NEW STRIKING PART FOR A CLOCK. |gg 



number. If eight, the pendulum E fliould be about nine inches New ftriking 



long, and it will vibrate twice betwixt each blow of the hatn- ^^^ o^ a coc » 



mer; but if fixteen pins are put in the wheel, the pendu'Iunli 



tnuft be about three inches long, and will make fouf vibrations 



betwixt each blow. The pins for drawing the hammer niufl 



be eight in number, and be fixed in a circle of about half the 



diameter of the aforefaid pins. The locking-plate is on the 



main wheel. The flop is againft the pins on which the pallets 



a6l, and may be difcharged by a flirt piece. 



As I have defcribed the model, I beg leave to point out the 

 method of ftriking a clock by the common pendulum, true fe-> 

 conds, without any additional pendulum or pallets for the 

 ftriking part. 



Defcription. 



Fix a cantrite wheel with fixty teeth on the fame arbor witb 

 a fwing wheel of thirty teeth. Now fuppofe a ftriking part to 

 be made in the common way of making an eight^day clock, fo 

 far as the pallet pinion, leaving out the warning and fly pinions. 

 A crank piece muft be fixed on the pallet pinion, which muft 

 come into contact with the cantrite wheel, which is fixed on 

 the fwing wheel arbor. Then fuppofe the clock to be fet 

 a going, and the rack difcharged, the pallet pinion will make 

 a revolution on every vibration of the pendulum, by which 

 means a clock will ftrike feconds as true as a pendulum vi- 

 brates, which Thope will be confidered as ufeful for the pur- 

 pofes I have defcribed. I aifo beg leave to obfferve; that a 

 great advantage arifes in both the above machines, from their 

 not being liable to foul, as the fti'oke is given by the certain 

 and regular vibration, inftead of the uncertain motion of the 

 fly. Its advantage likewife depends on the cleannefs of the 

 work ; and church clocks will be much benefited from the de- 

 creafe of weight* 



I am, Sir, 



Your moft obedient fervant, 



EDWARD MASSEYi 



Charles Taylor, Efq. 



Hanky, in Stoffin^djliire^ 

 Jan. 12, 1803. 



^i 2 Dt/crlption 



