoid is energized with power on, a main switch for connecting said motor to a source of electric current supply, and a normally open servo-switch electrically connected with the solenoid and main switch and source of electric current supply and mechanically operable to closed position by solenoid operation of the plunger.
Claim 10
Dependent Claim
140 words
In combination with a driven wheel and an electric motor connected to transmit drive to said wheel, an elongated brake shoe movable substantially endwise into and out of braking relationship to said wheel, the movement into braking position being by gravity, an electrical solenoid having a plunger that is operatively connected with the brake shoe to gravitate and move with the shoe by gravity to braking position with power off and the solenoid deenergized but move the shoe substantially endwise to retracted position relative to the wheel when the solenoid is energized with power on, a main switch for connecting said motor to a source of electric current supply, and a normally open servo-switch electrically connected with the solenoid and main switch and source of electric current supply and mechanically operable to closed position by solenoid operation of the plunger.
Claim 11
Dependent Claim
92 words
The combination as set forth in claim 8 including a link that is movable on a line parallel to a tangent relative to the circumference of said wheel, said link being operatively connected for reciprocation at one end to said plunger and connected at its other end to said brake shoe, and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 12
Dependent Claim
108 words
The combination as set forth in claim 8 including a link that is movable on a line parallel to a tangent relative to the circumferenc of said wheel and inclined relative to a vertical outwardly with respect to said wheel, said link being operatively connected for reciprocation at one end to said plunger and pivotally connected at its other end to a mid-point of said brake shoe, and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 13
Dependent Claim
117 words
The combination as set forth in claim 8 including a link that is movable on a line parallel to a tangent relative to the circumference of said wheel, said link being operatively connected for reciprocation at one end to said plunger and connected at its other end to said brake shoe, and a second link pivotally connected at one end to the last named end of said first mentioned link and at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned, the servo-switch being so disposed relative to one of said links for operation thereof to closed position in the retracting movement of the brake shoe.
Claim 14
Dependent Claim
106 words
The combination as set forth in claim 8 including a link that is movable on a line parallel to a tangent relative to the circumference of said wheel, said link being operatively connected for reciprocation at one end to said plunger and pivotally connected at its other end to the midpoint of said brake shoe, and a second link pivotally connected at one end to the shoe and last named end of said first mentioned link at their pivotal connection with one another and pivoted at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 15
Dependent Claim
106 words
The combination as set forth in claim 8 includ a link that is movable on a line parallel to a tangent relative to the circumference of said wheel, said link being operatively connected for reciprocation at one end to said plunger and pivotally connected at its other end to the mid-point of said brake shoe, and a second link pivotally connected At one end to the shoe and last named end of said first mentioned link at their pivotal connection with one another and pivoted at its other end to a fixed support to guide the first link and shoe for movement on the line mentioned.
Claim 16
Dependent Claim
54 words
The combination as set forth in claim 8 wherein said electric motor is reversible and the main switch is so connected electrically with the motor, servo-switch and solenoid that in either on position of the main switch the solenoid is energized to cause the plunger to retract the brake shoe and close the servo-switch.
Claim 17
Dependent Claim
168 words
In combination, an electric motor, a wheel driven thereby, a control switch, said motor having a servo-switch that is normally in open circuit position and connected in circuit with the motor and control switch to complete the circuit through the motor when closed, a solenoid connected with the control switch to be energized when the latter is closed, a gravitating plunger movable in one direction against gravity when the solenoid is energized, a brake element connected to and movable with said plunger and operatively associated with the aforesaid wheel, the brake element being normally held by its gravity and that of said plunger in braking position but operable against gravity to retracted position upon energization of said solenoid, and means guiding said plunger in its substantially endwise movement to retracted position by said plunger and in a direction substantially parallel to a tangent to said wheel, said servo-switch being also connected mechanically so as to be operable to closed position by said plunger upon energization of said solenoid.
Claim 18
Dependent Claim
168 words
In combination, an electric motor, a wheel driven thereby, a control switch, said motor having a servo-switch that is normally in open circuit position and connected in circuit with the motor and control switch to complete the circuit through the motor when closed, a solenoid connected with the control switch to be energized when the latter is closed, a gravitating plunger movable in one direction against gravity when the solenoid is energized, a brake element connected to and movable with said plunger and operatively associated with the aforesaid wheel, the brake element being normally held by its gravity and that of said plunger in braking position but operable against gravity to retracted position upon energization of said solenoid, and means guiding said plunger in its substantially endwise movement to retracted position by said plunger and in a direction substantially parallel to a tangent to said wheel, said servo-switch being also connected mechanically so as to be operable to closed position by said plunger upon energization of said solenoid.
Claim 19
Dependent Claim
49 words
The combination set forth in claim 15 wherein the electric motor is reversible and the control switch is operable in one direction for forward drive and in another direction for reverse drive, said solenoid being energized upon closing of said switch regardless of which direction of drive is selected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |