US3608847A

US3608847A - Electromechanical reel assembly attachment for a tape deck

Info

Publication number: US3608847A
Application number: US822999A
Authority: US
Inventors: Wayne T Hufford
Original assignee: Cherokee Electronics Co Inc
Current assignee: Cherokee Electronics Co Inc
Priority date: 1969-05-08
Filing date: 1969-05-08
Publication date: 1971-09-28
Anticipated expiration: 1988-09-28

Abstract

Apparatus which is used for rapidly increasing and controlling the speed and stopping rotating reels in a tape deck assembly. The speed of the rotating wheels being regulated by a system of motors and a braking system which is made effective by an electrical control system which is actuated by a mechanical switch. The mechanical switch being part of a console housing the tape deck.

Description

States Patent 1111 3,608,847

[72] lnventor WayneTJllulford [56] ReferencesCited Tulsa, Oklfl- UNITED STATES PATENTS 1 APPI-NO' 822,999 2,893,653 7/1959 Schultheisetal 242/209 [221 Flled MaY81969 2,985,395 5/1961 Hoehnetal. 242 204 [45] Patented Sept.28,l97l FOREIGN PATENTS [73] Assignee Cherokee Electronics Co.,llnc.

OklahomeCity,Okla. 6l3,522 [/1961 Canada 242/204 Primary ExaminerLeonard D. Christian Attorney-Ralph E. Zimmerman [54] ELECTROMECHANICAL REEL ASSEMBLY ATTACHMENT FORA TAPE DECK ABSTRACT: Apparatus which is used for rapidly increasing 2 Chums 3 Drawmg and controlling the speed and stopping rotating reels in a tape [52] U.S. Cl 242/204 deck assembly. The speed of the rotating wheels being regu- [Sl] lnLCl ..1B1lb 115/32, lated by a system of motors and a braking system which is G03b 1/04 made effective by an electrical control system which is actu- [50] Field all Search ..242/2042l0 ated by a mechanical switch. The mechanical switch being part of a console housing the tape deck.

PMENIEBSEPZWW 3,608,847

SHEET 1 OF 2 INVENTOR. WAYNEIHUFFORD ATTORNEY PATENTEU SEP28 i971 SHEET 2 OF 2 INVENTOR. WA YNE I. HUF F 0RD ATTORNEY ELECTROMECIIANICAL REEL ASSEMBLY ATTACHMENT FOR A TAPE DECK SUMMARY OF THE INVENTION The object of this invention is to provide an adequate braking and control system to control the movement of reels in a tape deck assembly.

Another object of this invention is to provide sufficient braking on the reels so as to prevent the tapes from becoming broken during the rewinding operation at high speed.

Still another object of this invention is to provide a system of braking which will operate equally well on either of two reels in a tape deck assembly depending on the direction of travel of the tape itself.

Another object of this invention is to make provision for instant stopping should a loss of power occur.

These and other objects of this invention are achieved by employing transistorized circuits in combination with electromechanical devices to perform the functions of this inven tion.

For a complete understanding of the nature and objects of this invention, reference should be made to the detailed description in connection with the schematic drawing and the other drawing portraying this invention.

FIG. 1 illustrates a view of the braking and control system in the tape deck assembly looking upwardly from the bottom of the assembly.

FIG. 2 illustrates the physical layout of the relay control for the electromechanical reel assembly.

FIG. 3 illustrates a schematic circuit diagram showing the arrangement of components required for the electrical operation of the electromechanical reel assembly.

Reference is made to FIG. 1 which shows the braking and control assembly 10 consisting of a pair of braking arms 1 and 1' with

springs

25 and 25 and

braking shoes

26 and 26 attached, a pair of friction drums 7 and 7 a pair of control levers 2 and 2' each with springs 27 and 27' and capstan idlers 15 and 15' attached, a pair of

stops

3 and 3 for stopping the movement of the control arms 2 and 2', the control arms 2 and 2' being positioned so as to make contact between rotating shafts 13 and 13 attached to torque motors 12 and 12' and the friction drums 7 mounted on shafts 14 and 14 and 7 respectively. The solenoid 5 with stop 5 is the means for actuating the movement of braking arms 1 and 1' around pivot points 8 and 8'. Solenoids 4 and 6 with stops 4 and 6' actuate the control arms 2 and 2'. Terminal block 28 is used for connecting the electric wires from the relay control shown in FIG. 2 to the

solenoids

4, 5 and 6, FIG. 1. Fast forward driving motors l1 and 11 shown as dotted lines are mounted directly over the rotating friction drums with rotating shafts 14 and 14' extending upwardly from the friction drums 7 and 7 through the driving motors 11 and 11 to reel

support hubs

29 and 29. Shafts 13 and 13 extending from the forward and the reverse torque motors shown as dotted lines 12 and 12 through the bottom surface deck 24 of the braking and control device, the shaft being positioned to contact the capstan idlers 15 and 15' on control arms 2 and 2'.

FIG. 2 portrays the physical layout of the relay control assembly 22 which controls the operation of the electromechanical tape deck reel assembly device. The relay control assembly comprises relays 16, 17, 18, 21, condenser 19, transformer 20, and plug 23. The balance of the relay control assembly is explained by a schematic diagram appearing in FIG. 3.

FIG. 3 portrays the circuit diagram for operating the electromechanical tape deck assembly. Power enters the circuit at P-9, passes through rlay I(-4l to transformer T-ll where the power is reduced from I /1 volts to 24 volts, the power is rectified by a full-wave rectifier composed of diodes D1, 2, 3 and 4, resistor R-1 and condenser C-1 and light bulb L-4 which indicates the presence of power in the line and acts as a buffer for any current fluctuation. The rectified power than passes through connector P-6 into plug P which is grounded at connector P-8; alternating current is fed into plug P at connectors P-2 and P-7. In operation, plug P is plugged into jack 1 which is connected to switches S-2, 5-3, and S-1 through the connectors .I-4l and .I-S which are connected in combination to switch S-2, connectors J-3 and J1 being connected to S3 and S1 respectively. Connectors .I-2 and .l-7 in jack .1 are connected into alternating current, connector 6, J is connected to the open side of switch 5-3, connector J-8, .I is the ground connection.

Reference is made to connector P-l, in plug P. Connector P-l, is connected to coil L-1, diode D5 and to coil L-2 and diode D7. Coil L-l and diode D-5 and coil L-2 and diode D7 being connected in parallel respectively and grounded at G-l. The current is fed from coil L-2 and diode D7 back to connector P-3, P. Reference is made to connector P-4l, plug P, connector P-4l, P1 feeds power to condenser C2, coil L-3 and diode D-6. Resistor R-Z is connected between connector P-1, P and ground G-2, while connector P-S, plug P is connected to the lead side of coil L3.

Reference is made to triple-pole double-throw relays K4, K-2 and double-pole double-throw relay l(3 which have a common connection to the normally closed switch when power is on through relay I(3. Relay I(4l is connected in series across one of the alternating current lead lines. Relay 1L4 feeds /115 volts alternating current to both triple-pole double-throw relays K-1 and 14-2 and double-pole doublethrow relay 14-3. The other lead wire feeds 1 10/1 15 volts alternating current to solenoid 2-1 at one terminal, the other terminal of solenoid Z1 receives its power from relay 14-1. Reverse torque motor M-1 and forward torque motor M-2 and fast forward drive motor M-3 all receive power into one terminal from lead wire W-l. Power is fed into the other terminal of motor M-1 from triple-pole doublethrow relay 14-2 shown in a normally closed position while power is fed into the other terminal of motor M-2 from triple-pole double-throw relay K-I shown in a normally closed position. Lead wire W-1 also feeds power into one terminal of fast forward drive motor M-3 and one terminal of solenoid Z-Z. The other terminal of the solenoid 2-2 and the other terminal of the motor M-3 are connected to the normally closed side of triple-pole doublethrow relay K-3. Lead wire W-l also feeds power to one terminal of solenoid Z3 and rewind drive motor Nil-41. The other terminal of solenoid 2-3 and motor M 1 are both connected to the normally open side of triple-pole double-throw relay K-1. K4 is a single-pole single-action relay connected to connector J2 and connector .l7 in the jack J.

OPERATION Reference is made solely to FIG. 3 in describing the operation unless otherwise indicated.

The system requires two different types of power to operate (1) 110/115 -volt alternating current to run the motors M-1, 2, 3 and 4 and relay I(4 FIG. 3, and (2) the rectifier supplies 24 -volt direct current to run the controls. The power to the

switches S1

2 and 3 is 24 -volt direct current. .I is a jack which is wired to switches S-1, 2 and 3. P is a plug which is inserted into .1 jack so that the individual numbered connectors in plug P correspond with similar holes in jack J as shown in FIG. 3. This is so that the switch means control on the tape recorder will control the operation of the electromechanical tape deck assembly.

To operate, insert P-9, FIG. 3 into 21 110/115 -volt source of alternating current and plug P, FIG. 3 into jack .1, FIG. 3. By turning the power on, the contact closes in the single-pole single-throw relay K-4l and admits 1 10/115 volts power into the system. The 110/1 l5-volt power is fed directly into certain components of the system, which shall be described more fully in the discussion which follows. The '24'volt direct current is developed by passing the 1 10/1 l5-volt alternating current through transformer T-1 to diodes D-l, D-2, 3 and A into the electronic control system.

Function 1. Place the switch S-l, FIG. 3 in closed position, or PLAY. When switch S-1, FIG. 3 is closed, relay [(-2 is energized and contacts 7-1, K-2 change to position 7-4, K-2 and 8-2, K-2 changes to position 8-5 K-2. K-2 relay closes permitting ll/l15 volts alternating current to pass through contact 4, K-2 to contacts 8-5 K-3, normally closed, then to fast forward drive motor M-3 and solenoid Z-2. Solenoid Z-2 actuates the mechanical mechanism 2, FIG. 1, to engage shaft 13, FIG. I, with the idler 15, FIG. 1. Power is also applied from

contacts

7 and 8, K-2 to contacts 9-3, 8-5, and 7-4, K-l. The power from contact 9, K-2 which passes to contact 9-3, which is normally closed applies power to the forward torque motor shown as M-2. The shaft 13, FIG. 1 extends from motor M-2. Power is supplied from contact 9, K-l to brake solenoid Z-l which is also shown as 5, FIG. 1. The actuation of the brake solenoid Z-l holds both

brakes

1 and 1, FIG. 1, away from friction drums 7 and 7', FIG. 1.

The 24-volt direct current through S-l plug P and jack .1 being connected is applied through connector 1-1 to connector P-1, plug P, to resistor R-2, and condenser C-2, K-3 being in parallel with each other. This causes a delay in the operation of approximately one-half second in energizing K-3 at the end of which time alternating current is applied from contacts l-3, K-3 to the reverse torque motor M-l. At this interval, contacts 8-5 [(-3 change position to 8-6, K-3 due to the action of coil L-3 and the power flowing through contact 5, K-3 is cut off. At this point, the driving power to motor M-3 and the power to solenoid Z-2 is cut off, torque motors M-1 and M-2 both continue to run at the normal speed of the motors.

Function 2. Place the switch S-2, to FAST FORWARD POSITION. Switch Z-2, is normally in a closed position. Opening the switch S-2, opens the circuit between

connectors

4 and 5, and consequently, opens the circuit in K-3 by deenergizing L-3. Contacts l-3, K-3 open, returning the relay from position l-3, K-3 to position 14, K-3. This removes the power to torque motor M-l. At the same time, positions 8-6 K-3 change to position 8-5, K-3, applying power to the fast forward drive motor M-3 and solenoid Z-2. Solenoid Z-2 causes control arm 2, FIG. 1, to position the capstan idler 15, FIG. 1 in contact with the fast forward friction drum and the capstan shaft 13, FIG. 1. This releases the tension of the tape between the takeup reel and the reel feeding the tape.

Function 3. Place the mechanical switch to the STOP position. S-l is now open, power is discontinued to relay K-2, coil L-I is deenergized, contacts 7-4, K-2 return to position 7-1, K-2 contacts in position 8-5, 14-2 return to position 8-2, K-2, contacts in position 9-6, K-2 return to position 9-3, K-l Brake solenoid Z-l is deenergized and power to the forward torque motor M-2 is discontinued. The brake springs which are attached individually to each of the brake arm members 1 and 1', FIG. 1 when the solenoid Z-l is deenergized cause the brakes to engage with friction drums 11 and 11' which in turn will bring the friction drums 11 and 11 to a stop.

The system also provides for a safety feature of instant stopping of the movement of the reels should there be a power failure. This is accomplished by release of the brake arms 1 and 1', FIG. 1, to a closed position when the solenoid 5, FIG. 1, is deenergized.

I claim:

I. An electromechanical tape deck reel assembly, the combination of which comprises a. a source of electrical power, with electrical means for energizing,

b. a first electrical motor means for rotatably driving a first reel support hub, I

l. the said first motor means having a first shaft extending in a downwardly direction from the said first driving motor means,

2. the said first shaft having a first friction drive drum attached thereto on the said first shafts lower extremity,

c. -a second electric motor means for rotatably driving a second reel support hub,

l. the second electrical motor means having a second shaft extending downwardly and aligned approximately parallel to the said first shaft of the said first electric motor means,

2. said second shaft having a second friction drive drum attached thereto on the said second shafts lower extremity,

. a third electrical motor means with a third shaft attached extending downwardly for rotatably driving a first capstan idler pivotally mounted on the extremity of a first control lever,

e. a fourth electrical motor means with a fourth shaft attached extending downwardly for rotatably driving a second capstan idler pivotally mounted on the extremity of a second control lever,

f. a first solenoid to actuate the said first control lever, so as to make contact between the said first friction drive drum, the said first capstan idler and the said third shaft attached to the third said motor means,

g. a second solenoid to actuate the said second control lever, so as to make contact between the said second friction drive drum, the said second capstan idler and the said third shaft attached to the third said motor means,

1. the said first and second solenoid being connected to the said first and second control lever respectively by spring means,

h. a first and second brake arm with brake shoes attached,

the said brake arms being pivotally mounted,

i. a third solenoid to actuate simultaneously the said first and second brake arms with brake shoes attached, the said brake shoes being aligned with the periphery of the said first and second friction drum, for simultaneously braking the said first and second friction drums.

2. The electromechanical tape deck reel assembly as claimed in claim 1 where the said electrical means for energizing the electrical operation of the said tape deck assembly includes, in combination a. the said power supply means to a jack connector and to a transformer,

l. the said jack connector being connected to a plug,

2. and to switching means having a first, second and third position,

b. a first, second, third and fourth relay with associated contacts and circuit means,

1. and a first, second and third time delay circuit associated with the said second, third and fourth relays respectively,

2. the said contact in the said first relay being coupled through circuit means with the said plug to control the energy input into the said transformer,

3. the said transformer feeding electrical energy at a reduced voltage to electrical rectifying means,

4. the said electrical rectifying means through the said circuit means feeding reduced voltage to the said first, second and third time delay circuit in the said second, third, and fourth relays respectively,

c. wherein the said switching means in the said first position is manually actuated to a closed position, the said power energizing the said first, second and third motor means and the said first and second solenoid through contacts positioned in a normally closed first position in the said second, third and fourth relays, the said first, second and third time delay circuits actuating and repositioning the said contacts to a second position in the said second, third and fourth relay respectively so as to discontinue electrical energy to the said third electric motor means and the said second solenoid and continue to feed electrical energy to the said first and second electrical motor means and third said solenoid,

d. wherein the said switching means in the said second position is manually actuated to an open position deenergizing the said first time delay circuit in the said second relay, the said contacts repositioning in said second relay normally closed first position,

3. which deenergize the circuit means to the said first, second, third and fourth electric motor means and to the said first, second and third solenoid,

4. the said third solenoid releasing the said first and second brake arms,

5. the said brake arms contacting the said first and second friction drum.

Claims

1. An electromechanical tape deck reel assembly, the combination of which comprises a. a source of electrical power, with electrical means for energizing, b. a first electrical motor means for rotatably driving a first reel support hub, 1. the said first motor means having a first shaft extending in a downwardly direction from the said first driving motor means, 2. the said first shaft having a first friction drive drum attached thereto on the said first shaft''s lower extremity, c. a second electric motor means for rotatably driving a second reel support hub, 1. the second electrical motor means having a second shaft extending downwardly and aligned approximately parallel to the said first shaft of the said first electric motor means, 2. the said second shaft having a second friction drive drum attached thereto on the said second shaft''s lower extremity, d. a third electrical motor means with a third shaft attached extending downwardly for rotatably driving a first capstan idler pivotally mounted on the extremity of a first control lever, e. a fourth electrical motor means with a fourth shaft attached extending downwardly for rotatably driving a second capstan idler pivotally mounted on the extremity of a second control lever, f. a first solenoid to actuate the said first control lever, so as to make contact between the said first friction drive drum, the said first capstan idler and the said third shaft attached to the third said motor means, g. a second solenoid to actuate the said second control lever, so as to make contact between the said second friction drive drum, the said second capstan idler and the said third shaft attached to the third said motor means, 1. the said first and second solenoid being connected to the said first and second control lever respectively by spring means, h. a first and second brake arm with brake shoes attached, the said brake arms being pivotally mounted, i. a third solenoid to actuate simultaneously the said first and second brake arms with brake shoes attached, the said brake shoes being aligned with the periphery of the said first and second friction drum, for simultaneously braking the said first and second friction drums.

2. the said first shaft having a first friction drive drum attached thereto on the said first shaft''s lower extremity, c. a second electric motor means for rotatably driving a second reel support hub,

2. the said second shaft having a second friction drive drum attached thereto on the said second shaft''s lower extremity, d. a third electrical motor means with a third shaft attached extending downwardly for rotatably driving a first capstan idler pivotally mounted on the extremity of a first control lever, e. a fourth electrical motor means with a fourth shaft attached extending downwardly for rotatably driving a second capstan idler pivotally mounted on the extremity of a second control lever, f. a first solenoid to actuate the said first control lever, so as to make contact between the said first friction drive drum, the said first capstan idler and the said third shaft attached to the third said motor means, g. a second solenoid to actuate the said second control lever, so as to make contact between the said second friction drive drum, the said second capstan idler and the said third shaft attached to the third said motor means,

2. and to switching means having a first, second and tHird position, b. a first, second, third and fourth relay with associated contacts and circuit means,

2. to reposition the said contacts in the said first, second and third relay from the said second position to the said normally closed first position,

4. the said electrical rectifying means through the said circuit means feeding reduced voltage to the said first, second and third time delay circuit in the said second, third, and fourth relays respectively, c. wherein the said switching means in the said first position is manually actuated to a closed position, the said power energizing the said first, second and third motor means and the said first and second solenoid through contacts positioned in a normally closed first position in the said second, third and fourth relays, the said first, second and third time delay circuits actuating and repositioning the said contacts to a second position in the said second, third and fourth relay respectively so as to discontinue electrical energy to the said third electric motor means and the said second solenoid and continue to feed electrical energy to the said first and second electrical motor means and third said solenoid, d. wherein the said switching means in the said second position is manually actuated to an open position deenergizing the said first time delay circuit in the said second relay, the said contacts repositioning in said second relay to the said first normally closed position, the said circuit means energizing the said second solenoid and the said third motor means, e. wherein the said switching means in the said third position is manually actuated to a closed position,

4. the said third solenoid releasing the said first and second brake arms,

5. the said brake arms contacting the said first and second friction drum.