US1842980A - Recording means for electromotors - Google Patents

Description

' Jan. 26, 1932.

J. FIDDES RECORDING MEANS FOR ELECTROMOTORS Filed Oct. 28. 1927 3 Sheets-Sheet 1 (Pa .Ww' WM Jan. 26, 1932. J. FIDDES 1,842,980

RECORDING MEANS FOR ELECTROMOTORS Filed 001;. 28, 1927 v 5 Sheets-Sheet 2 Jan. 26, 193-2, J D s 1,842,980

' RECORDING MEANS FOR ELEG'IROMO'IORS Filed Oct. 28, 1927 3 Sheets-Sheet 3 machine with which Patented Jan. 26, 1932 PATENT OFFICE JAMES FIDDES, 0F ABERDEEN, SCOTLAND RECORDING MEANS FOR ELECTROMOTORS 7 Application filed October 28, 1927, Serial No. 229,329, and in Great Britain November 5, 1926.

This invention relates particularly to electric motors which are connected to and driving machines, and has for its object the provision of means for registering the work done by amachine or machines driven by an electric driving motor and for registering at the motorfthe machines, or elsewhere either or all of the following A. Thetime during which the motor has been running Without load.

B; The time during which the motor has been running'with load. I

C, The time during which the motor has been running overloaded.

Suchregistering means may also register the number of times the motor has been on andoff or has been overloaded during any particular p eriod of time.

The present invention provides an arrangement in which the flow of current through the electric motor driving the machine is utilized to secure a correct register of the time during which either the motor or the it is associated or both havebe'en standing idle, running idle, doing p -roductive work, or, if desired, of the numberiof times'the motor has been on and off, on and ed load, or overloaded.

In accordance with the invention there is provided in association with the motor or motors an electro-magnet orelectro-magnets or solenoid orsolenoids or the like controlled by the" strength of the 5 current flowing .throughthe driving motor or motors, and in turn controllingone or more registering devices. l 1 v The invention is illustrated in the accompanying drawings in which Fig. 1 is a perspective view of an electro-m'agnetically controlled instrument connected to a single recording instrument. 2 shows diagrammatically an assembly of the registering means, starter, electric motor and the machine the record of which is sought, employing two registering instruments. Fig. 3 shows an instrument including a solenoid controlling two registering instruments.

Fig. 4 shows an electro-magnetically con trolled instrument similar to that shown in Figs;;1 and 2 used in conjunction with and to control through solenoids two or more registering instruments. Figs. 5 and 56; show diagrammatically an arrangement by which a number of difierent records can be obtained from a single registering instrument.

The instrument shown in Fi s. 1 and 2 comprises an electro-magnet inc uding pole shoes 1, 1a a winding 2 and an armature 3 carried by a bell-crank lever 4, fulcrumed at 5 on the pole shoe 1, the armature 3 being balanced by a balance weight 6 adjustably mounted on the bell-crank lever and the position of the armature with reference to the pole shoes being adjustable by means of an adjusting screw 7 in screw-threaded engagement with the bell-crank lever 4 and abutting against the pole shoe 1.

Conncc ed with the armature 3 by means of a rod 8 is a registering instrument including a clock generally indicated at 9. The balance or other wheel or main-spring of the clock is titted with a suitable brake which normally prevents operation of the clock. The brake-operating mechanism is so connected to the rod 8, that, when the armature is attracted towards the pole shoes, the brake is released and. operation of the clockand associated registering mechanism is permitted. The coil of the electro-magnet is wound with a gauge of wire capable of carrying the full ampere current flowing through a motor with which it is associated when the latter is on full load or overloaded, the number of am pore turns being arranged so that the pole shoes of the magnet attract the balanced arm over a small gap when the minimum ampere current required to run the said motor on no load is flowing; or the magnet may be arranged so that it will not operate until the minimum ampere current required by the motor when loaded is flowing, or only when the ampere current required by the motor when overloaded is flowing. Alternatively, the magnet may be arranged in a shunt circuit and the coil in such case will be wound with a gauge wire capable of carrying the shunted proportion of the maximum current flowing through the motor. It will be seen that, when the instrument is suitably adjusted and the flow 0t ampere current reaches the minielectromagnetic devices required with this arrangement depends on the number of different registers required, one electro-magnet' being required for each register. Thus in the arrangement shoavn 'in Fig.2 two electro magnetic devicesare provided, one permittinggof -a register ofthe totaltime the motor gut 1s running without 1021a,. and the other per-' mitting 'of a registe'i' of" the time 1t 1s running on load, the latter device being arranged tooperate only. when a load is on the motor..-

It will be obvious that theelectro-magneticdevices may;be-farrange d. so that one only registers when a. load. 1s on the motor and one when the: latter: is overloaded and that.

an electromagnetic device additional to the Sir-others maxybe addedfor-the purposeof reg isteri ngthe number of. contactsmade.

Fig. 3 shows a single electro-magnet: or.

solenoid controlling, two or more registering instruments... v t 33; In the" instrument shown in that figure theimovingsarmatureor core lOis balanced by means of a balance "wcightll carried by a lever pivoted at 12. The core is providedat. its lower end with an attachment consisting; of spaced arms: 13,. 13' and. 14; which on movement of the armature or core 10 to different. extents dependent on the cur-- rent passing ,throug'l1. tl1'e eleetro-magnet or solenoid release the. brakmg. mechanism of 510110. registeringinstrumcnt or clock 9 and on.

fiirther movement release the-braking mechanism of the second registering. instrument or clock,..at the same time. braking the first mentioned registering instrument.

The arm l lsco operates with pivoted braking meansindicated at. 15 for the second clock 9a such pivotedbraking..means being.

counterbalanced by a weight or spring. 16 which is. movable by. the arm. 14. This arrangement operates as follows :The armatime or core 10 in rising first releases the brake attached to arm 13 from-the flywheel arbor or spring of. one registering instru ment or clock 9,.and on. further movement causes arm. 14 to =raise the pivoted braking means '15-so-as to-releasei the second registering instrument. or clock 9a.. At the same time'the arm13 moves intoposition to brake tliefirshmentioriedregistering instrument or The distance between arm 14 and the pivoted braking means 15 is less than that between arm 13 and the flywheel arbor or spring of the first registering instrument 9, so that the first upward movement of core 10 only raises the arm 13 clear of the flywheel arbor or spring of the first registering. instrument, andbrings arm: 14 close to thebraking means 15 without operating it and also brings arm 13 nearer to the flywheel arbor or spring of the first registering. instrument. Further movement upwards of the armature or core 10 causes REIT-1410 release the second registering instrument 9a. and brings 13 in contact" with the flywheel arbor'or'springof the first. registering.instrument 9.. .lnthisrway the first. registering. instrument 9.. willf only: record the actualQtimc'th e motor and machiiie: to which it. is connected. has beenrunning. without load, and the second .registering. in.--

strument willfonly record.theactual'time the.

motor and machine have been runningwith. load. The arms 13, 13, l t may-be rigid or may be. scmi-flexible. Tliearmaturemr the attachment may have an additional'arm or arms for the purpose ofloperating a-countments.

core 10.

The moving. armature may consistof two arms connected together and. operated by a. pair of associated coils.

It willbe obvious, also, thatthe electromagnets or solenoids may be incorporated with the. clockwork mechanismiofltheregis tering instrument, instead of controlling it. from the outside ofthe casing containing the said clockwork mechanism..

In the embodimentshown in Fig. 4th ere is provided a single electro-mag-net' 17 "anda'solenoids 18,19'f0r controlling each clock or' the like. The electro-magnet 17 is in series with the motor circuit and unless shunted is wound to carry the full-l ampere current of the motor. The moving armatureQOOf this electro-magnet 17'is provided' witli'a contact arm 21 extending between contacts 22, 23! one of which is connected with the solenoidof the clock 9 or the like for registering tlie'time the motor is running without load 'and" the other "ofwhich is connectedwitli thesolenoid of the clock 9w or thelike registerin the time the motor isrunn'ing onloajd. ese contacts provide for completion oftlie cir= cuits through the respective coils; i

24 denotes the motor and" starter, 25"the electric mains. q

The position of the contacts 22 23 is such that when the motor" is started the contact arm 21 of the. controlling electro-magnet is in contact with the contact 2 2'and the circuit through the solenoid. 18L controlling. the. clock. 9 registeringthe time the. motor is .running. without loadz is closed andthe. bralierof. this clockreleased. When: the. armature-.26:

16 denotes stops fittedto the moving of the controlling electro-magnet 17 is attracted on current of a predetermined amperage passing through this electro-magnet, corresponding to a load on the motor the contact 21 is brought into contact with the second contact 23 and the circuit of the sec- 0nd solenoid 19 is closed and the clock 9a registering the time the motor is running on load is started. 7

Simultaneously with the closing of the latter circuit the first circuit is broken.

An arm (not shown) on the solenoid for the second clock 9a may be used to release a third clock or a counting or other registering instrument.

The solenoid shown in Fig. 3 and the electromagnet shown in Fig. 4 may be wired with the full gauge of wire capable of carrying the full ampere current flowing through the motor, or if shunted, the full shunted proportion.

The electromagnet 17 shown in Fig. i may be dispensed with if or when desired by arranging that the contacts 21 are connected directly to the moving arm of an ammeter or to an additional arm fitted to the latter.

Where it is preferred that the whole of the registering parts of the instruments for a large number of motors shall be placed together in a compact and convenient form at some distant point one or more continuously moving cylinders operated by clockwork mechanism may be used to operate a series of spools providing registers for all the motors. When this method is adopted the magnets already referred to when operated at the pro-arranged minimum strength required to attract their respective armatures, bring their respective spools carrying registering strips or paper into contact with one of these continuously moving cylinders, each spool, of course, only remaining in contact with a cylinder when current is flowing through the motor to which it is connected equal to the predetermined strength required to attract the armature of its controlling magnet.

Such an arrangement is shown in Figs. 5 and in which 27 indicates one of a series of electro-magnet disposed suitably side by side each controlling an armature 28 mounted on a pivoted lever 29 counter-balanced by a weight 30 and carrying at one end a drum 31 wound with a strip of paper and movable into engagement with. the periphery of a continuously rotating drum or clock 32 when the respective armature 28 is attracted to its electro-magnet 27 by current passing through the motor to which it is connected. When the drum 31 comes into contact with the continuously revolving drum 32 it is caused to rotate and the paper strip carried thereby is unwound, the length of strip unwound giving a register of the time the armature is attracted. The drums 31 may be merely clock dials which turn when in contact with the drum 32 and by their position provide a register of the time during which the particular armature associated with that clock dial has been attracted.

Two or more electro-magnets may be associated with each motor one such electromagnet being set for instance to ensure engagement of its drum 31 with the drum 32 when the motor is running without load and one-to-operate when the motor is on load or is overloaded.

I claim:

1.. Apparatus for registering the working time of machinery driven by an electric motor, comprising an electromagnet in series with the motor circuit and energized by the energization'ol the motor, a paramagnetic member therefor, settable to be attracted at different loads on the machinery, a register ing device, mechanical connection-means between said paramagnetic member and the balance-wheel of the registering device, and balancing means on the paramagnetic member whereby when the current pulled through the electromagnet by the driving motor attains a predetermined value, set up by the gap between the paramagnetic member and the electromagnet, the paramagnetic member is attracted to cause the registering device to indicate the time during which current greater than a predetermined minimum is pulled through the electromagnet by the motor. 7

2. Apparatus for registering the workingtime of machinery driven by an electric motor, comprising an electromagnet in series with the motor circuit and having pole shoes, a bell crank lever fulcrumed to one shoe, an armature carried thereby, said armature being balanced by a weight adj ustably mounted on one end of the bell crank lever, the downward position of the armature being limited by an adjustable set screw at one end of the lever, a rod projecting from the other end of the lever, said rod having its lower end connected to a brake shoe, said brake shoe bearing against the balance wheel of a registering clock, whereby when the current greater than a predetermined minimum is pulled through said electromagnet by said motor, the brake is released and the clock registers the time the motor is running on no load, load, or overload, respectively, according to the predetermined gap between the armature and the pole shoes.

3. Apparatus for registering the workingtime of machinery driven by an electric motor, comprising a solenoid having a winding in series with the motor circuit and a movable pole, said winding having a lever pivoted at one end thereof, one end of said lever being attached to said core and the other end having a counter-weight thereon, the lower end of said movable core having two 4" mam-pea arms onwone side,.said arms being curved-towards eacln other" and the upper. arm nor;- mally braking; the main spring of a" registering clock,.the other side of said core having another arm thereon a'. registeraclock. associated-v tl1orew-ith-,.a device =fornormal1y holding the balance wheel of: said registering: de vice stationary,1the gapibetweensaid second; arnr and;the second balance wheel being less 10 than that between the: first armand-the first balance wheel; whereby on movement of? said core to different extents by the different strengths of current, the first ofsaid arms releasesthe mainispring of the first clock and f further movement of said core causes the arm. 011 the second side to release the brakingmechanisnrof the second clock, braking. of' the first clock: by the second: armiot the-first: side, occurring.simultaneously.-

Z0 4. Apparatus for registeringthe Working,- time of machinery driven byan. electric motor, comprising anelectromagnet' in series with the motor circuit, a' movable armature therefor; a: contact arm extending between 25 twocontacts, two solenoids, oneoffsaid contacts being connected with one solenoid, the core of said solenoid-being connected With a clock for: registering: the time the motor runs without load, the other 015 said contacts being connected with the-other solenoid, the core of said'second'solenoid being connected with a= clock for registeringthe time the motor is running on load.

In testimony whereof I have signed my name to this specification.

J AM-ES I FIDDES

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