US1284219A - Starting device for la cour motors. - Google Patents

Description

mann stradine rerum carton.

j EORGE R. BENJAMIN, OF JERSEY CTY, NEVI JERSEY, ASSIGNOR T0 THE WESTERN UNON TELEGRAPH OOMEANY, OF NEW YORK, N. Y., A CORPORATION' 0F NEW YORK.

STARTING- DEVICE FOR LA. COUR MOTORS.

1,284,2119. Specification of Letters Patent.

Patented Nov. 12, i918..

Application filed July 3, 1915. Serial No. 37,825.

To all whom it may concern: 7 and' 8, one of which screws is connected, as Be it known that I, GEORGE R. BENJAMIN, hereinafter shown, to one set of magnets a citizen of the United States of America, 33, the other screw being connected to the and a resident of Jersey City, county of other set of magnets t-d. 9 designates a 5 Hudson, and State of New Jersey, have incam wheel mounted upon the shaft 10 of the 60 Vented certain new anduseful Starting Defly wheel 1 and armature wheel 2, the teeth vices for La Cour Motors, of which the tolof this cam wheel corresponding generally lowing is a specification. to the teeth ot the armature wheel :2. 11 My invent-ion relates to starting devices designates a spring-pressed hand lever piv- 1@ for Lar Cour motors, sometimes termed oted at 1:2 to a. stationary member ot' the 65 phonic wheel motors. As is well known, trame ot the machine; and 13 and 14 desigsuch motors comprise a toothed wheel, tormnate bell crank contact levers, pivoted to ing an armature, and two or more magnets this lever 11, one end of each of the bell arranged to act upon such armature and crank levers 13 and 14e carrying an anti- 125 which are also arranged to be energized and friction roller 15 adapted for coaction with 5i@ denergized in alternation. Such energizathe cam wheel 9, the other arms of said tion and denergization ot vmagnets is usubell crank levers being connected by a Spring a'lly effected by contact means operated by a 16 tending to hold them against tho cam tuning fork, vibrating reed, or other memwheel. Suitable contact stops 17 and 18 are 2@ ber which will operate at a ve 1y uniform provided for levers 13 and 14; respectively. if@ speed. 'lhese Cour motors are not selt- 19 designates a case fixed to a suitable start-ing, but require to be spun up to a roportion or the Ytrame of the machine and tative speed, approximately corresponding1 having within it a plurality of contact to the speed ot vibration ot the controlling springs, as shown particularly in the lower 2o forli or vibratingl reed, by hand or by other portion of 1, wherein this chamber 19 means. it is frequently inconvenient to do is shown in connection with the circuits this. My invention comprises means wherewhich its contact springs serve. These conby once the wheel ot the motor be given n tact springs comprise two main springs 2O slight rotative 4motion7 that rotation will and Z1 which have a tendency to make conit@ be continued with progressively increasing tact with other springs QQand S23, respec- @tl sp Jed, until the wheel reaches a speed cortively, but in the lower portion ot Fig. 1 responding to that ot the tuning fork or are shown as separated by means of a wedge vibrating reed which is to control piece 24, carried by and operated by the The object of my invention is to facili* handle 11; and these springs 20 and 21, when @o tate the starting of La Cour motors. and to so separated, are in contact respectively with do this by simple means. Contact pieces 25 and 26.

1 will now proceed to describe my invenrll`he circuits are as follows: tion with reference to the accompanying Starting from the battery B a |conductor drawings, and will then point out the novel 27 leads to hand lever 11 and thence to bell e@ features in claims. lin said drawings: crank contact levers 13 and 14. The contact Figure 1 shows, more or less dia grammatistop 17 ot one of these levers, 13, is connectcally, a La Cour motor having my improved ed by a conductor Q8 to contact member 25. starting device applied thereto. The contact stop 18 of the other bell crank Fig. 2 shows a top view of the starting contact lever, 14, is connected by conductor e5 device. 29 to contact piece Q6. Contact spring 2C* is too 1n the drawings 1 designates the usual tly connected by conductor 30 to the two magwheel of a La Cour motor, behind which 1 nets t and thence through one side of a curha-ve shown, in Fig. 1, and in dotted lines, rent meter 31 and regulating rheostat 32, to the usual toothed armature wheel and the the other pole ot' battery B. Contact spring ao usual magnets 3-3 and 'st-4f, connected in 21 is connected by conductor 33 to magnets 3 multiple groups of two each. 5 designates and thence through the other side of cura controlling device consisting in this inrent meter 31 and rheostat 32, to battery B, stance of an electrically driven tuning fork, rThe plus pole of battery B is also connected one tine of which carries a contact spring ti to the base of the ork 5, and thence through to playing between adjustable contact screws the contact spring t3 on one tine of that tito to contact screws 7 and 8 in alternation. Contact screw 7 is connected by a conductor 34 to contact spring 23; and contactv screw 8 is connected by conductor 35 to contact spring 22.

Assuming that the tines of the fork 5 are in vibration, maintained, as is customary, by the usual driving magnet 36 and contact device 37-38: If now, the outer or right hand end of lever 11 be depressed slightly, and the fly wheel'l be given a slight start in the proper direction of rotation, bell crank contact levers 13 and 14 will be operated by the cam wheel 9, and thereby magnets 3-3 and 4 4 will be energized alternately as follows: from positive poleof battery B through conductor 27 to hand lever 11 and thence through bell crank 13 and its stop 17 to contact piece 2,5, contact spring 20 then in contact therewith, conductor 30, and magnets 4, back to battery; or, in alternation, from lever 11, through bell crank 14, lits contact stop 18, conductor 29, contact piece 26, contact spring 2l, and magnets 3, back to battery. It will be seen that only a very slight push need be given to fly wheel 1 in order to start the cam 9 and cause that cam to operate the bell crank contact levers 13 and 14 two or three times; `and with even one energization of magnets 3 followed by energization of magnets 4, and so on, or vice versa, the La Cour motor will pick up; rotation of its4 armature and fly wheel, and of the cam 9, then continuin because of the alternate energization and energization of magnets 3 and 4. Under such conditions, the La Cour motor tends to increase in speed quite rapidly, and when its speed is judged to be suffciently high the lever 11 is released, and then rises sufficiently to move the bell crank contact levers 13 and 14 out of the path of the cam Wheel 9; the wedge 24 of the spring contact mechanism being thereby lifted, so as to permit contact springs 20 and 21 to break contact with contact pieces 25 and 26, and to make contact with contact springs 22 and 23 respectively. The circuits are then the' 'normal circuits of a La Cour motor, the current from the positive poleI of battery B passing through one tine of the fork 5 to spring 6 and thence through contact screws 7 and 8, and their circuit conductors 34 and 35, in alternation; the circuit of conductor 34 passing through contact springs 23 and 21 to conductor 33 and magnets 3, and so back to battery; the circuit of conductor 35 passing through contact springs 22 and 20 and through conductor 30 to magnets V4 and so back to battery.

What I claim is 1., The combination with the magnets and armature wheel of a La Cour motor, and normal operating contact means for energizing and denergizing such magnets in alternation at`-a substantially uniform rate, of

starting means for such motor comprisin auxiliary contact means operated by sai armature wheel in its rotation, and arranged when sov operated to energize the magnets of said motor in alternation, and switching means arranged at will to connect the normal operating contact means or said auxiliary contact means, alternatively, to the said magnets of the motor, said auxiliary contact means comprising means for throwing such auxiliary contact means out of mechanical operation when the switching means disconnects such auxiliary Contact mechanism from the motor magnets, and a single operating device for said starting means and switching means.

2. The combination with the magnets and armature Wheel of a La Cour motor, and normal operating contact means for energizing and denergizin such magnets in alternation at a substantially uniform rate, of starting means for such motor comprising auxiliary contact means operated by said armature wheel in its rotation, and

comprising a rotary member arranged to be.

rotated by the motor wheel, and means operated by said rotary member for energizin the magnets of the motor in alternation; and switching means arranged at will to connect the normal operating contact means or said auxiliary contact means, alternatively, to the said magnets of the motor, said auxiliary contact means comprising means for throwing such auxiliary contact means out of mechanical operation when the switching means disconnects such auxiliary contact mechanism from the motor magnets, and a single. operating device for said starting means and switching means.

3. The combination with the magnets and toothed armature wheel of a La @our motor, and normal operating contact means for energizing and denergizing such magnets in alternation at a substantially uniform rate, of starting means for such motor comprisin auxiliary contact means operated by sai armature wheel in its rotation, and com rising a cam wheel arranged to be rotate b the motor wheel, and toothed in correspon ence with said motor wheel, two contact mechanisms mechanically operated by said cam wheel, and circuits from said 4contact mechanisms to the motor magnets, all arranged to cause the energization of said motor magnets in alternation as the cam wheel rotates; and switching means arranged at will to connect the normal operating contact means or said auxiliary contact means, alternatively, to the said magnets of the motor. l

4. The combination with the magnets and toothed armaturewheel of a La Cour motor, and normal operating contact means for energizing and denergizing such magnets in alternation at a substantially uniform ratez of starting means for such motor comprising auxlliary contact means operated by sald armature wheel in its rotation, and

comprising a cam wheel arranged to be ro' tated by the motor wheel, and toothed in correspondence with said motor wheel, a pivoted lever, twocontact mechanisms each having a movable member carried by said lever and arranged to be brought into operative coaction with'said cam wheel by motion of said lever in one direction, said lever provided with means tending to hold it in such position that the said movable members of said contact mechanisms are out of coaction with said cam wheel, and switching means arranged at will to connect the normal operating contact means or said auxiliary contact means, alternatively, to the said magnets of the motor.

5. The combination with the magnets and toothed armature wheel of aLa Cour motor, and normal operating contact means for energizingl and denergizing such magnets in alternation at a substantially uniform rate, of starting means for such motor comprising auxiliary contact means operated by said armature wheel in its rotation, and comprising a cam wheel arranged to be rotated by the motor wheel, and toothed "in correspondence with said motor wheel, a pivoted lever, two contact mechanisms each comprising a spring actuated bell crank contact member carried by said lever and a contact stop, said lever arrangedto be moved to bring such bell crank contact members into positionto be operated b said cam wheel, but normally holding sai bell crank contact member out of coaction with said cam wheel, vand switching means arranged at will to connect the normal operating contact means or said auxiliary contact means, alternatively, to the said magnets of the motor.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.v

' y GEORGE R. BENJAMIN.

Witnesses:

- i W. H. McELRor,

PAUL H. Fiamma

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