US1108706A - Dividers. - Google Patents

Dividers. Download PDF

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Publication number
US1108706A
US1108706A US83418514A US1914834185A US1108706A US 1108706 A US1108706 A US 1108706A US 83418514 A US83418514 A US 83418514A US 1914834185 A US1914834185 A US 1914834185A US 1108706 A US1108706 A US 1108706A
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US
United States
Prior art keywords
pin
legs
dividers
view
lugs
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US83418514A
Inventor
Henry Franklin Coffman
Original Assignee
Henry Franklin Coffman
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Publication date
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Priority to US83418514A priority Critical patent/US1108706A/en
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Publication of US1108706A publication Critical patent/US1108706A/en
Anticipated expiration legal-status Critical
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021Measuring pressure in heart or blood vessels

Description

H. P. COFFMAN.
DIVIDERS.
APPLICATION rum APR.24,1914.
Patented Aug. 25, 19%
Juvenioz HENRY FRANKLIN COFPMAN, OF JARRVILLE, CALIFORNIA.
DIVIDERS.
Specification of Letters Patent.
Patented Aug. 1914.
Apf lica tior. filed April 1914. Serial No. 834,185.
lie it known that .l, HENRY i {loFrB-Z. a citizen of the United Sta residing rd Cari-ville. in the county of lrinitv. finite 0! California. have invented certain new and useful Improvements in llividers: and I do hereby declare the folloni to he a full, clear, and exact description of the in ention, such as will enable others: :-,l illed in the art to which it appertanis to make and use the same.
The present invention i directed to improvements in dividers and has for its object to so construct an instrument of this character particularly designed for finding the e.\'.act center of a circle.
A further object of the invention is to provide a divider which can he easily and quickly adjusted for finding the centers of circles of difi'erent diameters, and further provide a deviee \\'liicl1 may he used to find the center of pipe sections.
With these and other objects in view, this invention resides in the novel tcaturer-a or construction, forn'iation, coinl'iination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which? Figure 1 is a side elevation of the device. Fig. 2 is an edge view. Fig. 3 view on the line 3 of Fig. 1. Fig. 4 is a partial central sectional view. Fig. :1 is a sectional view on line 5-3 of i. Fig. (3 is a fragn'ientary perspective view of one of the divider legs.
Referring to the drawin the. numeral 1 designates the head, the same being provided with grooves 2 wnich coar t with the curved edges 3 formed in H upper ends of the divider legs 4, said heing' held in the grooves the bowed leaf spring 5, the ends of vhich engage the notches 6 formed in the upper ends of said q The centering pin 7 is threaded in the. bore 8 formed in the head 1, and has its upper end provided with a knob 9 which is a sectional T when rotated will raise or lower said pin.
The upper end of the pin 7 isopcrable in the perforation 10 formed in the spring 5.
iivotally mounted upon the legs 4 are lugs ll. said lugs being: threaded for engagem nt hy the adjustingscrew 12, which oma'witelv threaded so that rotation in one dire tion will draw the legs toward each other, and when rotated in another direction the legs will he sgread. each end of said screw hein; provided with the opcrating hnoh l3. di-rshiod that the threads of the lugs 11 are pitched o positely.
ixed in spaced relation upon the central part of the scre\v,12 are disks 14 which span the pin 7 so that upon adjustment of the legs-'4 the point of the pin 7 will be at all times positioned at an equal distance from the points of the legs.-
lf-roin the foregoing description it will 'he seen that the pin 'T'can be readily elecentering pin, and a snob carried hv theupper eihl of the centering pin to facilitate the rotation of the pin, as and for the purpose set forth.
in testimony whereof I ailix my signature in the presence of two witnesses.
HENRY FRANKLIN COFFMAN.
Vtitnesses M. A. NonoYKn, W. J. Harmon.
an adjusting screw It will be of course un-
US83418514A 1914-04-24 1914-04-24 Dividers. Expired - Lifetime US1108706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US83418514A US1108706A (en) 1914-04-24 1914-04-24 Dividers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83418514A US1108706A (en) 1914-04-24 1914-04-24 Dividers.

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US1108706A true US1108706A (en) 1914-08-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547354A (en) * 1945-04-25 1951-04-03 Worden Walter Frank Center marking caliper
US3783518A (en) * 1971-05-10 1974-01-08 R Jones Carpenter{40 s tool
US9377281B2 (en) 2013-12-23 2016-06-28 James Dankowski Precision tool for locating center lines in geometric shapes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547354A (en) * 1945-04-25 1951-04-03 Worden Walter Frank Center marking caliper
US3783518A (en) * 1971-05-10 1974-01-08 R Jones Carpenter{40 s tool
US9377281B2 (en) 2013-12-23 2016-06-28 James Dankowski Precision tool for locating center lines in geometric shapes

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