US 1019923 A
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Description (OCR text may contain errors)
G. G. SCHELTBR. CONIOUR GAGE. APPLICATION FILED JAN. 11, 190B.
1,01 9,923, v Patented Mar. 12, 1912.
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GEORGE G'. SCHELTER, OF ROCHESTER, NEW YORK.
To all whom 'it may concern:
Be it known that I, GEORGE G. SGHELTER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Contour- Grages; and I do hereby declare the following to be a full, clear, and exact description of the saine, reference being had to the accompanying drawings, forming a part of this specification, and to the referencenumerals marked thereon.
The present invention, which relates to contour gages of the type in which a plurality of thin slides is movable on a suitable holder so as to be made to conform to a prolile of an object, has for an object to provide a construction which shall be inexpensive to manufacture, simple in operation, and durable in use.
Another feature is the provision of an adjustable stop to bear against the surface of an object whose prole is to be taken; and still another feature is the provision of means whereby the position of the profile with relation to some other part of the object may be obtained.
To these and other ends the invention consists in certain improvements and combinations and arrangements of parts that will be hereinafter more fully described, the novel feature being pointed out in the claims at the end of this specification.
In the drawings: Figure 1 represents a plan view of a gage constructed in accordance with this invention, one application of the position determining device being shown; Fig. 2 represents a longitudinal section through the holder; Fig. 3 represents a section on line a-a Fig. 2; Fig. 4 represents a section on line b-b Fig. 2; Fig. 5 represents the gage in plan with the position determining device in another position'; and Fig. 6 shows transverse sections of a number of embodiments of the slides.
The invention, which is susceptible of being embodied in various constructions, comprises a suitable holder which, in the present instance, for the purposes of economy and durability consists of a hollow cylindrical body having diametrically arranged longitudinal slots, the body being formed by two segmental sect-ions of a tube and heads 2 and 3 secured within the ends of the sections. The head 2 may be formed with oppositely extending projections 4 which provide an- Speccation of Letters Patent.
Application led January 11, 1908.
Patented Mar. 12, 1912.
serial No. 410,341.
the slots formed in the holder and each has 1 at one end lugs 6 and 7, the lug 7 having it-s lower edge in the plane of the lowermost surface of the body. =The other end of each slide is beveled at 8 and has a laterally extending lug 9, the outer edge of which is in a plane with the lower face of the lug 7. These lugs G, 7 and 9 serve to limit the movement of the slides, and the last two serve also to prevent the rocking of the gage when it is desired to copy a profile by passing a marking device along the beveled ends 8. As the slides are liable to shift laterally relatively to each other it is preferable to form their proximate faces so that they interlock and to accomplish this I may make them of irregular cross section such for instance as shown in Fig. 6 at a, c and d. Of these forms those indicated by a and Z) are preferred as the interlocking portions of the4 proximate faces extend only throughout a portion of the slides and in this manner only the central portions engage, t-hus reducing the friction between the slides.
During the copying of a profile it is desirable to support the gage against the surface independently of the slides as otherwise the holder may move too far toward the obje/ct. For this purpose I provide a stop l0 which is preferably adjustable by sliding through the slots in the holder in order that it may engage points at different distances from the holder to permit sufficient adjustment of the slides 5. This stop is held in its various posit-ions by means of a set screw ll which preferably passes through an opening in one. of the sections 1 and the head 2.
A slight friction placed upon the slides during their sliding movement will enable them to reta-in their adjusted positions and for this reason I employ a friction device in the form of a bar 12 Figs. 2 and 3 curved transversely throughout its length to provide two spaced friction edges 12a and 12b and arranged within the holder so as to extend transversely of the slides and in contact with the upper edges of the same, said bar being adjustable for the purpose of increasing or decreasing the friction by means of set screws 13 operable from the exterior' of the casing and bearing against the slides.
When the slides have been adjusted they are held in this position by adjustable locking means which preferably comprises a follower 14 working in the slots in the holder and preferably in that formed in the head. This follower provides extended bearing for the end slide 15 and has guide extensions 16 which work on opposite sides of the holder. The movement of the follower and consequently the release and the clamping of the slides is eected by a suitable device, such as set screw 17 turning in the head 3.
While the parts heretofore described are adapted for use alone it is preferred to embody a position determining device with them, that is a device by which the position of the profile may be determined with relation to some other part of the object. 'Ifo this end I provide an arm 18 which preferably has a sliding and also a pivotal connection with the holder near one end of the latter. The connection in the present embodiment is made by bifurcating the arm and A p providing the members formed by the bifurcation, each with a longitudinal slot 19, the
members being arranged on opposite sides of the holder and secured thereto by a clamping bolt 20 which passes through both slots and an opening in the head 3 where it is secured by a thumb nut 21. By this arrangement the arm may be positioned at different angles to the holder, and may-be adjusted to project more or less from the holder. Pivotally and slidably connected to the arm 18 is an arm 22 which is preferably provided with a longitudinal slot 23 and lies between the two members of the arm 18 so that it may be housed thereby as shown in Fig.. 1,
Copies of this patent may be obtained for or may be thrown to the position shown in Fig. 5, being held in any of its positions by a clamping bolt 24 working in the slots 19 and slot 23 and having a thumb nut 25 thereon. When in the position shown in Fig. 5 the arm 22 permits the determination of the position of a profile with relation to a wall hich is located some distance from the pro- A contour gage constructed in accordance with this invention is capable of securing results not heretofore accomplished as it is not only possible to obtain a profile but the relation of the profile to other faces may be secured. The stopl device acts to prevent the slides moving too far inwardly on the holder and supports the holder against movement due to the shaking of the hand of the user.
I claim as my invention:
1. A contour gage comprising a holder embodying two spaced sections, a plurality of contacting gaging slides working between the sections, a stop slide arranged at one end of the plurality of slides and working between said sections, and means for locking the stop slide aga-inst movement, independently of the gagng slides.
2. A contour gage comprising a holder in the form of a hollow member having diametrically arranged longitudinal slots of widths less than the internal width of the hollow portion of the holder, a plurality of gage slides contacting with each other and guided by the walls of the slot, and means coperating with said slides for compressing them in the direction of the lengths of the slots.
G. WILLARD RICH,
RUSSELL B. GRIFFITH.
ve cents each, by addressing the Commissioner of Patents, Washington, D. G.