US1237992A - Calipers and dividers. - Google Patents

Description

H. L. AUSTIN- CALIPERS AND DIVIDERS. APPLICATION HLED MAR. 6. I917.-

Lzsm a I Patented Aug. 21, 1917.

H-L Aust irv.

attoz we x1 HARRY L. AUSTIN, F HURON, SOUTH DAKOTA.

CALIPERS AND DIVIDERS.

Specification of Letters Patent.

Patented A11 21, 1917.

Application filed. March 6, 1917. Serial No. 152,846.

To all whom it may concern:

Be it known that I, HARRY L. AUs'rIN, aoitizen of the United States, residing at Huron, in the county of Beadle, State of South Dakota, have invented certain new and useful Improvements in Calipers and Dividers; and I do hereby declare the following to be a full, clear, and exact description of the invention such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an improvement in measuring instruments and has particular reference to calipers and like devices.

An object of the invention is to provide an improved adjusting means for the arms of a caliper or divider whereby the strain on the screw members, incident to some instruments now commonly employed, is relieved.

Another object is the provision of a device of this character which is simple in construction, easy to manufacture and effective in carrying out the purpose for which it is designed.

The inventive idea involved is capable of receiving a variety of mechanical expressions one of which for the purpose of illustratin g the present invention, is shown in the accompanying drawing, wherein Figure 1 is a side elevation of a caliper constructed in accordance with the invention.

Fig. 2 is an edge elevation thereof.

Fig. 8 is a longitudinal section.

Fig. 4: is a detail perspective view of one of the ball housings.

Referring more particularly to the accompanying drawing in which like reference characters indicate similar parts the numerale 5 and 6 indicate the usual arms of the caliper pivoted at 7 and provided with the usual handle 8.

The adjusting means which comprises the essential feature of this invention is shown in what is now believed to be its preferred form and consists in providing the leg or arm 5, intermediate its ends, with a ball bearing seat 7 in its outer edge which communicates with an elongated cut out portion or slot 8 upon the inner edge thereof. The bearing member 9, preferably in the form of a ball is mounted upon the seat 7 and is retained in position therein by the housing 10 having its central portion enlarged and provided with a recess 11 to accommodate a portion of the bearing 9 and also having its ends countersunk in the outer edge of the arm 5 and secured thereto by means of suitable fasteners 12.

The arm 6 of the instrument is also provided with a bearing seat 13 in the outer edge thereof which communicates with a slot 1% formed in the inner edge of said arm and disposed opposite to the seat 7 and slot 8 in the arm 5. The seat 13 also receives a ball bearing member 15 having a central screw threaded opening 16 extending therethrough said member being retained in its position in said seat by a housing plate 17 constructed similarly to the plate 10 and secured to the outer edge of the arm 6 by means of fasteners 18. The housing 17 is provided with an elongated longitudinally extending slot 19 through which extends an adjusting device 20 preferably in the form of a screw member having a milled head 21 at one end. This screw member is also threaded in the screw threaded opening 16 of the bearing member 15 and has its other end secured in a socket in the bearing member 9.

In practice, it will be apparent by turning the screw member 20 in eithe direction the arms 5 and 6 will be adjusted toward or away from each other and by reason of the slots 8 and 14: and 19. the arms of the device will be permitted to swing about their pivot until the ends of said slots engage the screw member and it will also be apparent that any strain upon the latter is prevented.

What is claimed is 1. In a measuring instrument including a pair of arms, each of which is provided with a communicating bearing seat and slot, a bearing member mounted in each of said seats. one of said bearing members having a screw threaded opening therethrough, a housing plate for each bearing member one of which has an elongated slot, and a screw threaded adjusting device extending through and adjustable in a slot in said housing plate, the screw threaded opening in said bearing member, the slots in said arms and secured to the other bearing member.

2. In a measuring instrument including a pair of pivoted arms, each of which is provided upon its outer edge with a bearing seat and upon its inner edge with a slot communicating with said seat, a bearing member mounted in the seat of one of said arms. a housing secured to the outer edge of the last named arm and having a seat for bearing member having a longitudinal slot receiving said bearing member, a second second bearing member, and the slot in the 1) bearing member mounted in the seat of the second named housing.

other arm and havingascrew threaded open- Intestimony whereof, I afliX my signaing therethrough, a housing for said second tnre, in the presence of two witnesses.

V HARRY L. AUSTIN.

therein, and a screw member having one end secured to the first named bearing member W'itnesses: and extending through the slots in, said W; H, ALLINGHAM. arms, the screw threaded opening in the EARL J. KINsMAN.

copie s otj this patent maybe o bta ined for five cents each, by eddressingthe Commissioner o1 Ratents,

Washington, .D. 0.. Y

Images