US1830762A - Secondary clock - Google Patents

Description

Nov.'1U, 1931. c. E. LARRABEE 1,830,762

SECONDARY CLOCK Filed Oct. 20. 1928 2 s eets-sheet -1 llulilc F IG .s

mawtoz ll lllalllL 1 III Nov. 10, 1931. c. E; LARRA'BEE 1,830,762

- "sEcoNDARY CLGCK I v Filed Oct. 20. 1922' I 2 Sheets-Sheet 2 Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE? CLINTON E. LABRAIBEE, OF IBIN'GHAMTON', NEW YORK, ASSIGN'OR TO INTERNATIONAL TIME RECORDING COMPANY OF NEW YORK, 01 ENDICOTT, NEW YORK, A UORPORA-.

TION OF NEW YORK snconnsny cnocn Application filed Uetober 20, 1928.

The present invention relates to an electrically operated clock and more particularly to a magnetically actuated secondary clock such as are used in electric clock systems in which the secondary clocks are controlled by current impulses controlled by a master clock.

The main object of the present invention is to provide an electrically actuated clock of very quiet operation.

Another object of the invention is to provide a magnetically actuated clock mechanism controlled by an armature moving in trans verse direction to the magnet field.

A further object of the invention is to provide a rolling armature for a magnet for controlling a clock mechanism.

Other objects and advantages will be hereinafter set forth in the accompanying specification and claims and shown in the drawings '29 which show by way of illustration what is now considered to be a preferred embodiment of the invention.

In the drawings: v

Fig. 1 is a rear view of the secondary clock;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1; i

Fig. 3 is a side view of the controlling de= vice for the clock mechanism;

Fig. 1 is a sectional view on line 4-4- of Fig. 1;

Fig. 5 is a side view of the controlling device in another controlling position.

Fig. 6 is an enlarged detailed view of part of the mechanism shown in Fig. 5.

In Fig. 1 is illustrated the clock mechanism. It is mounted upon a front plate 2 and a rear plate 3 connected with each other by cross rods 4. Upon the plate 1 are mounted two magnet cores 5 and their associated magnet coils 6. The hands of the clock are driven by the usual gearing from the ratchet wheel .7 which is actuated by magnets 6 as will beexplained.

The ratchet wheel 7 is-actuated every minute and is fixed to a shaft 9 journalled in the plates 2 and 3. At the opposite end of said shaft is fixed the minute hand 8. The usual well known gear train reduction is provided between the minute hand 8 and the hour hand l tconsistin'gof the gear 10 fixed to the shaft Serial No. 313,662.

9 meshing with the gear 11 fixed to a common shaft with gear 12 and journalled in the front plate, the gear 12 meshing with gear 13 to which the hour hand bushing is attached. The gear ratio described is such that one complete revolution of the minute hand will move the hour hand a suificient space to indicate one hour lapse. The actuation of the ratchet wheel 7 may best be understood from Figs. 3 to 5. Upon both sides of the magnet coils and pivoted to the frame 1 by studs 15 and 16 (Fig. 1) are levers 17 and 18. Said leversare provided with enlarged holes 15 cooperating with the pivot studs so as to permit lateral as well as arcuate movement of said levers. The play permitted in the movement of these levers is resiliently resisted by means of springs 19 which are fixed to the levers at one end and at the other endto a clip held by the pivot I by a rotatable shaft 22 on which is lined an armature 23, said shafthaving fi'xed at each end thereof circular disks 23 which rest on and are supported by plate 28, thus permitting a rolling action when the :race of the ar mature carrying curved pin 27 is drawn toward the flux field of the magnet. The action of the springs 19 previously mentioned also serve to hold these disks 23 firmly against the plate 28. Thearmature and the upper end of the levers 17 and 18 are normally held in the position shown in Fig. 3 by means of the spring 2 1 fastened to bracket 25 and to the upperpart oflever 17 by means of pin 26. In the middle of the armature 23 is fixed a curved pin 27 projecting through a hole in plate 28. This curved pin prevents the armature from being revolved on its shaft except at such time as when itmay be rolled to the left as shown in Fig' 3 on the plate 28.

' Uponthe shaft 29 is pivoted member 30 I v member 31 to be lowered and advancing pawl member and fast to said plate. A coil spring 35 held in a compressed cond1t1on between the head of the'stud 32 and the pawl member 31 causes said pawl member to resiliently engage the teeth of the ratchet wheel 7 in order that said pawl will ratchet over the teeth when moved upwardly and engage said teeth to move the ratchet wheel 7 when restored downwardly. As may be seen from Fig. 5 the member is provided with an irregular shaped slot 33 cooperating with a pin 34: which is fixed to the lever 17. The arcuate motion of the lever 17 therefore causes the plate 30 and therefore the pawl 31 to move upward and downward due to the cooperation 0 said pin and slot. It may be seen that member 30 therefore holds pawl member 31 in raised position as shown in Fig. 5 when the lever 17 is moved in counterclockwise direction andupon the restoring movement when said lever is moved in clockwise direction the 'pawl member 31 will move downwardly engaging the ratchet wheel 7 and shifting said ratchet a distance equivalent to the space of one tooth. To retain the ratchet wheel '7 in osition against the upward ratchet action of the pawl member 31 there is provided an impositive sto device consisting of a spring-pressed ball 4 held in a cylindrical casing 41 fixed to the front plate of the machine and held in coo eration with the ratchet wheel 7 by means 0 a spring 42.

When a current impulse is initiated by the master clock the magnet coil 6 will be energized and armature 23 which is normally located to one side of the center of the ma etic field will be drawn into this field and t e attraction being downward and toward the center of the magnet will tend to pull the pin 27 downward together with the lower side of the armature. The result is both a force to displace the armature to the left and to rotate said armature about its axis which finally is revolved into a rolling motion which is facilitated by the'circular disk 23 bearing on the flat plate 28. This result of motion displaces the lever 17 to the left raising the pawl member 31 by the slot and pin connection causing said pawl to ratchet over one tooth. When the current impulse is interrupted and the magnets deenergized the arm is restored to the right by spring 24 thus causing the paylvl t e ratchet wheel 7 as previously explained.

Thus with the impulses sent once every minute it will be seen that the secondary movement will adyance the hands of the clock the equivalent of one minute for each im ulse.

While there has been shown and escribed and pointed out the fundamental novel features of the invention as applied. to a single "modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those scope of the following claims.

1. In a magnetically operated mechanism, a magnet, an armature therefore, a rotatable axis for supporting said armature, and means for supporting said axis for both rotary and transverse motion of said armature.

2. In a magnetically operated mechanism, a ma net, an armature therefor, a rotatable axis or supporting said armature, rollable means for supporting said axis and fixed means for supporting said movable supporting means for both rotary and transverse movement of the armature.

3. In a magnetically operated mechanism, a magnet, an armature therefor, a movable support for said armature and means controlled by the magnet for laterally displacing said rollable supporting means into the field of the magnet.

4. In an electrically operated clock, a clock operating mechanism, a magnet, a rolling armature therefor and cam means operated in accordance with the movements of said armature for actuating said clock operating mechanism. f

5. In a magnetically operated mechanism, a ma et, a rotatably mounted armature there or, means for said armature to roll transversely of the magnetic field when said magnet is energized.

. 6. In an electrically operated clock mechu anism, a magnet, a rotatably mounted armature therefor, means controlled by said magnet for effecting a rolling motion of said ar mature transversely of the magnetic field when said ma net is energized control said c ock mechanism ture.

7. In an electrically operated clock, a clock operatinglmechanism, a magnet, an armature therefor aving a rotatable and transversely movable axial support and means cooperat- 1n said clock operating mec anism.

8. In an electrically operated clock, a clock operatingmechanism,'a magnet, an armature therefor, a rotatable and transversely movable axial support for said armature, a member pivotally mounted on said axial support and means cooperating with said pivotally mounted member for actuating said clock operating member.

by said armanet, an armature there or com rising a bar mounted on circular disks, a p ate. provided with an aperture for su porting-said circular disks, means associate with said armature and cooperating with said aperture to causea rolling motion of said armature when the magnetis energized.

10. In an electrically operated clock, a magnet, an armature therefore comprising a and means to 9. In an electrically o erated clock, a magbar mounted on a rotatable axis, circular disks for supporting said axis and a plate rovided with an aperture for supporting sai circular disks, a guide member associated with said armature and cooperating'with said aperture to cause a rolling motion of said armature when the magnet is energized.

-11. In an electrically operated clock, a clock operating mechanism, a frame member, a magnet mounted-thereon, a rolling armature controlledv by said magnet, a link member pivotally and slidably mounted on said frame member and cooperating with said rolling armature, a pin and slot connection associated with saidlink member for actuating said clock operating mechanism.

12. In an electrically operated clock, a magnet, a rolling armature therefor, a plate for supporting said rolling armature and resilient means for holding said rolling armature firmly against said plate.

13. In an electrically operated, clock, a clock operatin mechanism including a pawl carrying mem er, a magnet, a rotating armature therefor, a link member cooperating with said armature, and a pin carried by said link and cooperating with a slot formed in said pawl carrying member.

14. In a magnetically operated mechanism, a magnet, an armature therefor, and means supporting said armature to cause a simultaneously translatory and rotary motion of said armature upon energization or deenergization of said magnet.

In testimony whereof I hereto aflix my signature.

OLINTON E. LARRABEE.

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