US1496567A - Phonograph - Google Patents

Description

June 3 1924.

1,496,567 E. .J. TOMLINSON PHONOGRAPH Original il pril '7, 1919 3 SheetsShee.t 1

INVENTOR EDWARD J-TOMLINSON er Z77? A TTORNE June 3 139214. 1,496,567

E. J. TOMLINSON PHONOGRAPH Original Fil April 7, 1919 5 Sheets-Sheet 2 INVENTOI? EDWARD 'JOTOMLINSON June 3 1924. 1,496,567

E. J. TOMLINSON PHONOGRAPH Original Filed April 7, 1919 s Sheets-Sheet s INVENTOR How/n20 d.Tom.mso-

A TTOBNE g of magnets to act successively on pole pieces.

Patented-June 3, 1924.

UNITED STATES PATENT, OFFICE.

I EDWARD J. TOMLINSON, OF SUMMERFORD, OHIO, ASSIGNOR TO SPLI'IIDOBF ELECTRI- CAL COMPANY, OF NEWARK, NEW JERSEY.

PHONOGBAPH.

Original application filed April 7, 1919, Serial llb. 288,886. Divided and this application filed March 2, 1922. Serial No. 540,446.

To all whom it may concern:

Be it known that I, EDWARD J. TOMLIN- son, a citizen of the United States, residing at Summerford, in the county of Madison, State of Ohio, have invented certain new and useful Improvements in Phonographs, of which the following is a description, reference being had to the accompanying draw ing ,and to the figures of reference marke thereon.

.This invention relates to electrically. operated phonographs and as illustrated is particularly adapted for playing a record in the form of a flat disk or plate.

This application is a division of my application, Serial No. 288,386, filed'April'7, 1919.

It is the principal object of my invention to provide a phonograph in which the sound record body is carried on a support electrically driven in such a manner as to insure a constant speed and quietness of operation. In certain types of motors now in use more or less noise is produced by them which is' a detriment to the production of the best results from the playing of the record.

Another ob ect of my invention is to secure the above resultswith a motor mechanism that is very simple in construction and highly efficient in its operation, consuming a small amount of current. Heretofore it has been customary to use one or more pairs attached to the rotating support for the sound record body, but my invention is particularly directed to means for making all of the armature bodies or pole pieces do work simultaneously instead of concentrating this work intoa pair of pole pieces. I Figure 1 is a bottom view of the motor frame, but with the timer parts removed.

Figure 2 is a View of the timer parts and mechanism-not shown in Fig. 1 but on an enlarged scale to illustrate them more clearly. This figure also shows diagrammatically wiring of the motor.

Figure 3 is a part elevation of the phonograph motor.

Figure 4 is a sectional view through the operating electromagnet and core. 'Figure 5 is a plan view of the governor device shown in Fig. 3.

Figure 6 is a side elevation of a modifiedgovernor device somewhat similar to that shown in Figs. 3 and 5.

Figure 7 is a plan view of the stationary base member showing the pole pieces, bracket member and bearing for the rotatable support which is shown in Fig. 8.

Figure 8 is a bottom View of the rotatable support.

Figure 9 is a fragmentary section on the line 1010 of Fig. 8.

Figure 10 shows an alternative form of pole piece which may be used in place of that shown in Fig. 9; while Figure 11 is a fragmentary bottom View of F i 10.

Re erring now to the details wherein like numbers iefer to corresponding parts in the various views, 1 is a mounting plate having a central opening 2 within which is positioned a base member 3, the same being fastened to the plate 1 through the medium of arms 4 adapted to have screws or bolts pass through the holes 5 in the arms 4. On one side of the plate or base 3 is disposed a. series of pole pieces 6 which preferably correspond in number and shape to pole pieces 7 that are carried on the rotatable support member 8. As shown in Figure 9,

the pole pieces 6 and 7 are elongated as indicated at 9, in order to present a lar or surface for the magnetic flux lines. he type of pole pieces used on the base 3 or as armature bodies 7 on the rotatable support 8, may be of the laminated type as shown in Figure 10 wherein the laminations 10 are are welded as at 11 to either the base 3 or the support 8. It will be understood that the base 3 and support 8 may or may not be of a laminated construction, depending on requirements. Where the base 3 is made of a casting a central hub 12 is preferably cast integral therewith. The hub 12 serves as a core for a single winding 13. The top of the a referred to. A sound record support plate is carried on the hub 18 being fastened thereto by any suitable means such as screw 19, a dowel pin 20 being used to prevent the sound record support plate from slipping out of position while the record is being played. As shown in Figure 3, the armature bodies 7 and the pole pieces 6 extend toward each other to a point where a small air gap 21 is obtained. I preferably taper plate 23 may be adjusted on thebase 3 for e the purpose of shiftingthe position of the movable timer member 26 and the stationary adjustable contact 27. The movable member 26 carries a contact 28 that cooper-j ates with contact 27, the other end being turned over as at 29 which turned over portion is engaged by a cam 30 having the same number of indentations therein as there are armature bodies on the rotatable support 8'. The cam 30 is held on to an operating shaft in any suitable mannersuch as a screw 3L and dowel pin (not shown). The operating shaft, it will be understood is attached to the support 8 and passes through the hole 32 in the hub or core. 12 and through the base.3, a bushing 33 being preferably used at the timer end to guide the shaft in its operation.

Attached to the base 3 is a lug 34 carrying a pivotal bracket. 35 by means of a suitable pivot pin held in the lug 34 inany'suitable manner, such as a cotter pin 36. The

bracket.35 carries a sleeve 37 within which a shaft is journalled. One end of the shaft carries a friction wheel 38 that is adapted to run on the periphery of the support 8, being held in engagement therewith,'in any suitable manner, such as a spring 39 carried by the base 3. To the other end of theoperating shaft is fastened a member 40 which has fingers 41 bent over forming a slot within which the resilient member 42 is seated. On both ends of the member 42 are fastened weights 43 and it will be noted that there is a slight clearance 44 between the Weights and the fingers 41 so that the member 42 has a slight longitudinal motion. A contact 45 is carried by the spring member 42 and a cooperating contact 46 carried on an adjustable screw 47 which in turn is supported on an arm 48 that is fastened to the base 3, in any suitable manner, such as a bracket 43. The outer end of the arm 48 is attached to an adjusting screw 50 carried by the arm48. An adjusting thumb nut 51 is fastened to the outer end of the screw 50 and a spring 52 is adapted to hold the arm 48 in any position to which it is moved by the thumb nut 51 and screw 50. It is seen that the movement of the thumb nut 51 moves the arm 48 to alter the position of contact 46 with reference to the position of contact 45 and it will be further seen that- 55 in electrical contact with the terminal.

stud 56. The switch blades 53 and 55 are mounted in such a manner as to be connected together by a switch blade 57, which may be operated in any suitable manner to start and stop the motor, such as the automatic means described in my application previously referred to, of which this application is a division.

As to the operation of my device let it be assumed that the sound record disc has been placed on the rotatable support and that it [is desired to start the phonograph. The

switch lever 57 is operated as follows to close a circuit through the switch contacts 53 and 55 which allows current to flow from the battery B to binding post 58, thence through the electromagnetic winding 13 to the contacts 27-and 28 tothe frame. or groundG, thence through the contacts 45 and 46 of the governor to the binding post 59, through the switch blades 55, 57 and 53 back to the battery B or other source of current. After giving the rotating support a starting impulse inthe proper direction, the timer mechanism hereinbefore described, is brought into operation and opens and closes the circuit through the electromagnet 13 intermittently at, the proper intervals to send the magnetic flux through the armature bodies 7 andtpole ieces 6 in such a way that torque is pro need which rotates the support and the sound record body, the speedof which is controlled by the governor mechanism hereinbefore described and illustrated in Figures 3, 5 and 6. It Will be understood that a suitable dust proof cover is used in practice over the timer mechanism but for the sake of clearness it is not shown in the drawings.

In the wiring diagram, shown in Figure 2, it will be noted that the condenser 17 is connected across the timer points 27 and 28 and that a non-inductive resistance R is contion and the scope of the appende 50 said electromagnetic means.

nected across the governor points 45 and 46, both for the purposes well "understood in the art.

While I have shown and described cer- 5 tain details of one form of my invention, I

ord body, a plura ity of armature bodies carried by said support, a plurality of stationary pole pieces arranged to cooperate with said armature bodies, electromagnetic means centrally located with respect to the axis of said support for magnetically energizing all of said armature bodies andpole pieces simultaneously, and means for controlling the time of action of said electromagnetic means for the purpose described.

2. A phonograph comprisin in combina-- tion, a movab e support for the sound record body, a plurality of armature bodies carried by said support, a plurality of stationary pole pieces arranged to cooperate 36 with said armature bodies, and a single electromagnetic means centrally located with respect to the axis of said support for magnetically energizing all of said armature bodies and pole pieces simultaneously and means for controlling the time of action of said electromagnetic means for the purpose described.

3. A phonograph comprisin in combination, a movable support for the sound record body, a plurality of armature bodies carried by said support, a plurality of stationary pole pieces corresponding in number to said armature bodies and arranged to cooperate with said bodies and a single electromagnetic means centrally located with respect to the axis'of said support for magnetically energizing all of said armature bodies and pole pieces simultaneously and means for controlling the time of action of 4. A phonograph comprising in combination, a movable support for the sound record, body, a plurality of armature bodies carried by said support and-extending downward therefrom in spaced relation to each other, a plurality of stationary pole pieces similar in number and spaced relationship to the armature bodles arranged on a common base and extending upward to a cooperative position with said armature bodies and forming anenclosure, electromagnetic means centrally located with respect to the axis of said support and housed within said enclosure for energizing all of said armature bodies and pole pieces simultaneously and means for controlling the action of the electromagnetic means.

.5. A phonograph comprising in combination, a movable support for the sound record body, a plurality of armature bodies carried by said support and extending downward therefrom in spaced relation to each other, a plurality of stationary pole pieces similar in number and spaced relationship to the armature bodies arranged on a common base and extending upward to a cooperative position with said armature bodies, a single electromagnetic means centrally located between the movable support and the said base for simultaneously magnetically energizing all the said bodies and pole pieces and means for controlling the action of the electromagnetic means.

6. A phonograph comprising in combination, a movable support for the sound record body, a plurality of armature bodies carried by said support, a base carrying pole, pieces to cooperate with said bodies arranged around its periphery and also having a centrally arranged core projecting upward to-- ward the movable support, a winding disposed around said core for energizing the core and all of said bodies and pole. pieces simultaneously and means to control the action of said winding.

7 A phonograph comprising in combination, a movable support for the sound-record body, a plurality of armature bodies carried by said support, a base carrying pole pieces to cooperate with said bodies arranged around its periphery and also having a centrally arranged core projecting upward toward the movable support and carrying a bearing for said support, a winding. disposed around said core for energizing the core and all of said bodies and pole pieces simultaneouslyand means to control the action of said Winding.

8. A phonograph comprising in combination two annu ar discs of magnetic material each having the same number of pole pieces extending toward and in close proximity to each other, one disc serving as a base and the other as a rotatable support for a sound record body, an electromagnet disposed between the discs and having a core extending from one to the other, means for passing current intermittently through said electromagnet and means for controlling the speed of rotation of the rotatable disc.

9. A phonograph comprising in combination two annular discs of magnetic material each having the same number of pole pie'ces extending toward and in close proximity to each other, one disc serving as a base and the other as a rotatable support for a sound record body, an electromagnet disposed betweenthe discs and having a core extending from one to the other, and serving as a support for the upper disc and sound record body, means for passing cur-;

ergizing all of said armature bodies andpole pieces simultaneously, means for passing current through said electromagnetic means and means for controlling the current so that current impulses are sent through the electromagnetic means in such a manner that successive armature bodies are brought into cooperation with succe'ssiv stationary pole pieces as described.

11. A phonograph comprising in combination two annular discs of magnetic material each having the same number of pole pieces extending toward and in close proximity to each other, one disc serving as a base and the other as a rotatable support for a sound record body, electromagnetic means for magnetically exciting said discs and all of said pole pieces simultaneously and successively and means for controlling the speed of rotation of the rotatable member.

trical circuit through said electromagnetic means at intervals corresponding to the number of said armature bodies and further means for controlling the speed of r0- tation of the movable support.

13. A phonograph comprising in combination, a movable support for the sound record body, a plurality of armature bodies carried by said support, a plurality of stationary pole pieces corresponding in number to said armature bodies and arranged .to cooperate with said bodies andv a single electromagnetic means for magnetically energizing all of said armature bodies and pole pieces simultaneously, and an adjustable timer for closing an electrical circuit through said electromagnetic means at intervals corresponding to the number of said armature bodies, and further adjustable means for controlling the speed of rotation of the movable support.

14. A phonograph comprising in combination a movable support for the sound record body, a plurality of armature bodies carried by said support, a base carrying pole pieces arranged around its periphery to cooperate with said bodies and also having a centrally arranged hollow core projecting upward toward, and carrying a bearing on its upper end for the rotating support; a winding on said core, a shaft attached to the rotating support and passing through said hollow core and having a cam on the lower end, a timer member carried on an adjustable plate and operated by said cam for intermittently passing current through said winding and a governor operated by the rotating support for controlling the speed of its rotation.

In testimony whereof, I afiix my signature.

EDWARD J. TOMLINSON'.

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