Improvements in Wrenches for Tightening the Wire Spokes of Cycles and other Machines.
Year: 1892

page_text: Date of Application, 27th Oct., 1892,
Complete Specification Left, 27th July, 1893-Accepted, 9th Sept., 1893
INOY LOIVNAD
Improvements in Wrenches for Tightening the Wire Spokes of
Cycles and other Machines.
1; JAMES SETON PRENTICE of 347 Pollokshaws Road, Glasgow in the County
of Lanark, North Britain, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in wrenches for tightening the wire spokes
of cycles and other machines.
With the wrenches at present in use it is necessary to clamp up the jaws of the
wrench by a thumb screw or like appliance which renders the wrench clumsy and
each time it is desired to tighten up the spoke, the jaws of the wrench have to be
adjusted by the thumb screw, also it is not possible to grip the spoke close to the
hub, the consequence being that the thread of the spoke is liable to get stripped.
In accordance with my invention, the one jaw of the wrench consists of a roller
pivoted eccentrically, the other being an ordinary fixed jaw.
Instantly that the wrench is operated the roller automatically tightens upon the
spoke and grips it against the fixed jaw of the wrench. The fixed jaw has pre-
ferably a groove cut across its face to catch the spoke and the roller is also
preferably roughened or formed with cuts across its face for the same purpose.
Upon actuating the handle of the wrench in the opposite direction, the roller
instantly and automatically disengages itself so that another feed can be given to
the wrench.
I preferably so mount the roller that the pin upon which it is mounted can be
withdrawn and inserted in two, three or other number of holes through the roller
so that a fresh face of the roller can be presented as wear occurs.
If desired I may employ a spring to keep the roller against the spoke when
starting to operate the wrench.
Dated this 26th day of October 1892.
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Wrenches for Tightening the Wire Spokes of
Cycles and other Machines.
I, JAMES SETON PRENTICE, of 347 Pollokshaws Road, Glasgow, in the County
of Lanark, North Britain, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention which relates to improvements in wrenches for tightening the
wire spokes of cycles and other machines has for its object to provide a simple and
effective wrench.
With the wrenches at present in use it is necessary to clamp up the jaws of the
wrench by a thumb screw or like appliance which renders the wrench clumsy, and
each time it is desired to tighten up the spoke, the jaws of the wrench have to be
adjusted by the thumb screw, also it is not possible to grip the spoke close to the
hub, the consequence being that the thread of the spoke is liable to get stripped.
In accordance with my invention, the one jaw of the wrench, consists of a roller
pivoted eccentrically, the other being an ordinary fixed jaw, as shown in side
elevation and plan, Figures 1 and 2 of the accompanying drawings, which are
Price S

page_text: drawn to an enlarged scale, and in which A is the roller or moveable jaw,
B the fixed or stationary jaw and C the handle. The roller A is pivotted
eccentrically to the double joint piece c of the handle C by means of a pin or
pivot D the said roller may also if desired be provided with grooved, notched,
or other roughened surface around its periphery so as to catch the spoke more
securely, the fixed jaw B being also formed with a groove or notch for the same
purpose.
The roller A is preferably provided with two, three or more holes a through
which the pivot D may be passed so as to enable a fresh or different face of the
roller to be used as other faces wear. Also if desired I may employ a spring to
keep the roller A against the spoke when starting to operate the wrench said
spring being suitably mounted to, and carried by, the handle piece C.
9
The whole thus forming an effective wrench which on the handle being operated
the roller automatically tightens itself against the spoke and so retains the spoke
in the groove of the fixed jaw, until the handle, is operated in the reverse direction,
when the roller automatically disengages itself from the spoke and so permits of
another feed being given to the wrench.
Having now particularly described, and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is-
1st. In wrenches for cycle and other machine wire spokes, the roller or moveable
jaw A, substantially as, and for the purposes, herein before described and shown in
the drawings.
2nd. The general arrangement, construction and combination of the eccentric
roller. A, fixed jaw B, handle C and pivot D, constituting my improved wrench for
the wire spokes of cycles and other machines, all substantially as hereinbefore
described and shown in the drawings.
JOHNSONS,
. 115, St. Vincent Street, Glasgow, Applicant's Agents.
Dated this 20 da
01
1030.
JOHNSONS,
. 115, St. Vincent Street, Glasgow, Applicant's Agents.