US840685A

US840685A - Automatic engaging and disengaging device for dynamo and storage batteries.

Info

Publication number: US840685A
Application number: US33469406A
Authority: US
Inventors: Otto Boehm
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-09-14
Filing date: 1906-09-14
Publication date: 1907-01-08
Anticipated expiration: 1924-01-08

Description

PATENTEDJAN. 8, 1907 0. BOHM. I ENGAGING AND DISENGAGING DEVICE FOR DYNAMOS AUTOMATIC AND STORAGE BATTERIES. APPLIOATION FILED SEPT. 14,1906.

2 SHEETS-SHEET 1.

w/ TA/ESSES 624mm w No. 840,685. PATENTE'D JAN. 8, 1907. O. BOHM.

AUTOMATIC ENGAGING AND DISENGAGING DEVICE-FOR DYNAMOS AND STORAGE BATTERIES.

APPLICATION FILED SEPT.14',1906.

2 SHEETS-SHEET 2.

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r/wsssEs OTTO BOHM, (9F B PATENT UFFEQE.

ERLTN, GERMANY.

AUTOMATIC ENGAGING AND DISENGAGlNG DEVICE FOR DYNAMO AND STORAGE BATTERIES.

Specification of Letters Patent.

Patented Jan. 8, 1907.

Application filed September 14, 1906. Serial No. 334,694.

To all ZUI'LO'II'D it may concern:

Be it known that I, Or'ro Bonn, a citizen of the Empire of Germ any, residing at Berlin, in the Empire of Germany, have invented a new and useful Automatic Engaging and Disengaging Device for Dynamo and Storage Batteries, of which the following is a specification.

My invention relates to a device for automatically engaging and disengaging a friction-gear which controls a shaft for driving a dynamo that cooperates with a storage battery.

The urpose of my invention is to automatically stop the dynamo on the tension of the current exceeding a certain maximum and to automatically start the dynamo 'on the tension of the ciuent sinking below a certain minimum.

The new engagin and disengaging device is particularly suitable for vehicles or cars in which a dynamo to be driven from the wheels and a storage battery are disposed for furnishing the curent which is required for feeding various lamps in the vehicle or car.

I will now proceed to describe my invention with reference to the accompanying drawings, in which it is assumed that the dynamo is to be driven from the wheels of a vehicle or car for feeding, in conjunction with a storagebattery, the lamps of the vehicle or car.

Figure 1 is a vertical longitudinal section throu h a frame part of the vehicle or car provided with the automatic engaging and disengaging device on the broken line 1 1 in Fig. 2, the two friction-wheels and the dynamo being shown in elevation. Fig. 2 is a plan view of the same. Fig. 3 is a vertical cross-section through the broken line 3 3 in Fig. 2 and Fig. 4 is a diagram of the two driving friction wheels, the dynamo, the storage battery, the automatic engaging and disengaging device, and the circuit.

Similar letters of reference refer to similar parts throughout the several views.

(1 denotes a wheel-shaft of the vehicle or car, which is in any known or special manner mounted to turn in journals (not shown) disposed on the frame. Of this frame only parts of two. longitudinal beams g g and a cross-beam g, are shown. On the shaft care fastened the two wheels 0 0, running on the rails t; and also a driving friction-wheel d. The dynamo c of any known construction is suspended from the cross-beams g and g by means of suitable strips f f or the like. Oppbsite to the friction-wheel d an electromagnet h of the following construction is disposed on the cross-beam 9 It comprises a metallic cylindrical casing h, a movable iron core 72/ and a coil 72 The core 72,, is shown as made in one piece with a piston 71 which is mounted in the casing h, to reciprocate within the space not occupied by the coil 71 It will be seen that the piston /L4 and the casing h serve as an air-brake, which prevents the core b from moving too rapidly and suddenly. In line with the core'h and also with the dynamo 6 the second friction-wheel i, of any known construction, is disposed and arranged to move as follows: It is fastened on short shaft i,, the two ends of which are mounted to turn in suitable ball-bcarings al provided in the eyes of a yoke formed by two arms is, and A cross-rod m is shown as fastened with its one end on the longitudinal beam 9 (see Fig. 2) by means of a bolt or the like. It is bent and passes through a block which is secured on the longitudinal beam 9 by means of a doubled bolt m (See Fig. 1.) At the other end of the rod m a loose collar m is fastened by means of a pin m, or the like. Between this collar m and the said block the naves 7c, and 76 of the said two arms 761 and 7c, are mounted to rock on the rod m, while they are rigidly connected one with another by means of bolts Ic as is shown in Fig. 2. .The eyes of the two armslr and 7c, are provided with ears, between which a cross-head k is secured by means of two bolts la, and k The cross-head k is connected with the core 7L2 by means of a chain 7L5, while a helical spring h is inserted between the cross-head h and the casing h its two ends engaging in suitable annular recesses.

The short shaft i, of the friction-wheel i is in any known manner yieldingly connected with the armature-shaft c of the dynamo c, preferably by means of an intermediate shaft t and elastic couplings. The shaft 12. may be provided at its two ends with disks which. are coupled with corresponding disks of the two shafts i and c, by means of inserted leather disks it, and a, and pins alternately engaging from both sides in suitable holes, as is shown. The helical spring 71,, is given such :1 tension as to press the small friction-wheel i against the large friction-wheel d and To produce between them a friction sulli ient for driving the dynamo e. The coil a on the contrary, is so proportioned as to be able to attract the connected with the one a of the relay 1".

relay Q will remain inactive, although the curof the chain h ,w

core 7L3, and thereby to detach the driven friction-wheel i from the driving friction-wheel d, while overcoming the tension of the helical spring h the moment the tension of the our- 5 rept in the coil h g exceeds a certain maximum.

A storage battery 0 (see vFig. 4) of any known and approved construction is disposed on thevelncle or car and may, for example, serve for feeding a circuit 1), comprising a I 10 plurality of incandescent lamps. Moreover,

on the vehicle 07: car two relays g and 1* are disposed, thearmatures g and r, of which are normally pressed on rear contacts by means of spring; and 1;, respectively, as is '15 shown. The coil IQ, of the electromagnet h is connected, on 6160118 hand, direct with the one pole of the storage battery '0 and, on the otherhand, with the front contact g, of the relay g. The one pole of the dynamo e is pole of the storage battery '0 and also with the one end of the one I coil 7-, of the relay 7. The other pole of the dynamo e is connected with the other end of the coil 1, and "also with the front contact r The armature r of this relay is connected over the second coil 1", with the other pole of the storage battery 0. The coil of the relay 9 is shunted to the storage battery 0 in the manner shown.

IIf the vehicle or car stops, of'course the dynamo e willbe idle, so that the storage batthe tension of the current circulating'in thesaid circuit attaining acertain amount the relay 1" Wlll be so much energized as to attract its armature r wlnle overcoming-the tension 5 of the spring T The armature r will then come in-contact'with the front contact r so that the dynamo'e willnow be connected in multiple with the storage battery ofor supplying current to the circuit 1) or for charging the battery, as'the case may be. -The-other rent at the'same'time passes throughits-coil. If, however, the tension of the dynamo e,-and th'ereby,-also, the potential difference at both 5 5 poles of the storage battery 0, exceeds a-de-' terniined maximum, the relay q will be enabled toattract its-arm i'ture g while over coming the tension of the spring 9 so that the armature g, will comcin contact with-the 60 front contact g and will. close the circuit of the electromagnet 'h. The latter'will therefore be energized for attracting its core k and thus detaching the driven friction-wheel i from the drivinglfiiction-wheel dby means 'le overcoming the tension The plant described operates as follows:v

of the helical spring h Then the dynamo e will stop, and the storage battery 0 alone will continue supplying the current to the circuit p. Should the tension of the circulatingcurrent sink below a determined minimum, the spring g will overbalance the force of the coil of the relay g and will detach the armature from the front contact for opening the circuit of the electromagnet h. Then the helical spring h will press the driven frictionwheel i against the driving friction-wheel d, and the dynamo c will restart and work. Should the tension of the dynamo a sink below that of the storage battery 0, the relay 1* will release its armature r under the action of the spring T and thus disconnect the dynamo e from the storage battery 0. Thereby the storage battery 0 will be prevented from discharging over the dynamo e.

The automatic engaging and disengaging device described above may be varied in many respects without departing from the spirit of my invention. Where so preferred, the shaft of the driven friction-wheel i may be mounted to turn in slides moving in straight guides instead of in therocking yoke, as described above.

1. In an arrangement of the class described, the combination with a driving friction-wheel having its shaft mounted to turn in fixed journals,of a friction-wheel adaptiid to work with saiddriving friction wheel and having-its shaft mounted to turn in movable bearings, a dynamo, a yielding coupling between the shaft of said fi'iction-Wheel and that of said-dynamo, a spring adapted'to press said friction-wheel by means of its bearings against said driving'friction-Wheel,

and an electromagnetic deviceadapted todetach said friction-Wheel by means of its 'I'hovable bearings from saiddri'ving frictionwheel. q

2. In an arrangement of the class described, the combination with a drivingfrictio'n-wheel having its shaftmounted toturn in fixed journals, of a friction-wheeladapted to work with said driving friction wheel and having its-shaft mounted to'turnin movable bearings, a dynamo, a yielding-coupling between-the shaft of said friction-wheel and that of saiddynamo, a-spring' adapted to ress said friction-wheel by means of' -its hearings against said driving friction-wheel, an electromagnetic device adapted to de ach saidfrictiomwheel by means of its bearings from said driving friction-wheel, a storage battery, a working-circuit connected in multiple with said storage battery and saiddynamo, a shunt-circuitconnecting said electromagnetic' device withsaid-storage' battery,

rec

and 'a relay shunted to said stcrage 'battery I and adapted to close said "shunt-circuit on the tension of the current exceeding "a-de- .termined'maximum. r30

in arrangement of the class described, the combination with adri -Iing friction-Wheel having its shaft mounted to turn in fixed journals, of a frictiomwheel adapted to Work with said driving friction-Wheel and having its shaft mounted to turnin movable bearings, a dynamo, a yielding coupling between the shaft of said friction-wheel and that of said dynamo, a spring adapted to ress said hi tion-Wheel Icy means of its driving friction-Wheel,

.carings against electromagnetic device adapted to detach iction rheel by means of its bearings from said. ingfriction-Wheel, storage battery, r or ring circa. it connected in multiple with said storage and said dye mo, shunt-sir tut connecting said electromagnetic device storage battery, a relay shunted to said storage battery and adapted to. close said shunt-circuit on the tension of the current exceeding a deterrined maximum, and a second relay adapted to disconnect said dynamo ii? iii storage battery on tension of the current sinking below a de termined minimum.

L in an arrangement of the class described, the combination with a driving friction-wheel having its shaft, mounted to turn in fixed journals, of a shaft mounted in movable hearings to turn, a friction-whecl fastened on said shaft and adapted to Work with" said driving frictioncvheel, a dynamo With a rotor-shaft, an intermediate shaft, yielding couplings connecting said intermediate shaft with said shaft and the rotor-shaft of said dynamo, a spring adapted to press said friction-Wheel by means of said shaft and its bearings against said driving friction-Wheel, an electromagnetic device adapted to detach said friction-Wheel by means of said shaft and nee-rings -from said driving riction-Wheel, a storage battery, it working circuit connected in multiple with said storage battery and said. dynamo, a. shunt-circuitv connecting said electromagnetic device with said storage battery, a relay shunted to said storage batteryand adapted to close said shunt-circuit on the tension of the current exceeding a determined maximum, and a second relay adapted to disconnect said dynamo from said storage battery on the tension of the current sinking below a deter ned mirnmum.

in an arrangement of the class ecombination ith a driving fric-- t mounted to turn ing yoke, a friction-Wheel fastened on said shaft and adapted to Work with said driving friction-wheel, a dynamo With a rotor-shaft, an. intermediate shaft, yielding cou lings connecting said intermediate shaft with said shaft and the rotor-shaft of said dynamo, a spring adapted to press said friction-Wheel by means of said rocking yoke against said drivingfriction-Wheel, an electromagnetic device adapted to detach said friction-wheel by means of said rocking yoke from said driving friction-Wheel, a storage battery, a Working circuit connected in multiple With said storage battery and said dynamo, a shunt-circuit connecting said electromagnetic device with said storage battery, a relay shunted to said storage battery and adapted to close said shunt-circuit on the tension of the current exceeding a determined maximum, and a second re ay adapted to disconnect said dynamo from said storage battery on the tension of the current'sinking below a determined mimmum. r

6, in an arrangement of the class described, the combination with a driving friction-Wheel having itsshaft mounted to turn in fixed journals, of a rocking yoke, a shaft mounted to turn in the free end of said rocking yoke, a friction-Wheel fastened on said friction-Wheel, a dynamo with a' rotor-shaft, an intermediate shaft, yielding cou 8 connecting said intermediate shaft wit said shaft and the rotor-shaft ofsai dynamo, an electromagnetic device, a helical spring between said rocking yoke and said electromagnetic device and ada ted to press said friction-wheel against sai driving friction-Wheel, a chain connecting said yoke with said elec shaft and adapted to Work with said driving a tromagnetic device and adapted on the latter being energized to detach said friction-Wheel from said driving filOl'JiOI1Wl1(-36l,'& storage battery, a Working circuit connected in multiple with said storage battery and said dynamo, a shunt-circuit connecting said electromagnetic device with said storage battery, a relay shunted to said storage battery and adapted to close said shunt-circuit on the tension of the current exceeding a determined maximum, and'a second relay adapted to disconnect said dynamo from said storage battery on the tension of the current sinking below a determined-minimum. OTTO BOHM.

Witnesses 2 Eisner HAsPER, WoLnnMAs HAUrr.