US2085461A - Combination rule and slidable head - Google Patents

Description

June 29, 1937. .1. s. CHAFEE COMBINATION RULE AND SLIDABLE HEAD Filed June 11, 1935 llll lllllllllfl INVEN TOR. (fa/712 J2 050x66 i @314 M A TTORNEYS.

Patented June 29, 1937 PATENT OFFICE COMBINATION RULE AND SLIDABLE HEAD John S. Chafee, Providence, R. I., assignor to Brown & Sharpe Manufacturing Company, a corporation of Rhode Island -Application June 11, 1935, Serial No. 25,996

12 Claims.

Thisinvention relates to a rule with a head member movable therealong for testing or laying out purposes; and has for one of its objects the provision of means whereby the relative position of the rule and the head member can be adjusted for securing the desired relation of the two parts.

Another object of theinvention is the provision of a lateral adjustment of the rule relative to one of the heads so that the parts may be variously adjusted to suit the convenience of different users.

Another object of the invention is the provision of an aligning'or adjusting means so that the head may be moved through different angular positions or adjusted laterally of the rule for securing the desired relative position of the two parts.

Another object of the invention is the provision of a construction whereby the parts may be aligned without the accurate grinding of certain surfaces of thehead part which has heretofore been necessary Another object of the invention is the provision of a construction which from a manufacturing standpoint may effect a great saving in the manufacture of the parts, such for instance as a provision by which a multiplicity of parts can be ground together.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a top plan View of a rule or scale with several different heads mounted thereon which are supplied as a combination set;

Fig. 2 is a fragmental view of a portion of the rule, showing the center head in section as mounted thereon";

Fig. 3 is a sectional View of the center head;

Fig. 4 is a section on line 4-4 of .Figure 1;

Fig. 5 is a section on line 55 of Figure 3.

In the manufacture of a combination rule and centering, testing or truing up heads slidable thereon, it has been necessary to grind the contacting surfaces of the parts including the slot in the head which receives the scale with ac- 0 curacy in order that a proper position and alignment of the different parts of the assembly may be had. In the case of the grinding of the center head on the scale, it was necessary to grind each surface individually because of the necessity of indexing the head from its first grinding position about a pivot point which passes through the apex of the right angularly related faces was to accurately position the second face sothat it may be ground in a definite relation with reference to the other ground faces and also so that its apex is at a certain definite position withrelation to the surface edge of the slot which slides along the edge of the scale; and I have provided a means whereby much less expensive procedure need be had in themanufacture as the surface of the slot need not now be in a definite relation to the apex or intersection of the right angular faces of the center head, and I may make certain adjustments by reason of two pins so that the slot may be cut deeper and then the ends of these pins which project into the slot serve as guiding points to engage the edge of the scale and cause it to be properly aligned with the apexof the angle by the two right angular surfaces. By reason of these spaced points of contact I may cause an angular relation to be had between the edge of the scale and the right angular surfaces'which engage the work, and thus I do not need to accurately align the edgesof the slotnor do I need to have a slot at a certain definite angular relation by'reason of my adjusting pins. Further, by this arrangement, I can grind a multiplicity of center head surfaces at one position and then turn this multiplicity about a'pivot'parallel to the apex of the angle formed by the two meeting'sur faces and grind the other surface. Thus it is not necessary to grind each center head individually or turn each one about an axis passing parallel to the edge of the slot which formerly engaged the edge of the scale, whereby I am enabled ,to

eifect a great saving in theprocess of the manufacture of the parts as well as obtaining an 'instrument capable of more extended use; and the following is .a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawing, 1 have shown a rule or scale I 0 which is provided with a groove l I extending longitudinally in one surface thereof, preferably in the center thereof with the opposite edges l2 and. I3 of this rule parallel to the center groove 1 I extending midway between these opposite edges l2 and I 3.

Various heads are shown in Figure 1 as mounted on the rule, there being'a square head I4, a protractor head l5 and a center head l6 illustrated in Figure l. Eachof these heads has a slot for the reception of the rule In anda means for .engaging the groove 1 I anddrawingone edge of this slot towards the edge of the rule. This invention may be applied to any one of these heads, although it is particularly useful in connection with the center head I6, and I will, accordingly, describe the same in further detail in connection with this center head, although I do not limit myself to its use in this head for any of its functions which may be performed elsewhere.

The center head l6 consists of a body portion H with arms I8 and I9 extending therefrom, the surfaces and 2| of which are in right-angularly extending planes or at 90 one to the other. The apex of this angle will be'd'esignated generally 22. A slot 23 is cut through the body I6 and one of the arms so as to receive the rule Ill. One surface 24 of this slot which has heretofore been required to pass through the apex 22 of the angle 'or through the intersection ofth'e right angularly extending surfaces 20 and 2| and also in a plane half way between the planes of these two surfaces, is now out deeper than heretofore so that the surface 24 of the edge of this slot is in a plane which does not pass through the apex of this angle but israther at one side and althoughpreferably so it is not necessarily parallel to thisplane.

A pair of openings 25 and 26 are bored in the body portion I! of the head and tapped to receive thejthreaded pins 21 and 28 which provide bearingsurfaces 29 and 30 to, engage the edge l3 of the rule I0. These pins are slotted as at 3| so that they may be engaged by a screw driver or the likelfor adjustment by rotation so as to project one or the other of these further into'the slot and'thus vary the relative position of the rule in the .head, either laterally by moving both pins the same amount'to determine whether or not the edge l3 passes through the apex of the angle 22 or to oneside thereof for the accommodation of the thickness of a pencil line or the like, or these pins 21 and-28 may be adjusted one more than the other so as to vary the angular relation of the edge |3 with-reference to the surfaces 20 and2| and thus adjust the edge so thatit will accurately be located in a plane half way between the plane of-the surfaceslfl and 2| orat any other desired position which may be required. These pins 21 and28 areheld in adjusted position by set. screws 44 threaded into the body of the head. t p

. In orderto draw the edge I 3 of the rule towards these pi-nsor bearing points, I provide a pin 35 having a, hook end 36 with spaced engaging pointsto extend into the groove II. This pin passes through bore 31 in the body and its threads 38 are engaged by a nut 39 on the outer end of the pin35 which when turned to move the nut inwardly, abuts the body H as at .40so as to move the bodyand the edge of 'the rule inopposite directions upon such adjustment. This nut has a knurled handle v4 I for affording a more secure grasp, while a spring 42 is provided for tending tomove the parts in the opposite directionv and lfor'h'olding them tight'although'yieldable as more fully explained in Patent No. 1,529,209, with which I am familiar, and which is owned by my 'assignee, I 'By this arrangement I do' not have ,to accurately cut slot 23 or even finish it, but can 0b the surface 24 with reference to the surfaces 20 and. 2| was essential.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. In combination, a rule, a head having a slot therein for slidably receiving the rule, and means in said slot for bearing against an edge' of the rule at a plurality of spaced portions therealong and movably mounted with reference to the head for movement against said edge portion of the rule for laterally and also angularly adjusting the position of the head with relation to the rule.

2. In combination, a rule, a center head having a slot therein for slidably receiving the rule and I provided with right angularly related work engaging faces, and means for angularly adjusting said head as a unit with reference to said rule to position the edgeof the rule in an angular relation between the work-engaging faces.

3. In combination, a rule, a head having a slot therein for slidably receiving the rule, spaced bearing members for engaging against an edge of said, rule and movably mounted in said head and protruding into said slot, and means to securesai'd rule laterally and angularly with reference to said head and seated upon said bearings. 4. In combination, a center head having right angularly related work engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule in said slot having a groove in one face thereof, clamping means engaging said groove to draw the rule towards one edge of the slot, and adjustable bearing means movably mounted in said head and projecting through said slot edge to engage an edge ofthe rule, said means being adjustable for laterally shifting the rule'with reference to said head for shifting the edge of the rule with reference to the intersection of the faces.

5.'In combination, a center head having right angularly related work engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule in said slot having a groove in one face thereof, clamping means engaging said groove to draw the rule towards one edge of the slot, and adjustable bearing means movably mounted in said headand projecting through said slot edge to engage an edge of the rule, said means being adjustable for angularly shifting the rule with reference to said head that it may bear a different relation to said right angular faces.

6. In combination, a center head having right angularly related work-engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule in said slot having a groove therein, means engaging said groove to draw the rule towards one edge of the slot, and bearing means projecting through said slot edge to engage the rule, said means being adjustable for laterally or angularly shifting the rule with reference to said head that it may bear a different relation to said right angular faces.

7. In combination, a center head having right angularly related Work-engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said the rule and head.

8. In combination, a center head having right angularly related work-engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule movably mounted in said slot, means to draw the rule towards one edge of the slot,

spaced pins movably mounted in said head and projecting through said slot edge to engage the rule, and means for moving said spaced pins to vary the position of the rule and head.

9. In combination, a center head having right angularly related work-engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule movably mounted in said slot, means to draw the rule towards one edge of the slot, spaced threaded pins projecting through said slot edge to engage the rule and threadingly mounted in the head to vary the position of the rule and head, and means to secure said pins in an adjusted position.

10. In combination, a center head having right angularly related work-engaging faces with a slot therein for receiving a rule with one edge passing substantially through the intersection of said faces, a rule in said slot having a longitudinal groove on a side face thereof, clamping means engaging said groove to draw the rule towards one edge of the slot, and spaced pins movably mounted in said head and projecting through said slot edge to engage the rule, means for moving said spaced pins to vary the position of the rule and head, and means in said head to secure said pins in position therein.

11. In combination, a head comprising a body portion having a pair of right angularly inclined arms extending outwardly therefrom from a common intersection and with opposed work-engaging surfaces thereon, said body portion being integrally joined at the apex of said intersecting arms and extending outwardly therefrom in a plane passing through said apex and between the planes of the arms, one of said arms and said body portion having a rule receiving slot the bottom surface of which is disposed at one side of said apex and lies in a plane which is other than coincident therewith, said body having a hole therein which is disposed transversely thereof and cross-wise with respect to said slot, a rule movably mounted in said slot having a central longitudinal groove on a side face thereof, a clamping pin in the hole having an inner hook end carrying spaced engaging points to engage said rule groove, means on the outer end of said pin to clamp the pin in adjusted position, spaced bearing pins adjustably mounted in said head and projecting through said slot edge to engage the bottom edge of the rule, and means for adjusting said pins to shift the rule laterally or angularly with reference to said head.

12. In combination, a rule, a head having a slot therein for slidably receiving the rule, and a means in said slot for bearing against an edge of the rule and movably mounted with reference to the head for laterally and also angularly adjusting the position of the head with relation to the rule.

JOHN S. CHAFEE.

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