US1494819A - Electrically-operated phonograph - Google Patents

Description

2 Sheets-Sheet 1 Filed June 25 1925 S D SHOBE ET AL ELECTRICALLY OPERATED PHONOGRAPH May 20 1 924.

/ INVNT0R- m By M m AITOR/VEVS May 20 1924.

S. D. SHOBE ET AL ELECTRICALLY OPERATED PHONOGRAPH Filed June 25. 1923 2 Sheets-Sheet 2 III/IIIIIIIIIIII/IIIIIII I l Ed! I vlllllll ATTORNEYS Patented May 20, 1%24 TNT] oFFlcE;

ELEGTRICALLZ-OIEERATED PHQNOGRAPH.

Application filed June 25, 1923. Serial No. 647,525.

To all whom it may concern:

Be it known that we, STEPHEN D. SI-IOBE and FLOYD L. KoHN, both citizens of the United States, and residents of Glenmore, in the county of Van Wert and State of Ohio,

have invented a new and useful Improvement in Electrically-Operated Phonographs, of which the following is a full, clear, and exact description. 7

Our invention relates to improvements in electrically operated phonographs, and. it

consists in the combinations, constructibns 7 plane of the shaft3, anda governor mechaand arrangements herein described and claimed.

An object of our invention is tofprovide an electrically operated phonograph of the character described in which an electric.

motor is employed for actuating thedevice and in which means'iis provided for automatically disconnecting the electric motor when the record has been completed.

A further object of our invention is to.

provide an electrically operated phonograph of the character described which employs a minimum amount of gears for transmitting power to the record plate of the electric motor and therefore greatly decreases the motor sounds which conflict with the tones and music reproduced from the'record.

A further object of our invention is to provide an electrically operated phonograph of the character described which may be operated from the ordinary electric lighting circuit.

A further object of our. invention is to provide an electrically operated phonograph of the character described which is simple in construction, durable, and thoroughly efficient for the purpose intended.

Other objects and advantages will appear 3 in the following specification, and the novel features of the invention will be particularly pointed outin the appended claims.

Our invention is illustrated in the accompanying drawings, forming part .of thisapplication, in which Figure 1 is a sectional view of an embodiment of our invention,

.Figure 2 .is an. enlarged view, partly in i 59 section, of the automatic switch, and

v F igure 3 is a sectional view along thev line 3 3 of Figure 1. V L

In: carryin out our invention, wemake use of the ordinary phonograph instrument 'ing.

having a horizontal board 1 beneath which the mechanism foractuating a record-plate 2 is placed. The record plate 2 is placed The shaft 3 is provided with a' worm wheel 4.. A" second shaft 5, having a worm gear6 at its outer end in mesh with the worm wheel 4, is disposed in a plane transverse to the nism 7 is carried by the shaft 5. The governor mechanism 7 is further providedwith aplate8. f

A feltshoe '9, carried at one end of a pivotally. mounted L-shaped lever '10, is arranged to normally engagewith the plate 8 so that movement of the lever 10 'on its pivotal support 11' may occasion the plate 8 to move longitudinally of the shaft 5 and thereby limit the expansion of the governor 6 and hencethe speed of the shaft '5. f A compression spring 12 serves to normally hold a lever 10 in the position shown in full lines in Figure 1. I I y i Means for moving the leverlO against the action of the compression spring 12 is provided in a threaded rod 13 projected through a threaded plate Mc'a'rried. by the panell. A k'nobf'15 is provided at the upper end of a screw. "13, by means of which the screw can b e turnedto cause the movement of the lever 10' on its pivotal support 11.

The shaft .5has a pulleyvvheel 16 mounted thereon and a belt 17 is employed to connect. the pulley: wheel 16 with the pulley wheel 18 '0f an .electricYmotor 19., This motor 19 is of a fractional horse power type and, ordinarily noiseless in operation.

.A transformer. 20 is mounted in the compartment adjacent the motor 19 and has its primary windings 21 arranged forconnection with the'house lighting. circuit or current source 22. This currentsource is preferably 110 volts and the currentis alternat- The secondary winding. 23 offthe 'transformer 'is of substantially volts and one terminal 24. thereof is connected directly ,with one*lead wire 25 of the motor 19 by means of 'a conductorl26. The terminal'24; is alsoconnectedby ineans" ofthe' conductor 26* to a stationary contact member 27 disposed adjacent the base 28 of the tone arm 29 of the phonograph (seevFigure 3).

An ordinary socket switch 30 of the push and pull type having a toggle operated switch, is mounted on the panel 1 so that the base 28 thereof projects above the panel and one terminal 32 of the switch is connected by means of a conductor 331:0 the opposite terminal 34 of the motor.19 This. switch 30 is provided with a vertically extending stem 35 by means of which the switch may be operated. In Figure 2 .we have shownthe switch in closed position so that current may flow through, the switch. magnet coil 36 of the, ordinary type, such as is employed in an enunciator, or}the like, is mounted adjacent the switchf30 and one terminal 37 ofthe coil is connected totheopposite terminal 38 of the switch 30. The opposite terminal 39 ofthemagnet coil 36 is connected by means of a conductorvj40 with an annular band 41 disposed, .concentrio the tone. arm 29, and securely. clamped thereto. The. band ,.41 is; further-,provided with anoutwardly extending Icontactlinember 42 electrically connected therewith which may contact; with .jthe..contact member 27 when the tone arm has been moved to the position shown in. dotted lines in Figure 3, as when the, needleof the reproducer has reached the end of the record.

A pivotally mounted lever .43-is supported adjacentthe magnet coil .36 and anparm .44 is carried by the lower endof the-lever 43 in registrationwith the core 45 of, the magnetcoil 36. The upper end, of the lever 43 has a bar 46 thereon. A switch operating-lever 47 is pivotally supported at .48so that one end,.49thereof may engage with the bar 46 of the lever .43 in such a. manner as to prevent a the movement in onedirection of the lever 47, while thelever 43 is in the position shown in Figure 2,,i. e., when the arm 44 is out of close engagement with the core 45 of,th e coil 46. The compression. spring :50 isv employed for normally holding the end 49 of the lever 47away from the panel 1. j v

- The opposite end 51 of the lever 47 is disposeddirectly above the head 52 of. the stem 35 ofthe switch 30.,

From the foregoing,. ,de scription ,of the various parts of the .d evice the operation thereof may be readily understood, In operating our improved electrically; actuatedphonograph, it is necessary-'firstto nianuallyt'move the switch, 35 the position shown in Figure 2. This will cause the lcircuit to close and 7 current willifiowwfrom: the

. w a I W n n anshee-.2 th u e ore h ugh h qedii e 8. t e i h ee ibade ywayo-e' --.e e nd n w e pposite tefirrizi l-i Tt qf he sec n ary- 1 i i ev 3- of" he t n former. This will cause the motor 19 to operate and to turn the shaft 5, which in turnwill actuate the shaft 3 and cause the record plate 2 to rotate, carrying the record therewith, and sound will be reproduced from the reproducer which is carried by the tone arm 29 in precisely the same manner as in the ordinary type of spring actuated phonograph. The governor 7 will function also. in precisely the same manner as the ordinary type of governor employed in the spring actuated phonograph. Variation in speed of the shaft 5 may be obtained by a rotation of the rod 13 which will-cause the shoe 90f the lever. 10 to move toward or away from the plate 9, depending upon the direction in which the rod .13 is rotated.

When the needle in the rep'roducer has reached the. inner end of the recording groove of the record, the tone arm 29 is moved upon itspivotal support (it is ofordinary construction to have the tone arm pivot upon its supportingbase 28) andas the tone arm 29 moves, the contact member 42 contacts with the contact member 27 at the moment the record has been completed. vThis will cause current to flow from the secondary Winding 23 of the transformer through the conductor 26, through the contact members 27-42, by way of the conductor 40 through the magnet coil 36, and back to the opposite terminal of the secondary winding 23 of the transformer by way of the conductor 53. Since the circuit in which the magnet coil36 is employed is now complete, the magnet coil will become energized and cause the lever 46 to move out of engagement with the lever 47. The spring v50 will therefore cause the lever 47 to be forcefully projected in an upward direction, As a consequence, the opposite end 51 of the lever 47 will be forcefully projected in a downward direction and will cause the stem 45 of the switch 30 to .be pushed inwardly and therefore actuate the toggles'witch 41 to break the connection between the terminals 32 and 38 of the switch. Thiswill cause the motor 19 to be disconnected from the secondary winding of the transformer and rotation of the plate 2 will cease. v v I It will be noted that one of the important advantages of our electricallyv actuated phonograph is that there are no mechanical springs and also no heavy springs to wind after each record has been played.-

We claim:

1. Ina device of the character described, a manually operated switch, a pivotally mounted lever, one "end, arranged to voverlie the handle portion of said. switch, amspring disposed at the opposite end of said lever and arranged to cause said lever toloear against said switch handle, a trigger for holding said lever out of engagement with said switch handle against the action of said spring, and electrically operated means for releasing said trigger, whereby said lever may engage with said switch handle and manipulate said switch.

2. The combination with a rotatably mounted record supporting plate, a pivotally mounted tone arm adjacent to said plate, of an electric motor arranged to rotate said plate, an electric circuit for operating said motor, a switch disposed in said circuit and capable of manual manipulation, a pivotally mounted lever, one end ar ranged to overlie the handle portion of said switch, a s ring disposed .at the opposite end of sai lever and arranged to cause said lever to bear against said switch handle, a trigger for holding said lever out of engagement with said switch handle against the action of said spring, and electrically operated means associated With said tone arm for releasing said trigger when said tone arm is in a predetermined position, whereby said lever may engage with said switch handle and manipulate said switch.

STEPHEN n. SHOBE. FLOYD L. KOHN.

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