US2440522A - Stop for dial indicators - Google Patents

Description

Ami 27, 1942' c, s cm 2,440,522

STOP FOR DIAL INDICATORS Filed Aug. 14, 1946 'IIIIIIIIII Patented Apr. 27, 1948 UNITED PAT'E N T GFFIQE STGP FER DIAL .Glarence 800st, AtlantiaCity -N. J.

Application August 14, 1946 Serial N0. 690,452

stop or re-se't mechanism that issecured partly in :f-nont and partly "behind the di-a'l face. Then that part of the stop mechanism that is mounted intfront-o'f the dial face may be quickly and readset to' 'an-y desired-position and locked wane twist of a knob.

Still :another ob fiect of the invention is to pro-' vide an extremely simple stop that may be very accurately positioned .and .then looked against movement until it is desired '"to re-set the same.

With :these and other objects in view, the in- Vention consists in certain new and novel constructions and combination .of .parts .as will be hereinafter more fully described and pointed out in the claim.

Referring now .to the drawings :showing :a pretenred embodiment,

Fig. 11s ?a front face view :s'howing fragmentarily a dial with an indicator and a stop mechanism locked in position,

Fig. 2 is a side elevation of the same,

Fig. 3 is a rear view,

Fig, 4 is an enlarged sectional view taken on line 4-4 of Fig. 1, and

Fig. 5 is a fragmentary sectional view taken on line 5-5 of Fig. 1.

It will be understood that this stop or re-set indicator may be applied to the face plate or dial of numerous forms of mechanical, electrical or electronic instruments wherein an indicator hand or pointer is to be turned to a set position, and then moves in an anti-clockwise direction until its cycle is completed, after which the indicator finger is again to be set up against the stop to repeat the operation.

Referring now to the drawings, and for the moment to Fig. 1, there is shown the face plate I of a timer 2, and on this face plate I is shown the dial 3, which is calibrated as at 4, in any desired number of divisions. It so happens that in the timer to which the present stop is applied there are two hundred divisions.

Centrally of the dial 3 is an aperture 5 through which extends a sleeve 6 that is soldered or otherwise fastened to the rear face of the stop arm 1, while at the end of the sleeve E is the relatively 1 iCilaim. (Cl. 74-526) .2 large, :soldered, or otherwise fastened, 'iflat circular plate '8, as may be (seen in Fig. :3, is substantially the same asizeaor larger ithanthe dial 3. At the :outer end .o'f the arm I is a'smalsl post 9, against which an indicator or "pointer, ilater to be mentioned, is to be positioned, as will also be later mentioned.

:In .theipresentinstan'ce, the plate 8 is slightly out soutan d turned up .on its perlpheryito' fomn a ing :10 ion the :rear of the v:plate "8.

Referring to Figs. 3 and 5, there will lbeseen the ielamping :arm H, which is riveted as :at 2| 2 to the :rear i-of the :plate '1, there being a small spacing washer 13 between the plate .I and the arm :I l,.whi le the outer end :of the arm ii-l overlies the periphery of the plate :8.

Thus when the plate 58 is :r'euolvedin an anticlockwise direction from the position shown :in 3, the tug l-fl wviil inontact with the arm 11 l, and the :arm EDI]. the front JDfZ'GhB .face plate "I with its post 9 would be nearly opposite thegraduation ten r0109 .insFig. 1.

1n the present emnodiment, arm '1 :can mot be set closer to the zero point than thesgraduation ten :(10) as the timer is constructed inithis manner. However, :in many instances it would not be necessary to have this .lug in, and the plate I could revolve three hundred sixty (360) degrees.

Securely fastened to the clamping arm H is the threaded post I4 which extends through the face plate I and over which may be placed a small fiber washer l5, while fitted on the post I4 is a small threaded knob l5, so that when this knob I6 is turned down it will pull the clamping arm H tightly against the plate 8 and in turn hold it against the rear of the face plate I to hold the plate 6 from a turning movement even if the arm I were tried to be moved by the user.

As far as the specification has proceeded, therefore, it will be understood that there is an arm 1 on the face of the dial 3 with an upright post 9 at its outer end, while fastened to the arm I is the sleeve 6 which passes through the aperture 5 in the face plate I and has its other end fastened to the flat metal disk 8, which is to be locked or unlocked by a slight turn of the knob 16 to either clam or release the plate 8 against the back of the plate I. This in turn will either clamp the arm I in position relative to a chosen division on the dial or release the arm I so that its position may be changed.

Now, referring to Fig. 1, there will be seen a handle I! with its set screw [8 in the rear thereof so that this handle I! may be locked to a post l9 that passes through the sleeve 6 which is fitted in the central aperture 5 in the dial face 3 and sets the mechanism (not shown) in the timer. This handle H has a pointer or indicator 20, and in Fig. 1 it will be seen abutting against the post 9. In fact, the post 9 is slightly undercut as at 2| as may be seen in Figs 1 and 2.

Also, as may be seen in Fig. 1, there is a small stop 22 just below the zero point on the dial face 3, so the pointer 29will not be turned when setting in a wrong direction.

The operation of the device is as follows:

Supposing the timing mechanism is to operate for the period of time that it takes the pointer 29, set at the graduation thirty (30) to work back to the zero point, and this is to be repeated, we will say, a number of times. I

First, if the knob [6 were tight, it would be loosened to release the clamping arm H, and the pointer arm 29 would be set at the numeral thirty (.30), and the small post 9 on the arm I grasped with the fingers and the arm I moved until the post 9 contacts with the pointer 29.

Of course, another way to'set the stop would be tosimply loosen the small knob I6 and then turn the handle I! and turn the pointer 20 to the desired graduation, this pointer 20 in turn pushing the arm 1 and its post 9 ahead of it, and after the pointer 29 is 'at the desired graduation, then the disk 8 .will again be locked by turning the knob l6.

After the 'mechanism' (not shown) is started and the pointer 20 works back to the zero point; the mechanism (not shown) will be cut oil; but to re-set it, it is only necessary to grasp the handle I! and turn it in a clockwise direction until the pointer arm 20 again contacts with the post 9.

Thus, the operator does not have to look closely, each time at the graduations when the pointer arm 29 is to be set at, say thirty; as, in order to repeat, he simply turns the handle I! until the pointer arm 20 contacts with the preset post 9.

'This' is of great advantage when working in the dark room or a subdued light, or when the same setting is to be repeated many times.

By making the re-set or stop as above explained, it will be seen that the pointer 29 can be accurately set to any of the graduations desired, in fact, even between the graduations if so desired.

For a new setting of the arm I it is only necessary to unloosen the arm H by turning the knob l6, push the post 9 on the arm 1 against the pointer 20, and then turn the pointer 20 to any desired graduation which will'force the post 9 ahead of it, after which the knob l6 may again be turned to lock the plate 8 and its arm I in position. I

From the foregoing, it will beseen that I have provided a stop or re-set mechanism that is cheap to manufacture, readily assembled,qand may be set-with great accuracy. It also saves considerable time where there are a number of repeat operations to be made.

Having thus described my invention, what I claimis new and desire to secure by Letters Patent is: a V a I Y In a stop for dial indicators in combination with a face plate having a dial thereon, arotatable arm on the front of the face plate, an upstanding post at the outer end of. said arm, a relatively large rotatable disk on the back of the face plate secured to said arm, operable means extending through the face place for clamping the disk to the rear of the face plate in any selected rotated position to thereby also look the arm on the front of the face plate in a desired 7 selected position, a pointer arm adapted to be 40 The following references are of record limited in its reset position by the said post on 35 said arm, and means on the said disk for limiting the movement of said first mentioned arm.

CLARENCE S. 0ST.

REFERENCES CITED Goldstein Sept. 3, 1940

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