US145947A - Improvement in pitmen - Google Patents

Improvement in pitmen Download PDF

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US145947A
US145947A US145947DA US145947A US 145947 A US145947 A US 145947A US 145947D A US145947D A US 145947DA US 145947 A US145947 A US 145947A
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Prior art keywords
treadle
follower
bearing
pitmen
bar
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04Connecting-rod bearings; Attachments thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32606Pivoted
    • Y10T403/32819Pivoted including tension or take-up means
    • Y10T403/32844Manually variable
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2142Pitmans and connecting rods

Description

J. H. HOLLY & J. F. ROBERTSON. Pitmen.
Nod 15,947. 7 Patented Dec. 30,1873.
UNITED STATES PATENT Orrron.
JAMES H. HOLLY AND JOHN F. ROBERTSON, OF WARWICK, NEW YORK.
IMPROVEMENT IN PITMEN.
Specification forming part of Letters Patent No. 145,947, dated December 30, 1873; application filed November-12, 1873.
To all whom it may concern:
Be it known that we, J Arms H. HOLLY and JOHN F. ROBERTSON, of Warwick, county of Orange and State of New York, have invented certain new and useful Improvements in Sewing-Machine Treadle-Bars, of which the following is a specification:
The accompanying drawing represents a 1011- gitudinal sectional View of our improvement.
Arepresents the treadle-bar, the general form of which is similar to those commonly used in sewing-machines, to connect the treadle with the fiy-wheel shaft. The lower end, a, is split, and provided with a screw, 1), passing through one of the halves of the split portion, and engaging with a female thread in the other half, so that when the bearing becomes worn loose from friction the screw may be tightened, so as to draw the parts toward each other, and thus tighten the bearing, and cause it to fit neatly on the pivot with which it engages. The opposite end a has an elongated opening formed in it, one end of which is semicircular, and forms one-half of the bearing for the crank of the fly-wheel. The other end of this opening is angular, and its sides are parallel, and
in it fits a block or follower, c, the upper end of which presents a concave semicircular surface, which completes the circle, of which the end of the opening forms one-half. The remaining portion of the follower corresponds in form with the elongated portion of the opening. In the end of the treadle-bar a recess, (1, is drilled, passing through and belowthe crankshaft bearing. In this recess works a screwthreaded rod, e, the outer end of which is angular, and fits in a depression in the follower 0, so as to prevent it from turning on its axis. A slot, f, is cut transversely in the treadle-bar,
so, as to intersect the recess (1, and in this slot is placed a nut, 9, through which the screwthreadcd rod '0 passes. The diameter of this nut is somewhat greater than the thickness of the treadle-bar, so that its edges project slightly on either side, said edges being milled or roughened, to facilitate its manipulation by the thumb and finger.
The slot f may, if preferred, be formed in the portion of the treadle-bar between the bearing and the extreme end, and the screw-rod e and follower 0 arranged to correspond. When they are arranged between the bearing and the center of the treadle-bar, and the end a is uppermost, the portion of the recess (1 nearest the end serves as a receptacle for oil to lubricate the bearing. When the bearing has become loose from wear and friction, it is tightened by turning the nut 9, so as to cause the rod 0 to bear upon the follower c, and press it closely against the crankpm. 1
I donot claim the invention of a follower, as it is in common use in various machines; but
WVhat I do claim as my invention, and desire to secure by Letters Patent, is-- The combination, in a sewing-machine treadlebar, of the bar A, having elongated opening it, slot f, and recess d, with follower c, and rod 6, having nut 9, all. constructed and operating to effect the ready adjustment of the follower c, substantially as shown and described.
In testimony that we claim the foregoing as our invention we hereunto affix our signa tures.
JAMES H. HOLLY. JOHN F. ROBERTSON. Witnesses:
ANDREW MoEwEN,
GEO. V. PITT.
US145947D Improvement in pitmen Expired - Lifetime US145947A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573457A (en) * 1947-07-07 1951-10-30 Bendix Aviat Corp Motion transmitting device
US6405379B1 (en) 1998-07-14 2002-06-18 Jim E. Kelly Shirt cuff and fastener
US20080080343A1 (en) * 2002-09-02 2008-04-03 Shim Jae-Seong Optical information storage medium and method of and apparatus for recording and/or reproducing information using different modulation methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573457A (en) * 1947-07-07 1951-10-30 Bendix Aviat Corp Motion transmitting device
US6405379B1 (en) 1998-07-14 2002-06-18 Jim E. Kelly Shirt cuff and fastener
US20080080343A1 (en) * 2002-09-02 2008-04-03 Shim Jae-Seong Optical information storage medium and method of and apparatus for recording and/or reproducing information using different modulation methods

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